文献类型：期刊文献

英文题名：Exotic earthworms maintain soil biodiversity by altering bottom-up effects of plants on the composition of soil microbial groups and nematode communities

作者：Shao, Yuanhu[1,2] Zhang, Weixin[1,2] Eisenhauer, Nico[3,4] Liu, Tao[2,5] Ferlian, Olga[3,4] 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];Fu, SL[2]

机构：[1]Henan Univ, Key Lab Geospatial Technol Middle & Lower Yellow, Minist Educ, Coll Environm & Planning, 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 5e, D-04103 Leipzig, Germany;[4]Univ Leipzig, Inst Biol, Deutsch Pl 5e, 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：2019

卷号：55

期号：3

起止页码：213-227

外文期刊名：BIOLOGY AND FERTILITY OF SOILS

收录：;Scopus(收录号：2-s2.0-85060488098);WOS:【SCI-EXPANDED(收录号:WOS:000461142200003)】；

基金：This study was funded by the Natural Science Foundation of China (31470559), Zhongyuan Scholar Program (182101510005), and "Heshan National Field Research Station of Forest Ecosystem". NE and OF acknowledge support from the European Research Council (ERC) 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：Soil nematodes; Soil micro-food webs; Exotic earthworms; Bottom-up effects; Energy flux; Microbial PLFAs

摘要：Bottom-up effects of plants on soil communities can be modified by the activity of exotic earthworms, by altering resource availability for soil food webs through feeding, burrowing, and casting activities. The present study explored effects of plants (planting of shrubs) on soil micro-food webs (composition of soil microbial and nematode communities), and whether these effects were altered by the activity of exotic earthworms (exotic earthworms addition). Planted shrubs resulted in a non-significant increase of bacterial biomass and significantly increased the abundance of different nematode trophic groups and total nematode biomass, indicating that planted shrubs had significant bottom-up effects on soil bacteria and nematodes. Planted shrubs decreased nematode diversity, evenness, and richness, but increased nematode dominance in the plots where the abundance of exotic earthworms was not amended. By contrast, these effects of shrub presence on soil biodiversity were not found in the plots that received exotic earthworms. In addition, planted shrubs increased the total energy flux to the nematode community. By contrast, the elevated activity of exotic earthworms mitigated the increase in total energy flux to nematodes in the presence of shrubs, and increased the ratio of fungal to bacterial PLFAs. Both of these changes indicate reduced energy flux in the plots with added exotic earthworms. Nematode diversity decreased, while nematode dominance increased with increasing total energy flux to nematodes, probably because few species benefited from high energy flux. Our study indicates that exotic earthworms can maintain soil biodiversity by reducing the energy flux through soil food webs.