Factors affecting susceptibility of the coral Montastraea faveolata to black-band disease
Factors affecting susceptibility of the coral Montastraea faveolata to black-band disease
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DOI：
10.3354/meps318103
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发表时间：
2006-01-01
影响因子：
2.5
通讯作者：
Santavy, Deborah L.
中科院分区：
文献类型：
--
作者：
Aeby, Greta S.;Santavy, Deborah L.
黑带病影响了许多热带造礁珊瑚物种，但目前还不清楚是什么因素导致了单个珊瑚对这种疾病的易感性，也不清楚这种疾病是如何在珊瑚群之间传播的。研究表明，不同的压力源增强了黑带病感染珊瑚的能力。本研究考察了水温和机械损伤对该病害侵染浅海珊瑚（Montastraea faveolata）能力的影响，并探讨了两种胁迫因素相互作用的可能性。在实验室条件下，无论温度如何，冠状紫堇都能成功入侵褐毛霉的所有受损片段，而没有入侵未受损片段。我们还确定了当地的食珊瑚蝴蝶鱼是否参与了黑带病的种群间转移。在水族箱中，头形锥虫的存在增加了疾病从感染片段向未感染片段传播的速度。受到保护的珊瑚和暴露于鱼类捕食的珊瑚都感染了这种疾病。因此，可能发生病原体从菌落到菌落的直接口服传播和/或间接粪便传播。珊瑚礁上的潜在压力源和/或疾病媒介等变量可能导致实地观察到的黑带疾病模式。
Black-band disease affects many species of tropical reef-building corals, but it is unclear what factors contribute to the disease-susceptibility of individual corals or how the disease is transmitted between colonies. Studies have suggested that the ability of black-band disease to infect coral is enhanced by different stressors. We examined the effect of both water temperature and mechanical injury on the ability of this disease to infect the reef coral Montastraea faveolata, and investigated the possibility of an interaction between the 2 stressors. Under laboratory conditions, Phormidium corallyticum was able to successfully invade all injured fragments but no uninjured fragments of M. faveolata, irrespective of temperature regime. We also determined whether the local coral-feeding butterflyfish Chaetodon capistratus was involved in the inter-colony transfer of black-band disease. In aquaria, the presence of C. capistratus increased the rate at which the disease spread from infected to non-infected fragments of M faveolata. Both corals that were protected from and those that were exposed to fish predation contracted the disease. Hence, either direct oral transmission of the pathogen from colony to colony and/or indirect fecal transmission could be occurring. Variables such as potential stressors and/or disease vectors on a reef could contribute to the patterns of black-band disease observed in the field.