文献类型：期刊文献

英文题名：Effects of Forest Gap on Soil Microbial Communities in an Evergreen Broad-Leaved Secondary Forest

作者：Chen, Shiyou[1] Jiang, Chunqian[1] Bai, Yanfeng[1] Wang, Hui[1] Jiang, Chunwu[2] Huang, Ke[3] Guo, Lina[1] Zeng, Suping[1] Wang, Shuren[1]

第一作者：Chen, Shiyou

通信作者：Jiang, CQ[1]

机构：[1]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[2]Anhui Acad Forestry, Hefei 230031, Peoples R China;[3]Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, Huitong Expt Stn Forest Ecol, Shenyang 110016, Peoples R China

年份：2022

卷号：13

期号：12

外文期刊名：FORESTS

收录：;EI(收录号：20225213314638);Scopus(收录号：2-s2.0-85144623705);WOS:【SCI-EXPANDED(收录号:WOS:000901261900001)】；

基金：This research was funded by the National Key Research and Development Program of China (2022YFF1303000) (2022YFF1303005).

语种：英文

外文关键词：gap size; soil microbe; soil chemical property; forest management; PLFA analysis; spatial distribution

摘要：Forest gaps play a crucial role in community succession and assembly in forest ecosystems; therefore, they have recently been recognized and implemented as effective forest management practice all over the world. Forest gaps are commonly created as small disturbances in secondary forests to improve forest regeneration, nutrient cycling, ecosystem functioning, and biodiversity. The objective of this study was to investigate the responses of the physico-chemical and biological properties and microbial communities in soil to different sizes of forest gaps-including small gaps (60-80 m(2)), medium gaps (130-160 m(2)), and large gaps (270-300 m(2))-and to examine the driving factors that influence soil microbial community structure and composition. The results show that Gram-positive bacteria, Gram-negative bacteria, fungi, arbuscular mycorrhizal fungi (AMF), and actinomycetes were mainly aggregated in the gaps, and the structural diversity of soil microbial communities was related to the gap size (p < 0.05). The soil microbial community diversity increased and then decreased with an increase in gap size. Moreover, the effects of the available phosphorus, soil pH, soil water content, available potassium, nitrate nitrogen and ammonium nitrogen on changes in microbial biomass were significant (p < 0.05). The gap area and gap position and their combined interactions also had significant effects on soil nutrients, which impacts the soil microbial community. Medium gaps (130-160 m(2)) always significantly improved the availability of soil nutrients, and good management practices in secondary forests can provide effective microenvironments for soil microbes.