Larval connectivity across temperature gradients and its potential effect on heat tolerance in coral populations
Larval connectivity across temperature gradients and its potential effect on heat tolerance in coral populations
复制标题
DOI：
10.1111/gcb.13347
复制
发表时间：
2016-11-01
影响因子：
11.6
通讯作者：
Watson, James R.
中科院分区：
文献类型：
--
作者：
Kleypas, Joan A.;Thompson, Diane M.;Watson, James R.
珊瑚礁越来越多地暴露在温度升高的环境中，这可能导致珊瑚白化和珊瑚及相关生物的高死亡率。珊瑚白化的温度阈值取决于珊瑚对当地最高温度制度的驯化和适应。然而，由于幼虫的扩散，珊瑚种群可以从适应非常不同温度制度的珊瑚中接收幼虫。我们将离线粒子跟踪程序与高分辨率物理海洋学模型的输出相结合，以研究不同热状态珊瑚礁之间珊瑚幼虫的连通性是否会改变珊瑚的热应力阈值。我们的研究结果表明，在珊瑚三角中，温度变化很大的珊瑚礁之间可能存在幼虫运输，并且解释这种连通性可能对白化预测很重要。这对保护规划具有重要意义，因为连通性可能使一些珊瑚礁具有遗传的耐热性，其耐热性高于或低于仅根据当地条件预测的耐热性。
Coral reefs are increasingly exposed to elevated temperatures that can cause coral bleaching and high levels of mortality of corals and associated organisms. The temperature threshold for coral bleaching depends on the acclimation and adaptation of corals to the local maximum temperature regime. However, because of larval dispersal, coral populations can receive larvae from corals that are adapted to very different temperature regimes. We combine an offline particle tracking routine with output from a high-resolution physical oceanographic model to investigate whether connectivity of coral larvae between reefs of different thermal regimes could alter the thermal stress threshold of corals. Our results suggest that larval transport between reefs of widely varying temperatures is likely in the Coral Triangle and that accounting for this connectivity may be important in bleaching predictions. This has important implications in conservation planning, because connectivity may allow some reefs to have an inherited heat tolerance that is higher or lower than predicted based on local conditions alone.