Climate warming and dispersal strategies determine species persistence in a metacommunity

IF 1.2 4区环境科学与生态学 Q4 ECOLOGY

Theoretical Ecology Pub Date : 2022-02-04 DOI:10.1007/s12080-022-00531-3

Arzoo Narang, Partha Sharathi Dutta

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引用次数: 0

Abstract

Dispersal is crucial in governing species response toward climate warming. Previous studies suggest that intermediate and density-dependent dispersal enables the functioning of a metacommunity, stabilizing populations at local and regional scales. Here, we consider a spatial ecological model with temperature-dependent traits to elucidate dispersal effects in stabilizing population dynamics under climate warming. Specifically, we analyze the effect of species temperature-dependent life-history traits on a metacommunity dynamics with diverse dispersal strategies (i.e., constant and density-dependent dispersal), tracked along with different dispersal rates of species (relative dispersal). At low and intermediate temperatures, different dispersal strategies synchronize or desynchronize the population dynamics depending upon dispersal rates. However, high temperatures completely synchronize the population trailing constant dispersal, weakening the stabilizing dynamics. Furthermore, density-dependent dispersal strongly affects the stability of metacommunity at high temperatures by increasing or decreasing spatial synchrony depending on dispersal rates. In metacommunities with many patches, conditional upon temperature, species abundance exhibits coexistence of synchronous and asynchronous oscillations, namely the chimera state. Overall, our results show that rising temperature may destabilize the dynamics by synchronizing populations; however, some dispersal mechanisms might impede the adverse outcomes.

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气候变暖和扩散策略决定了物种在元群落中的持久性

在控制物种对气候变暖的反应中，扩散是至关重要的。先前的研究表明，中间和密度依赖的分散使元群落的功能得以实现，在局部和区域尺度上稳定种群。在此，我们考虑一个具有温度依赖特征的空间生态模型来阐明在气候变暖条件下稳定种群动态的扩散效应。具体来说，我们分析了物种温度依赖生活史特征对具有不同扩散策略(即恒定和密度依赖扩散)的元群落动态的影响，并跟踪了不同物种的扩散速率(相对扩散)。在低温和中温条件下，不同的扩散策略使种群动态同步或不同步，这取决于扩散速率。然而，高温完全同步了种群的持续扩散，削弱了稳定的动力。此外，密度依赖性扩散通过随扩散速率增加或减少空间同步性，强烈影响高温环境下元群落的稳定性。在具有多斑块的元群落中，物种丰度表现出同步和异步振荡共存，即嵌合体状态。总体而言，我们的研究结果表明，温度升高可能通过同步种群来破坏动态;然而，某些扩散机制可能会阻碍不良后果的发生。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Theoretical Ecology 环境科学-生态学

CiteScore

3.30

自引率

6.20%

发文量

审稿时长

>12 weeks

期刊介绍： Theoretical Ecology publishes innovative research in theoretical ecology, broadly defined. Papers should use theoretical approaches to answer questions of ecological interest and appeal to and be readable by a broad audience of ecologists. Work that uses mathematical, statistical, computational, or conceptual approaches is all welcomed, provided that the goal is to increase ecological understanding. Papers that only use existing approaches to analyze data, or are only mathematical analyses that do not further ecological understanding, are not appropriate. Work that bridges disciplinary boundaries, such as the intersection between quantitative social sciences and ecology, or physical influences on ecological processes, will also be particularly welcome. All areas of theoretical ecology, including ecophysiology, population ecology, behavioral ecology, evolutionary ecology, ecosystem ecology, community ecology, and ecosystem and landscape ecology are all appropriate. Theoretical papers that focus on applied ecological questions are also of particular interest.