{"type": "FeatureCollection", "features": [{"id": "10.1007/s11104-017-3281-2", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-20T16:14:46Z", "type": "Journal Article", "created": "2017-05-20", "title": "Increased Litter In Subtropical Forests Boosts Soil Respiration In Natural Forests But Not Plantations Of Castanopsis Carlesii", "description": "Changes in net primary productivity in response to climate change are likely to affect litter inputs to forest soil. However, feedbacks between changes in litter input and soil carbon dynamics remain poorly understood in tropical and subtropical forests. This study aims to test whether the effects of litter manipulation on soil respiration differ between natural and plantation forests. Soil respiration, soil properties, fine root biomass and enzyme activity were measured in adjacent plots with doubling vs. eliminating litter input in both natural and plantation forests of Castanopsis carlesii in southern China. After only 3\u00a0years of litter manipulation, the magnitude of change in soil respiration was greater in response to a doubling of the litter input (+24%) than to the elimination of litter input (\u221215%) in the natural forest, possibly due to a positive priming effect on decomposition of soil organic carbon (SOC). The quick and intense priming effect was corroborated by elevated enzyme activities for five of the six enzymes analyzed. In contrast, the response to litter removal (\u221231%) was greater than the response to litter addition (1%; not significant) in the plantation forest. The lack of positive priming in the plantation forest may be related to its lower soil fertility, which could not meet the demand of soil microbes, and to its high clay content, which protected SOC from microbial attack. The positive priming effect in the natural forest but not plantation forest of C. carlesii is also consistent with the significant declines in total soil carbon observed following litter addition in the natural forest but not the plantation forest. Increases in aboveground litter production may trigger priming effects and subsequently transfer more soil carbon to atmospheric CO2 in the natural forest but not in the plantation forest with low fertility. Changes in litter inputs resulting from global change drivers may have different impacts on natural and plantation forests.", "keywords": ["Litter addition", "Carbon cycling", "Subtropical forest", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Soil respiration", "04 agricultural and veterinary sciences", "Litter removal", "Priming effect", "15. Life on land"]}, "links": [{"href": "https://doi.org/10.1007/s11104-017-3281-2"}, {"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/s11104-017-3281-2", "name": "item", "description": "10.1007/s11104-017-3281-2", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-017-3281-2"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-05-20T00:00:00Z"}}, {"id": "10.1111/j.1365-2745.2010.01680.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-20T16:17:38Z", "type": "Journal Article", "created": "2010-05-27", "title": "Experimental Investigation Of The Importance Of Litterfall In Lowland Semi-Evergreen Tropical Forest Nutrient Cycling", "description": "Summary<p> 1.\uffe2\uff80\uff82The cycling of nutrients in litterfall is considered a key mechanism in the maintenance of tropical forest fertility but its importance has rarely been quantified experimentally.</p><p> 2.\uffe2\uff80\uff82We carried out a long\uffe2\uff80\uff90term (5\uffe2\uff80\uff83years), large\uffe2\uff80\uff90scale litter manipulation experiment in lowland semi\uffe2\uff80\uff90evergreen tropical forest to determine how changes in litterfall affect forest nutrient cycling. We hypothesized that: (i) long\uffe2\uff80\uff90term litter removal would decrease the forest\uffe2\uff80\uff99s nutrient supply; (ii) litter addition would increase the forest\uffe2\uff80\uff99s nutrient supply; (iii) soil and foliar nutrient concentrations would change in response to litter manipulation and would eventually affect above\uffe2\uff80\uff90ground productivity.</p><p> 3.\uffe2\uff80\uff82To test our hypotheses, we measured trunk growth, litterfall, and nutrient concentrations in live leaves, litter and soil in plots where litter was removed once a month (L\uffe2\uff88\uff92), litter was added once a month (L+) and controls (CT).</p><p> 4.\uffe2\uff80\uff82After 5\uffe2\uff80\uff83years, the concentration of nitrate in the soil and soil stocks of inorganic nitrogen were higher in the L+ plots and lower in the L\uffe2\uff88\uff92 plots compared to the controls. Ammonium concentrations in the soil were also lower in the L\uffe2\uff88\uff92 plots. Nitrogen in leaves and litter and the annual nitrogen return by litter were higher in the L+ plots, while potassium return was lower in the L\uffe2\uff88\uff92 plots. Surprisingly, our treatments had little effect on phosphorus in soil, leaves or litter, even though lowland tropical forests are generally thought to be largely phosphorus limited.</p><p> 5.\uffe2\uff80\uff82Trunk growth of large trees was not affected by litter manipulation but rainy season litterfall from 2003 to 2008 was 13% higher in the L+ plots compared to the controls.</p><p> 6.\uffe2\uff80\uff82Synthesis. Litter removal affected forest nutrient cycling and productivity less than expected, probably because the soil at our site is moderately fertile. However, litter addition increased litterfall indicating that some limitation of forest production was removed by litter addition. We expected strong effects of litter manipulation on phosphorus cycling; instead, we found a stronger effect on nitrogen cycling. Our results suggest that litter is an important source of nutrients, in particular nitrogen, to trees in this lowland semi\uffe2\uff80\uff90evergreen tropical forest.</p>", "keywords": ["tropical forest", "0106 biological sciences", "2. Zero hunger", "nutrient limitation", "potassium", "litterfall seasonality", "15. Life on land", "01 natural sciences", "nitrogen", "litter removal", "foliar nutrients", "litter manipulation", "soil nutrients", "phosphorus", "litterfall", "litter addition"]}, "links": [{"href": "https://doi.org/10.1111/j.1365-2745.2010.01680.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1365-2745.2010.01680.x", "name": "item", "description": "10.1111/j.1365-2745.2010.01680.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1365-2745.2010.01680.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-08-04T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Litter+addition&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=Litter+addition&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=Litter+addition&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Litter+addition&offset=2", "hreflang": "en-US"}], "numberMatched": 2, "numberReturned": 2, "distributedFeatures": [], "timeStamp": "2026-09-21T05:51:09.690878Z"}