{"type": "FeatureCollection", "features": [{"id": "10.1002/ece3.6547", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-31T06:55:02Z", "type": "Journal Article", "created": "2020-07-09", "title": "The distribution of herbivores between leaves matches their performance only in the absence of competitors", "description": "Abstract

Few studies have tested how plant quality and the presence of competitors interact in determining how herbivores choose between different leaves within a plant. We investigated this in two herbivorous spider mites sharing tomato plants: Tetranychus urticae, which generally induces plant defenses, and Tetranychus evansi, which suppresses them, creating asymmetrical effects on coinfesting competitors. On uninfested plants, both herbivore species preferred young leaves, coinciding with increased mite performance. On plants with heterospecifics, the mites did not prefer leaves on which they had a better performance. In particular, T.\uffc2\uffa0urticae avoided leaves infested with T.\uffc2\uffa0evansi, which is in agreement with T.\uffc2\uffa0urticae being outcompeted by T.\uffc2\uffa0evansi. In contrast, T.\uffc2\uffa0evansi did not avoid leaves with the other species, but distributed itself evenly over plants infested with heterospecifics. We hypothesize that this behavior of T.\uffc2\uffa0evansi may prevent further spread of T.\uffc2\uffa0urticae over the shared plant. Our results indicate that leaf age determines within\uffe2\uff80\uff90plant distribution of herbivores only in absence of competitors. Moreover, they show that this distribution depends on the order of arrival of competitors and on their effects on each other, with herbivores showing differences in behavior within the plant as a possible response to the outcome of those interactions.Management of mixedwoods is advocated as an effective adaptation strategy to increase ecosystem resiliency in the context of climate change. Although mixedwoods have been shown to have greater resource use efficiency relative to pure stands, considerable uncertainty remains with respect to the underlying ecological processes. We explored species interactions in Scots pine/European beech mixedwoods with the process\uffe2\uff80\uff90based model FORECAST Climate. The model was calibrated for two contrasting forests in the southwestern Pyrenees (northern Spain): a wet Mediterranean site at 625\uffc2\uffa0m.a.s.l. and a subalpine site at 1335\uffc2\uffa0m.a.s.l. Predicted mixedwood yield was higher than that for beech stands but lower than pine stands. When simulating climate change, mixedwood yield was reduced at the Mediterranean site (\uffe2\uff88\uff9233%) but increased at the subalpine site (+11%). Interaction effects were enhanced as stands developed. Complementarity dominated the Mediterranean stand but neutral or net competition dominated the subalpine stand, which had higher stand density and water availability. Reduced water demand and consumption, increased canopy interception, and improved water\uffe2\uff80\uff90use efficiency in mixtures compared to beech stands, suggest a release of beech intraspecific competition. Beech also facilitated pine growth through better litter quality, nonsymbiotic nitrogen fixation, and above\uffe2\uff80\uff90 and belowground stratification, leading to higher foliar nitrogen content and deeper canopies in pines. In conclusion, mixtures may improve water availability and use efficiency for beech and light interception for pine, the main limiting factors for each species, respectively. Encouraging pine\uffe2\uff80\uff93beech mixtures could be an effective adaptation to climate change in drought\uffe2\uff80\uff90prone sites in the Mediterranean region.

", "keywords": ["0106 biological sciences", "2. Zero hunger", "Interspecific competition", "13. Climate action", "Fagus sylvatica", "Mixedwoods", "Pinus sylvestris", "15. Life on land", "Species complementarity", "Intraspecific competition", "01 natural sciences", "6. Clean water", "Ecological modelling"]}, "links": [{"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1002/eco.1810"}, {"href": "https://doi.org/10.1002/eco.1810"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecohydrology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1002/eco.1810", "name": "item", "description": "10.1002/eco.1810", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1002/eco.1810"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-01-25T00:00:00Z"}}, {"id": "10.1007/s10021-002-0201-x", "type": "Feature", "geometry": null, "properties": {"license": "Restricted", "updated": "2026-05-31T06:55:33Z", "type": "Journal Article", "created": "2003-11-26", "title": "Effects Of Increased Nitrogen Deposition On The Distribution Of N-15-Labeled Nitrogen Between Sphagnum And Vascular Plants", "description": "To elucidate the sensitivity of bog ecosystems to high levels of nitrogen (N) deposition, we investigated the fate of 15N-labeled N deposition in bog vegetation in the Netherlands, both at ambient and increased N deposition. We doubled N deposition by adding 5 g N m\u22122 y\u22121 as dissolved NH4NO3 during three growing seasons to large peat monoliths (1.1 m diameter) with intact bog vegetation kept in large outdoor containers. A small amount of 15N tracer was applied at the start of the second growing season, and its distribution among Sphagnum, vascular plant species, and peat was determined at the end of the third growing season. The 15N tracer was also applied to additional plots at the untreated field site to check for initial distribution. One week after addition, 79% of the total amount of 15N retrieved was found in the living Sphagnum layer and less than 10% had been captured by vascular plants. Fifteen months later, 63% of the total amount of 15N retrieved was still present in the living Sphagnum layer at ambient N deposition. Increased N deposition significantly reduced the proportion of 15N in Sphagnum and increased the amount of 15N in vascular plants. Deep-rooting vascular plant species were significantly more 15N enriched, suggesting that at higher atmospheric inputs N penetrates deeper into the peat. Our results provide the first direct experimental evidence for that which has often been suggested: Increased atmospheric N deposition will lead to increased N availability for vascular plants in ombrotrophic mires.", "keywords": ["0106 biological sciences", "Peat monoliths", "15N tracer", "Bog ecosystem", "Ombrotrophic mire", "Competition", "Nitrogen", "15. Life on land", "01 natural sciences", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1007/s10021-002-0201-x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecosystems", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10021-002-0201-x", "name": "item", "description": "10.1007/s10021-002-0201-x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10021-002-0201-x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2002-08-01T00:00:00Z"}}, {"id": "10.1016/j.agrformet.2017.10.013", "type": "Feature", "geometry": null, "properties": {"license": "Restricted", "updated": "2026-05-31T06:56:25Z", "type": "Journal Article", "created": "2017-10-19", "title": "Climate-Smart Agroforestry: Faidherbia Albida Trees Buffer Wheat Against Climatic Extremes In The Central Rift Valley Of Ethiopia", "description": "Abstract Faidherbia albida parklands cover a large area of the Sudano-Sahelian zone of Africa, a region that suffers from soil fertility decline, food insecurity and climate change. The parklands deliver multiple benefits, including fuelwood, soil nutrient replenishment, moisture conservation, and improved crop yield underneath the canopy. Its microclimate modification may provide an affordable climate adaptation strategy which needs to be explored. We carried out an on-farm experiment for three consecutive seasons in the Ethiopian Central Rift Valley with treatments of Faidherbia trees with bare soil underneath, wheat grown beneath Faidherbia and wheat grown in open fields. We tested the sensitivity of wheat yield to tree-mediated variables of photosynthetically active radiation (PAR), air temperature and soil nitrogen, using APSIM-wheat model. Results showed that soil moisture in the sub-soil was the least for wheat with tree, intermediate for sole tree and the highest for open field. Presence of trees resulted in 35\u201355% larger available N close to tree crowns compared with sole wheat. Trees significantly reduced PAR reaching the canopy of wheat growing underneath to optimum levels. Midday air temperature was about 6\u00a0\u00b0C less under the trees than in the open fields. LAI, number of grains spike\u22121, plant height, total aboveground biomass and wheat grain yield were all significantly higher (P", "keywords": ["Crop physiology", "2. Zero hunger", "Competition", "13. Climate action", "Local adaptation", "Climate change", "0401 agriculture", " forestry", " and fisheries", "Facilitation", "04 agricultural and veterinary sciences", "15. Life on land", "Heat stress", "6. Clean water"]}, "links": [{"href": "https://doi.org/10.1016/j.agrformet.2017.10.013"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agricultural%20and%20Forest%20Meteorology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.agrformet.2017.10.013", "name": "item", "description": "10.1016/j.agrformet.2017.10.013", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agrformet.2017.10.013"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-01-01T00:00:00Z"}}, {"id": "10.1007/s11258-005-9020-4", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-05-31T06:56:01Z", "type": "Journal Article", "created": "2005-08-24", "title": "Recovery Of Subalpine Dwarf Shrub Heath After Neighbour Removal And Fertilization", "description": "We tested if subalpine heath vegetation in northern Italy recovered after experimental perturbation of soil nutrient availability (fertilization) and species composition (removal of co-dominant dwarf shrubs). Species cover was assessed non-destructively before the start of the treatments (1995), at the end of the treatments (1999) and 4 years after the treatments ended (2003). Shrub removal had rather modest effects on heath vegetation, except for mosses which decreased significantly in removal plots. Fertilization decreased the cover of shrubs, mosses, and some graminoids but increased the cover of Festuca rubra. Fertilization converted heath to grassland, but the response of graminoid species was individualistic. Fertilization decreased vascular species richness and evenness, probably through negative effects of shading and litter accumulation on plant growth or recruitment. The vegetation had not recovered completely 4 years after the perturbations had stopped. This suggests that, in contrast to rapid responses to species removal and fertilization, recovery from these perturbations was rather slow, presumably because recovery was affected by long-term biotic interactions and species controls on ecosystem properties.", "keywords": ["0106 biological sciences", "Competition; Empetrum; Facilitation; Removal; Vaccinium", "15. Life on land", "01 natural sciences"], "contacts": [{"organization": "BRANCALEONI, Lisa, GERDOL, Renato,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1007/s11258-005-9020-4"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11258-005-9020-4", "name": "item", "description": "10.1007/s11258-005-9020-4", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11258-005-9020-4"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-08-25T00:00:00Z"}}, {"id": "10.1016/j.baae.2006.08.008", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-31T06:56:35Z", "type": "Journal Article", "created": "2007-02-21", "title": "Time-Scale Effects In The Interaction Between A Large And A Small Herbivore", "description": "

In the short term, grazing will mainly affect plant biomass and forage quality. However, grazing can affect plant species composition by accelerating or retarding succession at longer time-scales. Few studies concerning interactions among herbivores have taken the change in plant species composition into account. In a salt-marsh system, the longterm effects of exclusion of a large herbivore (cattle) on the abundance of a small herbivore (hare) were studied. Excluding cattle grazing for 30 years resulted in large changes in vegetation composition. In general, the cover of tall-growing species increased in the absence of cattle grazing. These long-term changes negatively affected hare grazing intensity. Hares preferentially fed on Festuca rubra and negatively selected tall growing plants, such as Elymus athericus, both in cattle-grazed and long-term ungrazed areas. However, the intensity of hare grazing was not related to the cover of F rubra. The cover of tall-growing plants (E athericus, A triplex prostrata and Juncus maritimus) appeared to be the best predictor and hare grazing intensity decreased sharply with an increase of the cover of tall plants. When cover of tall plants did not increase, hare grazing intensity was not affected. The study shows that the time-scale of the experiment is of prime importance in studying interactions between herbivores. Species that do not seem to influence the abundance of one another or are competing for the same resources on a short time-scale might well be facilitating each other when looking at larger time-scales while taking plant species replacement into account. (c) 2007 Gesellschaft fur Okologie. Published by Elsevier GrnbH. All rights reserved.

", "keywords": ["0106 biological sciences", "Lepus europaeus", "productivity", "SUCCESSION", "COMPETITION", "brown hares", "barnacle geese", "HARES LEPUS-EUROPAEUS", "BARNACLE GEESE", "01 natural sciences", "facilitation", "SALT-MARSH", "MANAGEMENT", "BROWN HARES", "tall plants", "2. Zero hunger", "exclosures", "15. Life on land", "FACILITATION", "succession", "communities", "salt marsh", "hares lepus-europaeus", "salt-marsh", "13. Climate action", "mountain hares", "MOUNTAIN HARES", "COMMUNITIES", "competition", "management"]}, "links": [{"href": "https://doi.org/10.1016/j.baae.2006.08.008"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Basic%20and%20Applied%20Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.baae.2006.08.008", "name": "item", "description": "10.1016/j.baae.2006.08.008", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.baae.2006.08.008"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2008-03-01T00:00:00Z"}}, {"id": "10.1016/j.foodpol.2010.11.009", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-31T06:57:01Z", "type": "Journal Article", "created": "2011-01-23", "title": "The New Competition For Land: Food, Energy, And Climate Change", "description": "Abstract The paper addresses the new competition for land arising from growing and changing demand for food when combined with increasing global demand for transport energy, under conditions of declining petro-chemical resources and the urgent need to reduce greenhouse gas emissions. The paper starts from the premise of a \u2018food, energy and environment trilemma\u2019 ( Tilman et al., 2009 ), where all demands to expand the area of cultivated land present high risks of increasing the carbon footprint of agriculture. Having reviewed the main drivers of demand for food and for liquid transport fuels, the paper weighs the controversies surrounding biofuels arising from food-price spikes, the demand for land, and consequent direct and indirect land-use change. It suggests that we need a more complex, and geographically differentiated, analysis of the interactions between direct and indirect land-use change. The paper then reviews evidence of land availability, and suggests that in addition to technical availability in terms of soil, water, and climate, political, social, and technological factors have significantly shaped the competition for land in different global regions, particularly the three major biofuel producing ones of the USA, Brazil and Europe. This point is further developed by reviewing the different innovation pathways for biofuels in these three regions. The main conclusion of this review is firstly that any analysis requires an integrated approach to the food-energy-environment trilemma, and secondly that strategic political direction of innovation and sustainability regulation are required to bring about major shifts in agriculture leading to sustainable intensification of cultivation ( Royal Society, 2009 ), rather than the continued expansion of cultivated area. The consequent perspective is one of considerable global variety in technologies, agricultural productive systems, and use of natural resources. This contrasts sharply with the world of a dominant global and integrated technology platform based on petro-chemicals to which we have become accustomed.", "keywords": ["2. Zero hunger", "330", "food", "0211 other engineering and technologies", "HM Sociology", "02 engineering and technology", "15. Life on land", "7. Clean energy", "630", "biofuels", "innovation", "12. Responsible consumption", "competition for land", "climate change", "13. Climate action", "11. Sustainability", "0202 electrical engineering", " electronic engineering", " information engineering"]}, "links": [{"href": "https://doi.org/10.1016/j.foodpol.2010.11.009"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Food%20Policy", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.foodpol.2010.11.009", "name": "item", "description": "10.1016/j.foodpol.2010.11.009", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.foodpol.2010.11.009"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-01-01T00:00:00Z"}}, {"id": "10.1016/j.eja.2008.07.003", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-05-31T06:56:49Z", "type": "Journal Article", "created": "2008-09-07", "title": "Competition For Nitrogen In An Unfertilized Intercropping System: The Case Of An Association Of Grapevine And Grass Cover In A Mediterranean Climate", "description": "Cover cropping is currently increasing in vineyards as it provides solutions to some of the problems encountered in vine growing. However, its development is still hampered in Mediterranean regions because of fears of severe competition for water. Recent studies have shown that soil resources other than water may also be restrictive, and particularly nitrogen. Over a three-year period, the effect of introducing a cover crop was studied with respect to the temporal and spatial changes to nitrogen dynamics in a Mediterranean vineyard. The experiment compared the impact of three different types of soil cover management on nitrogen dynamics, and particularly on soil nitrogen mineralization which is the principal source of inorganic nitrogen in situations with no application of N fertilizers which are frequent in viticulture. This experiment provided evidence that the presence of an intercrop significantly reduced nitrogen accumulation in aerial parts of grapevine during the year due to competition for soil resources. This reduction varied markedly between years and treatments, and was more pronounced during dry years. The competition for nitrogen was direct as intercrop deprived grapevine of soil nitrogen beneath the inter-row and caused grapevine uptake to be higher beneath the row. In deep soils, a grapevine can adapt its root system in order to access deeper water resources, but it then partially abandons the mineralization zone containing most inorganic nitrogen. Competition for nitrogen was less marked with a temporary cover crop than with a permanent one, because of the shorter period of uptake with the former and the time needed for an annual cover crop to develop its root system each year. Intercrop also competed indirectly for nitrogen with grapevine as it took up soil water and made inorganic nitrogen less mobile and accessible to grapevine. Intercrop markedly decreased soil nitrogen mineralization. Although it did not significantly affect organic matter characteristics or soil temperature, it clearly modified the water regime. Indeed, under either temporary or perennial cover crops, the upper soil layers dried more rapidly than when there was only evaporation from bare soil. Consequently, nitrogen mineralization decreased faster with intercropped treatments and halted prematurely during the summer. The earliness of the reduction in nitrogen accumulation in intercropped vineyards also suggested that a lower level of nitrogen transfer to perennial reserves was involved. Indeed, grass cover grows and competes for nitrogen during the autumn which is a favourable period for nitrogen accumulation in wood reserves. Although better water infiltration was observed in the presence of a cover crop (notably in the autumn), the favourable conditions for nitrogen mineralization were propitious for grass cover growth and uptake. Consequently, intercrop reduced grapevine growth of the year but also the potential growth for the next year by decreasing grapevine nitrogen perennial reserves", "keywords": ["[SDV.SA]Life Sciences [q-bio]/Agricultural sciences", "P33 - Chimie et physique du sol", "2. Zero hunger", "0106 biological sciences", "[SDV.SA] Life Sciences [q-bio]/Agricultural sciences", "STRESS", "550", "F08 - Syst\u00e8mes et modes de culture", "http://aims.fao.org/aos/agrovoc/c_8283", "WATER-NITROGEN INTERACTION", "COMPETITION", "NITROGEN BALANCE", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "http://aims.fao.org/aos/agrovoc/c_4188", "INTERCROPPING", "Vitis vinifera", "http://aims.fao.org/aos/agrovoc/c_3081", "http://aims.fao.org/aos/agrovoc/c_3910", "0401 agriculture", " forestry", " and fisheries", "culture intercalaire", "RELATION SOURCE-PUITS", "F04 - Fertilisation"]}, "links": [{"href": "https://doi.org/10.1016/j.eja.2008.07.003"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/European%20Journal%20of%20Agronomy", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.eja.2008.07.003", "name": "item", "description": "10.1016/j.eja.2008.07.003", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.eja.2008.07.003"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2009-01-01T00:00:00Z"}}, {"id": "10.1016/j.soilbio.2012.01.012", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-05-31T06:57:45Z", "type": "Journal Article", "created": "2012-02-03", "title": "Alleviation Of P Limitation Makes Tree Roots Competitive For N Against Microbes In A N-Saturated Conifer Forest: A Test Through P Fertilization And N-15 Labelling", "description": "Chronic N deposition to forests may induce N saturation and stand decline, leading to reduced ecosystem N retention capacity, triggered by a shift from N limitation of trees to limitation by another nutrient. We conducted a 15N soil labelling experiment in non-fertilized and P-fertilized plots at two elevations in an N-saturated Mediterranean-fir (Abies pinsapo) forest in southern Spain which shows P limitation symptoms. Root-exclusion was applied to identify the relative contributions of roots (plus mycorrhizal fungi) uptake, and heterotrophic immobilization by free-living microbes, to N retention. Overall 15N recovery from the litter, 0\u201315-cm soil and root-uptake components was c.a. 35% higher in P-fertilized than in non-fertilized plots at both elevations. In non-fertilized plots, soil was the biggest sink for added 15N. Phosphorus fertilization increased the competitive ability of tree roots for soil N resulting in equal importance of the autotrophic (roots plus associated mycorhizal fungi) and heterotrophic (free-living microbes) components with respect to total 15N recovery in P-fertilized plots. Phosphorus addition increased litter and soil N immobilization only if roots had been excluded. By combining in situ fertilization, root-exclusion and isotope labelling we have demonstrated that reduced N retention capacity and dominance of soil microbial over plant immobilization in a N-saturated forest results from a shift from N to P limitation of trees, while alleviation of P limitation makes tree roots and associated mycorrhizal fungi competitive for N against free soil microorganisms.", "keywords": ["2. Zero hunger", "0106 biological sciences", "N saturation", "vector analysis of foliar nutrients", "N uptake", "plant-microbe competition", "P limitation and deficiency", "04 agricultural and veterinary sciences", "15. Life on land", "N/P relationships", "01 natural sciences", "P fertilization", "0401 agriculture", " forestry", " and fisheries", "plant-soil interactions"]}, "links": [{"href": "https://doi.org/10.1016/j.soilbio.2012.01.012"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20Biology%20and%20Biochemistry", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.soilbio.2012.01.012", "name": "item", "description": "10.1016/j.soilbio.2012.01.012", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.soilbio.2012.01.012"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-05-01T00:00:00Z"}}, {"id": "10.1016/j.soilbio.2014.06.021", "type": "Feature", "geometry": null, "properties": {"license": "Restricted", "updated": "2026-05-31T06:57:47Z", "type": "Journal Article", "created": "2014-07-03", "title": "Disturbance-Diversity Relationships For Soil Fauna Are Explained By Faunal Community Biomass In A Salt Marsh", "description": "Disturbance-diversity relationships have long been studied in ecology with a unimodal relationship as the key prediction. Although this relationship has been widely contested, it is rarely tested for soil invertebrate fauna, an important component of terrestrial biodiversity. We tested disturbance-diversity relationships for soil meso- and macrofauna in a salt marsh where periodic sea water inundation and cattle grazing occur as stressors. We hypothesized a unimodal inundation frequency-diversity relationship, whereas we expected grazing to overrule the effects of inundation frequency due to its large effects on the habitat of soil fauna. We found a negative relationship between inundation frequency and diversity at the ungrazed sites and no relationship at the grazed sites. Moreover, we found a negative relationship between community biomass and diversity for soil fauna that may have caused this negative disturbance-diversity relationship. Community biomass at the intermediate inundation frequency increased due to the dominance of Orchestia gammarellus (a macro-detritivore species), which could exploit low quality litters at the ungrazed sites. We highlight that the negative relationship between faunal community biomass and faunal diversity may influence disturbance-diversity relationships and illustrate that total biomass distribution of feeding guilds of soil fauna can improve our understanding of the soil fauna response to stressors in salt marshes. \u00a9 2014 Elsevier Ltd.", "keywords": ["COLLEMBOLA", "DYNAMICS", "0106 biological sciences", "Salt marsh", "productivity", "Feeding guilds", "SUCCESSION", "COMPETITION", "01 natural sciences", "COEXISTENCE", "RICHNESS", "patterns", "SDG 14 - Life Below Water", "14. Life underwater", "Orchestia gammarellus", "INTERMEDIATE DISTURBANCE", "Intermediate disturbance hypothesis", "PRODUCTIVITY", "coexistence", "SPECIES-DIVERSITY", "collembola", "Soil invertebrate fauna", "dynamics", "intermediate disturbance", "15. Life on land", "succession", "species-diversity", "PATTERNS", "competition", "richness"]}, "links": [{"href": "https://doi.org/10.1016/j.soilbio.2014.06.021"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20Biology%20and%20Biochemistry", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.soilbio.2014.06.021", "name": "item", "description": "10.1016/j.soilbio.2014.06.021", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.soilbio.2014.06.021"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-11-01T00:00:00Z"}}, {"id": "10.1023/a:1006288301044", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-05-31T06:58:16Z", "type": "Journal Article", "created": "2002-12-22", "title": "Alley Cropping Of Maize With Calliandra And Leucaena In The Subhumid Highlands Of Kenya: Part 1. Soil-Fertility Changes And Maize Yield", "description": "Although N-rich leaf biomass of multipurpose trees is known to be a good source of N to crops, integrating such trees into crop production systems is a major challenge in the development of viable agroforestry systems. An approach to integrating calliandra (Calliandra calothyrsus Meissner) and leucaena (Leucaena leucocephala (Lam.) de Wit), two promising agroforestry tree species, into maize (Zea mays L.) production system was investigated in the subhumid highlands of central Kenya during four maize-growing seasons from 1994 to 1996. The experiment consisted of maize plots to which tree prunings obtained from hedgerows grown either in situ (alley cropping) or ex situ (biomass transfer from outside) were applied. When alley-cropped with leucaena, maize produced significantly higher yields compared to maize monoculture (both non-fertilized and fertilized) treatments, but when alley-cropped with calliandra, the yield of maize was less than that of the monocropped unfertilized control. Application of ex situ grown calliandra and leucaena prunings with or without fertilizer resulted in higher maize grain yield than in the nonfertilized and fertilized treatments. Yields of calliandra alley- cropped maize were 11% to 51% lower than those of nonalley-cropped treatments receiving calliandra prunings from ex situ grown trees; the decrease was 2% to 17% with leucaena, indicating that calliandra hedges were more competitive than leucaena hedges. The alley-cropped prunings-removed treatments produced the lowest maize yields. The study showed that, in the subhumid tropical highlands of Kenya, inclusion of calliandra hedges on cropland adversely affected maize yields. On the other hand, alley cropping with leucaena was advantageous.", "keywords": ["580", "2. Zero hunger", "571", "prunings", "biomass transfer", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "crop yield", "15. Life on land", "competition"]}, "links": [{"href": "https://doi.org/10.1023/a:1006288301044"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agroforestry%20Systems", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1023/a:1006288301044", "name": "item", "description": "10.1023/a:1006288301044", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1023/a:1006288301044"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1999-06-01T00:00:00Z"}}, {"id": "10.1046/j.1365-2745.1998.00278.x", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-05-31T06:58:41Z", "type": "Journal Article", "created": "2003-05-21", "title": "An Experimental Test Of Limits To Tree Establishment In Arctic Tundra", "description": "

1 Five treeline species had low seed germination rates and low survivorship and growth of seedlings when transplanted into Alaskan tundra. Seed germination of all species increased with experimental warming, suggesting that the present treeline may in part result from unsuccessful recruitment under cold conditions.

2 Growth, biomass and survivorship of seedlings of treeline species transplanted into tundra were largely unaffected by experimental warming. However, transplanted seedlings of three species (Betula papyrifera, Picea glauca and Populus tremuloides) grew more when below\uffe2\uff80\uff90ground competition with the extant community was reduced. All three measures of transplant performance were greater in shrub tundra than in the less productive tussock or heath tundra. Establishment of trees in tundra may thus be prevented by low resource availability and competition.

3 Two species (Alnus crispa and Populus balsamifera) had low seed germination and survivorship of germinated seeds; transplants of these species did not respond to the manipulations and lost biomass following transplanting into tundra. Isolated populations of these two species north of the present treeline in arctic Alaska probably became established during mid\uffe2\uff80\uff90Holocene warming rather than in recent times.

4 Of all the species studied here, Picea glauca was the most likely to invade intact upland tundra. Its seeds had the highest germination rates and it was the only species whose seedlings survived subsequently. Furthermore, transplanted seedlings of Picea glauca had relatively high survivorship and positive growth in tundra, especially in treatments that increased air temperature or nutrient availability, two factors likely to increase with climate warming.

", "keywords": ["0106 biological sciences", "nutrient-availability", "air-temperature", "tundra", "-Alaska", "Betulaceae-: Dicotyledones-", "Arctic-tundra", "Coniferopsida-: Gymnospermae-", "natural-regeneration", "Environmental-Sciences)", "growth-", "01 natural sciences", "seedlings-", "Picea-glauca", "Betula-papyrifera", "tundra-", "soil-fertility", "Salicaceae-: Dicotyledones-", "Spermatophyta-", "treelines-", "Plantae-", "USA", "tree-establishment", "resource-availability", "Climatology- (Environmental-Sciences)", "Populus-balsamifera (Salicaceae-): seedling-", "Angiosperms-", "transplanting-", "Angiospermae-", "15. Life on land", "Plant-ecology:-communities", "Populus-balsamifera", "Betula-papyrifera (Betulaceae-): seedling-", "Populus-tremuloides", "climate-", "interspecific-competition", "germination", "Populus-tremuloides (Salicaceae-): seedling-", "Terrestrial-Ecology (Ecology-", "Picea-glauca (Coniferopsida-): seedling-", "Dicots-", "seed-germination", "Alnus-crispa", "plant-competition", "Alnus-crispa (Betulaceae-): seedling-", "survival-", "establishment-"]}, "links": [{"href": "https://doi.org/10.1046/j.1365-2745.1998.00278.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1046/j.1365-2745.1998.00278.x", "name": "item", "description": "10.1046/j.1365-2745.1998.00278.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1046/j.1365-2745.1998.00278.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1998-06-01T00:00:00Z"}}, {"id": "10.1080/15324980601074545", "type": "Feature", "geometry": null, "properties": {"license": "unspecified", "updated": "2026-05-31T06:59:03Z", "type": "Journal Article", "created": "2006-12-29", "title": "Contour Hedgerows And Grass Strips In Erosion And Runoff Control On Sloping Land In Semi-Arid Kenya", "description": "Most early alley cropping studies in semi-arid Kenya were on fairly flat land while there is an increase in cultivated sloping land. The effectiveness of aging contour hedgerows and grass strips for erosion control on an about 15% slope of an Alfisol was compared. The five treatments were Senna siamea hedgerows with tree prunings applied as mulch to crops (H\u00a0+\u00a0M), hedgerows with crops with prunings removed (H), mulch only applied to crops (M), crops with Panicum maximum grass strips (G), and a sole crop control of a rotation of maize (Zea mays) and cowpea (Vigna unguiculata). Cumulative results for four consecutive seasons showed that most successful treatment H\u00a0+\u00a0M reduced soil loss from just over 100 to only 2\u00a0Mg\u00a0ha\u22121 (or t\u00a0ha\u22121) and runoff from just below 100 to 20\u00a0mm as compared to the sole crop control C. Grass strips were less effective (15\u00a0Mg\u00a0ha\u22121 and 46\u00a0mm, respectively). Cumulative maize yields (1993\u20131995) were reduced by 35% in H\u00a0+\u00a0M, 55% in H, and by more than 60% in G. Generally, the M plot pr...", "keywords": ["2. Zero hunger", "0106 biological sciences", "Soil protection", "Water conservation", "04 agricultural and veterinary sciences", "15. Life on land", "Resource competition", "01 natural sciences", "Maize", "Senna siamea", "Cowpea", "0401 agriculture", " forestry", " and fisheries", "Land degradation", "Agroforestry", "Panicum maximum"], "contacts": [{"organization": "Kinama, J.M., Stigter, C.J., Ong, C.K., Ng'ang'a, J.K., Gichuki, F.N.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1080/15324980601074545"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Arid%20Land%20Research%20and%20Management", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1080/15324980601074545", "name": "item", "description": "10.1080/15324980601074545", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1080/15324980601074545"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2007-01-01T00:00:00Z"}}, {"id": "10.1111/1365-2745.12959", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-05-31T06:59:21Z", "type": "Journal Article", "created": "2018-04-16", "title": "Intransitive competition is common across five major taxonomic groups and is driven by productivity, competitive rank and functional traits", "description": "Abstract

Competition can be fully hierarchical or intransitive, and this degree of hierarchy is driven by multiple factors, including environmental conditions, the functional traits of the species involved or the topology of competition networks. Studies simultaneously analysing these drivers of competition hierarchy are rare. Additionally, organisms compete either directly or via interference competition for resources or space, within a local neighbourhood or across the habitat. Therefore, the drivers of competition could change accordingly and depend on the taxa studied.

We performed the first multi\uffe2\uff80\uff90taxon study on pairwise competition across major taxonomic groups, including experiments with vascular plants, mosses, saprobic fungi, aquatic protists and soil bacteria. We evaluated how general is competition intransitivity from the pairwise competition matrix including all species and also for each possible three\uffe2\uff80\uff90species combination (triplets). We then examined which species were likely to engage in competitive loops and the effects of environmental conditions, competitive rank and functional traits on intransitive competition.

We found some degree of competition intransitivity in all taxa studied, with 38% to 5% of triplets being intransitive. Variance in competitive rank between species and more fertile conditions strongly reduced intransitivity, with triplets composed of species differing widely in their competitive ranks much less likely to be intransitive.

Including functional traits of the species involved more than doubled the variation explained compared to models including competitive rank only. Both trait means and variance within triplets affected the odds of them being intransitive. However, the traits responsible and the direction of trait effects varied widely between taxa, suggesting that traits can have a wide variety of effects on competition.

Synthesis. We evaluated the drivers of competition across multiple taxa and showed that productivity and competitive rank are fundamental drivers of intransitivity. We also showed that not only the functional traits of each species, but also those of the accompanying species, determine competition intransitivity. Intransitive competition is common across multiple taxa but can dampen under fertile conditions or for those species with large variance in their competitive abilities. This provides a first step towards predicting the prevalence of intransitive competition in natural communities.

Very little is known about how variation in environmental conditions alters the strength and the structure of competitive networks and what are the consequences of this for species coexistence.

We performed a competition experiment with 10 annual plant species to parameterise a population model describing species\uffe2\uff80\uff99 dynamics according to their vital rates and pairwise competitive coefficients. Seeds from all species were sown under two different climatic scenarios: (1) right before the first major storm of the growing season and (2) after an imposed fall drought of 2\uffc2\uffa0months simulating an extreme climatic event of intense aridity.

Species\uffe2\uff80\uff99 demography and competitive responses were used to estimate pairwise stabilising niche differences and average fitness differences. In addition, we used tools from network theory to characterise the structure of multispecies competition from the determinants of species coexistence. Specifically, we evaluated changes in competitive dominance between species pairs, and the prevalence of intransitive competitive relationships for 120 triplets between these two climatic events.

The experimental extreme event significantly reduced fitness differences between species pairs. Such an equalising mechanism promotes coexistence. However, niche differences were also reduced in such a way that the number of species pairs whose niche differences overcame their fitness differences was reduced from six to two.

Contrary to our expectations, the extreme event did not increase the hierarchy of competitive dominance. Instead, and depending on the technique used, the prevalence of intransitivity remained marginally similar (17% to 22%) or significantly increased from 19.4% to 29.8%. This pattern was likely a consequence of the significant changes in competitive dominance between species pairs (26 changes out of 45; 58%).

Although fitness differences were equalised and intransitive competition promoted, our model predicted a lower likelihood of coexistence under the extreme event for both species pairs and triplets, mainly because competitive interactions did not promote enough niche differences to balance the observed fitness asymmetries in our competitive networks.

Synthesis. We empirically proved that an extreme climate results in communities with reduced niche and fitness differences in which species are less likely to coexist despite the increasing prevalence of intransitive competition.

", "keywords": ["Annual plants", "2. Zero hunger", "0106 biological sciences", "Competition", "Drought", "15. Life on land", "01 natural sciences", "6. Clean water", "Intransitive competition", "13. Climate action", "Fitness", "Niche", "Stabilising mechanisms", "Environmental filtering"]}, "links": [{"href": "https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.12962"}, {"href": "https://doi.org/10.1111/1365-2745.12962"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/1365-2745.12962", "name": "item", "description": "10.1111/1365-2745.12962", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/1365-2745.12962"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-04-16T00:00:00Z"}}, {"id": "10.1111/1365-2745.13028", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-31T06:59:21Z", "type": "Journal Article", "created": "2018-08-14", "title": "A competition-defence trade-off both promotes and weakens coexistence in an annual plant community", "description": "Abstract

Competition\uffe2\uff80\uff93defence trade\uffe2\uff80\uff90offs have long been thought to promote plant coexistence and increase species diversity. However, insights from modern coexistence theory clarify that such trade\uffe2\uff80\uff90offs alone cannot sustain coexistence. Coexistence also requires stabilising niche differences and the ability of competitor populations to persist under consumer pressure. Despite the breadth of potential consequences of competition\uffe2\uff80\uff93defence trade\uffe2\uff80\uff90offs, we have little mechanistic understanding of how they affect diversity in natural communities.

We investigated the effects of seed harvesting by ants on coexistence in an annual plant community. We parameterised a model of plant competitive population dynamics with data from two field experiments: (a) plant demographic rates and competition coefficients determined by growing plants alone and against intra\uffe2\uff80\uff90 and interspecific competitor density gradients; (b) plant fitness losses to ant consumers determined by measuring seed removal from experimental depots. We tested for a trade\uffe2\uff80\uff90off between a plant species\uffe2\uff80\uff99 demographic potential and its susceptibility to consumption and then determined the bounds of ant effects on pairwise and multispecies coexistence by comparing model projections with and without seed consumption.

Ants harvested seeds of all plant species, but they strongly preferred the competitively superior large seeded species, inducing a competition\uffe2\uff80\uff93defence trade\uffe2\uff80\uff90off. Unequal seed loss to ants changed competition\uffe2\uff80\uff90based fitness hierarchies, affecting both the number and identities of plant species pairs that were predicted to coexist compared to a scenario without ants. The trade\uffe2\uff80\uff90off most often prevented coexistence by severely disadvantaging the superior competitor or excluding species directly through overconsumption, and a simulated reduction in the overall consumption rate opened few additional opportunities for coexistence. Ant exacerbation of average fitness differences was particularly disruptive to multispecies coexistence, where niche differences were insufficient to stabilise the coexistence of plant triplets and quadruplets.

Synthesis. Our results show that the presence of a competition\uffe2\uff80\uff93defence trade\uffe2\uff80\uff90off in a community with stabilising niche differences does not always increase diversity. Instead, the full range of diversity outcomes\uffe2\uff80\uff94positive and negative changes in species number and changes in the identity of the dominant\uffe2\uff80\uff94are possible. Taken together, our results support the emerging paradigm that consumers have wide\uffe2\uff80\uff90ranging impacts on plant diversity and suggest that variation in consumer pressure may be an important driver of large\uffe2\uff80\uff90scale diversity patterns.

", "keywords": ["Annual plants", "0106 biological sciences", "2. Zero hunger", "Seed depot", "Competition", "Competition\u2013defence trade-off", "Harvester ant", "15. Life on land", "Granivory", "01 natural sciences", "Coexistence", "Fitness hierarchy"]}, "links": [{"href": "https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.13028"}, {"href": "https://doi.org/10.1111/1365-2745.13028"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/1365-2745.13028", "name": "item", "description": "10.1111/1365-2745.13028", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/1365-2745.13028"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-08-13T00:00:00Z"}}, {"id": "10.1111/1365-2745.13040", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-05-31T06:59:21Z", "type": "Journal Article", "created": "2018-08-14", "title": "Biotic controls of plant coexistence", "description": "Abstract

The quest for understanding the maintenance of species diversity has matured in recent decades under the umbrella of species coexistence theory, founded by Chesson (2000). The central conclusion of the theory is that coexistence at local scales depends on two opposing forces: average fitness differences between species, which drive the best\uffe2\uff80\uff90adapted species to exclude others, and stabilizing mechanisms, which promote diversity via niche differentiation.

Recent theoretical work has focussed on how interactions between plants and other organisms influence the equalizing and stabilizing forces. However, there is a lack of empirical information. Therefore, the next fundamental step is to assess the prevalence of these mechanisms for controlling plant coexistence across a wide range of interactions and systems.

To that end, this special feature presents 10 theoretical, observational, or manipulative studies illustrating 9 different biotic interactions including mutualisms (pollinators, seed dispersers, soil microbes, and arbuscular mycorrhizal fungi) and antagonisms (leaf and seed herbivores, and leaf and root pathogens). All studies share a common question: how biotic interactions regulate plant coexistence?

Comparisons across studies suggest that biotic interactions modify both stabilizing and average fitness differences. In those cases where biotic interactions promote stable coexistence between plant species, both mutualistic and antagonistic interactions act more frequently as an equalizing rather than as a stabilizing mechanisms.

Besides these generalities, the studies of this special issue also present novel theoretical and empirical approaches to better understand the maintenance of species diversity over a wide variety of systems, environmental conditions, and organisms.

Synthesis. The studies presented here constitutes a solid base to empirically explore how mutualistic and antagonistic interactions act upon the determinants of plant species competition, and open novel paths for future research. Collectively, these advances will serve to pave the road for a better theoretical and empirical understanding of how biotic interactions control biodiversity.

", "keywords": ["2. Zero hunger", "0106 biological sciences", "Multitrophic interactions", "Antagonisms", "Fitness", "Niche", "Apparent competition", "Mutualisms", "15. Life on land", "01 natural sciences"]}, "links": [{"href": "https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/1365-2745.13040"}, {"href": "https://doi.org/10.1111/1365-2745.13040"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/1365-2745.13040", "name": "item", "description": "10.1111/1365-2745.13040", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/1365-2745.13040"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-08-13T00:00:00Z"}}, {"id": "10.1111/1462-2920.13956", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-05-31T06:59:22Z", "type": "Journal Article", "created": "2017-10-13", "title": "Type VI secretion systems in plant-associated bacteria", "description": "Summary

The type VI secretion system (T6SS) is a bacterial nanomachine used to inject effectors into prokaryotic or eukaryotic cells and is thus involved in both host manipulation and interbacterial competition. The T6SS is widespread among Gram\uffe2\uff80\uff90negative bacteria, mostly within the Proteobacterium Phylum. This secretion system is commonly found in commensal and pathogenic plant\uffe2\uff80\uff90associated bacteria. Phylogenetic analysis of phytobacterial T6SS clusters shows that they are distributed in the five main clades previously described (group 1\uffe2\uff80\uff935). The even distribution of the system among commensal and pathogenic phytobacteria suggests that the T6SS provides fitness and colonization advantages in planta and that the role of the T6SS is not restricted to virulence. This manuscript reviews the phylogeny and biological roles of the T6SS in plant\uffe2\uff80\uff90associated bacteria, highlighting a remarkable diversity both in terms of mechanism and function.

", "keywords": ["PROTEIN SECRETION", "0301 basic medicine", "570", "VIBRIO-CHOLERAE", "PATHOGENIC BACTERIA", "Microbiology", "03 medical and health sciences", "Bacterial Proteins", "Proteobacteria", "Phylogeny", "Plant Diseases", "2. Zero hunger", "0303 health sciences", "Science & Technology", "Virulence", "PSEUDOMONAS-AERUGINOSA", "Minireviews", "Plants", "Type VI Secretion Systems", "IN-SILICO ANALYSIS", "AGROBACTERIUM-TUMEFACIENS", "INTERBACTERIAL COMPETITION", "GENOMIC ANALYSIS", "EFFECTORS", "VIRULENCE", "Life Sciences & Biomedicine", "0605 Microbiology"]}, "links": [{"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1111/1462-2920.13956"}, {"href": "https://doi.org/10.1111/1462-2920.13956"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Microbiology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/1462-2920.13956", "name": "item", "description": "10.1111/1462-2920.13956", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/1462-2920.13956"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-11-10T00:00:00Z"}}, {"id": "10.1111/gcb.15585", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-05-31T06:59:29Z", "type": "Journal Article", "created": "2021-03-24", "title": "Agricultural intensification and climate change have increased the threat from weeds", "description": "Abstract

Weeds represent a significant threat to crop yields and global food security. We analysed data on weed competition from the world's longest running agricultural experiment to ask whether potential yield losses from weeds have increased in response to management and environmental change since the advent of the Green Revolution in the 1960s. On plots where inorganic nitrogen fertiliser has been applied, potential yield losses from weeds have consistently increased since 1969. This was explained by a warming climate, measured as air temperature averaged over the growing season for the weeds, and a shift towards shorter crop cultivars. Weeds also reduced yield proportionally more on plots with higher rates of nitrogen which had higher yields when weeds were controlled; the relative benefit of herbicides was, therefore, proportional to potential crop yield. Reducing yield losses from weed competition is increasingly challenging because of the evolution of herbicide resistance. Our results demonstrate that weeds now represent a greater inherent threat to crop production than before the advent of herbicides and integrated, sustainable solutions to weed management are urgently needed to protect the high yield potential of modern crop genotypes.

", "keywords": ["Crops", " Agricultural", "2. Zero hunger", "Herbicides", "Climate Change", "Weed Control", "Weed competition", "Plant Weeds", "Integrated weed management", "04 agricultural and veterinary sciences", "15. Life on land", "Primary Research Articles", "7. Clean energy", "13. Climate action", "Climate change", "0401 agriculture", " forestry", " and fisheries", "Crop yield", "Herbicide Resistance"]}, "links": [{"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.15585"}, {"href": "https://doi.org/10.1111/gcb.15585"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Change%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/gcb.15585", "name": "item", "description": "10.1111/gcb.15585", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/gcb.15585"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-03-23T00:00:00Z"}}, {"id": "10.1111/jvs.12317", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-05-31T06:59:51Z", "type": "Journal Article", "created": "2015-06-24", "title": "Large Herbivores Change The Direction Of Interactions Within Plant Communities Along A Salt Marsh Stress Gradient", "description": "AbstractQuestion

How multiple abiotic stress factors combined with herbivory affect interactions within plant communities is poorly understood. We ask how large herbivore grazing affects the direction of plant\uffe2\uff80\uff93plant interactions along an environmental gradient in a salt marsh.

Location

Grazed (cattle) and ungrazed salt marshes of the Dutch Wadden Sea island Schiermonnikoog. Here, patches of tall plant communities, dominated by the tough, unpalatable species Juncus maritimus Lam., are found alternating with low\uffe2\uff80\uff90statured, intensively grazed plant communities.

Methods

Along the inundation gradient, we measured plant species composition and plant species traits (specific leaf area, specific root length, maximum height and abundance) inside and outside J.\uffc2\uffa0maritimus patches in grazed and ungrazed areas. In addition, we measured soil structure parameters (bulk density, soil porosity, clay depth), multiple limiting conditions for plant growth (soil salinity, soil redox, plant canopy light interception), plant biomass, presence of herbivores and abundance of soil macro\uffe2\uff80\uff90detritivores.

Results

Under grazing, the palatable grasses Elytrigia atherica (Link) Kergu\uffc3\uffa9len and Festuca rubra L. were positively associated with J.\uffc2\uffa0maritimus, while shade\uffe2\uff80\uff90intolerant Puccinellia maritima (Huds.) Parl. and Juncus gerardii\uffc2\uffa0 Loisel. were negatively associated with this species. Furthermore, macro\uffe2\uff80\uff90detritivore presence was higher inside J.\uffc2\uffa0maritimus patches. In ungrazed areas E.\uffc2\uffa0atherica and F.\uffc2\uffa0rubra were negatively associated with J.\uffc2\uffa0maritimus, while P.\uffc2\uffa0maritima and J.\uffc2\uffa0gerardii were rare. In both grazed and ungrazed conditions the directions of species associations were independent of the inundation gradient. Analysis of species traits and abiotic conditions suggested that associational resistance (a facilitation type) was important in grazed areas. In ungrazed areas, light competition was the likely dominant process.

Conclusions

The direction of species associations within these salt marsh communities was strongly affected by grazing, not by the underlying stress gradient. Measurement of species traits indicated that plant\uffe2\uff80\uff93plant interactions shifted from competitive to facilitative under grazing. Besides grazing, cross\uffe2\uff80\uff90trophic facilitation of soil disturbing macro\uffe2\uff80\uff90detritivores may play an important \uffe2\uff80\uff93 thus far ignored \uffe2\uff80\uff93 role in structuring plant communities.

", "keywords": ["Plant traits", "2. Zero hunger", "0106 biological sciences", "Salt marsh", "Macro-detritivores", "SUCCESSION", "Stress gradient hypothesis", "PREDICTIONS", "COMPETITION", "HALOPHYTES", "15. Life on land", "ALKALI GRASSLANDS", "FACILITATION", "01 natural sciences", "POSITIVE SPECIES INTERACTIONS", "Grazing", "Plant-plant interactions", "FUNCTIONAL TRAITS", "Trampling", "Orchestia gammarellus Pallas. 1766", "BIOTURBATION", "Facilitation", "Juncus maritimus Lam.", "VEGETATION", "Multiple stressors"]}, "links": [{"href": "https://doi.org/10.1111/jvs.12317"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Vegetation%20Science", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/jvs.12317", "name": "item", "description": "10.1111/jvs.12317", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/jvs.12317"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-06-24T00:00:00Z"}}, {"id": "10.1111/wre.12452", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-05-31T06:59:56Z", "type": "Journal Article", "created": "2020-11-06", "title": "Influence of intra\u2010row cruciferous surrogate weed growth on crop yield in organic spring cereals", "description": "Abstract

In Northern Europe, inter\uffe2\uff80\uff90row hoeing has become a popular tactic for controlling weeds in organic cereals. Hoeing is highly effective and can be implemented from crop emergence until stem elongation to maintain a nearly weed\uffe2\uff80\uff90free inter\uffe2\uff80\uff90row zone. However, hoeing has a lesser effect on weeds growing in the intra\uffe2\uff80\uff90row zone, where crop\uffe2\uff80\uff93weed proximity results in heightened competition. In the hoed cereal system, it is investigated whether tall\uffe2\uff80\uff90growing, competitive, cruciferous weeds in the intra\uffe2\uff80\uff90row zone affect crop biomass, yield and thousand kernel weight (TKW). An additive experimental design is employed to enable the fitting of rectangular hyperbolas, describing and quantifying the effects of increasing intra\uffe2\uff80\uff90row surrogate weed density on crop growth parameters. Regressions were studied under the influence of crop (spring barley and spring wheat), row spacing (narrow [12.5 or 15.0\uffc2\uffa0cm] and wide [25.0\uffc2\uffa0cm]) and nitrogen rate (50 and 100\uffc2\uffa0kg NH4\uffe2\uff80\uff90N/ha). Cruciferous surrogate weeds were found to impact crop yield and quality severely. For example, ten intra\uffe2\uff80\uff90row plants/m2 of surrogate weed Sinapis alba reduced grains yields by 7%\uffe2\uff80\uff9314% in spring barley and by 7%\uffe2\uff80\uff9332% in spring wheat with yield losses becoming markedly greater in wheat compared to barley as weed density increases. Compared to wheat, barley limited yield and quality losses and suppressed intra\uffe2\uff80\uff90row weed growth more. Row spacing did not have a consistent effect on crop or weed parameters; in one of six experiments, the 25\uffc2\uffa0cm row spacing reduced yields and increased intra\uffe2\uff80\uff90row weed biomass in wheat. Nitrogen rate did not affect crop or weed parameters. Results warrant the implementation of additional tactics to control intra\uffe2\uff80\uff90row weeds and limit crop losses.

", "keywords": ["2. Zero hunger", "Hordeum vulgare L.", "thousand kernel weight", "nitrogen rate", "Hordeum vulgare L.", " Triticum aestivum L.", " inter-row hoeing", " nitrogen rate", " inter-row spacing", " thousand kernel weight", " crop-weed competition.", "0401 agriculture", " forestry", " and fisheries", "crop", "Weed management", "04 agricultural and veterinary sciences", "weed competition", "inter-row hoeing", "inter-row spacing", "Triticum aestivum L."]}, "links": [{"href": "https://doi.org/10.1111/wre.12452"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Weed%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/wre.12452", "name": "item", "description": "10.1111/wre.12452", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/wre.12452"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-11-05T00:00:00Z"}}, {"id": "10.2307/3237009", "type": "Feature", "geometry": null, "properties": {"license": "Restricted", "updated": "2026-05-31T07:01:18Z", "type": "Journal Article", "created": "2007-02-03", "title": "Effects Of Nutrients And Shade On Tree-Grass Interactions In An East African Savanna", "description": "

Abstract. Savanna trees have a multitude of positive and negative effects on understorey grass production, but little is known about how these effects interact. We report on a fertilization and shading experiment carried out in a Tanzanian tropical dry savanna around Acacia tortilis trees. In two years of study there was no difference in grass production under tree canopies or in open grassland. Fertilization, however, indicate that trees do affect the nutrient limitation of the grass layer with an N\uffe2\uff80\uff90limited system in open grassland to a P\uffe2\uff80\uff90limited system under the trees. The N:P ratios of grass gave a reliable indication of the nature of nutrient limitation, but only when assessed at the end of the wet season. Mid\uffe2\uff80\uff90wet season nutrient concentrations of grasses were higher under than outside the tree canopy, suggesting that factors other than nutrients limit grass production. A shading experiment indicated that light may be such a limiting factor during the wet season when water and nutrients are sufficiently available. However, in the dry season when water is scarce, the effect of shade on plant production became positive. We conclude that whether trees increase or decrease production of the herbaceous layer depends on how positive effects (increased soil fertility) and negative effects (shade and soil water availability) interact and that these interactions may significantly change between wet and dry seasons.

", "keywords": ["2. Zero hunger", "0106 biological sciences", "productivity", "growth", "04 agricultural and veterinary sciences", "15. Life on land", "herbivores", "01 natural sciences", "nitrogen", "kenya", "vegetation", "limitation", "0401 agriculture", " forestry", " and fisheries", "light-intensity", "competition", "environments"]}, "links": [{"href": "https://doi.org/10.2307/3237009"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Vegetation%20Science", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.2307/3237009", "name": "item", "description": "10.2307/3237009", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.2307/3237009"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2001-02-24T00:00:00Z"}}, {"id": "10.3389/fpls.2022.801343", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-05-31T07:01:33Z", "type": "Journal Article", "created": "2022-07-14", "title": "Belowground Root Competition Alters the Grass Seedling Establishment Response to Light by a Nitrogen Addition and Mowing Experiment in a Temperate Steppe", "description": "

Predicting species responses to climate change and land use practices requires understanding both the direct effects of environmental factors as well as the indirect effects mediated by changes in belowground and aboveground competition. Belowground root competition from surrounding vegetation and aboveground light competition are two important factors affecting seedling establishment. However, few studies have jointly examined the effect of belowground root and light competition on seedling establishment, especially under long-term nitrogen addition and mowing. Here, we examined how belowground root competition from surrounding vegetation and aboveground light competition affect seedling establishment within a long-term nitrogen addition and mowing experiment. Seedlings of two grasses (Stipa krylovii and Cleistogenes squarrosa) were grown with and without belowground root competition under control, nitrogen addition, and mowing treatments, and their growth characteristics were monitored. The seedlings of the two grasses achieved higher total biomass, height, mean shoot and root mass, but a lower root/shoot ratio in the absence than in the presence of belowground root competition. Nitrogen addition significantly decreased shoot biomass, root biomass, and the survival of the two grasses. Regression analyses revealed that the biomass of the two grass was strongly negatively correlated with net primary productivity under belowground root competition, but with the intercept photosynthetic active radiation in the absence of belowground root competition. This experiment demonstrates that belowground root competition can alter the grass seedling establishment response to light in a long-term nitrogen addition and mowing experiment.

In this study, a typical apple\u2013soybean intercropping system was used to analyze the effects of different soil water and heat regulation modes on the spatial distribution of the soil water content (SWC), photosynthetic physiological characteristics, and growth. Three maximum irrigation levels [50% (W1), 65% (W2), and 80% (W3) of field capacity (FC)] and two mulching intervals [from seedling to podding stage (M1) and during the full stage (M2) of soybeans] were tested. The results showed that the SWC of W3M2 was the highest, while the W2M1 and W1M2 treatments used more deep soil water. Irrigation increased the chlorophyll content, net photosynthesis, and transpiration rate of leaves in the agroforestry system. In addition, the net photosynthetic rate of leaves under the W2 irrigation level increased after mulch removal in the later growth stage. At W1 and W2 irrigation levels, the soybean yield of half-stage mulching was 0.85\u201315.49% higher than that of full-stage mulching. Multiple regression analysis showed that grain yield under the W3M2 treatment reached the maximum value of the fitting equation. The photosynthetic rate, water use efficiency, and grain yield under W2M1 reached 71\u201386% of the maximum value of the fitting equation, with the largest soil plant analysis development value. To effectively alleviate water competition in the apple\u2013soybean intercropping system, our results suggest adoption of the 80% FC upper irrigation limit (W3) combined with soybean M2 treatment in young apple trees\u2013soybean intercropping system during water abundant years. In addition, adoption of the 65% FC upper irrigation limit (W2) combined with the soybean M1 treatment in water deficit years could effectively improve soil water, heat environment, and promote growth.

", "keywords": ["0106 biological sciences", "2. Zero hunger", "drip irrigation", "S", "interspecific competition", "mulching time", "Mulching time", "Agriculture", "Loess region in Shanxi province", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "6. Clean water", "agroforestry", "Interspecific competition", "Drip irrigation", "0401 agriculture", " forestry", " and fisheries", "Agroforestry"], "contacts": [{"organization": "Wang, Lisha, Wang, Ruoshui, Luo, Chengwei, Dai, Houshuai, Xiong, Chang, Wang, Xin, Zhang, Meng, Xiao, Wan,", "roles": ["creator"]}]}, "links": [{"href": "http://www.mdpi.com/2073-4395/13/2/511/pdf"}, {"href": "https://www.mdpi.com/2073-4395/13/2/511/pdf"}, {"href": "https://doi.org/10.3390/agronomy13020511"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agronomy", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/agronomy13020511", "name": "item", "description": "10.3390/agronomy13020511", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/agronomy13020511"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-02-10T00:00:00Z"}}, {"id": "10.5061/dryad.8gtht76q3", "type": "Feature", "geometry": null, "properties": {"license": "unspecified", "updated": "2026-05-31T07:02:14Z", "type": "Dataset", "title": "Mycorrhizal effects on decomposition and soil CO2 flux depend on changes in nitrogen availability during forest succession", "description": "Mycorrhizal fungi play a central role in plant nutrition and nutrient cycling, yet our understanding on their effects on free-living microbes, soil carbon (C) decomposition and soil CO2 fluxes remains limited. Here we used trenches lined with mesh screens of varying sizes to isolate mycorrhizal hyphal effects on soil C dynamics in subtropical successional forests. We found that the presence of mycorrhizal hyphae suppressed soil CO2 fluxes by 17% in early-successional forests, but enhanced CO2 losses by 20% and 32% in mid- and late-successional forests, respectively. The inhibitory effects of mycorrhizal fungi on soil CO2 fluxes in the young stands were associated with changes in soil nitrogen (N) mineralization and microbial activities, suggesting that competition between mycorrhizae and saprotrophs for N likely suppressed soil C decomposition. In the mid- and late-successional stands, mycorrhizal enhancement of CO2 release from soil likely resulted from both hyphal respiration and mycorrhizal-induced acceleration of organic matter decay. Synthesis. Our results highlight the sensitivity of mycorrhizal fungi-saprotroph interactions to shifts in nutrient availability and demand, with important consequences for soil carbon dynamics particularly in ecosystems with low nutrient conditions. Incorporating such interactions into models should improve the simulations of forest biogeochemical cycles under global change.", "keywords": ["mycelial respiartion", "soil carbon stabilization", "soil nitrogen", "15. Life on land", "Gadgil effect", "enzyme activity", "mycorrhizae-saprotroph competition"]}, "links": [{"href": "https://doi.org/10.5061/dryad.8gtht76q3"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.8gtht76q3", "name": "item", "description": "10.5061/dryad.8gtht76q3", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.8gtht76q3"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-09-06T00:00:00Z"}}, {"id": "10.5061/dryad.t4b8gtj8d", "type": "Feature", "geometry": null, "properties": {"license": "unspecified", "updated": "2026-05-31T07:02:20Z", "type": "Dataset", "created": "2024-02-07", "title": "Data for: Male, female and mixed-sex poplar plantations support divergent soil microbial communities", "description": "unspecifiedMixed-species forests are often more productive than monocultures because of a lower niche overlap and higher taxonomic and functional diversity of soil microbial communities. Males and females of dioecious plants have sex-specific adaptations to diverse habitats. The potential of using sexual differences in establishing more diverse poplar plantations has not been explored in degraded areas. We conducted a series of greenhouse and field experiments to investigate how belowground competition, soil microbial communities and seasonal variation nitrogen content differ among female, male and mixed-sex Populus cathayana plantations. In the greenhouse experiment, female neighbors suppressed the growth of males under optimal nitrogen conditions. However, male neighbors enhanced \u03b415N of females under inter-sexual competition. In the field, the root length density, root area density and biomass of fine roots were lower in female plantations than in male or mixed-sex plantations. Bacterial networks of female, male and mixed-sex plantations were characterized by different composition of hub nodes, including connectors, module and network hubs. The sex composition of plantations altered bacterial and fungal community structures according to Bray-Curtis distances, with 44% and 65% of variance explained by the root biomass, respectively. The total soil nitrogen content of mixed-sex plantation was higher than that in female plantation in spring and summer. The mixed-sex plantation also had a higher \u03b2-1,4-N-acetyl-glucosaminidase activity in summer and a higher nitrification rate in autumn than the other two plantations. The seasonal soil N content, nitrification rate and root distribution traits demonstrated spatiotemporal niche separation in the mixed-sex plantation. We argue that a strong female-female competition and limited nitrogen content could strongly impede plant growth and reduce the resistance of monosex plantations to climate change and the mixed-sex plantations constitutes a promising way to restore degraded land.", "keywords": ["belowground competition", "plant-microbe interactions", "neighbor sexual identity", "FOS: Earth and related environmental sciences", "microbiota assembly", "dioecious species"], "contacts": [{"organization": "Guo, Qingxue", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.t4b8gtj8d"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.t4b8gtj8d", "name": "item", "description": "10.5061/dryad.t4b8gtj8d", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.t4b8gtj8d"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-02-23T00:00:00Z"}}, {"id": "10.5281/zenodo.14945573", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-05-31T07:03:28Z", "type": "Report", "title": "Deliverable D1.5 \u2013 Set of novel QSAR models/grouping/read-across and in vitro bioassay approaches predicting relevant toxicological endpoints for PFAS/PM(T) chemicals", "description": "The deliverable is a profiling of activities for pre-selected single and complex industrial mixtures of PFAS/PM(T)s with in vitro bioassay testing and QSAR modeling for a selection of most relevant toxicological endpoints. \u00a0A set of novel in silico and in vitro methods have been developed and applied for the large group of PFAS/PM(T)s. The in vitro toxicity profiling followed a stepwise approach, by first testing the potential reference compounds PFOA and PFOS as well as industrial mixtures (e.g., GenX and ADONA) with a wide range of in silico and in vitro methods (see for an overview in Annex, Table A1). Based on these initial results, the most suitable in vitro toxicity endpoints (see table 7 and table 10) have been chosen for toxicity profiling the wider set of the selected PFAS compounds as well as for toxicity testing selected complex mixture (e.g., water, soil). In the case of PMTs, at first, the potential bioactivity of several key PMTs (e.g., bisphenol A, triclosan, methyl-paraben, 5-chlorobenzotriazole, benzothiazole) have been evaluated using a range of in vitro toxicity profiling methods (see for an overview in Annex, Table A1). In a second step, the most suitable in vitro toxicity endpoints (see table 8 and 11) have been used for toxicity profiling an extended group of PMT compounds as well as for testing complex mixtures (e.g., water, soil).\u00a0 Regarding the group of PFAS, in silico modelling has been performed for a few thousands of chemicals (see Kowalski et al.,\u00a0 2023), while in case of in vitro testing the focus was on a selection of 40/2 PFAS/industrial mixtures compounds proposed by the chemical-analytical laboratories involved in PROMISCES and commercially available within a limited budget. In this study, the in silico modeling part investigated PFAS binding potencies to nuclear hormone receptors (NHRs) such as peroxisome proliferator-activated receptors (PPARs) \u03b1, \u03b2, and \u03b3 and thyroid hormone receptors (TRs) \u03b1 and \u03b2. In the first in silico step, the developed QSAR models were implemented for the screening approach of a large group of compounds (4464) from the NORMAN Database related to these 5 above mentioned NHRs. The in silico analyses indicated that the probability of PFAS binding to the receptors depends on the chain length, the number of fluorine atoms, and the number of branches in the molecule. According to the findings, the considered PFAS group bind to the PPAR\u03b1, \u03b2, and \u03b3 only with low or moderate probability, while in the case of TR \u03b1 and \u03b2 it is similar except that those chemicals with longer chains show a moderately high probability of binding. The in silico analysis shows from the here tested 15 endpoints that most PFAS reflect a high binding probability to sex hormone receptors (anti-AR and ER). however, receptors from the peroxisome proliferator-activated (PPAR \u03b1, \u03b2, \u03b3) glucocorticoid (GR and anti-GR), liver X (LXR \u03b1, \u03b2) and retinoid X (RXR \u03b1) groups are unaffected or slightly affected by PFAS (low and moderate binding probability). Regarding the parallel in vitro bioassay toxicity analysis, an established standardised in vitro test battery (consisting of e.g., genotoxicity, neurotoxicity, cytotoxicity, obesity and early warning testing) was applied to meet specific criteria of PFAS/iPM(T) (endpoints, sensitivity and specificity). Based on existing and improved CALUX bioassays, different toxicological endpoints involving metabolic syndrome (obesity related PPAR), endocrine EATS testing, genotoxicity (p53 related) and general toxicity pathways (e.g. early warning PXR) to characterise PM(T) properties of chemicals were assessed. The in vitro bioassay groups addressed 40 PFAS compounds (e.g. all regulated 20 PFAS) and industrial standards (e.g., ADONA, GenX) with a combination of a wide range of CALUX bioassay endpoints (e.g., table 7 with 6 endpoints) and additional general toxicity in vitro bioassays (e.g., table 9 with 8 in vitro endpoints). Potency factors for selected PFAS/ iPM(T) have been established for several of the here used in vitro bioassays by two bioassay laboratories (UBA, BDS). Comparing both data sets, 80% of the relative potency factors for PFAS tested on e.g., the TTR-TRb CALUX, were found to be within an order of magnitude. Potency factors for selected PFAS have been established for each of the here used in vitro human cell-based CALUX bioassays. For example, in case of the TTR-TRb CALUX bioassay, the RPF values are rang from non-detected (e.g., several FTOH compounds) to the P37DMOA compound (RPF = up to 2.3; see tables 7 and 10). Additional up to 22 PM(T) chemicals (e.g., see table 8 and 10) have been tested with a combination of a wide range of CALUX bioassays (e.g., table 8 with 6 endpoints) and additional general toxicity in vitro bioassays (e.g., table 10 with 4 in vitro endpoints). This included i) selecting a wide range of reporter gene assays to screen the toxic profiles of a set of PM(T) chemicals, ii) selecting the most suitable bioassay panel, and iii) validating bioassay panels and cross-validating the responses obtained from the selected panel of human cell-line based bioassays Potency factors for selected iPM(T) have been established for each of the here used in vitro human cell-based CALUX bioassays. For all CALUX bioassays applied, RPF-values ranged from not-detected (e.g., several in vitro endpoints at benzotriazole) up to RPF values above 0.5 for several PMTs (e.g., galaxolide and triclosan, see table 8, or methyl-paraben in table 10 at the male hormone inhibition). In a second step, the 3 most active PFAS compounds on the in vitro TTR-TRb CALUX (PFOA with RPF = 1; P37DMOA with RPF = 2.3; 6:2 FTAB with RPF = 0.00015; see table 7) have been used to find in in silico modelling new PFAS structure-analogue compounds. In case of PFOA 12 structure-in vitro toxicity analogues were found, while in case of P37DMOA only 3 analogues and in case of 6:2 FTAB only 7 analogues were found. Our study shows that such an combined approach of in silico and in\u00a0 vitro toxicity evaluations of single PFAS congeners (from the large group of PFAS) is a promising and suitable strategy to cover a large variety of different key events in toxicology in a time- and cost-efficient way. Such early key events can lead to protein production or molecular signalling that occur in individual cells. Later events can include altered tissue or organ function. Such key events are important because after the molecular initiating event, they can characterize the progression of the toxicity. Relative potency factors (RPFs) have been determined here by a combination of in silico and vitro toxicity tools and can further help to give first toxicity indications for the handful regulated and the not yet regularly tested/regulated PFAS to be included in the testing strategy for single compounds and complex mixtures of these compounds.", "keywords": ["Deliverable", "thyroid hormone transport competition", "TTR TR CALUX", "PFAS", "in vitro assay (CALUX)", "non-animal methods (NAM)", "in silico modeling"], "contacts": [{"organization": "Behnisch, Peter, Sosnowska, Anita, Mombelli, Enrico, Kuckelkorn, Jochen,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5281/zenodo.14945573"}, {"rel": "self", "type": "application/geo+json", "title": "10.5281/zenodo.14945573", "name": "item", "description": "10.5281/zenodo.14945573", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5281/zenodo.14945573"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-02-28T00:00:00Z"}}, {"id": "10045/75093", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-05-31T07:05:05Z", "type": "Journal Article", "created": "2018-04-16", "title": "Intransitive competition is common across five major taxonomic groups and is driven by productivity, competitive rank and functional traits", "description": "Abstract

Competition can be fully hierarchical or intransitive, and this degree of hierarchy is driven by multiple factors, including environmental conditions, the functional traits of the species involved or the topology of competition networks. Studies simultaneously analysing these drivers of competition hierarchy are rare. Additionally, organisms compete either directly or via interference competition for resources or space, within a local neighbourhood or across the habitat. Therefore, the drivers of competition could change accordingly and depend on the taxa studied.

We performed the first multi\uffe2\uff80\uff90taxon study on pairwise competition across major taxonomic groups, including experiments with vascular plants, mosses, saprobic fungi, aquatic protists and soil bacteria. We evaluated how general is competition intransitivity from the pairwise competition matrix including all species and also for each possible three\uffe2\uff80\uff90species combination (triplets). We then examined which species were likely to engage in competitive loops and the effects of environmental conditions, competitive rank and functional traits on intransitive competition.

We found some degree of competition intransitivity in all taxa studied, with 38% to 5% of triplets being intransitive. Variance in competitive rank between species and more fertile conditions strongly reduced intransitivity, with triplets composed of species differing widely in their competitive ranks much less likely to be intransitive.

Including functional traits of the species involved more than doubled the variation explained compared to models including competitive rank only. Both trait means and variance within triplets affected the odds of them being intransitive. However, the traits responsible and the direction of trait effects varied widely between taxa, suggesting that traits can have a wide variety of effects on competition.

Synthesis. We evaluated the drivers of competition across multiple taxa and showed that productivity and competitive rank are fundamental drivers of intransitivity. We also showed that not only the functional traits of each species, but also those of the accompanying species, determine competition intransitivity. Intransitive competition is common across multiple taxa but can dampen under fertile conditions or for those species with large variance in their competitive abilities. This provides a first step towards predicting the prevalence of intransitive competition in natural communities.

In this study, a typical apple\u2013soybean intercropping system was used to analyze the effects of different soil water and heat regulation modes on the spatial distribution of the soil water content (SWC), photosynthetic physiological characteristics, and growth. Three maximum irrigation levels [50% (W1), 65% (W2), and 80% (W3) of field capacity (FC)] and two mulching intervals [from seedling to podding stage (M1) and during the full stage (M2) of soybeans] were tested. The results showed that the SWC of W3M2 was the highest, while the W2M1 and W1M2 treatments used more deep soil water. Irrigation increased the chlorophyll content, net photosynthesis, and transpiration rate of leaves in the agroforestry system. In addition, the net photosynthetic rate of leaves under the W2 irrigation level increased after mulch removal in the later growth stage. At W1 and W2 irrigation levels, the soybean yield of half-stage mulching was 0.85\u201315.49% higher than that of full-stage mulching. Multiple regression analysis showed that grain yield under the W3M2 treatment reached the maximum value of the fitting equation. The photosynthetic rate, water use efficiency, and grain yield under W2M1 reached 71\u201386% of the maximum value of the fitting equation, with the largest soil plant analysis development value. To effectively alleviate water competition in the apple\u2013soybean intercropping system, our results suggest adoption of the 80% FC upper irrigation limit (W3) combined with soybean M2 treatment in young apple trees\u2013soybean intercropping system during water abundant years. In addition, adoption of the 65% FC upper irrigation limit (W2) combined with the soybean M1 treatment in water deficit years could effectively improve soil water, heat environment, and promote growth.

", "keywords": ["0106 biological sciences", "2. Zero hunger", "drip irrigation", "S", "interspecific competition", "mulching time", "Mulching time", "Agriculture", "Loess region in Shanxi province", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "6. Clean water", "agroforestry", "Interspecific competition", "Drip irrigation", "0401 agriculture", " forestry", " and fisheries", "Agroforestry"], "contacts": [{"organization": "Wang, Lisha, Wang, Ruoshui, Luo, Chengwei, Dai, Houshuai, Xiong, Chang, Wang, Xin, Zhang, Meng, Xiao, Wan,", "roles": ["creator"]}]}, "links": [{"href": "http://www.mdpi.com/2073-4395/13/2/511/pdf"}, {"href": "https://www.mdpi.com/2073-4395/13/2/511/pdf"}, {"href": "https://doi.org/10261/309081"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agronomy", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10261/309081", "name": "item", "description": "10261/309081", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10261/309081"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-02-10T00:00:00Z"}}, {"id": "10451/45438", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-31T07:05:19Z", "type": "Journal Article", "created": "2020-07-09", "title": "The distribution of herbivores between leaves matches their performance only in the absence of competitors", "description": "Abstract

Few studies have tested how plant quality and the presence of competitors interact in determining how herbivores choose between different leaves within a plant. We investigated this in two herbivorous spider mites sharing tomato plants: Tetranychus urticae, which generally induces plant defenses, and Tetranychus evansi, which suppresses them, creating asymmetrical effects on coinfesting competitors. On uninfested plants, both herbivore species preferred young leaves, coinciding with increased mite performance. On plants with heterospecifics, the mites did not prefer leaves on which they had a better performance. In particular, T.\uffc2\uffa0urticae avoided leaves infested with T.\uffc2\uffa0evansi, which is in agreement with T.\uffc2\uffa0urticae being outcompeted by T.\uffc2\uffa0evansi. In contrast, T.\uffc2\uffa0evansi did not avoid leaves with the other species, but distributed itself evenly over plants infested with heterospecifics. We hypothesize that this behavior of T.\uffc2\uffa0evansi may prevent further spread of T.\uffc2\uffa0urticae over the shared plant. Our results indicate that leaf age determines within\uffe2\uff80\uff90plant distribution of herbivores only in absence of competitors. Moreover, they show that this distribution depends on the order of arrival of competitors and on their effects on each other, with herbivores showing differences in behavior within the plant as a possible response to the outcome of those interactions.Predicting species responses to climate change and land use practices requires understanding both the direct effects of environmental factors as well as the indirect effects mediated by changes in belowground and aboveground competition. Belowground root competition from surrounding vegetation and aboveground light competition are two important factors affecting seedling establishment. However, few studies have jointly examined the effect of belowground root and light competition on seedling establishment, especially under long-term nitrogen addition and mowing. Here, we examined how belowground root competition from surrounding vegetation and aboveground light competition affect seedling establishment within a long-term nitrogen addition and mowing experiment. Seedlings of two grasses (Stipa krylovii and Cleistogenes squarrosa) were grown with and without belowground root competition under control, nitrogen addition, and mowing treatments, and their growth characteristics were monitored. The seedlings of the two grasses achieved higher total biomass, height, mean shoot and root mass, but a lower root/shoot ratio in the absence than in the presence of belowground root competition. Nitrogen addition significantly decreased shoot biomass, root biomass, and the survival of the two grasses. Regression analyses revealed that the biomass of the two grass was strongly negatively correlated with net primary productivity under belowground root competition, but with the intercept photosynthetic active radiation in the absence of belowground root competition. This experiment demonstrates that belowground root competition can alter the grass seedling establishment response to light in a long-term nitrogen addition and mowing experiment.30 cm DBH) to avoid influences from species other than larch and oak. Data collection: Dwarf bamboo: Average height measured from five random points per plot. Understory vascular plants: All species, including trees and shrubs <1.3 m tall, recorded. Species cover: Measured using a modified Braun-Blanquet cover class system with seven cover categories. Braun -Blanquet scaleCover range (%)Used in calculations (%) r <0.1 + 0.1 \u2013 1 1 1 \u2013 5 2 5 \u2013 25 3 25 \u2013 50 4 50 \u2013 75 5 75 \u2013 100 *For dwarf bamboo, which was very abundant, 100% cover was used for category 5. This did not affect the calculations. Taxonomic groupings: Grouped species: Dwarf bamboos: Sasa spp. (S. kurilensis, S. nipponica, S. palmata, Sasamorpha borealis). Graminoids: Carex, Juncus, Luzula, Poaceae. Non-flowering specimens: Rosa, Rubus, Viola (excluding Viola tokubuchiana var. tokubuchiana which was registered separately). Maple seedlings: Acer spp. (excluding A. rufinerve which was registered separately). Birch seedlings: Betula (B. platyphylla var. japonica, B. ermanii). Euonymus species: E. alatus, E. macropterus, E. sieboldianus (excluding vine E. fortunei). Nomenclature: Follows Wamei checklist version 1.10 (Yamanouchi 2022) https://gbif.jp/activities/checklist/wamei_checklist_110/", "keywords": ["arters-utbredning", "barrskogar", "bergsskog", "cervidae", "competitive-exclusion", "coniferous-forest", "coniferous-forests", "deer", "deer-moose", "forest-biodiversity", "forest-composition-vegetation-structure", "forest-conservation", "forest-cover", "forest-damage", "forest-dynamics", "forest-ecology", "forest-ecosystem", "forest-floor", "forest-inventory", "forest-protection", "forest-regeneration", "forest-restoration", "forest-structure", "forest-vegetation", "game-fences", "game-management", "habitats-and-biotopes", "hjortdjur", "japan", "ka\u0308rlva\u0308xter", "land-use", "lo\u0308vskogar", "mark", "markanva\u0308ndning", "montane-forest", "mountain-forest", "nature-conservation", "naturskydd", "naturtyper-och-biotoper", "oak-forest", "plant-species-composition", "protected-sites", "se", "skogens-biologiska-ma\u030angfald", "skogens-ekologi", "skogens-ekosystem", "skogsekologi", "skogsfo\u0308rsto\u0308relse", "skogsfo\u0308ryngring", "skogsskydd-(naturskydd)", "skogsskydd-(skogsbruk)", "skogsvegetation", "skyddade-omra\u030aden", "soil", "species-competition", "species-distribution", "species-diversity", "species-interactions", "temperate-broadleaf-and-mixed-forests", "temperate-coniferous-forest", "temperate-deciduous-forest", "temperate-forest", "tempererad-skog", "vascular-plant-species", "vascular-plant-species-abundance", "vascular-plant-species-coverage", "vascular-plants", "viltsta\u0308ngsel", "viltva\u030ard"], "contacts": [{"organization": "Unknown", "roles": ["creator"]}, {"organization": "http://dataportal.se/organisation/SE2021002817", "roles": ["publisher"]}]}, "links": [{"href": "http://data.europa.eu/88u/dataset/https-doi-org-10-5878-mxtb-y706"}, {"href": "https://doi.org/10.5878/mxtb-y706"}, {"href": "https-doi-org-10-5878-mxtb-y706"}, {"rel": "self", "type": "application/geo+json", "title": "27cfce4408f6f5a4dfc7106d1d78e053", "name": "item", "description": "27cfce4408f6f5a4dfc7106d1d78e053", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/27cfce4408f6f5a4dfc7106d1d78e053"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"null": "date"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=competition&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=competition&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=competition&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=competition&offset=41", "hreflang": "en-US"}], "numberMatched": 41, "numberReturned": 41, "distributedFeatures": [], "timeStamp": "2026-05-31T09:03:43.549201Z"}