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首页> 外文期刊>Marine biology >El Nino, echinoid bioerosion and recovery potential of an isolated Galapagos coral reef: a modeling perspective
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El Nino, echinoid bioerosion and recovery potential of an isolated Galapagos coral reef: a modeling perspective

机译：厄尔尼诺现象，孤立的加拉帕戈斯群岛珊瑚礁的类固醇生物侵蚀和恢复潜力：建模角度

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摘要

Wellington Reef is the northern-most and largest known coral reef in the Galapagos Islands. This study explores the recovery potential of the Wellington Reef when subjected to predicted future El Niao Southern Oscillation warming events that may cause varying degrees of coral mortality followed by sea urchin bioerosion. We developed a stochastic model that employs empirical data from the Wellington Reef and nearby sites. The model estimates CaCO3 bioerosion of individual coral colonies by the sea urchin Eucidaris galapagensis, which recently caused coral reef collapse in the central and southern Galapagos Islands. Numerous projections of the CaCO3 production potential of Wellington Reef 50 years into the future were generated using a simulation model by subjecting the Wellington Reef to El Niao Southern Oscillation warming events and a range of urchin density levels, resulting in varying degrees of coral mortality and subsequent bioerosion by E. galapagensis. Moderate increases in sea urchin abundance above current low levels were found to significantly increase the likelihood of Wellington Reef collapse. The large differences in the recovery of the Galapagos coral reefs across a small latitudinal scale where differences in local echinoid abundances exist make this study of the recovery potential of the Wellington Reef important in understanding the contrast between a resilient reef and ones that are susceptible to collapse. This study suggests a delicate tipping point for triggering an echinoderm-elevated bioerosive phase that results in the degradation of a healthy reef ecosystem.
机译：惠灵顿礁是加拉巴哥群岛最北端和最大的珊瑚礁。这项研究探索了惠灵顿礁在遭受预测的未来厄尔尼诺南方涛动变暖事件的恢复潜力，该事件可能导致不同程度的珊瑚死亡，然后发生海胆生物侵蚀。我们开发了一种随机模型，该模型利用了来自惠灵顿礁石和附近地点的经验数据。该模型估计海胆Eucidaris galapagensis对单个珊瑚群落的CaCO3生物侵蚀作用，这最近导致加拉帕戈斯群岛中部和南部岛屿的珊瑚礁崩溃。使用模拟模型，通过对惠灵顿礁进行厄尔尼诺南部涛动变暖事件和一系列海胆密度水平的模拟模型，对惠灵顿礁50年后的碳酸钙生产潜力进行了许多预测，从而导致不同程度的珊瑚死亡和随后的死亡。 E. galapagensis的生物侵蚀。发现海胆丰度比目前的低水平适度增加会显着增加惠灵顿礁倒塌的可能性。加拉帕戈斯群岛珊瑚礁在较小的纬度尺度上的恢复差异很大，那里存在局部类固醇含量的差异，这使得对惠灵顿礁石的恢复潜力进行的研究对于理解弹性礁石和易塌陷礁石之间的对比非常重要。 。这项研究提出了触发棘手层升高的生物侵蚀阶段的微妙转折点，该阶段导致健康珊瑚礁生态系统的退化。

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  • 来源
    《Marine biology》 |2017年第6期|146.1-146.17|共17页
  • 作者

    Glynn Peter J.; Glynn Peter W.; Riegl Bernhard;

  • 作者单位

    Crane Country Day Sch, 1795 San Leandro Lane, Santa Barbara, CA 93108 USA;

    Univ Miami, Rosenstiel Sch Marine & Atmospher Sci, Dept Marine Biol & Ecol, 4600 Rickenbacker Causeway, Miami, FL 33149 USA;

    Nova Southeastern Univ, Dept Marine & Environm Sci, Halmos Coll Nat Sci & Oceanog, 8000 N Ocean Dr, Dania, FL 33004 USA;

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