Large predatory coral trout species unlikely to meet increasing energetic demands in a warming ocean.
Large predatory coral trout species unlikely to meet increasing energetic demands in a warming ocean.
复制标题
DOI：
10.1038/srep13830
复制
发表时间：
2015-09-08
影响因子：
4.6
通讯作者：
Hoey AS
中科院分区：
文献类型：
--
作者：
Johansen JL;Pratchett MS;Messmer V;Coker DJ;Tobin AJ;Hoey AS
气候变化导致的海洋温度升高正在提高海洋变温动物的代谢需求和能量需求。如果海洋系统和渔业的生产力要持续下去，单个物种必须通过增加能量获取或减少能量消耗来补偿这种需求。在这里，我们揭示了印度-西太平洋最重要的珊瑚礁渔业物种，大型掠食性珊瑚鳟鱼Plectropomus leopardus（Serranidae），可以通过行为调整食物摄入量以在高温下维持身体状况，并随着时间的推移适应吃更多的食物。然而，这些增加的能量需求不太可能通过较低营养级的充足生产来满足，因为较小的猎物物种往往首先因气候引起的活珊瑚损失和结构复杂性而减少。因此，气候变化导致的能源消耗普遍增加将加剧对日益减少的猎物生物量的自上而下的竞争，可能会扭曲整个食物网和相关渔业。
Increased ocean temperature due to climate change is raising metabolic demands and energy requirements of marine ectotherms. If productivity of marine systems and fisheries are to persist, individual species must compensate for this demand through increasing energy acquisition or decreasing energy expenditure. Here we reveal that the most important coral reef fishery species in the Indo-west Pacific, the large predatory coral trout Plectropomus leopardus (Serranidae), can behaviourally adjust food intake to maintain body-condition under elevated temperatures, and acclimate over time to consume larger meals. However, these increased energetic demands are unlikely to be met by adequate production at lower trophic levels, as smaller prey species are often the first to decline in response to climate-induced loss of live coral and structural complexity. Consequently, ubiquitous increases in energy consumption due to climate change will increase top-down competition for a dwindling biomass of prey, potentially distorting entire food webs and associated fisheries.