功能特征和生态位是 14 种热带树种幼苗种间生长-死亡率权衡的相关因素

IF 4.6 1区环境科学与生态学 Q1 ECOLOGY

Functional Ecology Pub Date : 2024-07-22 DOI:10.1111/1365-2435.14624

Caicai Zhang, Rong Gu, Luxiang Lin, Sabrina E. Russo

引用次数: 0

摘要

树种的生长率与死亡率之间的种间权衡被认为是由功能生物学驱动的，并有助于物种生态位的分化。然而，功能性状的变化往往与生长和死亡率的关系不大，而且很少有研究调查性状和生态位（具体包括地上和地下资源）与权衡本身的关系。这些关系对幼苗尤为重要，因为幼苗通常必须在资源限制下生存，才能达到较大的体型。我们研究了中国西南部热带森林中 14 个树种幼苗的种间生长-死亡率权衡的功能基础及其与生态位的关系。我们利用 15 个功能性状和 15 个生态位变量发现了幼苗阶段种间生长-死亡率权衡的证据。没有一个器官水平的性状与生长、死亡率或权衡相关，而生物量分配性状特定茎长（SSL）是唯一有显著相关性（正）的性状。此外，光照定义的生态位与生长、死亡率或权衡没有相关性，但土壤定义的生态位却与生长、死亡率或权衡有相关性。生长速度快/死亡率高的物种与较高的肥力有关，肥力由较低的土壤容重和坡度以及较高的土壤有机质浓度和土壤全氮决定。我们的研究结果表明，在这片亚洲热带森林的幼苗阶段，茎伸长和土壤肥力对生长、死亡率及其权衡非常重要。我们的研究结果与新热带森林的类似研究结果形成了鲜明对比，后者显示了与日照有关的光合作用相关叶片特征的重要性。因此，可能由于生物地理、树冠干扰率、地形和土壤特性的不同，导致不同森林的人口增长率和权衡的功能驱动因素及其对生态位的影响也可能不同。此外，如果从整个植物的角度来考虑生物量分配，功能性状变异对人口统计率和权衡的影响可能会得到更好的揭示。在期刊博客上免费阅读本文的通俗摘要。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Functional traits and ecological niches as correlates of the interspecific growth–mortality trade-off among seedlings of 14 tropical tree species

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Functional traits and ecological niches as correlates of the interspecific growth–mortality trade-off among seedlings of 14 tropical tree species

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来源期刊

Functional Ecology 环境科学-生态学

CiteScore

9.00

自引率

1.90%

发文量

243

审稿时长

4 months

期刊介绍： Functional Ecology publishes high-impact papers that enable a mechanistic understanding of ecological pattern and process from the organismic to the ecosystem scale. Because of the multifaceted nature of this challenge, papers can be based on a wide range of approaches. Thus, manuscripts may vary from physiological, genetics, life-history, and behavioural perspectives for organismal studies to community and biogeochemical studies when the goal is to understand ecosystem and larger scale ecological phenomena. We believe that the diverse nature of our journal is a strength, not a weakness, and we are open-minded about the variety of data, research approaches and types of studies that we publish. Certain key areas will continue to be emphasized: studies that integrate genomics with ecology, studies that examine how key aspects of physiology (e.g., stress) impact the ecology of animals and plants, or vice versa, and how evolution shapes interactions among function and ecological traits. Ecology has increasingly moved towards the realization that organismal traits and activities are vital for understanding community dynamics and ecosystem processes, particularly in response to the rapid global changes occurring in earth’s environment, and Functional Ecology aims to publish such integrative papers.