Ocean acidification changes the male fitness landscape.
Ocean acidification changes the male fitness landscape.
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DOI：
10.1038/srep31250
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发表时间：
2016-08-17
影响因子：
4.6
通讯作者：
Lewis C
中科院分区：
文献类型：
--
作者：
Campbell AL;Levitan DR;Hosken DJ;Lewis C
精子竞争在许多具有重要生态意义的海洋生物中极为普遍。海洋酸化（OA）正在推动海洋环境的快速变化，在海洋环境中，自由产卵的精子可以活动，但在精子竞争的背景下，OA对精子性能的影响却知之甚少。在这里，我们研究了OA（+1000 μatm pCO2）对海胆Paracentrotus lividus精子竞争力的影响。在两种海水条件下，精子速度更快的雄性具有更大的竞争性受精成功率。同样，精子活动能力更强的男性具有更强的精子竞争力，但仅在当前pCO2水平下。在OA下，这种关联的强度显著降低，并且在OA下存在雄性精子性能等级变化，使得在当前条件下最好的雄性不一定是OA下最好的。因此，OA可能会改变男性健身景观，提供了一种机制，环境变化改变海洋物种的遗传景观。
Sperm competition is extremely common in many ecologically important marine taxa. Ocean acidification (OA) is driving rapid changes to the marine environments in which freely spawned sperm operate, yet the consequences of OA on sperm performance are poorly understood in the context of sperm competition. Here, we investigated the impacts of OA (+1000 μatm pCO2) on sperm competitiveness for the sea urchin Paracentrotus lividus. Males with faster sperm had greater competitive fertilisation success in both seawater conditions. Similarly, males with more motile sperm had greater sperm competitiveness, but only under current pCO2 levels. Under OA the strength of this association was significantly reduced and there were male sperm performance rank changes under OA, such that the best males in current conditions are not necessarily best under OA. Therefore OA will likely change the male fitness landscape, providing a mechanism by which environmental change alters the genetic landscape of marine species.