文献类型：期刊文献

英文题名：Effects of secondary succession on soil fungal and bacterial compositions and diversities in a karst area

作者：Wang, Genzhu[1,2] Liu, Yuguo[3] Cui, Ming[3] Zhou, Ziyuan[1,2] Zhang, Qian[4] Li, Yajin[5] Ha, Wenxiu[6] Pang, Danbo[7] Luo, Jiufu[1,2] Zhou, Jinxing[1,2]

第一作者：Wang, Genzhu

通信作者：Zhou, JX[1];Liu, YG[2]

机构：[1]Beijing Forestry Univ, Sch Soil & Water Conservat, Jianshui Res Stn, Beijing 100083, Peoples R China;[2]Beijing Forestry Univ, Key Lab State Forestry Adm Soil & Water Conservat, Beijing 100083, Peoples R China;[3]Chinese Acad Forestry, Inst Desertificat Studies, Beijing 100091, Peoples R China;[4]Chinese Acad Forestry, Res Inst Forestry, Beijing 100091, Peoples R China;[5]Beijing Forestry Univ, Sch Ecol & Nat Conservat, Beijing 100083, Peoples R China;[6]Ctr Land Consolidat & Rehabil Ningxia Hui Autonom, Yinchuan 750002, Ningxia, Peoples R China;[7]Ningxia Univ, Breeding Base State Key Lab Land Degradat & Ecol, Yinchuan 750021, Ningxia, Peoples R China

年份：0

外文期刊名：PLANT AND SOIL

收录：;Scopus(收录号：2-s2.0-85107727981);WOS:【SCI-EXPANDED(收录号:WOS:000659013200001)】；

基金：This study was supported by the National Natural Science Foundation of China (31870707) and the National Key R&D Program of China (2016YFC0502504). We gratefully acknowledge all those who participated in the field investigations and the laboratory tests. We are also grateful to Pinrong Li, Yongxing Chu, and Yong Chai for species identification in the field and the laboratory.

语种：英文

外文关键词：Karst; Secondary succession; Soil bacteria and fungi; Metal elements; Functional traits

摘要：Aims We explored the trends in soil fungal and bacterial patterns and their responses to plant and soil characteristics with increasing site age in abandoned farmland in karst areas. Methods Illumina sequencing of 16S rRNA and ITS genes was used to characterize the soil bacterial and fungal diversities in farmland, farmland abandoned for 3, 6, 20, and 40 years, and old-growth forests in Southwest China. Plant diversity, community-weighted mean (CWM) leaf and branch traits, soil physical and chemical properties and metal element concentrations were also investigated. Results Bacterial diversity decreased slightly with increasing site age, while fungal diversity first increased and then decreased. Ascomycota was the dominant fungal phylum, and its abundance decreased significantly, from 83.21% in farmland to 49.66% in old-growth forests, while that of Basidiomycota increased significantly from 4.52 to 35.43%. The soil bacterial community was dominated by Proteobacteria, Actinobacteria, Acidobacteria, and Chloroflexi. The fungal and bacterial diversities were mainly affected by soil properties. At the older sites, high levels of soil nitrate nitrogen (N), ammonium-N, total N, soil organic carbon, calcium, and magnesium and relatively low levels of soil potassium and available phosphorus (P) resulted in decreased bacterial diversity. Fungal diversity was positively affected by soil total P and pH and negatively affected by soil iron and copper. The bacterial and fungal compositions were jointly affected by soil properties and CWM leaf and branch traits. Conclusions Our findings indicate that soil bacterial and fungal diversities and compositions changed significantly during secondary succession in karst areas. Microbial diversity was determined by soil properties, and compositions were jointly driven by plant and soil properties.