Negative responses of Collembola in a forest soil (Alptal,Switzerland) under experimentally increased N deposition |
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| Authors: | Guo-Liang Xu Patrick Schleppi Mai-He Li Sheng-Lei Fu |
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| Affiliation: | 1. Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Menglun, Yunnan 666303, China;2. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;1. Moscow Pedagogical State University, Moscow 129164, Russia;2. Forest Research Institute, Karelian Research Center, Russian Academy of Sciences, Petrozavodsk 185910, Russia;1. Laboratory of Ecology and Evolutionary Biology, and Yunnan Key Laboratory of Plant Reproductive Adaption and Evolutionary Ecology, Yunnan University, Kunming 650500, China;2. Jiangxi Key Laboratory for Restoration of Degraded Ecosystems & Watershed Ecohydrology, Nanchang Institute of Technology, Nanchang, Jiangxi 330099, China;3. Key Laboratory of Geospatial Technology for the Middle and Lower Yellow River Regions, College of Environment and Planning, Henan University, Kaifeng 475004, China;4. State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China;5. Department of Earth, Environmental and Geographic Sciences, University of British Columbia, 3333 University Way, Kelowna, B.C. V1V 1V7, Canada |
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| Abstract: | The response of specific groups of organisms, like Collembola to atmospheric nitrogen (N) deposition is still scarcely known. We investigated the Collembola community in a subalpine forest (Alptal, Switzerland) as subjected for 12 years to an experimentally increased N deposition (+25 on top of ambient 12 kg N ha?1 year?1). In the 0–5 cm soil layer, there was a tendency of total Collembola densities to be lower in N-treated than in control plots. The density of Isotomiella minor, the most abundant species, was significantly reduced by the N addition. A tendency of lower Collembola group richness was observed in N-treated plots. The Density-Group index (dDG) showed a significant reduction of community diversity, but the Shannon–Wiener index (H′) was not significantly affected by the N addition. The Collembola community can be considered as a bioindicator of N inputs exceeding the biological needs, namely, soil N saturation. |
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