Characterization of fatty acid composition in healthy and bleached corals from Okinawa, Japan
Characterization of fatty acid composition in healthy and bleached corals from Okinawa, Japan
复制标题
DOI：
10.1007/s00338-006-0130-9
复制
发表时间：
2006-11-01
期刊：
影响因子：
3.5
通讯作者：
Tsuchiya, Makoto
中科院分区：
文献类型：
--
作者：
Bachok, Zainudin;Mfilinge, Prosper;Tsuchiya, Makoto
在漂白条件下，珊瑚失去了共生的虫黄藻，从而失去了从光合作用产生的碳合成脂肪酸(FA)的能力。这项研究调查了来自日本南部冲绳大渡礁平原的健康珊瑚和漂白珊瑚的脂肪含量和脂肪酸组成。据推测，随着藻类的消失或死亡，FA的组成和丰度将发生变化，并且可能由于漂白而增加珊瑚中的微生物丰度。对3种健康珊瑚(Pavona Frondifera、Acropora Pulchra和Goniastrea aspera)以及部分漂白和完全漂白的Pavona Frondifera群落的脂肪含量和脂肪酸组成进行了测定。FA组成在健康的珊瑚之间没有差异，但在健康的、部分漂白的和完全漂白的P.Frondifera标本之间存在显著差异。与健康和部分漂白的珊瑚相比，完全漂白的珊瑚含有显著较低的脂肪和总FA含量，以及较低的多不饱和脂肪酸相对含量和较高的饱和脂肪酸相对含量。此外，在完全漂白的珊瑚中，单不饱和脂肪酸和奇数分支脂肪酸的相对浓度显著较高，表明细菌在漂白珊瑚中的定殖率增加。
Under bleaching conditions, corals lose their symbiotic zooxanthellae, and thus, the ability to synthesize fatty acids (FAs) from photosynthetically derived carbon. This study investigated the lipid content and FA composition in healthy and bleached corals from the Odo reef flat in Okinawa, southern Japan, following a bleaching event. It was hypothesized that the FA composition and abundance would change as algae are lost or die, and possibly microbial abundance would increase in corals as a consequence of bleaching. The lipid content and FA composition of three healthy coral species (Pavona frondifera, Acropora pulchra, and Goniastrea aspera) and of partially bleached and completely bleached colonies of P. frondifera were examined. The FA composition did not differ among healthy corals, but differed significantly among healthy, partially bleached, and completely bleached specimens of P. frondifera. Completely bleached corals contained significantly lower lipid and total FA content, as well as lower relative amounts of polyunsaturated FAs and higher relative amounts of saturated FAs, than healthy and partially bleached corals. Furthermore, there was a significantly higher relative concentration of monounsaturated FAs and odd-numbered branched FAs in completely bleached corals, indicating an increase in bacterial colonization in the bleached corals.