The Effects of Biotic and Abiotic Factors on the Community Dynamics in a Mountain Subtropical Forest

编号 010028604

推送时间 20210412

研究领域 森林生态 

年份 2021 

类型 期刊 

语种 英语

标题 The Effects of Biotic and Abiotic Factors on the Community Dynamics in a Mountain Subtropical Forest

来源期刊 forest

期 第286期

发表时间 20210401

关键词 community dynamics;  biodiversity;  functional traits;  community structure;  demographic process;  topographic variables;  soil nutrients; 

摘要 From supporting wood production to mitigating climate change, forest ecosystem services are crucial to the well-being of humans. Understanding the mechanisms that drive forest dynamics can help us infer how to maintain forest ecosystem services and how to improve predictions of forest dynamics under climate change. Despite the growing number of studies exploring above ground biomass (AGB) dynamics, questions of dynamics in biodiversity and in number of individuals still remain unclear. Here, we first explored the patterns of community dynamics in different aspects (i.e., AGB, density and biodiversity) based on short-term (five years) data from a 25-ha permanent plot in a subtropical forest in central China. Second, we examined the relationships between community dynamics and biodiversity and functional traits. Third, we identified the key factors affecting different aspects of community dynamics and quantified their relative contributions. We found that in the short term (five years), net above ground biomass change (ΔAGB) and biodiversity increased, while the number of individuals decreased. Resource-conservation traits enhanced the ΔAGB and reduced the loss in individuals, while the resource-acquisition traits had the opposite effect. Furthermore, the community structure contributed the most to ΔAGB; topographic variables and soil nutrients contributed the most to the number of individuals; demographic process contributed the most to biodiversity. Our results indicate that biotic factors mostly affected the community dynamics of ΔAGB and biodiversity, while the number of individuals was mainly shaped by abiotic factors. Our work highlighted that the factors influencing different aspects of community dynamics vary. Therefore, forest management practices should be formulated according to a specific protective purpose. View Full-Text

服务人员 王璐

服务院士 蒋有绪

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