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在全球变暖下基因组信息范围预测揭示了减少的适应多样性,同时缓冲海的范围变化

Xiao-Nie Lin¹, Chao-Yi Ma^1,2, Li-Sha Hu^1,3

¹The Key Laboratory of Mariculture, Ministry of Education, Fisheries College, Ocean University of China, Qingdao, People's Republic of China.

Global change biology

|November 11, 2024

概括

热性能的局部适应是预测物种转移的关键. 这项研究表明,气候变化威胁着Littorina brevicula牛的适应多样性,即使它们的范围持续存在,也可能导致灭绝.

科学领域:

海洋生物学海洋生物学
进化遗传学的进化遗传学
适应气候变化适应气候变化

背景情况:

了解热性能的局部适应对于预测气候变化下的物种分布变化至关重要.
适应不同热环境的海洋物种可能对海洋变暖有独特的反应.
潮间牛Littorina brevicula为研究跨生物地理区域的适应提供了一个模型.

研究的目的:

为了研究中国沿海Littorina brevicula的植物地理模式,热敏度和遗传差异化.
为了确定与热耐受性相关的遗传位置.
预测气候变化对L. brevicula基因子组的分布和适应多样性的影响.

主要方法:

使用新组装的染色体级基因组进行全基因组测序.
遗传地理分析用于识别遗传谱系和子组.
生理物种分布建模 (pSDM) 包含遗传变异和热耐受性.

主要成果:

确定了两个不同的遗传系 (北方和南方),与热环境相关.
血统中的遗传子组显示了与特定的基因组位置相关的上方耐热度的变化.
pSDM预测,在4°C变暖的情景下,南部子群体的息地适宜性有显著下降和潜在的灭绝.

结论:

热应激驱动在多个组织层面上的适应分歧.
气候变化可能会减少物种的适应多样性,即使其整体范围保持.
考虑遗传和生理变异的综合方法对于预测海洋物种对全球变暖的反应至关重要.

关键词:

在GWAS中,GWAS就是GWAS.气候变化气候变化气候变化息地的适宜性息地的适宜性地方适应地方适应生理学特征生理学特征热承受能力热承受能力

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