Changes in soil bacterial communities and functional groups beneath coarse woody debris across a subalpine forest successional series

作者：Zhihui Wang, Mingzhen Xu, Fei Li, Yi Bai, Jianfeng Hou, Xuqing Li, Rui Cao, Yuyue Deng, Yurui Jiang, Huaibin Wang, Wanqin Yang · 发表于：Global Ecology and Conservation · 年份：2023 · DOI：10.1016/j.gecco.2023.e02436 · 被引用次数：20 · 研究领域：Forest Ecology and Biodiversity Studies、Environmental DNA in Biodiversity Studies、Mycorrhizal Fungi and Plant Interactions

Although the role of coarse woody debris (CWD) in nurturing biodiversity has been well documented, there is little understanding of how CWD with varying diameters across the forest succession series affect the composition and diversity of the soil bacterial community. Therefore, this study investigated the soil bacterial community composition and biodiversity beneath debris with varying decay classes and diameters in six different successional forests, which constituted a subalpine forest series in the Wanglang National Nature Reserve in the eastern Qinghai–Tibet Plateau, China. The composition and functional groups of the soil bacterial communities in this study varied greatly with forest succession, decay classes and debris diameters. The alpha diversity of these communities decreased gradually along the succession gradients, whereas slight differences were observed among decay class and diameters. The soil bacterial communities beneath CWD were dominated by Proteobacteria and Acidobacteria under all soil conditions, and their relative abundance only varied greatly with the forest succession. The soil bacterial community structure varied significantly among different forest succession and diameters, but not decay classes. The functional groups were dominated by Chemoheterotrophy and aerobic chemoheterotrophy under all soil conditions. Nitrogen-fixing bacterial taxa and functional groups were enriched in the highly decayed classes. The soil nitrogen concentration and C:N rat...