文献类型：期刊文献

英文题名：Differential mechanisms underlying responses of soil bacterial and fungal communities to nitrogen and phosphorus inputs in a subtropical forest

作者：Li, Yong[1] Tian, Dashuan[2] Wang, Jinsong[2] Niu, Shuli[2] Tian, Jing[2] Ha, Denglong[3] Qu, Yuxi[3] Jing, Guangwei[3] Kang, Xiaoming[1] Song, Bing[4]

第一作者：李勇

通信作者：Kang, XM[1];Song, B[2]

机构：[1]Chinese Acad Forestry, Inst Wetland Res, Beijing Key Lab Wetland Serv & Restorat, Beijing, Peoples R China;[2]Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China;[3]Jigongshan Nat Reserve, Xinyang, Peoples R China;[4]Ludong Univ, Sch Resources & Environm Engn, Yantai, Peoples R China

年份：2019

卷号：7

期号：9

外文期刊名：PEERJ

收录：;Scopus(收录号：2-s2.0-85074205350);WOS:【SCI-EXPANDED(收录号:WOS:000484657600007)】；

基金：This study was financially supported by National Natural Science Foundation of China (Grant Nos. 41403073 and 31600356) and the Thousand Young Talents program to Shuli Niu. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

语种：英文

外文关键词：Nitrogen deposition; Phosphorus addition; Microbial diversity; Community composition; Amplicon sequencing; Subtropical forest; Soil bacteria and fungi

摘要：Atmospheric nitrogen (N) deposition and phosphorus (P) addition both can change soil bacterial and fungal community structure with a consequent impact on ecosystem functions. However, which factor plays an important role in regulating responses of bacterial and fungal community to N and P enrichments remains unclear. We conducted a manipulative experiment to simulate N and P inputs (10 g N . m(-2) . yr(-1) NH4NO3 or 10 g P . m(-2) . yr(-1) NaH2PO4) and compared their effects on soil bacterial and fungal species richness and community composition. The results showed that the addition of N significantly increased NH+4 and Al3+ by 99.6% and 57.4%, respectively, and consequently led to a decline in soil pH from 4.18 to 3.75 after a 5-year treatment. P addition increased Al3+ and available P by 27.0% and 10-fold, respectively, but had no effect on soil pH. N addition significantly decreased bacterial species richness and Shannon index and resulted in a substantial shift of bacterial community composition, whereas P addition did not. Neither N nor P addition changed fungal species richness, Shannon index, and fungal community composition. A structural equation model showed that the shift in bacterial community composition was related to an increase in soil acid cations. The principal component scores of soil nutrients showed a significantly positive relationship with fungal community composition. Our results suggest that N and P additions affect soil bacterial and fungal communities in different ways in subtropical forest. These findings highlight how the diversity of microbial communities of subtropical forest soil will depend on future scenarios of anthropogenic N deposition and P enrichment, with a particular sensitivity of bacterial community to N addition.