Contrasting effects of ocean acidification on reproduction in reef fishes
Contrasting effects of ocean acidification on reproduction in reef fishes
复制标题
海洋酸化对珊瑚礁鱼类繁殖的对比影响
作者：
M. Welch;P. Munday
海洋物种对海洋酸化敏感性的差异将影响未来海洋群落的结构。繁殖对个体和种群的成功至关重要，但它消耗大量能量，并可能受到海洋中二氧化碳含量上升的不利影响。研究了未来CO2浓度对两种珊瑚礁雀鲷（Amphiprion percula和Acanthochromis polyacanthus）生殖产量的影响。在包括夏季繁殖期在内的9个月的时间里，将成虫繁殖对维持在白天对照（446 μatm）、中等（652 μatm）和高CO2 （912 μatm）环境中。到2100年，在中等（RCP6）和高（RCP8）排放情景下，CO2处理的升高与预测的CO2水平一致。在两种二氧化碳浓度升高的处理下，圆叶蝉的繁殖产量增加了45 - 75%，每窝卵数增加了47 - 56%。相比之下，在高CO2环境下，聚棘豆的繁殖产量下降，与对照组相比，其产卵数量约为三分之一。卵存活率不受CO2的影响，但在CO2升高的情况下，聚棘棘豆卵存活率更高。高CO2处理下，聚棘粉虱的孵化成功率也较高，但CO2处理对子代大小没有影响。尽管在繁殖产量方面存在差异，但两种物种成虫的身体状况在对照和CO2处理之间没有差异。我们的研究结果表明，高二氧化碳对鱼类繁殖的影响是不同的，甚至在同一科的物种之间也是如此。为了预测酸化对未来海洋生物种群的影响，需要对海洋酸化对生殖性能影响的变化有更深入的了解。
Differences in the sensitivity of marine species to ocean acidification will influence the structure of marine communities in the future. Reproduction is critical for individual and population success, yet is energetically expensive and could be adversely affected by rising CO2 levels in the ocean. We investigated the effects of projected future CO2 levels on reproductive output of two species of coral reef damselfish, Amphiprion percula and Acanthochromis polyacanthus. Adult breeding pairs were maintained at current-day control (446 μatm), moderate (652 μatm) or high CO2 (912 μatm) for a 9-month period that included the summer breeding season. The elevated CO2 treatments were consistent with CO2 levels projected by 2100 under moderate (RCP6) and high (RCP8) emission scenarios. Reproductive output increased in A. percula, with 45–75 % more egg clutches produced and a 47–56 % increase in the number of eggs per clutch in the two elevated CO2 treatments. In contrast, reproductive output decreased at high CO2 in Ac. polyacanthus, with approximately one-third as many clutches produced compared with controls. Egg survival was not affected by CO2 for A. percula, but was greater in elevated CO2 for Ac. polyacanthus. Hatching success was also greater for Ac. polyacanthus at elevated CO2, but there was no effect of CO2 treatments on offspring size. Despite the variation in reproductive output, body condition of adults did not differ between control and CO2 treatments in either species. Our results demonstrate different effects of high CO2 on fish reproduction, even among species within the same family. A greater understanding of the variation in effects of ocean acidification on reproductive performance is required to predict the consequences for future populations of marine organisms.
DOI：
10.1016/j.cbpa.2013.07.025
发表时间：
2013-11
影响因子：
2.3
作者：
Couturier, Christine S.;Stecyk, Jonathan A. W.;Rummer, Jodie L.;Munday, Philip L.;Nilsson, Goran E.
通讯作者：
Nilsson, Goran E.