Recruitment Drives Spatial Variation in Recovery Rates of Resilient Coral Reefs.
Recruitment Drives Spatial Variation in Recovery Rates of Resilient Coral Reefs.
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DOI：
10.1038/s41598-018-25414-8
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发表时间：
2018-05-09
影响因子：
4.6
通讯作者：
Briggs CJ
中科院分区：
文献类型：
--
作者：
Holbrook SJ;Adam TC;Edmunds PJ;Schmitt RJ;Carpenter RC;Brooks AJ;Lenihan HS;Briggs CJ
热带珊瑚礁经常受到严重干扰，导致珊瑚礁大规模丧失。由于气候变化和人为干扰对珊瑚礁的威胁越来越大，了解推动这些生态系统恢复的机制至关重要。我们在法属波利尼西亚的莫雷阿前礁上探讨了这个问题，此前棘冠海星爆发和飓风极大地减少了珊瑚的覆盖。在扰动发生后的五年期间，三角形岛屿周围珊瑚复盖率的恢复有系统地不同;在扰动发生后活珊瑚数量最少的地点，珊瑚复盖恢复得最快。虽然各地点的珊瑚回归率差别很大，但就珊瑚分类群和其他底栖空间持有者的相对丰度而言，所有地点都至少显示出一些重新组装到干扰前群落结构的证据。恢复的空间变化的主要驱动力是招聘性产生的珊瑚，随后的增长和生存在塑造的空间格局不太重要。我们的研究结果表明，虽然珊瑚群落一直有弹性，一些地区不太可能达到珊瑚覆盖和分类结构，他们在最近的干扰之前，另一个大规模的扰动的到来。
Tropical reefs often undergo acute disturbances that result in landscape-scale loss of coral. Due to increasing threats to coral reefs from climate change and anthropogenic perturbations, it is critical to understand mechanisms that drive recovery of these ecosystems. We explored this issue on the fore reef of Moorea, French Polynesia, following a crown-of-thorns seastar outbreak and cyclone that dramatically reduced cover of coral. During the five-years following the disturbances, the rate of re-establishment of coral cover differed systematically around the triangular-shaped island; coral cover returned most rapidly at sites where the least amount of live coral remained after the disturbances. Although sites differed greatly in the rate of return of coral, all showed at least some evidence of re-assembly to their pre-disturbance community structure in terms of relative abundance of coral taxa and other benthic space holders. The primary driver of spatial variation in recovery was recruitment of sexually-produced corals; subsequent growth and survivorship were less important in shaping the spatial pattern. Our findings suggest that, although the coral community has been resilient, some areas are unlikely to attain the coral cover and taxonomic structure they had prior to the most recent disturbances before the advent of another landscape-scale perturbation.
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