Dispersal restriction and facilitation in species with differing tolerance to development: A landscape genetics study of native and introduced lizards

IF 4.6 2区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Diversity and Distributions Pub Date : 2024-05-16 DOI:10.1111/ddi.13858
Payton M. Phillips, Kelley E. Langhans, Matthew R. Helmus, Wendy A. M. Jesse, Yann Surget-Groba, Jocelyn E. Behm
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Abstract

Aim

The development of natural habitats into urban land uses has greatly accelerated in the recent past due to human activities. This habitat development disrupts species' natural dispersal processes and can lead to both direct and indirect impacts on dispersal. Whether human activities result in restricted or facilitated dispersal may depend on a species' development tolerance; however, this premise has not been tested. We examined the impact of urbanization and road networks on the dispersal of three lizard species in the context of their development tolerance.

Location

Curaçao.

Methods

To quantify species' development tolerance, we modelled three lizard species abundances at sites based on surrounding landscape development. Using microsatellite genotypes, we conducted individual-based resistance surface analyses and modelled the effect of habitat development on genetic admixture to assess indirect dispersal restriction and facilitation. We explored direct facilitation of dispersal using network analysis of mitochondrial haplotypes.

Results

Phyllodactylus martini, a native gecko species, was the least tolerant of development and experienced indirect dispersal restriction due to roads, according to resistance surface analyses. Anolis lineatus, a native anole species, exhibited a neutral relationship with development. Resistance surfaces and Structure analyses showed that A. lineatus faced indirect dispersal restrictions from roads and developed areas, while mitochondrial haplotype networks suggested they benefited from occasional human-facilitated long-distance dispersal events. Hemidactylus mabouia, an introduced gecko species, was the most tolerant of development, and experienced no dispersal restriction, but mitochondrial haplotypes suggest direct long-distance dispersal facilitation.

Main Conclusions

Our findings highlight development tolerance as a key predictor of dispersal impact for these species and future work should test whether these patterns are upheld in other systems. Understanding how human activities affect species' dispersal will aid in managing introduced species while promoting connectivity for native species navigating dispersal challenges in dynamic landscapes.

Abstract Image

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对发展具有不同耐受力的物种的传播限制和促进作用:对本地和引进蜥蜴的景观遗传学研究
近年来,由于人类活动,自然栖息地向城市用地的发展速度大大加快。这种栖息地的开发破坏了物种的自然扩散过程,会对扩散造成直接和间接的影响。人类活动究竟会限制还是促进物种的扩散,可能取决于物种对发展的耐受性,但这一前提尚未得到验证。为了量化物种的发展耐受性,我们根据周围景观的发展情况,模拟了三个蜥蜴物种在不同地点的丰度。利用微卫星基因型,我们进行了基于个体的阻力面分析,并模拟了栖息地发展对遗传混杂的影响,以评估间接扩散限制和促进作用。根据阻力面分析,本地壁虎物种Phyllodactylus martini对开发的耐受性最差,并且由于道路而受到间接扩散限制。Anolis lineatus是一种本地的踝鼹物种,它与发展的关系呈中性。阻力面和结构分析表明,A. lineatus面临着来自道路和发达地区的间接扩散限制,而线粒体单倍型网络则表明它们受益于偶尔发生的人类促成的长距离扩散事件。我们的研究结果突出表明,发展耐受性是预测这些物种扩散影响的一个关键因素,未来的工作应检验这些模式是否在其他系统中得到维持。了解人类活动如何影响物种的扩散将有助于管理引进物种,同时促进本土物种在动态景观中应对扩散挑战时的连通性。
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来源期刊
Diversity and Distributions
Diversity and Distributions 环境科学-生态学
CiteScore
8.90
自引率
4.30%
发文量
195
审稿时长
8-16 weeks
期刊介绍: Diversity and Distributions is a journal of conservation biogeography. We publish papers that deal with the application of biogeographical principles, theories, and analyses (being those concerned with the distributional dynamics of taxa and assemblages) to problems concerning the conservation of biodiversity. We no longer consider papers the sole aim of which is to describe or analyze patterns of biodiversity or to elucidate processes that generate biodiversity.
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