Environmental gradients mediate dispersal evolution during biological invasions

IF 7.6 1区 环境科学与生态学 Q1 ECOLOGY Ecology Letters Pub Date : 2024-07-16 DOI:10.1111/ele.14472
John W. Benning, Eliza I. Clark, Ruth A. Hufbauer, Christopher Weiss-Lehman
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Abstract

Rapid evolution of increased dispersal at the edge of a range expansion can accelerate invasions. However, populations expanding across environmental gradients often face challenging environments that reduce fitness of dispersing individuals. We used an eco-evolutionary model to explore how environmental gradients influence dispersal evolution and, in turn, modulate the speed and predictability of invasion. Environmental gradients opposed evolution of increased dispersal during invasion, even leading to evolution of reduced dispersal along steeper gradients. Counterintuitively, reduced dispersal could allow for faster expansion by minimizing maladaptive gene flow and facilitating adaptation. While dispersal evolution across homogenous landscapes increased both the mean and variance of expansion speed, these increases were greatly dampened by environmental gradients. We illustrate our model's potential application to prediction and management of invasions by parameterizing it with data from a recent invertebrate range expansion. Overall, we find that environmental gradients strongly modulate the effect of dispersal evolution on invasion trajectories.

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环境梯度是生物入侵过程中扩散演化的中介。
在扩散范围扩大的边缘,扩散能力增强的快速进化可加速入侵。然而,跨越环境梯度扩张的种群往往面临着降低扩散个体适应性的挑战性环境。我们利用生态进化模型来探讨环境梯度如何影响扩散进化,进而调节入侵的速度和可预测性。在入侵过程中,环境梯度反对增加扩散的进化,甚至导致沿较陡梯度的扩散减少的进化。与直觉相反的是,减少扩散可以最大限度地减少不适应的基因流动,促进适应,从而加快扩张速度。虽然在同质景观上的扩散演化提高了扩张速度的均值和方差,但环境梯度极大地抑制了这些增长。我们利用最近一次无脊椎动物范围扩张的数据对模型进行了参数设置,从而说明了我们的模型在入侵预测和管理方面的潜在应用。总之,我们发现环境梯度会强烈调节扩散演化对入侵轨迹的影响。
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来源期刊
Ecology Letters
Ecology Letters 环境科学-生态学
CiteScore
17.60
自引率
3.40%
发文量
201
审稿时长
1.8 months
期刊介绍: Ecology Letters serves as a platform for the rapid publication of innovative research in ecology. It considers manuscripts across all taxa, biomes, and geographic regions, prioritizing papers that investigate clearly stated hypotheses. The journal publishes concise papers of high originality and general interest, contributing to new developments in ecology. Purely descriptive papers and those that only confirm or extend previous results are discouraged.
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