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首页> 外文期刊>Marine ecology progress series >Response of reef corals and fish at Osprey Reef to a thermal anomaly across a 30 m depth gradient
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Response of reef corals and fish at Osprey Reef to a thermal anomaly across a 30 m depth gradient

机译：礁石珊瑚和鱼在Osprey Reef上的响应在30米深度梯度上的热异常中

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摘要

Coral bleaching causes coral mortality that has knock-on effects on reef ecosystems, including reductions of some fish species. However, the extent of coral bleaching varies considerably among habitats. For example, deeper areas of reefs typically bleach less than areas in the shallows. However, rates of coral mortality at depth and the knock-on effects on other reef species are rarely documented. Here, we quantified the extent of coral bleaching and resulting mortality following a marine heat wave at Osprey Reef in the Coral Sea, Australia, along a depth gradient from 2 to 30 m. We also quantified the response of the associated reef fish assemblages. We found taxon-specific patterns in both bleaching and mortality, with some taxa bleaching less at depth, some bleached most at intermediate depths, and others exibiting no difference among depths. Similarly, bleaching-induced mortality varied among taxa and with depth. However, in the more abundant taxa (e.g. Acropora, Montipora and Porites), mortality was lower at greater depths. Reef fish assemblage structure had not changed 1 yr after bleaching. The relatively high incidence of bleaching at depth compared to other studies is likely due to high light penetration in the clear waters of the Coral Sea, suggesting corals in these habitats have a higher risk of bleaching during thermal anomalies. Nonetheless, corals capable of living in deeper waters appear more likely to have persisted through this severe bleaching event, while the fish assemblage did not change in response to the loss of live coral cover.
机译：珊瑚漂白导致珊瑚死亡率对珊瑚礁生态系统具有敲击作用，包括减少一些鱼类。然而，珊瑚漂白程度在栖息地之间变化很大。例如，珊瑚礁的深层区域通常漂白于浅截止的区域。然而，深度珊瑚死亡率和对其他珊瑚物种的敲击效应很少记录。在这里，我们量化了珊瑚珊瑚礁的海洋热浪在澳大利亚，澳大利亚珊瑚海的海洋热浪后的死亡率，沿着2至30米的深度梯度。我们还量化了相关礁鱼组合的响应。我们发现了漂白和死亡率的分类群特异性模式，有些征征在深度漂白，一些在中间深度上漂白，其他人在深度之间没有差异。同样地，漂白诱导的死亡率在分类群和深度之间变化。然而，在越丰富的分类群中（例如Acropora，Montopora和Porites），在更深入的深度下死亡率降低。漂白后礁鱼组合结构没有改变1年。与其他研究相比，漂白深度相对较高的发病率可能是由于珊瑚海的透明水中的高光渗透，这些栖息地的珊瑚在热异常期间具有更高的漂白风险。尽管如此，能够生活在更深的水域中的珊瑚似乎更有可能通过这种严重的漂白事件持续存在，而鱼类组合并没有因丧失活珊瑚覆盖而变化。

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  • 来源
    《Marine ecology progress series》 |2019年第jul18期|93-102|共10页
  • 作者

    Crosbie Augustine J.; Bridge Tom C. L.; Jones Geoff; Baird Andrew H.;

  • 作者单位

    James Cook Univ Coll Sci & Engn Townsville Qld 4811 Australia|James Cook Univ ARC Ctr Excellence Coral Reef Studies Townsville Qld 4811 Australia;

    James Cook Univ ARC Ctr Excellence Coral Reef Studies Townsville Qld 4811 Australia|Queensland Museum Network Townsville Qld 4810 Australia;

    James Cook Univ Coll Sci & Engn Townsville Qld 4811 Australia|James Cook Univ ARC Ctr Excellence Coral Reef Studies Townsville Qld 4811 Australia;

    James Cook Univ ARC Ctr Excellence Coral Reef Studies Townsville Qld 4811 Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Coral bleaching; Depth gradients; Depth refuge; Disturbance; Recovery;

    机译：珊瑚漂白;深度梯度;深度避难;干扰;恢复;

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