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Vegetation restoration in an alpine meadow: Insights from soil microbial communities and resource limitation across soil depth

植被(病理学) 环境科学 微生物种群生物学 底土 恢复生态学 生态系统 土壤水分 生态学 土壤科学 生物 细菌 遗传学 医学 病理
作者
Xiaorong Zhou,Xianke Chen,Kang Yang,Xiaowei Guo,Guohua Liu,Guoqiang Zhuang,Guodong Zheng,Danielle Fortin,Anzhou Ma
出处
期刊:Journal of Environmental Management [Elsevier]
卷期号:360: 121129-121129 被引量:2
标识
DOI:10.1016/j.jenvman.2024.121129
摘要

Aboveground vegetation restoration shapes the soil microbial community structure and affects microbial resource acquisition. However, the changes in soil microbial resource limitation in subsoil during vegetation restoration are still unclear. In this study, the microbial community structure and resource limitation in an alpine meadow soil profile that had undergone natural restoration for short-term (4-year) and long-term (10-year) restoration in response to vegetation restoration were explored through high-throughput sequencing analysis and extracellular enzyme stoichiometry (EES). There was no significant difference in microbial composition and α diversity between short- and long-term restoration soils. Soil microorganisms in this alpine meadow were mainly limited by phosphorus. Carbon limitation of soil microorganisms was significantly decreased in each layer (0-15, 15-30, 30-45, 45-60, and 60-80 cm corresponding to L1, L2, L3, L4, and L5, respectively) of long-term restoration soils when compared to that of the short-term restoration soil layers, while phosphorus limitation of microorganisms in subsoil (60-80 cm) was significantly increased by 17.38%. Soil nutrients, pH, moisture content, and microbial composition are the main drivers of microbial resource limitation in restoration, and their effects on microbial resource limitation were different in short- and long-term restoration. Meanwhile, key microbial taxa have a significant impact on microbial resource limitation, especially in short-term restoration soils. This study suggested that vegetation restoration significantly affected soil microbial resource limitation, and could alleviate microbial resource limitations by adding nutrients, thus accelerating the process of vegetation restoration in alpine ecosystems.
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