Contrasting Adult Body-Size in Sister Populations of the Balearic Lizard, Podarcis lilfordi (Günther 1874) Suggests Anthropogenic Selective Pressures

IF 1.1 2区 生物学 Q3 ZOOLOGY Herpetological Monographs Pub Date : 2021-09-09 DOI:10.1655/HERPMONOGRAPHS-D-19-00005
A. Rotger, J. Igual, M. Genovart, V. Rodríguez, C. Ramon, V. Pérez‐Mellado, G. Bibiloni, J. Rita, G. Tavecchia
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引用次数: 3

Abstract

Abstract: Recently isolated populations offer a good biological model to infer the evolutionary forces responsible for the current divergences across populations. We coupled genetic, morphometric, ecological, and demographic analyses from three island populations of the endemic Balearic Wall Lizard, Podarcis lilfordi, (Balearic archipelago, Spain) to infer the mechanisms underlying the observed differences in body size. For each population, we described plant community structure, derived a biotic capacity index, and used individual-based data on 1369 lizards captured and released during 6 yr (2009–2015) to estimate population density and body growth patterns. We used genetic data collected on 80 individuals (∼27 for each population) to infer genetic divergences across islets and population history. Body size divergences cannot be explained by the ecological or population characteristics. Individual growth was slower in the smallest island, where lizards reached the largest average body size. In addition to having the highest density, results suggested that resource availability does not constrain asymptotic body size, but the speed at which individuals reach it does. The Approximate Bayesian Computation used to infer population history from genetic data supported the occurrence of two bottlenecks in the islet with the highest anthropogenic footprint. We emphasize the need to integrate ecological and genetic data and the importance of considering the effects of past human disturbance as an additional force in being able to model present island fauna.
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巴利阿里蜥蜴(Podarcis lilfordi,Günther 1874)姐妹种群成年体型的对比表明了人为的选择压力
摘要:最近分离的种群提供了一个很好的生物学模型来推断导致当前种群差异的进化力。我们对当地巴利阿里墙蜥蜴Podarcis lilfordi(西班牙巴利阿里群岛)的三个岛屿种群进行了遗传学、形态计量学、生态学和人口学分析,以推断观察到的体型差异的潜在机制。对于每个种群,我们描述了植物群落结构,推导了生物能力指数,并使用6年(2009-2015年)捕获和释放的1369只蜥蜴的个体数据来估计种群密度和身体生长模式。我们使用收集到的80个个体(每个种群约27个)的遗传数据来推断胰岛和种群历史之间的遗传差异。体型差异不能用生态或种群特征来解释。在最小的岛屿上,蜥蜴的个体生长速度较慢,那里的蜥蜴平均体型最大。除了具有最高的密度外,研究结果表明,资源的可用性并没有限制渐近体型,而是个体达到它的速度。用于从遗传数据推断种群历史的近似贝叶斯计算支持在人类足迹最高的小岛上出现两个瓶颈。我们强调需要整合生态和遗传数据,并强调将过去人类干扰的影响视为能够模拟当前岛屿动物群的额外力量的重要性。
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来源期刊
Herpetological Monographs
Herpetological Monographs 生物-动物学
CiteScore
5.40
自引率
0.00%
发文量
2
审稿时长
>12 weeks
期刊介绍: Since 1982, Herpetological Monographs has been dedicated to original research about the biology, diversity, systematics and evolution of amphibians and reptiles. Herpetological Monographs is published annually as a supplement to Herpetologica and contains long research papers, manuscripts and special symposia that synthesize the latest scientific discoveries.
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