Integrated effects of neighbourhood composition and resource levels on growth of a dominant tree species in a tropical forest.

IF 3.8 1区 生物学 Q1 BIOLOGY
Xiaona Shao, Luxiang Lin, Zhiliang Yao, Madhuparna Chatterjee, Xuejun Ge, Lu Jin, Yun Deng, Xiaodong Yang, Shangwen Xia, Feng Liu, Guanghong Cao, Nathan G Swenson
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引用次数: 0

Abstract

Abiotic environments and biotic neighbourhoods interact to influence plant growth and community assembly. However, the nature of this interaction depends very much on how biotic neighbourhoods are measured, including their relatedness to focal plants. In a tropical seasonal rainforest, we examine the growth of a dominant canopy species in response to environmental factors, the densities and relatedness of conspecific and heterospecific neighbours, and their interactions. We find significant environmental effects and conspecific negative density dependence on growth. Furthermore, conspecific neighbour density has stronger negative effects on growth under high light and soil water resource levels, but weaker negative effects under low light and soil water resource levels. In addition, more closely related heterospecifics in the neighbourhood have negative effects on growth under high soil phosphorus availability, but positive effects under low soil phosphorus availability. In contrast, more closely related conspecifics in the neighbourhood have negative effects on growth under low soil potassium availability, but positive effects under high soil potassium availability. Our study emphasizes the importance of both intra- and interspecific neighbourhood composition and their interactions with resource levels for understanding tree growth. This enhances our understanding of the complex processes in community assembly and species coexistence within forest communities.

邻域组成和资源水平对热带森林优势树种生长的综合影响
非生物环境和生物群落相互作用,影响植物生长和群落聚集。然而,这种相互作用的性质在很大程度上取决于如何测量生物群落,包括它们与焦点植物的关系。在热带季节性雨林中,我们研究了一种优势冠层物种的生长对环境因子的响应,同种和异种邻居的密度和相关性,以及它们之间的相互作用。我们发现显著的环境影响和同比负密度依赖于生长。高光照和低土壤水资源条件下,同密度对植物生长的负面影响较强,低光照和低土壤水资源条件下对植物生长的负面影响较弱。此外,在高磷有效度条件下,与土壤磷有效度关系更密切的邻域异性状对植物生长有负面影响,而在低磷有效度条件下则有积极影响。与此相反,在低钾有效度条件下,邻近同种植物的生长受到负面影响,而在高钾有效度条件下则受到正面影响。我们的研究强调了种内和种间邻居组成及其与资源水平的相互作用对理解树木生长的重要性。这增强了我们对森林群落内群落组装和物种共存的复杂过程的理解。
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来源期刊
CiteScore
7.90
自引率
4.30%
发文量
502
审稿时长
1 months
期刊介绍: Proceedings B is the Royal Society’s flagship biological research journal, accepting original articles and reviews of outstanding scientific importance and broad general interest. The main criteria for acceptance are that a study is novel, and has general significance to biologists. Articles published cover a wide range of areas within the biological sciences, many have relevance to organisms and the environments in which they live. The scope includes, but is not limited to, ecology, evolution, behavior, health and disease epidemiology, neuroscience and cognition, behavioral genetics, development, biomechanics, paleontology, comparative biology, molecular ecology and evolution, and global change biology.
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