文献类型：期刊文献

英文题名：Land Formation in Coast Governing the Soil Bacterial Community Succession Via Regulating Soil Conditions and Local Species Pool: An Example Study in Hengsha Island, Yangtze River Estuary

作者：Sha, Chenyan[1]; Su, Jinghua[1]; Lin, Kuangfei[2]; Zhen, Jiaoji[1]; Wang, Qing[1]; Zhang, Jing[3]; Shen, Cheng[1,2]; Wang, Min[1]

机构：[1] Shanghai Academy of Environmental Sciences, Shanghai, 200233, China; [2] State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai, 200237, China; [3] School of Environmental and Geographical Sciences, Shanghai Normal University, Shanghai, 200234, China

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240121512)

语种：英文

外文关键词：Bacteria - Biodiversity - Ecosystems - Forestry - Lakes - Land use - Landforms - Soil temperature

摘要：A B S T R A C TTidal flat land forming is the main land use method in coastal areas. Soil bacterial community plays a major role in soil ecological function and ecosystem services. Specific soil chronosequences formed by different land forming times are ideal objects for studying how human land use and natural processes affect the dynamics of bacterial communities. A good understanding of the driving factors and succession mechanisms for bacterial communities is also necessary for future land forming activities. Here, we investigated soil bacterial community structure along with the land forming process (from 1 to 14 years) on Hengsha Island, Yangtze River Estuary. Significant temporal variations in soil bacterial communities during the land formation were found, expressing by significantly lower diversity but higher Actinobacteriota at the beginning stage. In addition, the diversity of soil bacterial communities was relatively stable after 3 years land formation and the abundance of Nitrospirota increased gradually with the extension of time. Obvious temporal succession of soil bacterial communities were also uncovered by beta-diversity analyses with species turnover as the main contributor. Venn analysis showed that the local species pool of soil bacterial changed greatly at different land ages, which was identified as the major mechanism for community variations during the land formation. Random forest analysis showed significant correlations between the soil physicochemical factors and bacterial communtiies, with the soil pH and conductivity as key driving factors. Finally, the results of structure equation model revealed that soil landforming time significantly affected soil temperature and pH, which directly changed the soil bacterial compositions and indirectly regulated them by changing bacterial phylogenetic diversity. These findings would provide a theoretical foundation for sustainable land-use practices that preserve biodiversity and maintain the ecological health of coastal ecosystems. ? 2024, The Authors. All rights reserved.