Greater evolutionary divergence of thermal limits within marine than terrestrial species

Greater evolutionary divergence of thermal limits within marine than terrestrial species
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海洋物种的热极限进化差异比陆地物种更大

DOI:
10.1038/s41558-022-01534-y
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发表时间:
2022
影响因子:
30.7
通讯作者:
Cheng, Brian S.
Cheng, Brian S.
中科院分区:
地球科学1区
文献类型:
--
作者:
Sasaki, Matthew;Barley, Jordanna M.;Gignoux-Wolfsohn, Sarah;Hays, Cynthia G.;Kelly, Morgan W.;Putnam, Alysha B.;Sheth, Seema N.;Villeneuve, Andrew R.;Cheng, Brian S.

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关于哪些生态系统最容易受到气候变暖的影响,存在相当大的不确定性。目前对生物敏感性的理解主要集中在物种水平的评估上,没有考虑种群间的差异。在这里,我们使用荟萃分析,以量化的305人口从61陆地,淡水,海洋和潮间带类群的耐热性变化。我们发现,在海洋和潮间带类群,但不是陆地或淡水类群的种群耐热性强分化。这与增加海洋连通性应减少种内变异的预期背道而驰。海洋中的这种适应性分化表明,在物种水平上可能存在长期的遗传变异,以缓冲气候影响。对气候变暖脆弱性的评估应考虑到人口之间耐热性的差异(或缺乏耐热性),以改善对气候脆弱性的预测。
There is considerable uncertainty regarding which ecosystems are most vulnerable to warming. Current understanding of organismal sensitivity is largely centred on species-level assessments that do not consider variation across populations. Here we used meta-analysis to quantify upper thermal tolerance variation across 305 populations from 61 terrestrial, freshwater, marine and intertidal taxa. We found strong differentiation in heat tolerance across populations in marine and intertidal taxa but not terrestrial or freshwater taxa. This is counter to the expectation that increased connectivity in the ocean should reduce intraspecific variation. Such adaptive differentiation in the ocean suggests there may be standing genetic variation at the species level to buffer climate impacts. Assessments of vulnerability to warming should account for variation in thermal tolerance among populations (or the lack thereof) to improve predictions about climate vulnerability.
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