{"type": "FeatureCollection", "features": [{"id": "10.1016/j.agrformet.2012.11.020", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:15:13Z", "type": "Journal Article", "created": "2013-01-08", "title": "The Impact Of Changes In The Timing Of Precipitation On The Herbaceous Understorey Of Mediterranean Evergreen Oak Woodlands", "description": "Abstract   Climate change scenarios for the Iberian Peninsula predict increasing temperatures and increasingly variable precipitation regimes, which will challenge the sustainability and biodiversity of Mediterranean ecosystems such as the semi-natural evergreen oak woodlands.  To assess the effects of precipitation variability on productivity, species composition and vegetation gas exchange of the understorey vegetation in a typical managed cork oak woodland, a large-scale rainfall manipulation experiment was established. We studied the impacts of a change in the timing of precipitation events on this ecosystem, without altering total annual precipitation inputs. The two water manipulation treatments were: \u2018weekly watering treatment\u2019, where natural conditions were simulated with a normal dry period of 7 days, and \u20183-weekly watering treatment\u2019, with the normal dry period increased three-fold to 21 days.  Our experimental precipitation patterns resulted in significant differences in temporal soil moisture dynamics between the two treatments. Average soil water content (SWC) at 3\u00a0cm depth during the growing season was 16.1\u00a0\u00b1\u00a00.17% and 15.8\u00a0\u00b1\u00a00.18% in the weekly and 3-weekly watering treatments, respectively, with a mere 5% increase in the variability of SWC when extending the dry period from one to three weeks. Water infiltration into deeper soil layers (>50\u00a0cm) was significantly higher in the 3-weekly watering treatment as compared to the weekly watering treatment. This might be beneficial to Quercus suber, the tree component in this ecosystem, as its extensive tree root system enables water acquisition from deeper soil layers.  However, manipulation of the within-season precipitation variability, with a shift to fewer, but larger rain events, without change in total precipitation amount, had no significant effect on aboveground net primary productivity (ANPP), belowground net primary productivity (BNPP) and species composition, with average values of peak biomass of 385\u00a0g\u00a0m\u22122 and 222\u00a0g\u00a0m\u22122 for ANPP and BNPP, respectively.  The experimental precipitation patterns did not result in significant differences in the vegetation gas exchange between the two watering treatments. The CO2 and H2O exchange parameters correlated well with air temperature. In addition, evapotranspiration showed a good correlation with SWC.  Incorporating the data of SWC in the conceptual \u2018bucket model\u2019 showed that, independently of the watering regime, soil water availability during the life-cycle of these annual plants did not reach severe water stress conditions, which can explain the lack of a significant treatment effect in our study. In addition, our results showed that the annual plant community in these Mediterranean ecosystems is well adapted to short-term drought, through their phenological patterns and physiological adaptations.", "keywords": ["2. Zero hunger", "Mediterranean Ecosystem", "species composition", "precipitation variability", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "6. Clean water", "primary productivity", "climate change", "herbaceous understorey", "vegetation gas exchange", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.agrformet.2012.11.020"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agricultural%20and%20Forest%20Meteorology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.agrformet.2012.11.020", "name": "item", "description": "10.1016/j.agrformet.2012.11.020", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agrformet.2012.11.020"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-04-01T00:00:00Z"}}, {"id": "10.5061/dryad.s4mw6m9bc", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:19:52Z", "type": "Dataset", "title": "Divergent responses of grassland productivity and plant diversity to intra-annual precipitation variability across climate regions: A global synthesis", "description": "Global warming intensifies the hydrological cycle and may result in  changes in the frequency and intensity of precipitation events. Although  the effects of changes in precipitation amount and inter-annual  precipitation variability on terrestrial plant productivity and carbon  sequestration have been well studied, how intra-annual precipitation  variability affects terrestrial ecosystem function remains unclear. Here,  we synthesized field manipulative experiments from 71 publications to  quantify the effects of intra-annual precipitation variability increases  (IPVI) on community biomass and plant diversity in grasslands worldwide.  \u00a0At the global scale, we found that IPVI generally increased  grassland community aboveground biomass (AGB) by 6%, and decreased grass  biomass and soil ammonium nitrogen by 12% and 31%, respectively. IPVI  stimulated AGB, belowground biomass, and plant species richness in arid  regions, but not changed them in humid regions. Changes in AGB under IPVI  were related to changes in the biomass of plant functional groups, species  richness, and soil moisture. Structural equation modelling demonstrated  that that climate conditions (mean annual temperature and mean annual  precipitation) and background soil properties (soil sand content and soil  organic carbon content) jointly regulated grassland AGB responses to IPVI  across climate types. Synthesis: Overall, our study shows that grassland  productivity and diversity may increase under IPVI in arid climates, and  that humid grasslands may be highly resistant to the effects of IPVI.  These findings have important implications for understanding ecosystem  carbon cycling under global precipitation change scenarios.", "keywords": ["2. Zero hunger", "meta-analysis", "13. Climate action", "soil properties", "intra-annual precipitation variability increase", "15. Life on land", "grassland", "species richness", "aboveground biomass", "Soil water availability", "FOS: Natural sciences"], "contacts": [{"organization": "Su, Jishuai, Zhang, Yi, Xu, Fengwei,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.s4mw6m9bc"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.s4mw6m9bc", "name": "item", "description": "10.5061/dryad.s4mw6m9bc", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.s4mw6m9bc"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-05-16T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=precipitation+variability&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=precipitation+variability&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=precipitation+variability&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=precipitation+variability&offset=2", "hreflang": "en-US"}], "numberMatched": 2, "numberReturned": 2, "distributedFeatures": [], "timeStamp": "2026-09-21T23:47:02.873547Z"}