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首页> 外文期刊>Journal of Experimental Marine Biology and Ecology >No evidence of fine scale thermal adaptation in green turtles
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No evidence of fine scale thermal adaptation in green turtles

机译：没有尖锐的绿色乌龟热适应的证据

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摘要

Adaptation to increasing temperatures may enable species to mitigate the long-term impacts of climate change. Sea turtles have temperature dependent sex determination (TSD) and variation in the thermal reaction norm, which influences offspring sex ratio, has been suggested as a potential adaptive mechanism to rising global temperatures. Here, we investigate the sex ratio of green turtle Chelonia mydas offspring from nests on beaches with notable differences in their thermal properties, to look for evidence of localised adaptation. We compared pivotal temperatures and hatch success in both the laboratory and in situ using eggs laid on two nesting beaches (dark vs. pale sand) at Ascension Island that represent the extremes of the range of incubation temperatures experienced by this population. We found no effect of beach of origin on pivotal temperatures, hatch success, or hatchling size in the laboratory or the wild. This suggests that turtles from the same rookery are not locally adapted to different thermal conditions experienced during incubation. Under predicted climate change scenarios, this will result in reduced hatch success and an increased proportion of female offspring unless temporal or spatial range shifts occur.
机译：适应增加温度可能使物种能够减轻气候变化的长期影响。海龟具有温度依赖性的性别测定（TSD），并在潜在的自适应机制上升到了全球温度的潜在自适应机制，具有温度依赖性的性别测定（TSD）和热反应规范的变化。在这里，我们调查绿龟Chelonia Mydas的性别比例从海滩上的巢穴中的后代，其热质性质的显着差异，寻找局部适应的证据。我们将枢轴温度和孵化在实验室和原位上的成功使用鸡蛋在上升岛上的两个嵌套海滩（暗与浅沙）上，表示该人群所经历的孵化温度范围的极端。我们发现在实验室或野生的枢轴温度，孵化成功或孵化尺寸上没有起源的影响。这表明来自同一Rookery的乌龟在孵育期间的不同热情不足。在预测的气候变化方案下，除非发生时间或空间范围的偏移，否则这将导致舱口成功和增加的女性后代比例增加。

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  • 来源
    《Journal of Experimental Marine Biology and Ecology》 |2019年第mayajuna期|110-117|共8页
  • 作者

    Tilley Dominic; Ball Samantha; Ellick Jacqui; Godley Brendan J.; Weber Nicola; Weber Sam B.; Broderick Annette C.;

  • 作者单位

    Univ Exeter Coll Life & Environm Sci Ctr Ecol & Conservat Penryn Campus Penryn TR10 9FE England;

    Ascension Isl Turtle Grp South Atlantic Ocean ASCN 1ZZ Ascension Islan Ascension Islan;

    Ascension Isl Turtle Grp South Atlantic Ocean ASCN 1ZZ Ascension Islan Ascension Islan|Ascension Isl Govt Conservat & Fisheries Dept South Atlantic Ocean ASCN 1ZZ Ascension Islan Ascension Islan;

    Univ Exeter Coll Life & Environm Sci Ctr Ecol & Conservat Penryn Campus Penryn TR10 9FE England;

    Univ Exeter Coll Life & Environm Sci Ctr Ecol & Conservat Penryn Campus Penryn TR10 9FE England|Ascension Isl Govt Conservat & Fisheries Dept South Atlantic Ocean ASCN 1ZZ Ascension Islan Ascension Islan;

    Univ Exeter Coll Life & Environm Sci Ctr Ecol & Conservat Penryn Campus Penryn TR10 9FE England|Ascension Isl Govt Conservat & Fisheries Dept South Atlantic Ocean ASCN 1ZZ Ascension Islan Ascension Islan;

    Univ Exeter Coll Life & Environm Sci Ctr Ecol & Conservat Penryn Campus Penryn TR10 9FE England;

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  • 正文语种 eng
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  • 关键词

    Chelonia mydas; Pivotal temperature; Hatching success; Sea turtle; TSD; Climate change;

    机译：Chelonia Mydas;枢轴温度;孵化成功;海龟;TSD;气候变化;

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