There are a wide range of Scleractinian corals that are collected for the global reef aquarium market, often from non-reefal environments. The sustainability of coral harvesting is potentially threatened by increasing anthropogenic disturbances and climate change, though it is unknown to what extent many commonly harvested corals are susceptible to environmental change, or actually bleach during marine heatwaves. In this study, we experimentally tested the temperature sensitivity and bleaching susceptibility of six coral species ( Homophyllia australis , Micromussa lordhowensis , Catalaphyllia jardinei , Trachyphyllia geoffroyi , Duncanopsammia axifuga , and Euphyllia glabrescens ), which are important components of the aquarium coral fisheries across northern Australia, in Western Australia, the Northern Territory, and/or Queensland. Interspecific differences were evident in the temperature sensitivity and bleaching susceptibility among the study species. Homophyllia australis , and M. lordhowensi s were found to be particularly susceptible to elevated temperatures, whereby all corals subjected to elevated temperatures died within the course of the experimental treatment (75 d). Catalaphyllia jardinei and E. glabrescens also exhibited significant increases in mortality when exposed to elevated temperatures, though some of the corals did survive, and C. jardinei mostly died only after exposure to elevated temperatures. The other species ( T. geoffroyi and D. axifuga ) exhibited marked bleaching when exposed to elevated temperatures, but mortality of these corals was similar to that of conspecifics held at ambient temperatures. This study highlights the potential for environmental change to impact the sustainability and viability of Australian coral harvest fisheries. More importantly, this study highlights the need for specific and targeted in situ monitoring for important stocks of coral fishery target species, to assess their vulnerability to fishery and fishery-independent effects.

中文翻译：

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澳大利亚北部收集的水族馆珊瑚的漂白敏感性

为全球珊瑚礁水族馆市场收集了种类繁多的硬骨珊瑚，通常来自非珊瑚礁环境。珊瑚采集的可持续性可能会受到人为干扰和气候变化增加的威胁，尽管目前尚不清楚许多通常采集的珊瑚在多大程度上容易受到环境变化的影响，或者在海洋热浪期间实际上会漂白。在这项研究中，我们通过实验测试了 6 种珊瑚（Homophyllia australis、Micromussa lordhowensis、Catalaphyllia jardinei、Trachyphyllia geoffroyi、Duncanopsammia axifuga 和Euphyllia glabrescens）的温度敏感性和漂白敏感性，它们是澳大利亚北部水族馆珊瑚的重要组成部分，在西澳大利亚州、北领地和/或昆士兰州。研究物种之间的温度敏感性和漂白敏感性存在明显的种间差异。发现 Homophyllia australis 和 M. lordhowensi s 对高温特别敏感，所有受到高温的珊瑚都在实验处理过程中死亡（75 天）。Catalaphyllia jardinei 和 E. glabrescens 在暴露于高温时也表现出显着增加的死亡率，尽管一些珊瑚确实存活了下来，而 C. jardinei 大多只有在暴露于高温后才会死亡。其他物种（T. geoffroyi 和 D. axifuga）在暴露于高温时表现出明显的白化，但这些珊瑚的死亡率与环境温度下的同种珊瑚的死亡率相似。这项研究强调了环境变化可能影响澳大利亚珊瑚捕捞渔业的可持续性和生存能力。更重要的是，这项研究强调了对珊瑚渔业目标物种的重要种群进行具体和有针对性的原位监测的必要性，以评估它们对渔业和渔业独立影响的脆弱性。