Lipid class composition of annually bleached Caribbean corals
Lipid class composition of annually bleached Caribbean corals
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每年白化的加勒比珊瑚的脂质类成分
DOI：
10.1007/s00227-019-3616-z
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发表时间：
2020
期刊：
影响因子：
2.4
通讯作者：
Muñoz-Garcia, Agustí
中科院分区：
文献类型：
--
作者：
Solomon, Sarah L.;Grottoli, Andréa G.;Warner, Mark E.;Levas, Stephen;Schoepf, Verena;Muñoz-Garcia, Agustí
已知具有高水平总脂质的珊瑚具有增加的漂白恢复潜力，脂质类管理可能进一步阐明为什么一些物种更有弹性，或能够适应每年的漂白压力。在这里，我们测量了三种加勒比海珊瑚（Porites astreoides，Porites divaricata和Orbicella faveolata）的脂质类组成，这些珊瑚于2009年7月在墨西哥莫雷洛斯港（20° 50′ N，86° 52′ W）附近采集，连续两年进行实验性漂白。我们的研究结果表明，单一漂白可以显着改变所有物种的脂质类组成，而重复漂白可以导致稳定的（即，适应的）或甚至更改变的（即，不适应）脂质类组成。具体而言，P.divaricataandO. Faveolataboth在单次漂白后改变了脂质类组成，损失了储存脂质，但在重复漂白胁迫后保持了脂质类组成。然而，单次和重复漂白改变了脂质类组成inP。astreoides，与变化持续6周后反复漂白应激。这项研究提供的证据表明，脂质类管理是与珊瑚弹性相关的变量套件的一部分，P。divaricataandO. faveolata适应他们的脂质类管理，以应对反复漂白胁迫，但P. astreoides没有。珊瑚喜欢P. divaricataandO.因此，faveolatamay可能更适合珊瑚恢复工作，因为在预测本世纪晚些时候出现的慢性重复漂白情况下，珊瑚更有可能持续存在。
Corals with high levels of total lipids are known to have increased resilience potential to bleaching, and lipid class management may shed further light on why some species are more resilient to, or are able to acclimatize to, annual bleaching stress. Here, we measured the lipid class composition of three species of Caribbean corals (Porites astreoides,Porites divaricata, andOrbicella faveolata) collected in July 2009 near Puerto Morelos, Mexico (20° 50′ N, 86° 52′ W) that were experimentally bleached 2 years in a row. Our results show that single bleaching can significantly alter lipid class composition in all species, while repeated bleaching can result in stable (i.e., acclimatized) or even more altered (i.e., not acclimatized) lipid class composition depending on the species. Specifically,P. divaricataandO. faveolataboth had altered lipid class composition with losses in storage lipids following single bleaching, but maintained lipid class composition following repeated bleaching stress. However, both single and repeated bleaching altered the lipid class composition inP. astreoides, with changes persisting for the 6 weeks after repeated bleaching stress. This study provides evidence that lipid class management is part of the suite of variables associated with coral resilience, thatP. divaricataandO. faveolataacclimatize their lipid class management in response to repeated bleaching stress, but thatP. astreoidesdoes not. Corals likeP. divaricataandO. faveolatamay, therefore, be more suitable for coral restoration efforts since they are more likely to persist under chronic repeat bleaching scenarios predicted for later this century.