西非雨林青蛙的比较系统地理学揭示了避难所动态的区域差异。

IF 3.9 1区 生物学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY
Mario Ernst, Daniel M Portik, Gabriel H Segniagbeto, Caleb Ofori-Boateng, Joseph Doumbia, Johannes Penner, N'Goran G Kouamé, Matthew K Fujita, Adam D Leaché, Mozes P K Blom, Mark-Oliver Rödel
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引用次数: 0

摘要

了解过去物种对气候变化的反应可以帮助预测当代气候变化的长期影响。西非上几内亚雨林是全球生物多样性的热点地区,更新世的气候波动驱动了该地区雨林覆盖面积的扩张和收缩。西非滑蛙属(Conraua)是热带雨林专家,为研究气候驱动的景观变化对当代系统地理格局和种群动态的影响提供了绝佳的机会。它们专门栖息在雨林溪流中,几乎没有形态或生态差异。我们生成了分布在上几内亚的四种物种的全基因组限制性内切位点相关DNA (RAD)位点的种群水平数据集。所观察到的系统地理结构与先前假设的宏观和微观避难所一致。在这些结果的基础上,我们使用人口模型来追踪人口趋势,并推断人口连接模式。总体而言,在地形复杂的地区,如Fouta Djallon,种群表现出长期的局部持久性和种群规模的温和变化。相比之下,我们在上几内亚雨林的主要地块上发现了更多的收缩和扩张的动态历史。我们的发现提供了对区域生物多样性模式的见解,并显示了人口对气候波动的反应存在很大差异。这表明当地环境因素在形成种群动态方面发挥了关键作用。在生物多样性研究相对不足的热点地区,例如西非的上几内亚热带雨林,这种见解尤其重要。我们的研究结果对物种、地点和生态系统层面的保护管理和优先排序具有启示意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparative Phylogeography of West African Rainforest Frogs Reveals Regional Variation in Refugia Dynamics.

Understanding how species responded to climatic change in the past can help predict the long-term implications of contemporary climate change. The Upper Guinean rainforests of West Africa are a global biodiversity hotspot, and it is well documented that climatic fluctuations in the Pleistocene drove the expansion and contraction of rainforest cover in this region. West African slippery frogs, genus Conraua, are rainforest specialists and present an excellent opportunity to study the effects of climate-driven landscape changes on contemporary phylogeographic patterns and population dynamics. They exclusively inhabit rainforest streams and show little morphological or ecological disparity. We generated a population-level dataset of genome-wide restriction site-associated DNA (RAD) loci for four species spread across Upper Guinea. The observed phylogeographic structure is consistent with previously postulated macro- and micro-refugia. Building on these results, we used demographic modelling to trace demographic trends over time and infer population connectivity patterns. Overall, populations in topographically complex regions, like the Fouta Djallon, showed signatures of long-term local persistence and milder changes in population size. In contrast, we found more dynamic histories of contraction and expansion in the main Upper Guinean rainforest block. Our findings provide insights into regional biodiversity patterns and show large variation in population responses to climatic fluctuations. This suggests that local environmental factors have played a key role in shaping population dynamics. Such insights are particularly relevant in relatively understudied biodiversity hotspots, such as the Upper Guinean rainforests of West Africa. Our results have implications for conservation management and prioritisation at the species, site, and ecosystem level.

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来源期刊
Molecular Ecology
Molecular Ecology 生物-进化生物学
CiteScore
8.40
自引率
10.20%
发文量
472
审稿时长
1 months
期刊介绍: Molecular Ecology publishes papers that utilize molecular genetic techniques to address consequential questions in ecology, evolution, behaviour and conservation. Studies may employ neutral markers for inference about ecological and evolutionary processes or examine ecologically important genes and their products directly. We discourage papers that are primarily descriptive and are relevant only to the taxon being studied. Papers reporting on molecular marker development, molecular diagnostics, barcoding, or DNA taxonomy, or technical methods should be re-directed to our sister journal, Molecular Ecology Resources. Likewise, papers with a strongly applied focus should be submitted to Evolutionary Applications. Research areas of interest to Molecular Ecology include: * population structure and phylogeography * reproductive strategies * relatedness and kin selection * sex allocation * population genetic theory * analytical methods development * conservation genetics * speciation genetics * microbial biodiversity * evolutionary dynamics of QTLs * ecological interactions * molecular adaptation and environmental genomics * impact of genetically modified organisms
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