Species and Phylogenetic Diversity of Woody Plants Shift With the Elevational Gradient in Subtropical Forests in South China

IF 2.3 2区 生物学 Q2 ECOLOGY
Jing Li, Yinghua Luo, Feng Chen, Cong Hu, Chaohao Xu, Zhonghua Zhang, Gang Hu
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Abstract

The distribution of biodiversity along elevational gradients and the drivers of these patterns are research hotspots in community ecology; nonetheless, these aspects remain insufficiently understood. To address this, we established 24 plots along an elevational gradient from 300 to 1400 m on Daming Mountain, Guangxi, China, and examined the patterns and drivers of species and phylogenetic diversity along this gradient via polynomial regression, generalized linear mixed model, correlation analysis, and redundancy analyses. With increasing elevation, species and phylogenetic diversity showed a hump-shaped trend, and the phylogenetic structures exhibited clustering at both low and high elevations, whereas at mid-elevations, a coexistence of clustered and overdispersed structures was observed. Elevation, soil nitrate nitrogen content, and slope collectively constituted the key environmental factors driving the spatial patterns of species diversity. Meanwhile, soil nitrate nitrogen and ammonium nitrogen contents had a decisive influence on phylogenetic diversity. These findings, which reveal the patterns of diversity of woody plant communities along an elevational gradient on Daming Mountain, will contribute to the development of biodiversity conservation strategies for the region.

Abstract Image

华南亚热带森林木本植物种类及系统发育多样性随海拔梯度的变化
生物多样性沿海拔梯度的分布及其驱动因素是群落生态学研究的热点;然而,这些方面仍然没有得到充分的了解。为了解决这一问题,我们在广西大明山海拔300 ~ 1400 m的海拔梯度上建立了24个样地,通过多项式回归、广义线性混合模型、相关分析和冗余分析,研究了这一海拔梯度上物种和系统发育多样性的格局和驱动因素。随着海拔的升高,物种和系统发育多样性呈驼峰状分布,低海拔和高海拔地区的系统发育结构均呈聚集型,而中海拔地区的系统发育结构则呈聚集型和过分散型共存。海拔高度、土壤硝态氮含量和坡度共同构成了影响物种多样性空间格局的关键环境因子。同时,土壤硝态氮和铵态氮含量对系统发育多样性有决定性影响。这些发现揭示了大明山木本植物群落多样性在海拔梯度上的分布规律,为该地区生物多样性保护策略的制定提供了依据。
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来源期刊
CiteScore
4.40
自引率
3.80%
发文量
1027
审稿时长
3-6 weeks
期刊介绍: Ecology and Evolution is the peer reviewed journal for rapid dissemination of research in all areas of ecology, evolution and conservation science. The journal gives priority to quality research reports, theoretical or empirical, that develop our understanding of organisms and their diversity, interactions between them, and the natural environment. Ecology and Evolution gives prompt and equal consideration to papers reporting theoretical, experimental, applied and descriptive work in terrestrial and aquatic environments. The journal will consider submissions across taxa in areas including but not limited to micro and macro ecological and evolutionary processes, characteristics of and interactions between individuals, populations, communities and the environment, physiological responses to environmental change, population genetics and phylogenetics, relatedness and kin selection, life histories, systematics and taxonomy, conservation genetics, extinction, speciation, adaption, behaviour, biodiversity, species abundance, macroecology, population and ecosystem dynamics, and conservation policy.
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