The Changes in Soil Microbial Communities across a Subalpine Forest Successional Series
The Changes in Soil Microbial Communities across a Subalpine Forest Successional Series
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DOI：
10.3390/f13020289
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发表时间：
2022-02
期刊：
影响因子：
2.9
通讯作者：
Zhihui Wang;Yi Bai;Jian Hou;Fei Li;Xuqing Li;R. Cao;Yuyue Deng;Huaibin Wang;Yurui Jiang;Wanqin Yang
中科院分区：
文献类型：
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作者：
Zhihui Wang;Yi Bai;Jian Hou;Fei Li;Xuqing Li;R. Cao;Yuyue Deng;Huaibin Wang;Yurui Jiang;Wanqin Yang
了解森林演替过程中土壤微生物群落的变化对于理解全球变化情景下土壤微生物群落的变化至关重要。因此，在青藏高原东部的王朗国家级自然保护区，中国亚高山森林演替系列土壤微生物群落的组成和多样性进行了调查。计算的土壤细菌多样性指数（Shannon-Wiener为8.598至9.791，Simpson为0.997至0.974，基于丰度的覆盖度估计值（ACE）为4131至4974，物种丰富度指数为3007至3511），土壤真菌的ACE（1323 ~ 921）和物种丰富度（1251 ~ 879）指数从演替初期到演替末期呈下降趋势，而Shannon-Wiener和Simpson指数则随演替的进行变化不大。同时，土壤微生物群落的组成和结构也随森林演替而发生明显变化。优势细菌门（酸杆菌，厚壁菌门和放线菌）和真菌类群（被孢霉门，Rozellomycota和未分配门分支GS 01）的相对丰度变化很大，森林演替。然而，无论演替阶段，变形菌和酸细菌占主导地位的土壤细菌群落和子囊菌和担子菌占主导地位的土壤真菌群落。土壤pH值、土壤有机碳、土壤温度、海拔高度和非木质残体蓄积量对土壤微生物多样性的变化有显著影响。重要的是，土壤pH值是土壤微生物群落随森林演替而变化的主要驱动力。总之，不同演替阶段的森林不仅保存了相同的微生物种群，而且还孕育了整个森林演替系列中独特的微生物多样性;土壤细菌和真菌群落的生物多样性对森林演替有不同的反应。
Knowledge regarding changes in soil microbial communities with forest succession is vital to understand soil microbial community shifts under global change scenarios. The composition and diversity of soil microbial communities across a subalpine forest successional series were therefore investigated in the Wanglang National Nature Reserve on the eastern Qinghai-Tibet Plateau, China. The calculated diversity indices of soil bacteria (8.598 to 9.791 for Shannon-Wiener, 0.997 to 0.974 for Simpson, 4131 to 4974 for abundance-based coverage estimator (ACE) and 3007 to 3511 for Species richness indices), and ACE (1323 to 921) and Species richness (1251 to 879) indices of soil fungi decreased from initial to terminal succession stages, but Shannon-Wiener and Simpson of soil fungi indices varied slightly with forest succession. Meanwhile, the composition and structure of soil microbial communities varied markedly with forest succession. The relative abundance of the dominant bacterial phyla (Acidobacteria, Firmicutes and Actinobacteria) and fungal taxa (Mortierellomycota, Rozellomycota and unassigned phylum clade GS01) varied considerably with forest succession. However, regardless of successional stage, Proteobacteria and Acidobacteria dominated soil bacterial communities and Ascomycota and Basidiomycota dominated soil fungal communities. Moreover, the changes in soil microbial diversity with forest succession were significantly affected by soil pH, soil organic carbon, soil temperature, altitude, and non-woody debris stock. Importantly, soil pH was the dominant driver of soil microbial community shift with forest succession. In conclusion, the forests at different succession stages not only conserve same microbial populations, but also nurse unique microbial diversity across the forest succession series; and the biodiversity of soil bacterial and fungal communities has differential responses to forest succession.