News Release

耐热珊瑚创造出抗白化抚育场

Peer-Reviewed Publication

Proceedings of the National Academy of Sciences

A Coral Nursery Panel after the 2015 Bleaching Event

image: A coral nursery panel after the 2015 bleaching event. Nursery colonies from warm adapted parents are outlined in red. Colonies from heat sensitive parents are outlined in blue. After 8 months of growing alongside each other, nursery colonies grown from heat resistant parents show 2-3 times less bleaching than colonies grown from heat sensitive parents. Four species are growing here: Porites cylindrica, Pocillopora damicornis, Acropora hyacinthus and Acropora gemmifer (from upper left, clockwise). view more 

Credit: Image courtesy of Megan K. Morikawa.

一项研究审视了天然耐热珊瑚物种在诸如珊瑚恢复举措中使用的抚育场等不同环境中维持耐热性的能力。由于不断上升的海洋温度,全世界的珊瑚礁面临广泛的白化。某些珊瑚物种包括在高温环境下繁盛生长的单独的群落,人们已经提出,用这类群落作为珊瑚恢复举措的可能的种苗。然而,这种耐热可能来源于可调节的生理特性、微生物组相关效应,或者共生体相关效应。为了检验当转移到抚育场之后这些群落是否很可能维持耐热性,Megan K. Morikawa 和 Stephen R. Palumbi 于2014年冬季把4个珊瑚物种的具有不同耐热性的80个群落的800个片段放在了南太平洋美属萨摩亚的Sili礁的抚育场。与源于耐热性较低的亲本珊瑚物种的珊瑚相比,在2015年萨摩亚群岛的全球白化事件之后,来自耐热亲本珊瑚的种苗群落表现出的白化少2到3倍,即便是在一个普通的抚育场驯化8个月之后也是如此。这些群落还维持了相对较高的遗传多样性。此外,这组作者发现了在珊瑚小块��它们是亲本群落的生物复制品��的白化与亲本群落的起源库以及共生体属之间存在一种相关性。这组作者说,选择可以抵御温暖海洋条件的珊瑚群落,可能有助于具有气候恢复力的珊瑚的抚育场的发展。

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