Microplastics are recently discovered contaminants, yet knowledge on their sources and analysis is limited. For instance, paint microplastics are poorly known because soil separation protocols using flotation solutions cannot separate paint microplastics due to the higher density of paint microplastic versus common microplastics. Here, we designed a new two-step density separation protocol for paint microplastics, allowing paint microplastics to be separated from the soil without digestion. Paint particles were\uffc2\uffa0separated from soil samples collected around the graffiti wall at the Mauerpark, Berlin, then quantified according to their shape and color characteristic. The presence of polymers as binders in the paint particles was verified by Fourier transform infrared spectroscopy. Results show concentrations from 1.1\uffe2\uff80\uff89\uffc3\uff97\uffe2\uff80\uff89105 to 2.9\uffe2\uff80\uff89\uffc3\uff97\uffe2\uff80\uff89105 microplastics per Kg of dry soil, representing the highest microplastic concentration ever reported in the literature. Particle concentrations decreased and the median size increased with soil depth. Our results provide first evidence that spray painting, a technique with a wide range of applications from industry to art, leaves a legacy of environmental microplastic in soils that has so far gone unnoticed.
", "keywords": ["570", "Original Paper", "13. Climate action", "Paint microplastic", "0211 other engineering and technologies", "500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie", "02 engineering and technology", "Spray paint", "Infrared", "01 natural sciences", "Separation", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://link.springer.com/content/pdf/10.1007/s10311-022-01500-2.pdf"}, {"href": "https://doi.org/10.1007/s10311-022-01500-2"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Chemistry%20Letters", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10311-022-01500-2", "name": "item", "description": "10.1007/s10311-022-01500-2", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10311-022-01500-2"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-10-19T00:00:00Z"}}, {"id": "10.1007/s10342-006-0153-3", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-07-26T16:14:31Z", "type": "Journal Article", "created": "2006-10-24", "title": "The Effect Of Forest Management On Trace Gas Exchange At The Pedosphere-Atmosphere Interface In Beech (Fagus Sylvatica L.) Forests Stocking On Calcareous Soils", "description": "The effect of forest management (thinning) on in situ carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) trace gas exchange between soil and atmosphere was studied in three consecutive years at three beech forest sites, which differ in aspect [southwest (SW), northeast (NE), northwest (NW)]. At all sites adjacent thinning plots (\u201cT\u201d) and untreated control plots (\u201cC\u201d) were established. Measurements at the SW and NE sites covered the years 4\u20136 after thinning while at the NW site measurements covered the year before and the first 2\u00a0years after thinning. Mean N2O fluxes were\u00a0<3\u00a0\u03bcg\u00a0N2O\u2013N\u00a0m\u22122\u00a0h\u22121 at all plots except for the newly thinned NWT plot. CH4 uptake was rather low, too. Very low CH4 oxidation rates during dry periods are explained by physiological drought stress for CH4 oxidizers. Heterotrophic litter decomposition constitutes the largest part of total soil respiration. On the whole, no significant positive or negative effects of the silvicultural treatment on the magnitude of CO2-, CH4- and N2O-trace gas exchange could be observed at the SW site 4\u20136\u00a0years after thinning. Also at the NE site, no effects of thinning on CO2 and N2O fluxes could be demonstrated. However, at this site a significant moisture-induced lower CH4 uptake could be shown. At the NW site forest management led to a dramatic increase in N2O emissions in the first two summers after thinning and to distinct effects on CO2 emissions and CH4 uptake in the first year after the felling. The unambiguous effects of thinning at the NW site are mainly related to higher C input by dead residues leading to enhanced mineralization activity, to a shift in the competition for nutrients favoring microorganisms as compared to trees and to changes in the soil water availability at the thinned plot. Considering the data obtained from the NE and SW site we expect that with the development of an understorey vegetation at the NW site the observed effects on the magnitude of trace gas exchange due to thinning will continue to decline in the following years. Our results implicate that it is indispensable to take account of the effects of forest management in order to accurately calculate trace gas emission inventories for the investigated forest ecosystem in case thinning took place immediately before.", "keywords": ["580", "Earth sciences", "570", "info:eu-repo/classification/ddc/550", "550", "ddc:550", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1007/s10342-006-0153-3"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/European%20Journal%20of%20Forest%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10342-006-0153-3", "name": "item", "description": "10.1007/s10342-006-0153-3", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10342-006-0153-3"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2007-04-01T00:00:00Z"}}, {"id": "10.1016/j.envpol.2024.125307", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-26T16:15:51Z", "type": "Journal Article", "created": "2024-11-12", "title": "Biodegradable microplastics induce profound changes in lettuce (Lactuca sativa) defense mechanisms and to some extent deteriorate growth traits", "description": "The development of agricultural technologies has intensified the use of plastic in this sector. Products of plastic degradation, such as microplastics (MPs), potentially threaten living organisms, biodiversity and agricultural ecosystem functioning. Thus, biodegradable plastic materials have been introduced to agriculture. However, the effects of biodegradable plastic substitutes on soil ecosystems are even less known than those of traditional ones. Here, we studied the effects of environmentally relevant concentrations of MPs prepared from a biodegradable plastic (a starch-polybutylene adipate terephthalate blend, PBAT-BD-MPs) on the growth and defense mechanisms of lettuce (Lactuca sativa) in CLIMECS system (CLImatic Manipulation of ECosystem Samples). PBAT-BD-MPs in the highest concentrations negatively affected some traits of growth, i.e., dry weight percentage, specific leaf area, and both C and N contents. We observed more profound changes in plant physiology and biochemistry, as PBAT-BD-MPs decreased chlorophyll content and triggered a concerted response of plant defense mechanisms against oxidative stress. In conclusion, exposure to PBAT-BD-MPs induced plant oxidative stress and activated plant defense mechanisms, leading to oxidative homeostasis that sustained plant growth and functioning. Our study highlights the need for in-depth understanding of the effect of bioplastics on plants.", "keywords": ["580", "Chlorophyll", "0301 basic medicine", "570", "0303 health sciences", "salicylic acid", "Microplastics", "Lipid peroxidation", "lipid peroxidation", "Salicylic acid", "Biodegradable Plastics", "Plant Leaves", "Oxidative Stress", "03 medical and health sciences", "Starch-polybutylene adipate terephthalate", "Biodegradation", " Environmental", "total phenolic content", "starch-polybutylene adipate terephthalate", "Soil Pollutants", "PBAT", "Total phenolic content", "CLIMECS system", "Lactuca"], "contacts": [{"organization": "Sylwia Adamczyk, Laura J. Zantis, Sam van Loon, Cornelis A.M. van Gestel, Thijs Bosker, Rachel Hurley, Luca Nizzetto, Bartosz Adamczyk, Sannakajsa Velmala,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1016/j.envpol.2024.125307"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Pollution", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.envpol.2024.125307", "name": "item", "description": "10.1016/j.envpol.2024.125307", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.envpol.2024.125307"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-12-01T00:00:00Z"}}, {"id": "10.1007/s10457-013-9622-0", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:14:33Z", "type": "Journal Article", "created": "2013-05-14", "title": "Fertilizer Type And Species Composition Affect Leachate Nutrient Concentrations In Coffee Agroecosystems", "description": "Intensification of coffee (Coffea arabica) production is associated with increases in inorganic fertilizer application and decreases in species diversity. Both the use of organic fertilizers and the incorporation of trees on farms can, in theory, reduce nutrient loss in comparison with intensified practices. To test this, we measured nutrient concentrations in leachate at 15 and 100 cm depths on working farms. We examined (1) organically managed coffee agroforests (38 kg N ha\u22121 year\u22121; n = 4), (2) conventionally managed coffee agroforests (96 kg N ha\u22121 year\u22121; n = 4), and (3) one conventionally managed monoculture coffee farm in Costa Rica (300 kg N ha\u22121 year\u22121). Concentrations of nitrate (NO3 \u2212-N) and phosphate (PO4 3\u2212-P) were higher in the monoculture compared to agroforests at both depths. Nitrate concentrations were higher in conventional than organic agroforests at 15 cm only. Soil solutions collected under nitrogen (N)-fixing Erythrina poeppigiana had elevated NO3 \u2212-N concentrations at 15 cm compared to Musa acuminata (banana) or Coffea. Total soil N and carbon (C) were also higher under Erythrina. This research shows that both fertilizer type and species affect concentrations of N and P in leachate in coffee agroecosystems.", "keywords": ["Soil science", "2. Zero hunger", "570", "0401 agriculture", " forestry", " and fisheries", "Agriculture", "Forests and forestry", "04 agricultural and veterinary sciences", "15. Life on land", "630", "6. Clean water"]}, "links": [{"href": "https://doi.org/10.1007/s10457-013-9622-0"}, {"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": "10.1007/s10457-013-9622-0", "name": "item", "description": "10.1007/s10457-013-9622-0", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10457-013-9622-0"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-05-15T00:00:00Z"}}, {"id": "10.1007/s10530-011-0102-z", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:14:35Z", "type": "Journal Article", "created": "2011-09-15", "title": "Managing Invasions At The Cost Of Native Habitat? An Experimental Test Of The Impact Of Fire On The Invasion Of Chromolaena Odorata In A South African Savanna", "description": "Successfully managing invasive plants in natural systems is extremely difficult. Recently however, progress has been made with an approach focused on changing ecosystem processes through the disturbance regime. We performed a large-scale (3 ha) full-factorial field experiment in densely invaded woodland in Hluhluwe-iMfolozi Park, a savanna reserve in South Africa, to study the effect of fire on the control of the pan-tropical invasive exotic shrub Chromolaena odorata in combination with the conventional method, i.e. manual clearing and herbicide application. We show how fire interacted with the conventional clearing of C. odorata and induced an intense canopy fire that caused a shift from woodland to grassland. After 2.5 years of monitoring, grasses were still dominant and re-invasion minimal. It is important to note that fire without prior clearing did not have the same effect and was not successful in reducing densities of C. odorata. An integrated control practice targeting the species with mechanical and chemical methods, while simultaneously targeting its habitat through fire, effectively controlled dense C. odorata thickets during the course of the experiment. However, this approach transformed regular surface fires into high-intensity canopy fires that are rare in savannas. We discuss how this altered fire regime may threaten native habitats, including fire-sensitive forest patches and riverine woodlands within the savanna mozaic. This is an important dilemma for managers that should not be overlooked and asks for long-term data on the impact of control programs on the native vegetation.
", "keywords": ["ALIEN PLANTS", "0106 biological sciences", "570", "BURN AGRICULTURE", "Ecology", "Conservation", "15. Life on land", "Fire", "ECOLOGY", "01 natural sciences", "Integrative management", "Tree-grass dynamics", "Hluhluwe-iMfolozi Park", "BIOLOGICAL INVASIONS", "EUPATORIUM-ODORATUM", "NATURE RESERVES", "ECOSYSTEMS", "Biological invasions", "NATIONAL-PARK", "ENVIRONMENTS FOLLOWING SLASH", "Ecology", " Evolution", " Behavior and Systematics", "TROPICAL SAVANNAS"]}, "links": [{"href": "https://doi.org/10.1007/s10530-011-0102-z"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Biological%20Invasions", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10530-011-0102-z", "name": "item", "description": "10.1007/s10530-011-0102-z", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10530-011-0102-z"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-09-16T00:00:00Z"}}, {"id": "10.1007/s10457-023-00820-8", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:14:34Z", "type": "Journal Article", "created": "2023-02-25", "title": "Subsoiling for planting trees in dehesa system: long-term effects on soil organic carbon", "description": "AbstractIncorporating trees into agricultural systems, including grasslands, increases the soil organic carbon sequestration and contributes to climate change mitigation. Site preparation for tree establishment is a common practice that can involve a variety of techniques and agricultural implements such as subsoiling. This study aimed to evaluate the long-term effects of subsoiling on soil organic carbon (SOC) concentrations and stocks in a Mediterranean grassland afforested with holm oaks 22\uffc2\uffa0years ago and now converted into a Dehesa agroforestry system. The study was conducted in a dehesa farm in Southwest Spain. Soil samples were taken at six depths under 10 tree canopies within and outside the original subsoiling line. Subsoiling significantly decreased SOC concentration. Mean SOC concentration in the first 20\uffc2\uffa0cm was 30% lower at the subsoiling line. SOC stocks for the first 60\uffc2\uffa0cm were 2660\uffc2\uffa0g\uffc2\uffa0m\uffe2\uff88\uff922 within the subsoiling line and 4320\uffc2\uffa0g\uffc2\uffa0m\uffe2\uff88\uff922 outside the line. There was a clear reduction in SOC concentration and stock with increasing depth. Root abundance and deeper rooting increased with subsoiling but did not translate into sufficient carbon accumulation in the soil, which is moderate even after 22\uffc2\uffa0years. This study reveals that, in the long term, there is a trade-off in CO2 sequestration between tree planting and soil subsoiling, highlighting the need for further research into the potential benefits and detriments of subsoiling.13C", "570", "550", "Chronosequence C4/C3", "14 C", "14C", "13 C", "04 agricultural and veterinary sciences", "Molecular dynamics", "15. Life on land", "n-Alkanes", "Chronosequence C 4 /C 3", "PTMEs", "[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry", "[SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/Geochemistry", "0401 agriculture", " forestry", " and fisheries", "14. Life underwater"]}, "links": [{"href": "https://doi.org/10.1007/s10533-013-9920-7"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Biogeochemistry", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10533-013-9920-7", "name": "item", "description": "10.1007/s10533-013-9920-7", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10533-013-9920-7"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-10-30T00:00:00Z"}}, {"id": "10.1007/s10533-015-0157-5", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:14:37Z", "type": "Journal Article", "created": "2015-11-14", "title": "Chronic Nitrogen Fertilization And Carbon Sequestration In Grassland Soils: Evidence Of A Microbial Enzyme Link", "description": "Chronic nitrogen (N) fertilization can greatly affect soil carbon (C) sequestration by altering biochemical interactions between plant detritus and soil microbes. In lignin-rich forest soils, chronic N additions tend to increase soil C content partly by decreasing the activity of lignin-degrading enzymes. In cellulose-rich grassland soils it is not clear whether cellulose-degrading enzymes are also inhibited by N additions and what consequences this might have on changes in soil C content. Here we address whether chronic N fertilization has affected (1) the C content of light versus heavier soil fractions, and (2) the activity of four extracellular enzymes including the C-acquiring enzyme \u03b2-1,4-glucosidase (BG; necessary for cellulose hydrolysis). We found that 19\u00a0years of chronic N-only addition to permanent grassland have significantly increased soil C sequestration in heavy but not in light soil density fractions, and this C accrual was associated with a significant increase (and not decrease) of BG activity. Chronic N fertilization may increase BG activity because greater N availability reduces root C:N ratios thus increasing microbial demand for C, which is met by C inputs from enhanced root C pools in N-only fertilized soils. However, BG activity and total root mass strongly decreased in high pH soils under the application of lime (i.e. CaCO3), which reduced the ability of these organo-mineral soils to gain more C per units of N added. Our study is the first to show a potential \u2018enzyme link\u2019 between (1) long-term additions of inorganic N to grassland soils, and (2) the greater C content of organo-mineral soil fractions. Our new hypothesis is that the \u2018enzyme link\u2019 occurs because (a) BG activity is stimulated by increased microbial C demand relative to N under chronic fertilization, and (b) increased BG activity causes more C from roots and from microbial metabolites to accumulate and stabilize into organo-mineral C fractions. We suggest that any combination of management practices that can influence the BG \u2018enzyme link\u2019 will have far reaching implications for long-term C sequestration in grassland soils.", "keywords": ["DECOMPOSITION", "DYNAMICS", "570", "\u03b2-1", "4-Glucosidase", "/dk/atira/pure/subjectarea/asjc/2300/2304", "NUTRIENT RELEASE", "Environmental Sciences & Ecology", "Root C:N ratio", "Extracellular enzyme activity", "LITTER DECAY", "FOREST ECOSYSTEMS", "0399 Other Chemical Sciences", "0402 Geochemistry", "Environmental Chemistry", "Geosciences", " Multidisciplinary", "beta-1", "4-Glucosidase", "Earth-Surface Processes", "Water Science and Technology", "2. Zero hunger", "Multidisciplinary", "Science & Technology", "/dk/atira/pure/subjectarea/asjc/1900/1904", "Geology", "sequestration", "Agronomy & Agriculture", "04 agricultural and veterinary sciences", "15. Life on land", "Soil carbon", "N DEPOSITION", "ORGANIC-MATTER", "PHOSPHORUS", "Fertilization", "Physical Sciences", "N ratio [Root C]", "0401 agriculture", " forestry", " and fisheries", "Soil carbon sequestration", "Liming", "TURNOVER", "Life Sciences & Biomedicine", "Geosciences", "/dk/atira/pure/subjectarea/asjc/2300/2312", "Environmental Sciences", "RESPONSES"]}, "links": [{"href": "https://doi.org/10.1007/s10533-015-0157-5"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Biogeochemistry", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10533-015-0157-5", "name": "item", "description": "10.1007/s10533-015-0157-5", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10533-015-0157-5"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-11-14T00:00:00Z"}}, {"id": "10.1007/s10533-023-01091-2", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:14:37Z", "type": "Journal Article", "created": "2023-10-15", "title": "Global observation gaps of peatland greenhouse gas balances: needs and obstacles", "description": "Abstract
Greenhouse gas (GHGs) emissions from peatlands contribute significantly to ongoing climate change because of human land use. To develop reliable and comprehensive estimates and predictions of GHG emissions from peatlands, it is necessary to have GHG observations, including carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O), that cover different peatland types globally. We synthesize published peatland studies with field GHG flux measurements to identify gaps in observations and suggest directions for future research. Although GHG flux measurements have been conducted at numerous sites globally, substantial gaps remain in current observations, encompassing various peatland types, regions and GHGs. Generally, there is a pressing need for additional GHG observations in Africa, Latin America and the Caribbean regions. Despite widespread measurements of CO2 and CH4, studies quantifying N2O emissions from peatlands are scarce, particularly in natural ecosystems. To expand the global coverage of peatland data, it is crucial to conduct more eddy covariance observations for long-term monitoring. Automated chambers are preferable for plot-scale observations to produce high temporal resolution data; however, traditional field campaigns with manual chamber measurements remain necessary, particularly in remote areas. To ensure that the data can be further used for modeling purposes, we suggest that chamber campaigns should be conducted at least monthly for a minimum duration of one year with no fewer than three replicates and measure key environmental variables. In addition, further studies are needed in restored peatlands, focusing on identifying the most effective restoration approaches for different ecosystem types, conditions, climates, and land use histories.Soil erosion is one of the main threats driving soil degradation across the globe with important impacts on crop yields, soil biota, biogeochemical cycles, and ultimately human nutrition.
ObjectivesHere, using an empirical model, we present a global and temporally explicit assessment of soil erosion risk according to recent (2001\uffe2\uff80\uff932013) dynamics of rainfall and vegetation cover change to identify vulnerable areas for soils and soil biodiversity.
MethodsWe used an adaptation of the Universal Soil Loss Equation together with state of the art remote sensing models to create a spatially and temporally explicit global model of soil erosion and soil protection. Finally, we overlaid global maps of soil biodiversity to assess the potential vulnerability of these soil communities to soil erosion.
ResultsWe show a consistent decline in soil erosion protection over time across terrestrial biomes, which resulted in a global increase of 11.7% in soil erosion rates. Notably, soil erosion risk systematically increased between 2006 and 2013 in relation to the baseline year (2001). Although vegetation cover is central to soil protection, this increase was mostly driven by changes in rainfall erosivity. Globally, soil erosion is expected not only to have an impact on the vulnerability of soil conditions but also on soil biodiversity with 6.4% (for soil macrofauna) and 7.6% (for soil fungi) of these vulnerable areas coinciding with regions with high soil biodiversity.
ConclusionsOur results indicate that an increasing proportion of soils are degraded globally, affecting not only livelihoods but also potentially degrading local and regional landscapes. Similarly, many degraded regions coincide with and may have impacted high levels of soil biodiversity.microbial N mineralization (ammonification + nitrification), microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), and microbial respirations (MR) in grass dominated, herb dominated, and grass-herb mixed patches in an old-field community in northern China.Topsoil (0\u201310 cm) net N mineralization rate was 177% and 69% higher in mixed grass and herb patches (patch B) as compared to unmixed grass (patch A) or herb (patch C) patches, respectively. Topsoil MBN was significantly different among the three patches with the highest value for soils taken from umixed grass patches. However, patches with mixed grass and herb or herb dominated patches had 12% higher microbial respiration (MR) than unmixed grass patch. Clipping and N addition had no effects on net N mineralization or MBC, but both treatments decreased MBN and MR and increased the ratio between microbial biomass C and microbial biomass N (MBC/MBN) in the growing season. Incubation of soil cores under optimal water and temperature conditions in the laboratory showed that the response of microbial N transformations in soils under different vegetation patches to experimental N addition and clipping was limited by soil water availability. Our results strongly highlight the need to further study the importance of belowground C supply as a control of microbial N cycling processes. It also suggests that during the restoration process of degenerated croplands N cycling rates are stimulated, but that the magnitude of this stimulation is modulated by plant community composition of the old-fields.", "keywords": ["0106 biological sciences", "2. Zero hunger", "Earth sciences", "570", "info:eu-repo/classification/ddc/550", "550", "ddc:550", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences"]}, "links": [{"href": "https://doi.org/10.1007/s11104-010-0611-z"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-010-0611-z", "name": "item", "description": "10.1007/s11104-010-0611-z", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-010-0611-z"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-10-20T00:00:00Z"}}, {"id": "10.1007/s11104-011-0976-7", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-07-26T16:14:49Z", "type": "Journal Article", "created": "2011-09-09", "title": "Arbuscular Mycorrhizal Fungal Diversity In Perennial Pastures; Responses To Long-Term Lime Application", "description": "We investigated the genetic diversity of arbuscular mycorrhizal fungi (AMF) in soils and the roots of Phalaris aquatica L., Trifolium subterraneum L., and Hordeum leporinum Link growing in limed and unlimed soil, the influence of lime application on AMF colonization and the relationship between AMF diversity and soil chemical properties. The sampling was conducted on a long-term liming experimental site, established in 1992, in which lime was applied every 6\u00a0years to maintain soil pH (in CaCl2) at 5.5 in the 0\u201310\u00a0cm soil depth. Polymerase chain reaction, cloning and sequencing techniques were used to investigate the diversity of AMF. Altogether, 438 AMF sequences from a total of 480 clones were obtained. Sequences of phylotypes Aca/Scu were detected exclusively in soil, while Glomus sp. (GlGr Ab) and an uncultured Glomus (UnGlGr A) were detected only in plant roots. Glomus mosseae (GlGr Aa) was the dominant AMF in the pastures examined; however, the proportion of G. mosseae was negatively correlated with soil pH, exchangeable Ca and available P. Generally, diversity of the AMF phylotypes was greater in the bulk unlimed soil and plants from this treatment when compared to the limed treatments. Long-term lime application changed soil nutrient availability and increased AMF colonization, but decreased AMF phylotype diversity, implying that soil chemistry may determine the distribution of AMF in acid soils. Future studies are required to explore the functions of these AMF groups and select the most efficient AMF for sustainable farming in acid soils.", "keywords": ["2. Zero hunger", "570", "Soil acidity", "500", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "Glomeromycota", "Hordeum leporinum", "Phalaris aquatic", "6. Clean water", "diversity", "Trifolium subterraneum"]}, "links": [{"href": "https://doi.org/10.1007/s11104-011-0976-7"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-011-0976-7", "name": "item", "description": "10.1007/s11104-011-0976-7", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-011-0976-7"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-09-10T00:00:00Z"}}, {"id": "10.1007/s11104-011-1123-1", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-07-26T16:14:49Z", "type": "Journal Article", "created": "2012-01-20", "title": "Long-Term Litter Input Manipulation Effects On Production And Properties Of Dissolved Organic Matter In The Forest Floor Of A Norway Spruce Stand", "description": "Background and aims
Environmental factors such as climate and atmospheric CO2 control inputs of plant-derived matter into soils, which then determines properties and decomposition of soil organic matter. We studied how dissolved organic matter (DOM) in forest floors responded to six years of litter fall manipulation at a spruce site.
Methods
Experimental treatments included (i) ambient litter fall, as well as (ii) reduction or (iii) increase of litter fall, each by 80%.
Results
Reduced litter input did not change fluxes of dissolved organic carbon (DOC), which suggests that much of the mobile DOM in forest floors is not from recent litter but older, partly degraded material. Litter addition increased DOC fluxes over 6 years by 68% (Oi), 23% (Oe) and 12% (Oa). This was mainly due to excessive DOM production in Oi horizons, while net DOM production in Oe and Oa horizons decreased. Upon litter addition, aromaticity and molecule complexity of DOM released from the Oi horizon increased, but decreased for DOM leaving Oa horizons. The results suggest that DOM production by lignin degradation was enhanced in Oi but reduced in Oe and Oa horizons upon litter addition.
Conclusions
Recent litter is not an important source for DOM entering mineral soils, but increased litter input changes organic matter decomposition, thus affecting fluxes and properties of DOM within forest floors.", "keywords": ["570", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "630"]}, "links": [{"href": "https://doi.org/10.1007/s11104-011-1123-1"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-011-1123-1", "name": "item", "description": "10.1007/s11104-011-1123-1", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-011-1123-1"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-01-21T00:00:00Z"}}, {"id": "10.1007/s11104-012-1248-x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:14:49Z", "type": "Journal Article", "created": "2012-05-04", "title": "Effects Of Simulated Drought And Nitrogen Fertilizer On Plant Productivity And Nitrous Oxide (N2o) Emissions Of Two Pastures", "description": "Open AccessISSN:0032-079X", "keywords": ["Soil acidity", "Drought", "Soil microbial C and N", "04 agricultural and veterinary sciences", "15. Life on land", "Grassland", "Nitrification", "10127 Institute of Evolutionary Biology and Environmental Studies", "Grazing", "Greenhouse gases", "Summer drought", "13. Climate action", "1110 Plant Science", "Denitrification", "570 Life sciences; biology", "590 Animals (Zoology)", "0401 agriculture", " forestry", " and fisheries", "Compensatory growth; Denitrification; Drought; Grassland; Grazing; Greenhouse gases; Soil microbial C and N; Soil acidity; Nitrification; Summer drought", "Compensatory growth", "1111 Soil Science"]}, "links": [{"href": "https://doi.org/10.1007/s11104-012-1248-x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-012-1248-x", "name": "item", "description": "10.1007/s11104-012-1248-x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-012-1248-x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-05-05T00:00:00Z"}}, {"id": "10.1016/j.foreco.2007.10.027", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:16:00Z", "type": "Journal Article", "created": "2007-12-06", "title": "Pairwise Comparison Of Soil Organic Particle-Size Distributions In Native Savannas And Eucalyptus Plantations In Congo", "description": "Abstract Conversion of native vegetation into fast-growing tree plantations is known to affect soil organic matter (SOM): soil carbon (C) and nitrogen (N) content and their distribution in particle-size fractions can be modified in various ways depending on numerous factors, such as soil properties, SOM levels prior to conversion, climatic conditions, silvicultural practices and fire occurrence. Since 1978, 43,000\u00a0ha of clonal eucalyptus plantations have been established on sandy coastal plains under savannas near Pointe-Noire, Congo. We investigated the effects of afforestation on topsoil (0\u201310\u00a0cm) C and N through the analysis of their distribution in particle-size fractions using a pairwise experimental design that compared adjacent savannas and plantations. The studied plantations were of different ages (2\u201330-year-old stands) and differently affected by accidental fires. No significant difference in total topsoil C, N or C/N was observed between young plantations and savanna. In old plantations that had not been affected by fire, total topsoil C content was twice as high as in savanna ( p = 0.0016 ), on average, mostly involving fractions > 50\u00a0 \u03bc m. By contrast, total topsoil N did not differ significantly at these sites. In old plantations affected by fire, total topsoil C content did not differ significantly from that in savanna, but total topsoil N was 26 % lower in plantations than in savanna ( p = 0.0063 ), on average, and the decrease affected fractions 200\u00a0 \u03bc m especially. Whatever the fire occurrence, total topsoil C/N was higher in old plantations than in savanna, in fractions > 20\u00a0 \u03bc m especially.", "keywords": ["[SDV.SA.SF]Life Sciences [q-bio]/Agricultural sciences/Silviculture", "http://aims.fao.org/aos/agrovoc/c_7190", "SAVANNA", "SOIL ORGANIC MATTER", "FIRE", "analyse de sol", "FLUX ET STOCKS C", "http://aims.fao.org/aos/agrovoc/c_35657", "azote", "2. Zero hunger", "Eucalyptus", "FRACTIONATION", "fraction du sol", "forestry", "FIRE", "04 agricultural and veterinary sciences", "eucalyptus", "META ANALYSIS", "TURNOVER", "[SDV.SA.SF] Life Sciences [q-bio]/Agricultural sciences/Silviculture", " forestry", "plantations", "particle size fractionation", "http://aims.fao.org/aos/agrovoc/c_5990", "fire", "mati\u00e8re organique du sol", "http://aims.fao.org/aos/agrovoc/c_2683", "P33 - Chimie et physique du sol", "570", "PARTICLE-SIZE FRACTIONATION", "http://aims.fao.org/aos/agrovoc/c_24420", "MATTER DYNAMICS", "http://aims.fao.org/aos/agrovoc/c_5192", "TROPICAL SOILS", "LITTER DECOMPOSITION", "soil organic matter", "MANAGEMENT", "EUCALYPTUS", "savane", "http://aims.fao.org/aos/agrovoc/c_1301", "PINUS", "CHANGEMENT D'USAGE DES TERRES", "CARBON DYNAMICS", "http://aims.fao.org/aos/agrovoc/c_1811", "15. Life on land", "savanna", "K10 - Production foresti\u00e8re", "AFFORESTATION", "http://aims.fao.org/aos/agrovoc/c_6825", "0401 agriculture", " forestry", " and fisheries", "carbone", "impact sur l'environnement", "http://aims.fao.org/aos/agrovoc/c_7198"]}, "links": [{"href": "https://doi.org/10.1016/j.foreco.2007.10.027"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Forest%20Ecology%20and%20Management", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.foreco.2007.10.027", "name": "item", "description": "10.1016/j.foreco.2007.10.027", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.foreco.2007.10.027"}, {"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": "10.17863/cam.81466", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:19:42Z", "type": "Journal Article", "created": "2022-01-19", "title": "Multimodal correlative imaging and modelling of phosphorus uptake from soil by hyphae of mycorrhizal fungi", "description": "Summary
Phosphorus (P) is essential for plant growth. Arbuscular mycorrhizal fungi (AMF) aid its uptake by acquiring P from sources distant from roots in return for carbon. Little is known about how AMF colonise soil pore\uffe2\uff80\uff90space, and models of AMF\uffe2\uff80\uff90enhanced P\uffe2\uff80\uff90uptake are poorly validated.
We used synchrotron X\uffe2\uff80\uff90ray computed tomography to visualize mycorrhizas in soil and synchrotron X\uffe2\uff80\uff90ray fluorescence/X\uffe2\uff80\uff90ray absorption near edge structure (XRF/XANES) elemental mapping for P, sulphur (S) and aluminium (Al) in combination with modelling.
We found that AMF inoculation had a suppressive effect on colonisation by other soil fungi and identified differences in structure and growth rate between hyphae of AMF and nonmycorrhizal fungi. Our results showed that AMF co\uffe2\uff80\uff90locate with areas of high P and low Al, and preferentially associate with organic\uffe2\uff80\uff90type P species over Al\uffe2\uff80\uff90rich inorganic P.
We discovered that AMF avoid Al\uffe2\uff80\uff90rich areas as a source of P. Sulphur\uffe2\uff80\uff90rich regions were found to be correlated with higher hyphal density and an increased organic\uffe2\uff80\uff90associated P\uffe2\uff80\uff90pool, whilst oxidized S\uffe2\uff80\uff90species were found close to AMF hyphae. Increased S oxidation close to AMF suggested the observed changes were microbiome\uffe2\uff80\uff90related. Our experimentally\uffe2\uff80\uff90validated model led to an estimate of P\uffe2\uff80\uff90uptake by AMF hyphae that is an order of magnitude lower than rates previously estimated \uffe2\uff80\uff93 a result with significant implications for the modelling of plant\uffe2\uff80\uff93soil\uffe2\uff80\uff93AMF interactions.
", "keywords": ["580", "X-ray computed tomography", "570", "Research", "X-ray fluorescence", "Fungi", "Hyphae", "500", "Phosphorus", "mycorrhizas", "04 agricultural and veterinary sciences", "15. Life on land", "plant phosphorus uptake", "Plant Roots", "Soil", "rhizosphere modelling", "Mycorrhizae", "synchrotron", "0401 agriculture", " forestry", " and fisheries", "Soil Microbiology"]}, "links": [{"href": "https://eprints.soton.ac.uk/454110/1/Keyes_et_al_Myco_Paper_TR_04_01_2022_unmarked.pdf"}, {"href": "https://eprints.soton.ac.uk/454110/2/Figures_TR_22_12_2021.pdf"}, {"href": "https://eprints.soton.ac.uk/454110/3/SI_1_TR_22_12_2021_no_markup.pdf"}, {"href": "https://eprints.soton.ac.uk/454110/4/SI_2_TR_22_12_2021.pdf"}, {"href": "https://doi.org/10.17863/cam.81466"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/New%20Phytologist", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.17863/cam.81466", "name": "item", "description": "10.17863/cam.81466", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.17863/cam.81466"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-02-15T00:00:00Z"}}, {"id": "10.1007/s11104-014-2181-y", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-07-26T16:14:51Z", "type": "Journal Article", "created": "2014-07-02", "title": "Nutrient Availability And Ph Jointly Constrain Microbial Extracellular Enzyme Activities In Nutrient-Poor Tundra Soils", "description": "Tundra soils, which usually contain low concentrations of soil nutrients and have a low pH, store a large proportion of the global soil carbon (C) pool. The importance of soil nitrogen (N) availability for microbial activity in the tundra has received a great deal of attention; however, although soil pH is known to exert a considerable impact on microbial activities across ecosystems, the importance of soil pH in the tundra has not been experimentally investigated. We tested a hypothesis that low nutrient availability and pH may limit microbial biomass and microbial capacity for organic matter degradation in acidic tundra heaths by analyzing potential extracellular enzyme activities and microbial biomass after 6\u00a0years of factorial treatments of fertilization and liming. Increasing nutrients enhanced the potential activity of \u03b2-glucosidase (synthesized for cellulose degradation). Increasing soil pH, in contrast, reduced the potential activity of \u03b2-glucosidase. The soil phospholipid fatty acid concentrations (PLFAs; indicative of the amount of microbial biomass) increased in response to fertilization but were not influenced by liming. Our results show that soil nutrient availability and pH together control extracellular enzyme activities but with largely differing or even opposing effects. When nutrient limitation was alleviated by fertilization, microbial biomass and enzymatic capacity for cellulose decomposition increased, which likely facilitates greater decomposition of soil organic matter. Increased soil pH, in contrast, reduced enzymatic capacity for cellulose decomposition, which could be related with the bioavailability of organic substrates.", "keywords": ["2. Zero hunger", "570", "typpi", "pH", "13. Climate action", "entsyymiaktiivisuus", "PLFA", "610", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "7. Clean energy", "TUNDRA"]}, "links": [{"href": "https://doi.org/10.1007/s11104-014-2181-y"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-014-2181-y", "name": "item", "description": "10.1007/s11104-014-2181-y", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-014-2181-y"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-07-03T00:00:00Z"}}, {"id": "10.1016/j.agee.2005.10.013", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-07-26T16:15:07Z", "type": "Journal Article", "created": "2005-12-22", "title": "Fluxes Of Nitrous Oxide And Methane, And Nitrogen Leaching From Organically And Conventionally Cultivated Sandy Soil In Western Finland", "description": "Abstract Organic farming is considered to be environmentally beneficial partly due to the ban on synthetic fertilisers and pesticides, but there are few studies including direct measurements on the environmental impact of organic farming compared with the conventional system. In this study, greenhouse gas emissions and nitrogen leaching were compared in three different farming systems in western Finland. Two of them consisted of grass production and livestock raising, and were managed either organically (OF) or conventionally (CF). The third farming system was conventionally managed cereal production without livestock (CEF). Greenhouse gas (CH 4 and N 2 O) fluxes, nitrogen leaching and soil mineral nitrogen concentrations were measured for 1 year from three replicate plots of each farming system. The annual flux of nitrous oxide (N 2 O) was 1.4\u00a0kg\u00a0N\u00a0ha \u22121 in OF, 1.2\u00a0kg\u00a0N\u00a0ha \u22121 in CF, and 3.5\u00a0kg\u00a0N\u00a0ha \u22121 in CEF. Annual methane (CH 4 ) oxidation ranged between \u22120.72 and \u22120.44\u00a0kg\u00a0CH 4 \u00a0ha \u22121 in the three treatments. In the case of OF and CF nitrogen losses to water were larger than gaseous losses as N 2 O but in CEF they were equal. Of the N added as mineral fertiliser and cattle slurry to the CF fields, 1.6% was lost by leaching, while 0.7% was lost to the atmosphere as N 2 O. In CEF, the respective percentages were 3.0% for N leaching and 3.2% for N lost to the air. The environmental advantages of organic compared with conventional farming systems were not confirmed in this study.", "keywords": ["2. Zero hunger", "570", "kasvihuonekaasut", "13. Climate action", "luomutuotanto", "0401 agriculture", " forestry", " and fisheries", "Ka", "dityppioksidi", "04 agricultural and veterinary sciences", "15. Life on land", "metaani", "typen huuhtoutuminen"], "contacts": [{"organization": "Syv\u00e4salo, Eija, Regina, Kristiina, Turtola, Eila, Lemola, Riitta, Esala, Martti,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1016/j.agee.2005.10.013"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agriculture%2C%20Ecosystems%20%26amp%3B%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.agee.2005.10.013", "name": "item", "description": "10.1016/j.agee.2005.10.013", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2005.10.013"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2006-04-01T00:00:00Z"}}, {"id": "10.1016/j.agee.2006.12.005", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:15:08Z", "type": "Journal Article", "created": "2007-01-23", "title": "Effects Of Past And Current Disturbance On Carbon Cycling In Grassland Mesocosms", "description": "Abstract In species rich grasslands, management factors may affect carbon storage both directly (e.g. defoliation) and indirectly, by altering plant community structure. We set up a mesocosm experiment to separate these direct and indirect effects. Monoliths were sampled from two plots of a semi-natural, species-rich pasture at Theix (France), which had been subjected to contrasted disturbance levels, high versus low grazing, for 14 years. These monoliths were placed in transparent enclosures in natural light and temperature conditions. At the start of the experiment, half of the monoliths in each disturbance treatment were shifted to the opposite disturbance regime. Above and below ground CO2 fluxes were then measured continuously over 2 years. The net below ground carbon storage was positively correlated (P", "keywords": ["0106 biological sciences", "2. Zero hunger", "570", "SOL D'HERBAGES", "GRAZING", "04 agricultural and veterinary sciences", "15. Life on land", "SOIL ORGANIC CARBON", "01 natural sciences", "GREENGRASS", "[SDV.EE] Life Sciences [q-bio]/Ecology", " environment", "CARBON SEQUESTRATION", "RESPIRATION", "[SDV.EE]Life Sciences [q-bio]/Ecology", "0401 agriculture", " forestry", " and fisheries", "environment", "PRIMARY PRODUCTIVITY"]}, "links": [{"href": "https://doi.org/10.1016/j.agee.2006.12.005"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agriculture%2C%20Ecosystems%20%26amp%3B%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.agee.2006.12.005", "name": "item", "description": "10.1016/j.agee.2006.12.005", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2006.12.005"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2007-06-01T00:00:00Z"}}, {"id": "10.1016/j.agee.2008.09.006", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:15:09Z", "type": "Journal Article", "created": "2008-11-15", "title": "Biodiversity, Carbon Stocks And Sequestration Potential In Aboveground Biomass In Smallholder Farming Systems Of Western Kenya", "description": "Abstract While Carbon (C) sequestration on farmlands may contribute to mitigate CO 2 concentrations in the atmosphere, greater agro-biodiversity may ensure longer term stability of C storage in fluctuating environments. This study was conducted in the highlands of western Kenya, a region with high potential for agroforestry, with the objectives of assessing current biodiversity and aboveground C stocks in perennial vegetation growing on farmland, and estimating C sequestration potential in aboveground C pools. Allometric models were developed to estimate aboveground biomass of trees and hedgerows, and an inventory of perennial vegetation was conducted in 35 farms in Vihiga and Siaya districts. Values of the Shannon index ( H ), used to evaluate biodiversity, ranged from 0.01 in woodlots through 0.4\u20130.6 in food crop plots, to 1.3\u20131.6 in homegardens. Eucalyptus saligna was the most frequent tree species found as individual trees (20%), in windrows (47%), and in woodlots (99%) in Vihiga and the most frequent in woodlots (96%) in Siaya. Trees represented the most important C pool in aboveground biomass of perennial plants growing on-farm, contributing to 81 and 55% of total aboveground farm C in Vihiga and Siaya, respectively, followed by hedgerows (13 and 39%, respectively) and permanent crop stands (5 and 6%, respectively). Most of the tree C was located in woodlots in Vihiga (61%) and in individual trees growing in or around food crop plots in Siaya (57%). The homegardens represented the second C pool in importance, with 25 and 33% of C stocks in Vihiga and Siaya, respectively. Considering the mean total aboveground C stocks observed, and taking the average farm sizes of Vihiga (0.6\u00a0ha) and Siaya (1.4\u00a0ha), an average farm would store 6.5\u00a0\u00b1\u00a00.1\u00a0Mg\u00a0C\u00a0farm \u22121 in Vihiga and 12.4\u00a0\u00b1\u00a00.1\u00a0Mg\u00a0C\u00a0farm \u22121 in Siaya. At both sites, the C sequestration potential in perennial aboveground biomass was estimated at ca. 16\u00a0Mg\u00a0C\u00a0ha \u22121 . With the current market price for carbon, the implementation of Clean Development Mechanism Afforestation/Reforestation (CDM A/R) projects seems unfeasible, due to the large number of small farms (between 140 and 300) necessary to achieve a critical land area able to compensate the concomitant minimum transaction costs. Higher financial compensation for C sequestration projects that encourage biodiversity would allow clearer win\u2013win scenarios for smallholder farmers. Thus, a better valuation of ecosystem services should encourage C sequestration together with on-farm biodiversity when promoting CDM A/R projects.", "keywords": ["550", "petite exploitation agricole", "DIVERSITE SPECIFIQUE", "EXPLOITATION AGRICOLE", "01 natural sciences", "agroforestry", "eucalyptus saligna", "biodiversit\u00e9", "sistemas de explotaci\u00f3n", "STOCKAGE", "allocation", "soil fertility management", "agroforesterie", "2. Zero hunger", "Eucalyptus", "arbre", "AGROFORESTERIE", "http://aims.fao.org/aos/agrovoc/c_33949", "trees", "04 agricultural and veterinary sciences", "VILLAGE", "CARBONE", "http://aims.fao.org/aos/agrovoc/c_207", "s\u00e9questration du carbone", "agroforestry systems", "http://aims.fao.org/aos/agrovoc/c_4182", "P01 - Conservation de la nature et ressources fonci\u00e8res", "ecology", "agroforesteria", "UTILISATION DU SOL", "environment", "http://aims.fao.org/aos/agrovoc/c_2683", "570", "BIOMETRIE", "productivity", "arboles", "REFORESTATION", "secuestro de carbono", "utilisation des terres", "ARBRE", "http://aims.fao.org/aos/agrovoc/c_7887", "farming systems", "http://aims.fao.org/aos/agrovoc/c_1301", "0105 earth and related environmental sciences", "forests", "BIOMASSE", "BIODIVERSITE", "SYSTEME DE CULTURE", "15. Life on land", "carbon sequestration", "http://aims.fao.org/aos/agrovoc/c_331583", "COMPOSITION FLORISTIQUE", "http://aims.fao.org/aos/agrovoc/c_4086", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "carbone", "http://aims.fao.org/aos/agrovoc/c_7113"]}, "links": [{"href": "https://doi.org/10.1016/j.agee.2008.09.006"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agriculture%2C%20Ecosystems%20%26amp%3B%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.agee.2008.09.006", "name": "item", "description": "10.1016/j.agee.2008.09.006", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2008.09.006"}, {"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.agee.2014.02.021", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:15:13Z", "type": "Journal Article", "created": "2014-03-15", "title": "Biochar Does Not Affect Soil N-Transformations Or Microbial Community Structure Under Ruminant Urine Patches But Does Alter Relative Proportions Of Nitrogen Cycling Bacteria", "description": "Abstract Nitrogen (N) cycling, especially denitrification, can be significantly altered when biochar is used as a soil conditioner. These alterations in N-cycling have been attributed to a combination of physicochemical change, alterations in microbial community ecology and pervading climatic conditions. This study investigated seasonal bacterial community change over two years in combination with a short-term winter study of N-transformations under bovine urine patches. A silt-loam pastoral soil in Canterbury, New Zealand was amended with either 0, 15 or 30\u00a0t\u00a0ha \u22121 of Pinus radiata biochar (pyrolysed at \u223c450\u00a0\u00b0C) and bovine urine was added to patches within the 0 and 30\u00a0t\u00a0ha \u22121 biochar amended plots (designated as 0\u00a0U and 30\u00a0U treatments, where U indicates \u2018urine\u2019). No discernible differences in bacterial community structure were observed during the two year study or the short term N-transformation study when comparing non-amended and biochar-amended soil. Differences in bacterial community structure were only evident when comparing seasons, with data pertaining to each season from successive years clustering together. During the short-term N-transformation study, bacterial communities formed 3 distinct clusters corresponding to elevated levels of urine derived NH 4 + -N (days 0\u201310), increases in NO 3 \u2212 -N and N 2 O (days 10\u201322) and a decline in NO 3 \u2212 -N and N 2 O (day 20 onward). Biochar amendment did increase the relative abundance of up to 50% of individual operational taxonomic units (OTUs or \u2018species\u2019), including key nitrite oxidisers and nitrate reducers. Biochar amendment did not affect the concentrations of inorganic-N compounds. The nir S (nitrite reductase) gene became elevated in the 30\u00a0U treatment relative to the 0\u00a0U treatment \u223c10 days after the initial urine application. The nos Z (nitrous oxide reductase) gene became elevated in the 30\u00a0U plots during the latter part of the experiment. Conclusions: \u2022 Biochar did not have a significant impact on the microbial community structure in pastoral soil over the course of two years. \u2022 The relative proportion of nitrifiers and denitrifiers increased in biochar amended soils subjected to large influxes of urine derived N. \u2022 Differences in N-transformation dynamics in the presence of biochar during the winter months were not statistically significant.", "keywords": ["2. Zero hunger", "N\u2082O emissions", "570", "denitrification", "bovine urine", "silt-loam soil", "ANZSRC::30 Agricultural", "04 agricultural and veterinary sciences", "15. Life on land", "soil microbial ecology", "winter", "nitrification", "630", "6. Clean water", "veterinary and food sciences", "T-RFLP", "new generation sequencing", "13. Climate action", "ANZSRC::41 Environmental sciences", "XXXXXX - Unknown", "0401 agriculture", " forestry", " and fisheries", "biochar", "ANZSRC::44 Human society"], "contacts": [{"organization": "Timothy J. Clough, Kelly Hamonts, Leo M. Condron, Craig Anderson, Craig Anderson,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1016/j.agee.2014.02.021"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agriculture%2C%20Ecosystems%20%26amp%3B%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.agee.2014.02.021", "name": "item", "description": "10.1016/j.agee.2014.02.021", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2014.02.021"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-06-01T00:00:00Z"}}, {"id": "10.1007/s11104-016-2872-7", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-26T16:14:52Z", "type": "Journal Article", "created": "2016-04-08", "title": "Challenges in imaging and predictive modeling of rhizosphere processes", "description": "Background: Plant-soil interaction is central to human food production and ecosystem function. Thus, it is essential to not only understand, but also to develop predictive mathematical models which can be used to assess how climate and soil management practices will affect these interactions. Scope: In this paper we review the current developments in structural and chemical imaging of rhizosphere processes within the context of multiscale mathematical image based modeling. We outline areas that need more research and areas which would benefit from more detailed understanding. Conclusions: We conclude that the combination of structural and chemical imaging with modeling is an incredibly powerful tool which is fundamental for understanding how plant roots interact with soil. We emphasize the need for more researchers to be attracted to this area that is so fertile for future discoveries. Finally, model building must go hand in hand with experiments. In particular, there is a real need to integrate rhizosphere structural and chemical imaging with modeling for better understanding of the rhizosphere processes leading to models which explicitly account for pore scale processes.", "keywords": ["2. Zero hunger", "X-ray CT", "Dewey Decimal Classification::500 | Naturwissenschaften::570 | Biowissenschaften", " Biologie", "Soil Science", "Plant Science", "Chemical mapping", "04 agricultural and veterinary sciences", "15. Life on land", "Dewey Decimal Classification::500 | Naturwissenschaften::580 | Pflanzen (Botanik)", "13. Climate action", "Rhizosphere", "0401 agriculture", " forestry", " and fisheries", "Mathematical modeling", "Correlative imaging"]}, "links": [{"href": "https://eprints.soton.ac.uk/390303/1/Roose%2520et%2520al%25202016%2520Plant%2520Soil%2520Marschner%2520Review%2520Accepted.pdf"}, {"href": "https://doi.org/10.1007/s11104-016-2872-7"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-016-2872-7", "name": "item", "description": "10.1007/s11104-016-2872-7", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-016-2872-7"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-04-08T00:00:00Z"}}, {"id": "10.1007/s11104-016-3052-5", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:14:52Z", "type": "Journal Article", "created": "2016-09-10", "title": "Effects Of Forest Thinning On Soil-Plant Carbon And Nitrogen Dynamics", "description": "Corymbia spp. (previously included in the genus Eucalyptus) are common species in sub/tropical Australia and produce high quality timber and round logs. Thinning of native forests helps to preserve native tree species and is more sustainable than replacing native forest stands with mono-species plantations to produce timber. This study aimed to explore the effects of native forest thinning on soil-plant carbon (C) and nitrogen (N) dynamics in two experimental sites, Esk (5\u00a0years post-thinning) and Herberton (7\u00a0years post-thinning), situated in Queensland, Australia. The two sites had different thinning regimes. The final stocking rates varied between 75 and 200 stems ha\u22121 at Esk and between 250 and 400 stems ha\u22121 at Herberton. The thinned plots were compared to un-thinned plots. Soil samples were collected to measure labile C and N. Leaf samples were collected from C. variegata and C. citriodora in Esk and Herberton respectively. Thinning did not change soil total C, total N, \u03b415N and inorganic N at either Esk or Herberton. However, at Esk, intensive thinning resulted in decreases in water soluble total N (WSTN). Foliar \u03b413C did not vary with respect to thinning whereas foliar \u03b415N values were more enriched in thinned areas than those of un-thinned plots. The stepwise linear regression indicated that both foliar total N and \u03b415N were explained mainly by soil TN and WSTN. Thinning did not change soil C and N most likely due to the retention of thinned materials on site and their incorporation into soil. Foliar \u03b413C was not thinning-dependent due to homeostatic maintenance of the ratio of intercellular to ambient CO2 concentrations during photosynthesis. In our study, soil N was not a limiting factor for foliar N, however, foliar N was mainly driven by WSTN which may foreshadow a possible N limitation in severely thinned plots in the long term. We conclude that forest thinning does not decrease soil C and N availability in native Corymbia forests for several years post-thinning if the thinned materials are retained on site.", "keywords": ["570", "Corymbia spp", "Inorganic nitrogen", "stable isotopes", "veterinary and food sciences", "eucalyptus spp", "Other environmental sciences not elsewhere classified", "FoR 06 (Biological Sciences)", "Stable isotopes", "Farm forestry", "580", "Agricultural", "farm forestry", "FoR 07 (Agricultural and Veterinary Sciences)", "inorganic nitrogen", "04 agricultural and veterinary sciences", "15. Life on land", "corymbia spp", "Environmental sciences", "Biological sciences", "Eucalyptus spp", "070501 Agroforestry", "Water soluble total N and C", "0401 agriculture", " forestry", " and fisheries", "water soluble total N and C", "FoR 05 (Environmental Sciences)"]}, "links": [{"href": "https://doi.org/10.1007/s11104-016-3052-5"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-016-3052-5", "name": "item", "description": "10.1007/s11104-016-3052-5", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-016-3052-5"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-09-10T00:00:00Z"}}, {"id": "10.1007/s11104-016-3073-0", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:14:52Z", "type": "Journal Article", "created": "2016-10-10", "title": "Response Of Soil Microbial Community To Afforestation With Pure And Mixed Species", "description": "\u00a9 2016, Springer International Publishing Switzerland.Objectives: Afforestation changes soil chemical properties over several decades. In contrast, microbial community structure can be shifted within the first decade and so, the direct effects of tree species can be revealed. The aim of this study was to determine the alteration of soil microbial community composition 10\u00a0years after afforestation by trees with contrasting functional traits. Methods: The study was conducted at the BangorDIVERSE temperate forest experiment. Soil samples were collected under single, two and three species mixtures of alder and birch, beech and oak - early and secondary successional species, respectively, and contiguous agricultural field. Soil was analysed for total carbon (C) and nitrogen (N) contents, and microbial community structure (phospholipid fatty acids (PLFAs) analysis). Results and conclusions: The total PLFAs content (370\u2013640\u00a0nmol\u00a0g\u22121soil) in forest plots increased for 30 to 110\u00a0% compared to the agricultural soil (290\u00a0nmol\u00a0g\u22121soil). In contrast, soil C, N and C/N ratios were altered over 10\u00a0years much less - increased only up to 20\u00a0% or even decreased (for beech forest). Afforestation increased bacterial PLFAs by 20\u2013120\u00a0%, whereas it had stronger impact on the development of fungal communities (increased by 50\u2013200\u00a0%). These effects were proved for all forests, but were more pronounced under the monocultures compared to mixtures. This indicates that species identity has a stronger effect than species diversity. Principal component analysis of PLFAs revealed that under mono and three species mixtures similar microbial communities were formed. In contrast, gram-positive PLFAs and actinomycete PLFAs contributed mainly to differentiation of two species mixtures from other forests. Thus, at the early afforestation stage: i) soil biological properties are altered more than chemical, and ii) tree species identity affects more than species amount on both processes.", "keywords": ["2. Zero hunger", "570", "Microbial biomarkers", "Plant microbial interactions", "Soil solution", "Tree identity", "0401 agriculture", " forestry", " and fisheries", "Woodland", "04 agricultural and veterinary sciences", "15. Life on land", "Land use change", "Ammonium and nitrate", "Forest composition"]}, "links": [{"href": "https://doi.org/10.1007/s11104-016-3073-0"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-016-3073-0", "name": "item", "description": "10.1007/s11104-016-3073-0", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-016-3073-0"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-10-10T00:00:00Z"}}, {"id": "10.1007/s11104-021-05133-2", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-26T16:14:53Z", "type": "Journal Article", "created": "2021-09-12", "title": "In situ laser manipulation of root tissues in transparent soil", "description": "AbstractAimsLaser micromanipulation such as dissection or optical trapping enables remote physical modification of the activity of tissues, cells and organelles. To date, applications of laser manipulation to plant roots grown in soil have been limited. Here, we show laser manipulation can be applied in situ when plant roots are grown in transparent soil.
MethodsWe have developed a Q-switched laser manipulation and imaging instrument to perform controlled dissection of roots and to study light-induced root growth responses. We performed a detailed characterisation of the properties of the cutting beams through the soil, studying dissection and optical ablation. Furthermore, we also studied the use of low light doses to control the root elongation rate of lettuce seedlings (Lactuca sativa) in air, agar, gel and transparent soil.
ResultsWe show that whilst soil inhomogeneities affect the thickness and circularity of the beam, those distortions are not inherently limiting. The ability to induce changes in root elongation or complete dissection of microscopic regions of the root is robust to substrate heterogeneity and microscopy set up and is maintained following the limited distortions induced by the transparent soil environment.
ConclusionsOur findings show that controlled in situ laser dissection of root tissues is possible with a simple and low-cost optical set-up. We also show that, in the absence of dissection, a reduced laser light power density can provide reversible control of root growth, achieving a precise \uffe2\uff80\uff9cpoint and shoot\uffe2\uff80\uff9d method for root manipulation.Studies on tree CH4 exchange in boreal forests regarding seasonality and role of tree canopies are rare. We aimed to quantify the contribution of boreal trees to the forest CH4 budget during spring leaf-out and to reveal the role of microbes in the CH4 exchange.
MethodsMethane fluxes of downy birch and Norway spruce (Betula pubescens and Picea abies) growing on fen and upland sites were measured together with soil CH4 flux, environmental variables and microbial abundances involved in the CH4 cycle. Tree CH4 fluxes were studied from three stem heights and from shoots.
ResultsThe trees emitted CH4 with higher stem emissions detected from birch and higher shoot emissions from spruce. The stem CH4 emissions from birches at the fen were high (mean 45\uffc2\uffa0\uffc2\uffb5g\uffc2\uffa0m\uffe2\uff88\uff922\uffc2\uffa0h\uffe2\uff88\uff921), decreasing with stem height. Their dynamics followed soil temperature, suggesting the emitted CH4 originated from methanogenic activity, manifested in high mcrA gene copy numbers, in the peat soil. Methanogens were below the quantification limit in the tree tissues. Upscaled tree CH4 emissions accounted for 22% of the total CH4 emissions at the fen.
ConclusionsThe variation in stem CH4 flux between the trees and habitats is high, and the emissions from high-emitting birches increase as the spring proceeds. The lack of detection of methanogens or methanotrophs in the aboveground plant tissues suggests that these microbes did not have a significant role in the observed tree-derived fluxes. The stem-emitted CH4 from birches at the fen is presumably produced microbially in the soil.
", "keywords": ["0301 basic medicine", "570", "550", "Methanogens", "LIVING TREES", "Trees", "03 medical and health sciences", "Methanotrophs", "METHANE EMISSIONS", "SAP FLOW", "Boreal forest", "Waterlogging", "PRECURSOR", "0303 health sciences", "BIOMASS EQUATIONS", "NORWAY SPRUCE", "Forestry", "Methane fux", "15. Life on land", "Environmental sciences", "METHANOTROPHS", "13. Climate action", "RADIATION", "Methane flux", "VEGETATION", "COMMUNITIES"]}, "links": [{"href": "https://link.springer.com/content/pdf/10.1007/s11104-022-05447-9.pdf"}, {"href": "https://doi.org/10.1007/s11104-022-05447-9"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-022-05447-9", "name": "item", "description": "10.1007/s11104-022-05447-9", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-022-05447-9"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-05-24T00:00:00Z"}}, {"id": "10.1007/s11104-023-06151-y", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:14:53Z", "type": "Journal Article", "created": "2023-07-26", "title": "Smart soils track the formation of pH gradients across the rhizosphere", "description": "Abstract AimsOur understanding of the rhizosphere is limited by the lack of techniques for in situ live microscopy. Current techniques are either destructive or unsuitable for observing chemical changes within the pore space. To address this limitation, we have developed artificial substrates, termed smart soils, that enable the acquisition and 3D reconstruction of chemical sensors attached to soil particles.
MethodsThe transparency of smart soils was achieved using polymer particles with refractive index matching that of water. The surface of the particles was modified both to retain water and act as a local sensor to report on pore space pH via fluorescence emissions. Multispectral signals were acquired from the particles using a light sheet microscope, and machine learning algorithms predicted the changes and spatial distribution in pH at the surface of the smart soil particles.
ResultsThe technique was able to predict pH live and in situ within \uffc2\uffb1\uffe2\uff80\uff890.5 units of the true pH value. pH distribution could be reconstructed across a volume of several cubic centimetres around plant roots at 10\uffc2\uffa0\uffce\uffbcm resolution. Using smart soils of different composition, we revealed how root exudation and pore structure create variability in chemical properties.
ConclusionSmart soils captured the pH gradients forming around a growing plant root. Future developments of the technology could include the fine tuning of soil physicochemical properties, the addition of chemical sensors and improved data processing. Hence, this technology could play a critical role in advancing our understanding of complex rhizosphere processes.
", "keywords": ["/dk/atira/pure/subjectarea/asjc/1100/1111", "light sheet microscopy", "0301 basic medicine", "570", "0303 health sciences", "name=Soil Science", "/dk/atira/pure/subjectarea/asjc/1100/1110", "Sensing soil", "live imaging", "15. Life on land", "root", "530", "[SDE.BE] Environmental Sciences/Biodiversity and Ecology", "03 medical and health sciences", "Root", "13. Climate action", "Rhizosphere", "Light sheet microscopy", "name=Plant Science", "rhizosphere", "[SDV.SA.SDS] Life Sciences [q-bio]/Agricultural sciences/Soil study", "Live imaging"]}, "links": [{"href": "https://doi.org/10.1007/s11104-023-06151-y"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-023-06151-y", "name": "item", "description": "10.1007/s11104-023-06151-y", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-023-06151-y"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-07-26T00:00:00Z"}}, {"id": "10.1007/s11104-024-06756-x", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-07-26T16:14:53Z", "type": "Journal Article", "created": "2024-06-01", "title": "CH4 transport in wetland plants under controlled environmental conditions \u2013 separating the impacts of phenology from environmental variables", "description": "Abstract Background and AimsMethane (CH4) fluxes at peatland plant surfaces are net results of transport of soil-produced CH4 and within-plant CH4 production and consumption, yet factors and processes controlling these fluxes remain unclear. We aimed to assess the effects of seasonality, environmental variables, and CH4 cycling microbes on CH4 fluxes from characteristic fen species.
MethodsFour species (Carex rostrata, Menyanthes trifoliata, Betula nana, Salix lapponum) were selected, and their CH4 fluxes determined in climate-controlled environments with three mesocosms per growing season per species. Microbial genes for CH4 cycling were analysed to check the potential for within-plant CH4 production and oxidation. Two extra experiments were conducted: removal of C. rostrata leaves to identify how leaves constrain CH4 transport, and a labelling experiment with S. lapponum to distinguish between plant-produced and soil-produced CH4 in the plant flux.
ResultsAll species showed seasonal variability in CH4 fluxes. Higher porewater CH4 concentration increased fluxes from C. rostrata and M. trifoliata, decreased fluxes from S. lapponum, and did not affect fluxes from B. nana. Air temperature only and negatively affected CH4 flux from C. rostrata. Light level did not impact CH4 fluxes. Both methanogens and methanotrophs were detected in shoots of S. lapponum and M. trifoliata, methanotrophs in B. nana, and neither in C. rostrata.
ConclusionOur study demonstrates that the seasonal phase of the plants regulates the CH4 fluxes they mediate across species. The detection of methanogens and methanotrophs in herbs and shrubs suggests that microbial processes may contribute to their CH4 fluxes.
", "keywords": ["0301 basic medicine", "570", "0303 health sciences", "metanotrofit", "varvut", "Herbs", "11831 Plant biology", "metaani", "Environmental sciences", "Controlled environments", "Microbes", "03 medical and health sciences", "Phenology", "suot", "Plant-mediated CH fluxes", "suokasvillisuus", "Shrubs", "metanogeenit", "sarat"]}, "links": [{"href": "https://doi.org/10.1007/s11104-024-06756-x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-024-06756-x", "name": "item", "description": "10.1007/s11104-024-06756-x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-024-06756-x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-06-01T00:00:00Z"}}, {"id": "10.1007/s11104-024-06959-2", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:14:53Z", "type": "Journal Article", "created": "2024-11-01", "title": "Tree functional group mediates the effects of nutrient addition on soil nutrients and fungal communities beneath decomposing wood", "description": "\u00a9 The Author(s), under exclusive licence to Springer Nature Switzerland AG 2024.Background: Deadwood contains a large reservoir of carbon and nutrients in forest ecosystems, its decomposition has considerable effects on forest soil chemistry and biota. Tree functional group and nutrient inputs both have a significant influence on wood decomposition rates. However, little is known about how these factors interactively influence soil biogeochemistry through wood decomposition. Methods: We examined the effects of nitrogen (N) and phosphorus (P) addition on wood decomposition of different angiosperm and gymnosperm tree species in a three-year period in a subtropical forest. We explored the outcomes for the underlying soil nutrients, microbial biomass, and saprotrophic fungal communities. Result: We found that P addition, rather than N, significantly increased total C, P, as well as microbial biomass C and P concentrations in the soil beneath deadwood. These effects were particularly pronounced in the soil beneath angiosperm wood compared to gymnosperm wood, likely related to the higher decomposition rates of angiosperm wood and its sensitivity to P. Similarly, the presence and abundance of soil saprotrophic fungal communities was strongly associated with P addition, where specific fungal responses were more pronounced under angiosperm wood than gymnosperm wood. Conclusion: Our study underscores the pivotal role of tree functional group in modulating the response of soil nutrient dynamics and fungal community structure beneath decomposing wood in a subtropical forest. These insights are critical for developing predictive models of soil nutrient cycles, which can help manage forest ecosystems more effectively in the face of global environmental changes.", "keywords": ["[SDV.SA]Life Sciences [q-bio]/Agricultural sciences", "Soil nutrient concentrations", "Carbon cycling", "570", "[SDV.SA] Life Sciences [q-bio]/Agricultural sciences", "Saprotrophic fungi", "Wood decomposition", "Tree functional group", "630", "Nutrient addition experiment"]}, "links": [{"href": "https://doi.org/10.1007/s11104-024-06959-2"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11104-024-06959-2", "name": "item", "description": "10.1007/s11104-024-06959-2", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-024-06959-2"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-11-01T00:00:00Z"}}, {"id": "10.1007/s11284-013-1064-7", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:14:56Z", "type": "Journal Article", "created": "2013-06-25", "title": "Flower Production Of Aster Tripolium Is Affected By Behavioral Differences In Livestock Species And Stocking Densities: The Role Of Activity And Selectivity", "description": "AbstractSemi\uffe2\uff80\uff90natural grasslands are an important habitat for endangered plant and animal species. In grasslands, low\uffe2\uff80\uff90intensity livestock grazing is frequently applied as a tool for nature conservation. We aim to investigate how different livestock species in various densities influence the state and flower production of a single plant species by selective defoliation and/or trampling. We hypothesized that (1) moderate stocking densities would cause more damage than low, and that (2) horses would cause more damage than cattle due to their higher activity. The experiment took place in a salt marsh in the Netherlands where grazing treatments with horses and cattle in two stocking densities were installed. Damage to individual Aster tripolium plants and number of flower heads were recorded at the end of the grazing season in late September. We found (1) more damage and fewer flower heads in moderate stocking densities compared to low densities. However, a reduction of flower heads by higher stocking densities was less clear with cattle. No clear difference (2) between livestock species was found, due to opposite trends in moderate and low densities. At low stocking densities, cattle caused more damage by selective defoliation. At moderate densities, horses caused more damage, because of their higher mobility, which led to damage by trampling. We conclude that the response of Aster to grazing is strongly affected by behavioral differences between livestock species. Grazing experiments and management schemes for semi\uffe2\uff80\uff90natural grasslands should therefore not only consider stocking densities, but also livestock species to reach desired conservation goals.
", "keywords": ["0106 biological sciences", "2. Zero hunger", "570", "Salt marsh", "AVAILABILITY", "WADDEN SEA", "VEGETATION CHANGE", "EUROPAEA L", "15. Life on land", "Horse", "01 natural sciences", "630", "Grazing", "REPRODUCTION", "Semi-natural grassland", "SALT-MARSH", "RESOURCE", "Cattle", "TOLERANCE", "HERBIVORY", "PERENNIAL HERB"]}, "links": [{"href": "https://doi.org/10.1007/s11284-013-1064-7"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecological%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11284-013-1064-7", "name": "item", "description": "10.1007/s11284-013-1064-7", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11284-013-1064-7"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-06-26T00:00:00Z"}}, {"id": "10.1007/s11368-010-0191-9", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-07-26T16:14:57Z", "type": "Journal Article", "created": "2010-03-02", "title": "Soil Soluble Organic Carbon And Nitrogen Pools Under Mono- And Mixed Species Forest Ecosystems In Subtropical China", "description": "Purpose The objective of the present study was to assess the differences in soil total C and N, microbial biomass C and N, soil soluble organic C and N among eight mono- and mixed species forest ecosystems (18-year-old restoration) in subtropical China.", "keywords": ["Environmental sciences", "Earth sciences", "Agricultural", "570", "veterinary and food sciences", "550", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "Soil sciences not elsewhere classified"]}, "links": [{"href": "https://doi.org/10.1007/s11368-010-0191-9"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Soils%20and%20Sediments", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11368-010-0191-9", "name": "item", "description": "10.1007/s11368-010-0191-9", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11368-010-0191-9"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-03-03T00:00:00Z"}}, {"id": "10.1007/s11368-010-0238-y", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-07-26T16:14:57Z", "type": "Journal Article", "created": "2010-04-29", "title": "Soil Microbial Biomass, Activity And Community Composition In Adjacent Native And Plantation Forests Of Subtropical Australia", "description": "Purpose Soil nitrogen (N) availability is a critical determinant of plantation productivity in subtropical Australia and is influenced by the soil microbial community. The size, structure and function of the soil microbial community can be impacted by land-use change and residue management. The objectives of this study were to examine the impact of land-use change from (1) native forest (NF) to first rotation (1R) hoop pine plantation and (2) 1R hoop pine plantation to second rotation (2R) hoop pine plantation on the soil microbial community. The impact of residue management on the soil microbial community was also investigated in the 2R forest, where soil microbial parameters were measured in tree rows (2R-T) and windrows (2R-W). In addition, relationships between soil microbial parameters and soil N parameters were investigated.", "keywords": ["Environmental sciences", "2. Zero hunger", "Earth sciences", "Agricultural", "570", "veterinary and food sciences", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "Soil sciences not elsewhere classified", "630"]}, "links": [{"href": "https://doi.org/10.1007/s11368-010-0238-y"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Soils%20and%20Sediments", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11368-010-0238-y", "name": "item", "description": "10.1007/s11368-010-0238-y", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11368-010-0238-y"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-04-30T00:00:00Z"}}, {"id": "10.1007/s11368-016-1602-3", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-07-26T16:14:58Z", "type": "Journal Article", "created": "2016-11-24", "title": "Plant-Soil Interaction Affects The Mineralization Of Soil Organic Carbon: Evidence From 73-Year-Old Plantations With Three Coniferous Tree Species In Subtropical Australia", "description": "Plantation is an important strategy for forest restoration and carbon (C) storage. Plantations with different tree species could significantly affect soil properties, including soil pH, soil nutrient content, soil microbial activities, and soil dissolved organic C. Changes in these abiotic and biotic factors could regulate mineralization of soil organic C (SOC). However, it remains unclear to what extent these factors affect the mineralization of SOC under different tree species plantations. Soil was collected at 0\u201310\u00a0cm depth from plantations with Pinus elliottii Engelm. var. elliottii, Araucaria cunninghamii, and Agathis australis, respectively, in southeast Queensland, Australia. Soil samples were assayed for soil organic C; organic N and mineralization of SOC; soil particle size; total C, N, and P; and pH. In addition, a 42-day laboratory incubation with substrate additions was done to examine the influence of different substrates and their combinations on bio-available organic C. Our results suggested that SOC mineralization was mainly determined by soil pH and soil C content among plantations with different tree species, whereas SOC mineralization was not correlated with soil N and P contents. These results were further confirmed by the substrate addition experiments. SOC mineralization of soils from slash pine showed greater response to C (glucose) addition than soils from other two plantations, which suggested significant differences in SOC mineralization among plantations with different tree species. However, neither N addition nor P addition had significant effects on SOC mineralization. Our results indicated that plantations with different tree species substantially affect the mineralization and stability of soil organic C pool mainly by soil pH and soil C content.", "keywords": ["Environmental sciences", "Earth sciences", "Agricultural", "570", "Soil biology", "veterinary and food sciences", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "630"]}, "links": [{"href": "https://doi.org/10.1007/s11368-016-1602-3"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Soils%20and%20Sediments", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11368-016-1602-3", "name": "item", "description": "10.1007/s11368-016-1602-3", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11368-016-1602-3"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-11-24T00:00:00Z"}}, {"id": "10.1007/s11829-012-9234-z", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:15:00Z", "type": "Journal Article", "created": "2012-11-17", "title": "Effects Of Drought, Temperature, Herbivory, And Genotype On Plant-Insect Interactions In Soybean (Glycine Max)", "description": "Climate change is predicted to cause continued increases in global temperatures, greater variability in precipitation and in some cases, more frequent insect pest outbreaks. Here we seek to understand how abiotic and biotic stresses associated with climate change can affect plant-herbivore interactions in a model crop species (soybean, Glycine max (L.) Merr.) by answering three questions: (1) Do the combined effects of abiotic and biotic stresses associated with climate change cause synergistic negative effects on plant biomass? (2) Can abiotic stress affect resistance of plants to insect herbivores? (3) Does genetic variation in plant traits modify a plant\u2019s response to stress? We performed three experiments in controlled growth environments using up to 51 soybean genotypes selected to vary in numerous traits associated with drought and resistance against pests (e.g., insect herbivores, nematodes, and pathogenic fungi), and up to 3 generalist-feeding herbivorous noctuid moth species (Helicoverpa zea, Heliothis virescens, and Spodoptera exigua) that commonly feed on soybean in North America. Drought and herbivory had the largest and the most consistent negative effects on plant performance, reducing the above- and below-ground biomass by 10-45 %, whereas increased temperature had little to no effect on plants. Drought also increased susceptibility to generalist noctuid herbivores, but these results varied dramatically in magnitude and direction among plant genotypes. Our experiments show that the effects of abiotic and biotic stress on soybean biomass were largely due to the additive effects of these stresses, and there exists substantial genetic variation in the soybean germplasm pool we studied that could be used as a source of parental stock in breeding new crops that can more effectively tolerate and resist the combined negative effects of insect herbivory and drought.", "keywords": ["2. Zero hunger", "0301 basic medicine", "570", "0303 health sciences", "15. Life on land", "Herbivore resistance", "630", "6. Clean water", "Legume", "03 medical and health sciences", "Pulsed stress hypothesis", "Plant defense", "13. Climate action", "Plant stress hypothesis", "Wilt avoidance"], "contacts": [{"organization": "Grinnan, Rose, Carter, Thomas E., Jr., Johnson, Marc T. J.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1007/s11829-012-9234-z"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Arthropod-Plant%20Interactions", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11829-012-9234-z", "name": "item", "description": "10.1007/s11829-012-9234-z", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11829-012-9234-z"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-11-18T00:00:00Z"}}, {"id": "10.1007/s11538-019-00656-3", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:14:59Z", "type": "Journal Article", "created": "2019-08-22", "title": "Multiple Scale Homogenisation of Nutrient Movement and Crop Growth in Partially Saturated Soil", "description": "In this paper, we use multiple scale homogenisation to derive a set of averaged macroscale equations that describe the movement of nutrients in partially saturated soil that contains growing potato tubers. The soil is modelled as a poroelastic material, which is deformed by the growth of the tubers, where the growth of each tuber is dependent on the uptake of nutrients via a sink term within the soil representing root nutrient uptake. Special attention is paid to the reduction in void space, resulting change in local water content and the impact on nutrient diffusion within the soil as the tubers increase in size. To validate the multiple scale homogenisation procedure, we compare the system of homogenised equations to the original set of equations and find that the solutions between the two models differ by [Formula: see text]. However, we find that the computation time between the two sets of equations differs by several orders of magnitude. This is due to the combined effects of the complex three-dimensional geometry and the implementation of a moving boundary condition to capture tuber growth.", "keywords": ["Crops", " Agricultural", "2. Zero hunger", "0301 basic medicine", "570", "Water", "Mathematical Concepts", "Nutrients", "04 agricultural and veterinary sciences", "15. Life on land", "Models", " Biological", "Elasticity", "510", "Diffusion", "Plant Tubers", "Soil", "03 medical and health sciences", "0401 agriculture", " forestry", " and fisheries", "Original Article", "Porosity", "Solanum tuberosum"]}, "links": [{"href": "https://eprints.soton.ac.uk/433288/1/Simon_3.pdf"}, {"href": "http://link.springer.com/content/pdf/10.1007/s11538-019-00656-3.pdf"}, {"href": "https://doi.org/10.1007/s11538-019-00656-3"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Bulletin%20of%20Mathematical%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s11538-019-00656-3", "name": "item", "description": "10.1007/s11538-019-00656-3", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11538-019-00656-3"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-08-22T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=570&offset=50&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=570&offset=50&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": "prev", "title": "items (prev)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=570&offset=0", "hreflang": "en-US"}, {"rel": "next", "type": "application/geo+json", "title": "items (next)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=570&offset=100", "hreflang": "en-US"}], "numberMatched": 719, "numberReturned": 50, "distributedFeatures": [], "timeStamp": "2026-07-26T20:12:04.570108Z"}