Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, India; Department of Biological Sciences, Florida International University, Miami, FL 33199, United States of America.
Department of Microbiology, School of Life Sciences, Pondicherry University, Puducherry, India.
Mar Pollut Bull. 2019 Aug;145:287-294. doi: 10.1016/j.marpolbul.2019.05.033. Epub 2019 Jun 3.
Information about coral community response to bleaching on Indian reefs is much more limited compared with Indo-Pacific reefs, with no understanding of algal symbionts. We investigated a reef in Palk Bay to understand the coral community response to 2016 bleaching event and to reveal dominant symbiont type association in four common coral genera. Out of 508 colonies surveyed, we found 20.9% (106) mortality in 53.8% (n = 290) of bleached corals. We found differential bleaching and recovery pattern among coral genera. Bleaching was most prevalent in Acropora (86.36%), followed by Porites (65.45%), while moderate to no bleaching was recorded in Favites 5.88%, Symphyllia 51.11% and Favia 55.77%, Platygyra 41.67%, Goniastrea 41.83%. Pre-bleaching and post bleaching samplings revealed changes in dominant symbiont type following bleaching only in Acropora (Cladocopium, Clade C to Durusdinium Clade D) while no such changes were found in other coral genera hosted Clade D. This is the first observation of coral symbiont diversity in the Indian reef.
与印度-太平洋的珊瑚礁相比，有关印度珊瑚礁对白化现象的群落响应的信息要少得多，对共生藻类也缺乏了解。我们调查了 Palk 湾的一个珊瑚礁，以了解珊瑚群落对 2016 年白化事件的响应，并揭示了四个常见珊瑚属中的优势共生体类型关联。在调查的 508 个群体中，我们发现有 20.9%（106 个）的珊瑚死亡，占白化珊瑚的 53.8%（n=290）。我们发现不同珊瑚属的白化和恢复模式存在差异。白化现象在 Acropora（86.36%）中最为普遍，其次是 Porites（65.45%），而在 Favites（5.88%）、Symphyllia（51.11%）和 Favia（55.77%）、Platygyra（41.67%）、Goniastrea（41.83%）中则为中度至无白化。在白化前和白化后采样中，仅在 Acropora（Cladocopium，Clade C 到 Durusdinium Clade D）中发现了共生体优势类型的变化，而在其他珊瑚属中未发现 Clade D 的变化。这是首次在印度珊瑚礁中观察到珊瑚共生体的多样性。
