文献类型：期刊文献

英文题名：The Structure and Species Co-Occurrence Networks of Soil Denitrifying Bacterial Communities Differ Between A Coniferous and A Broadleaved Forests

作者：Chen, Jie[1] Li, Jiajia[2] Shen, Weijun[3] Xu, Han[1] Li, Yide[1] Luo, Tushou[1]

第一作者：陈洁

通信作者：Chen, J[1];Li, JJ[2]

机构：[1]Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[2]Pingdingshan Univ, Coll Tourism & Planning, Pingdingshan 467000, Peoples R China;[3]Chinese Acad Sci, South China Bot Garden, Key Lab Vegetat Restorat & Management Degraded Ec, 723 Xingke Rd, Guangzhou 510650, Guangdong, Peoples R China

年份：2019

卷号：7

期号：9

外文期刊名：MICROORGANISMS

收录：;Scopus(收录号：2-s2.0-85074339983);WOS:【SCI-EXPANDED(收录号:WOS:000489131300088)】；

基金：This study was conducted under the financial supports of the Central Public-interest Scientific Institution Basal Research Fund (CAFYBB2018SZ003, CAFYBB2019SZ003), National Natural Science Foundation of China (31425005) and the National Ten Thousand Talents Plan.

语种：英文

外文关键词：Soil N cycling; functional gene; microbial network; artificial plantation; forest degradation

摘要：Acacia mangium (AM) and Pinus massoniana (PM) are widely planted in tropical regions, whereas their effects on soil microbial communities remain unclear. We did a comprehensive investigation of soil denitrifying bacterial communities in AM and PM monoculture plantations in Southern China based on the high throughput sequencing data of their functional genes: nirK, nirS, and nosZ. The average abundance of nosZ (1.3 x 10(7)) was significantly higher than nirS (5.6 x 10(6)) and nirK (4.9 x 10(5)). Shannon estimator revealed a markedly higher alpha-diversity of nirS and nosZ communities in PM than in AM plantations. The AM and PM plantations were dominated by different nirS and nosZ taxa belonging to proteobacteria, actinobacteria, thermoleophilia, chloroflexia, and acidobacteria, while the dominant nirK taxa were mainly categorized into proteobacteria in both types of plantations. The structure of nirS and nosZ communities shifted substantially from AM to PM plantations with changes in soil moisture, NH4+, and microbial biomass nitrogen content. The species co-occurrence network of nirK community was better organized in a more modular manner compared to nirS and nosZ communities, and the network keystone species mostly occurred in PM plantations. These results indicated a highly species corporation of nirK community in response to environmental changes, especially in PM plantations. AM and PM plantations can form different soil denitrifying microbial communities via altering soil physicochemical properties, which may further affect soil N transformations.