历史很重要:西南大西洋蠵龟(睾丸目:螯虾科)的进化和人口重建

IF 1.8 3区 环境科学与生态学 Q3 ECOLOGY
Sandra Ludwig, Laís Amorim, Alberty Xavier, Paula Rodrigues Guimarães, Sarah Maria Vargas
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引用次数: 0

摘要

西南大西洋(SWA)是卡鲁塔-卡鲁塔(Caretta caretta)的一个重要区域,该区域的卡鲁塔-卡鲁塔(Caretta caretta)具有独特的遗传谱系;然而,它们的人口演化仍被误解。在这项研究中,我们利用 D-环和微卫星数据评估了西南大西洋四个新栖息地的人口模式,寻找扩张和瓶颈信号。然后,我们利用近似贝叶斯计算方法模拟了西南大西洋的几种殖民情景。支持率最高的方案表明,蠵龟可能是由ES/k3这一古老的品系在西南大西洋地区进行过一次殖民,该品系发出了共享祖先历史的信号,而其他品系则是通过分化和引入过程从该品系起源的,这就解释了其栖息地和遗传集群之间的高混杂水平。D 环恢复了过去种群的稳定性。不过,微卫星仍然发现了近期发生的尖锐瓶颈事件,这可能是末次冰川极盛时期、厄尔尼诺南方涛动和人类活动引发的。因此,我们首次对蠵龟的生活史和在西南大西洋的定居情况进行了完整的评估,展示了不同标记物(母系标记物和双亲标记物)之间的差异,这些差异可能会影响我们对其遗传和人口模式的理解,在全球范围内开展保护计划时应考虑这些差异。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

History matters: evolutionary and demographic reconstruction of the Southwest Atlantic loggerheads (Testudinata: Cheloniidae)

History matters: evolutionary and demographic reconstruction of the Southwest Atlantic loggerheads (Testudinata: Cheloniidae)

The Southwest Atlantic (SWA) is an important region for the Caretta caretta characterized by unique genetic lineages; however, their demographic evolution is still misunderstood. In this study, we evaluated the demographic patterns of four SWA rookeries using D-loop and microsatellites data looking for expansion and bottlenecks signals. Then, we simulated several colonization scenarios for the SWA using Approximate Bayesian Computation. The best-supported scenario indicated that loggerheads might have colonized the SWA region once by the ancient lineage of ES/k3 that signals a sharing ancestry history, and from it originated the other lineages by divergence and introgression processes, explaining the high admixture levels between their rookeries and genetic clusters. The D-loop recovered population stability in the past. Still, microsatellites identified sharp recent bottleneck events, which the Last Glacial Maximum, El Niño Southern Oscillation, and anthropogenic actions may have triggered. Thus, we provide, for the first time, a complete assessment of the life history and colonization of loggerhead into the SWA, demonstrating differences between markers (matrilinear and biparental) that may bias our understanding of their genetic and demographic patterns, and which should be considered for conservation programs at a global scale.

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来源期刊
Evolutionary Ecology
Evolutionary Ecology 环境科学-进化生物学
CiteScore
3.00
自引率
5.30%
发文量
70
审稿时长
3 months
期刊介绍: Evolutionary Ecology is a concept-oriented journal of biological research at the interface of ecology and evolution. We publish papers that therefore integrate both fields of research: research that seeks to explain the ecology of organisms in the context of evolution, or patterns of evolution as explained by ecological processes. The journal publishes original research and discussion concerning the evolutionary ecology of organisms. These may include papers addressing evolutionary aspects of population ecology, organismal interactions and coevolution, behaviour, life histories, communication, morphology, host-parasite interactions and disease ecology, as well as ecological aspects of genetic processes. The objective is to promote the conceptual, theoretical and empirical development of ecology and evolutionary biology; the scope extends to any organism or system. In additional to Original Research articles, we publish Review articles that survey recent developments in the field of evolutionary ecology; Ideas & Perspectives articles which present new points of view and novel hypotheses; and Comments on articles recently published in Evolutionary Ecology or elsewhere. We also welcome New Tests of Existing Ideas - testing well-established hypotheses but with broader data or more methodologically rigorous approaches; - and shorter Natural History Notes, which aim to present new observations of organismal biology in the wild that may provide inspiration for future research. As of 2018, we now also invite Methods papers, to present or review new theoretical, practical or analytical methods used in evolutionary ecology. Students & Early Career Researchers: We particularly encourage, and offer incentives for, submission of Reviews, Ideas & Perspectives, and Methods papers by students and early-career researchers (defined as being within one year of award of a PhD degree) – see Students & Early Career Researchers
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