文献类型：期刊文献

英文题名：Nitrogen-fixing tree species rather than tree species diversity shape soil nematode communities in subtropical plantations

作者：Ma, Jinhao[1,2] Luan, Junwei[1] Wang, Hui[2] Wu, Pengfei[3] Ye, Xiaodan[1,2] Wang, Yi[1] Ming, Angang[4] Liu, Shirong[2]

第一作者：Ma, Jinhao

通信作者：Liu, SR[1]

机构：[1]Beijing Bamboo & Rattan Sci & Technol, Inst Resources & Environm, Int Ctr Bamboo & Rattan, Key Lab Natl Forestry & Grassland Adm, Beijing 100102, Peoples R China;[2]Chinese Acad Forestry, Ecol & Nat Conservat Inst, Key Lab Forest Ecol & Environm, Natl Forestry & Grassland Adm, Beijing 100091, Peoples R China;[3]Southwest Minzu Univ, Inst Qinghai Tibetan Plateau, Chengdu 610041, Peoples R China;[4]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang 532600, Peoples R China

年份：2023

卷号：436

外文期刊名：GEODERMA

收录：;EI(收录号：20232414249739);Scopus(收录号：2-s2.0-85161632131);WOS:【SCI-EXPANDED(收录号:WOS:001020385400001)】；

基金：We would thank Yuqian Ye, Chaoying Li and Zhenzhen Shao for their assistance to laboratory analysis. This study was jointly supported by the National Natural Science Foundation of China (31930078) , the Funda- mental Research Funds of Chinese Academy of Forestry (CAFYBB2021ZW001) and the National Key Research and Development Program of China (2021YFD2200402, 2021YFD2200405) .

语种：英文

外文关键词：Tree species diversity; N-fixing tree species; Soil nematode communities; Subtropical plantation

摘要：Positive relationships between tree species diversity and soil communities are reported in many studies. However, the effects of tree species richness and nitrogen (N)-fixing tree species on soil fauna communities are not yet fully understood. Here, we conducted a field experiment to investigate changes in soil nematode communities under a gradient of tree species richness (e.g., 1, 2, 4 and 6 tree species) with N-fixing tree species (absence or presence). We found that N-fixing tree species strongly affected soil nematode trophic groups, and significantly increased the abundance of omnivore-predators and structure index via promoting more trophic links and multitrophic interactions, leading to a more stable and complex soil food web. In the presence of N-fixing tree species, tree species richness significantly increased the abundance and relative abundance of fungivores and the channel index, with the shift in soil energy channel through increased the C/N ratio of leaf litter. In contrast, tree species richness detrimentally affected the abundance of plant parasites due to the decline of leaf litter N content under the presence of N-fixing tree species. The results revealed that the bottom-up effects of N-fixing tree species on soil nematode community structure were crucial drivers in shaping nematode communities in subtropical plantations. Our study suggests that N-fixing tree species is more important than tree species richness to regulate soil nematode community structure and soil energy channel, and therefore, should be preferentially considered in multispecies forest plantations.