Bleached Porites compressa and Montipora capitata corals catabolize δ13C-enriched lipids
Bleached Porites compressa and Montipora capitata corals catabolize δ13C-enriched lipids
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DOI：
10.1007/s00338-011-0756-0
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发表时间：
2011-09-01
期刊：
影响因子：
3.5
通讯作者：
Rodrigues, Lisa J.
中科院分区：
文献类型：
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作者：
Grottoli, Andrea G.;Rodrigues, Lisa J.
珊瑚依靠储存的能量储备（即，脂质、碳水化合物和蛋白质）以在漂白事件中存活。为了更好地了解珊瑚漂白对脂质catenase和/或合成的生理影响，我们测量了实验漂白（处理）和非漂白（对照）的Porites compressa和Montipora capitata珊瑚在漂白后立即和在珊瑚礁上恢复1.5和4个月后的珊瑚总脂质（δ C-13（TL））的δ C-13。处理珊瑚的总δ C-13（TL）值显著低于对照珊瑚，因为在P. compressa和M. Capitata，分别。δ C-13（TL）的减少与总脂质浓度的减少一致，表明珊瑚分解代谢富含δ C-13的脂质。由于储存脂质主要是在漂白过程中耗尽，我们假设，他们是同位素富集相对于其他脂质类。这项工作进一步有助于澄清我们对漂白时珊瑚代谢和生物化学变化的理解，并有助于阐明脂质类如何影响漂白后的恢复和最终珊瑚的生存。
Corals rely on stored energy reserves (i.e., lipids, carbohydrates, and protein) to survive bleaching events. To better understand the physiological implications of coral bleaching on lipid catabolism and/or synthesis, we measured the delta C-13 of coral total lipids (delta C-13(TL)) in experimentally bleached (treatment) and non-bleached (control) Porites compressa and Montipora capitata corals immediately after bleaching and after 1.5 and 4 months of recovery on the reef. Overall delta C-13(TL) values in treatment corals were significantly lower than in control corals because of a 1.9 and 3.4aEuro degrees decrease in delta C-13(TL) immediately after bleaching in P. compressa and M. capitata, respectively. The decrease in delta C-13(TL) coincided with decreases in total lipid concentration, indicating that corals catabolized delta C-13-enriched lipids. Since storage lipids are primarily depleted during bleaching, we hypothesize that they are isotopically enriched relative to other lipid classes. This work further helps clarify our understanding of changes to coral metabolism and biogeochemistry when bleached and helps elucidate how lipid classes may influence recovery from bleaching and ultimately coral survival.