文献类型：期刊文献

英文题名：Plants mitigate detrimental nitrogen deposition effects on soil biodiversity

作者：Shao, Yuanhu[1,2] Liu, Tao[2,5] Eisenhauer, Nico[3,4] Zhang, Weixin[1,2] Wang, Xiaoli[6] Xiong, Yanmei[7] Liang, Chenfei[8] Fu, Shenglei[1,2]

第一作者：Shao, Yuanhu

通信作者：Fu, SL[1]

机构：[1]Henan Univ, Minist Educ, Coll Environm & Planning, Key Lab Geospatial Technol Middle & Lower Yellow, Kaifeng 475004, Peoples R China;[2]Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, South China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China;[3]German Ctr Integrat Biodivers Res iDiv, Deutsch Pl Se, D-04103 Leipzig, Germany;[4]Univ Leipzig, Inst Biol, Deutsch Pl Se, D-04103 Leipzig, Germany;[5]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[6]Qinghai Univ, Qinghai Acad Anim & Vet Sci, State Key Lab Plateau Ecol & Agr, Xining 810016, Qinghai, Peoples R China;[7]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[8]Zhejiang A&F Univ, Zhejiang Prov Key Lab Carbon Cycling Forest Ecosy, Linan 311300, Peoples R China

年份：2018

卷号：127

起止页码：178-186

外文期刊名：SOIL BIOLOGY & BIOCHEMISTRY

收录：;EI(收录号：20184205946822);Scopus(收录号：2-s2.0-85054640441);WOS:【SCI-EXPANDED(收录号:WOS:000449895600020)】；

基金：We are grateful to Yongxing Li for his help during soil sampling and Xiaohua Chen for his help on microarthropod identification. We also thank Prof. Xiaoming Zou and two anonymous reviewers for helpful comments. This work was supported by Natural Science Foundation of China (31470559), Natural Science Foundation of Guangdong Province (2015A030313783), Zhongyuan Scholar Program (182101510005). NE acknowledge support from the European Research Council under the European Union's Horizon 2020 research and innovation program (grant agreement no 677232 to NE). Further support came from the German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, funded by the German Research Foundation (FZT 118).

语种：英文

外文关键词：Nematodes; Nitrogen deposition; Soil biodiversity; Soil food webs; Soil microbial community

摘要：Anthropogenic nitrogen (N) deposition is an important component of global change and threatens terrestrial biodiversity. Most previous studies of the consequences of N deposition have focused on plant community responses and found that N deposition decreases plant diversity. However, the effects of N deposition on soil biodiversity and belowground biotic interactions remain poorly understood. We explored the changes in main soil food web components (microbes, nematodes, springtails, and mites) in response to elevated N deposition (60 kg N ha(-1) yr(-1), starting from 2012 to 2014), and whether these changes are altered by the presence of plants (planting of shrubs in 2008) in a two-factorial field mesocosm experiment with 16 equally-sized plots (1 x 2 m). Our results showed that elevated N deposition negatively affected soil bacteria, while fungi showed rather neutral responses. Specifically, N deposition decreased bacteria Shannon's diversity index H', richness, observed species abundance, bacterial activity, and resulted in a nonsignificant decrease of the relative abundance of rare bacterial taxa. By contrast, for fungi, only a nonsignificant decrease of richness was observed with N deposition. Importantly, those N deposition effects mostly occurred in the absence of planted shrubs. Moreover, shrub presence and N deposition also interactively affected the diversity of soil invertebrates, i.e., N deposition had little effect on them in the absence of planted shrubs, but resulted in an increase or a nonsignificant increase of soil invertebrate diversity in the presence of planted shrubs. Furthermore, N deposition did not affect the biomass/density of any soil food web component and biomass/density ratios related to soil food web structure regardless of absence or presence of planted shrubs; these indices were only affected by the presence of shrubs. Overall, these dissimilar responses of the diversity of soil microorganisms and animals to elevated N deposition indicate that plants are important mediators of N deposition effects on soil biodiversity. Thus, the present results may imply that an intact plant cover may mitigate detrimental N deposition effects on soil biodiversity.