Genomics‐Informed Range Predictions Under Global Warming Reveal Reduced Adaptive Diversity Whilst Buffering Range Shifts for a Marine Snail

IF 10.8 1区 环境科学与生态学 Q1 BIODIVERSITY CONSERVATION Global Change Biology Pub Date : 2024-11-11 DOI:10.1111/gcb.17571
Xiao‐Nie Lin, Chao‐Yi Ma, Li‐Sha Hu, Ming‐Ling Liao, Lin‐Xuan Ma, Peter R. Teske, Ary Hoffmann, Yun‐Wei Dong
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Abstract

Understanding the genetic basis of local adaptation in thermal performance is useful for predicting species distribution shifts under anthropogenic climate change. Many species are distributed across multiple biogeographic regions, and the uniquely adapted populations in each region may respond to future ocean warming with distinct distribution changes. In the present study, we investigated phylogeographic patterns, thermal sensitivity, and genetic differentiation in the intertidal snail Littorina brevicula along China's coast. Whole‐genome sequencing results based on a newly assembled chromosome‐level genome revealed two genetic lineages, with a north–south divergence that is linked to the thermal environment. Within each lineage, individuals could be further subdivided into genetic subgroups that differ at key genomic loci underpinning differences in upper heat tolerance. Heat stress drives adaptive divergence across multiple levels of organization, from the individual to the biogeographic level. Taking into account genetic diversity associated with variation in heat tolerance, a physiological species distribution model (pSDM) was applied to predict the distributions of the different genetic subgroups in response to climate change. Both northern and southern lineages were predicted to experience declines in habitat suitability under a 4°C future warming scenario, and that a genotypic subset of snails from the southern lineage may even be driven to extinction. These findings illustrate that even when a species' range is maintained, it can nonetheless experience a significant decrease in adaptive diversity as a result of climate change. The integrated approach presented here, which considered both physiological and adaptive genetic variation at the level of individuals within a biogeographical context, provided new insights into how marine species can respond to global warming.
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根据基因组学预测全球变暖对海洋蜗牛影响的范围显示,适应性多样性减少,同时缓冲了范围的变化
了解热性能局部适应的遗传基础有助于预测人为气候变化下的物种分布变化。许多物种分布在多个生物地理区域,每个区域中具有独特适应性的种群可能会对未来海洋变暖做出反应,出现不同的分布变化。在本研究中,我们调查了中国沿海潮间带螺类 Littorina brevicula 的系统地理格局、热敏感性和遗传分化。基于新组装的染色体级基因组的全基因组测序结果显示了两个遗传系,其南北分化与热环境有关。在每一系中,个体可进一步细分为基因亚群,这些亚群在关键基因组位点上存在差异,是上部耐热性差异的基础。从个体到生物地理学层面,热应力驱动着多个组织层面的适应性分化。考虑到与耐热性变异相关的遗传多样性,应用生理物种分布模型(pSDM)预测了不同遗传亚群在应对气候变化时的分布情况。据预测,在未来升温 4°C 的情况下,北方和南方两个品系的栖息地适宜性都将下降,南方品系的一个基因型亚群甚至可能灭绝。这些发现说明,即使一个物种的分布范围得以维持,它的适应多样性也可能因气候变化而显著下降。本文介绍的综合方法考虑了生物地理背景下个体水平上的生理和适应性遗传变异,为海洋物种如何应对全球变暖提供了新的见解。
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来源期刊
Global Change Biology
Global Change Biology 环境科学-环境科学
CiteScore
21.50
自引率
5.20%
发文量
497
审稿时长
3.3 months
期刊介绍: Global Change Biology is an environmental change journal committed to shaping the future and addressing the world's most pressing challenges, including sustainability, climate change, environmental protection, food and water safety, and global health. Dedicated to fostering a profound understanding of the impacts of global change on biological systems and offering innovative solutions, the journal publishes a diverse range of content, including primary research articles, technical advances, research reviews, reports, opinions, perspectives, commentaries, and letters. Starting with the 2024 volume, Global Change Biology will transition to an online-only format, enhancing accessibility and contributing to the evolution of scholarly communication.
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