Effect of natural zooplankton feeding on the tissue and skeletal growth of the scleractinian coral Stylophora pistillata
Effect of natural zooplankton feeding on the tissue and skeletal growth of the scleractinian coral Stylophora pistillata
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DOI：
10.1007/s00338-003-0312-7
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发表时间：
2003-10-01
期刊：
影响因子：
3.5
通讯作者：
Sebens, KP
中科院分区：
文献类型：
--
作者：
Ferrier-Pagès, C;Witting, J;Sebens, KP
实验室实验旨在估计不同猎物浓度和摄食方式下石珊瑚 Stylophora pistillata 的摄食率，并评估摄食对组织和骨骼生长的影响。使用新鲜收集的浮游动物，在两种光（80 和 300 mumol 光子 m(-2) s(-1)）和三种喂食水平（无、喂食两次和每周喂食六次）下孵化六组珊瑚。结果表明，摄入的猎物数量与猎物密度成正比，摄食能力并未达到饱和。捕获率在 0.5 到 8 个猎物 200 polyp(-1) h(-1) 之间变化。饥饿几天的珊瑚摄入的浮游生物比喂食的珊瑚还要多。与饥饿的菌落相比，进食的菌落每单位表面积的蛋白质、叶绿素 a 和叶绿素 c(2) 水平显着更高。进食对组织生长有很强的影响，使其增加两到八倍。喂食的珊瑚的钙化率也比饥饿的珊瑚高 30%。即使是中等水平的喂养也会增强组织和骨骼的生长，尽管这种增强所涉及的过程仍有待确定。
Laboratory experiments were designed to estimate the ingestion rates of the scleractinian coral Stylophora pistillata under varying prey concentrations and feeding regimes and to assess the effect of feeding on the tissue and skeletal growth. Six sets of corals were incubated under two light (80 and 300 mumol photons m(-2) s(-1)) and three feeding levels (none, fed twice, and fed six times per week) using freshly collected zooplankton. Results showed that the number of prey ingested was proportional to prey density, and no saturation of feeding capability was reached. Capture rates varied between 0.5 and 8 prey items 200 polyp(-1) h(-1). Corals starved for several days ingested more plankton than did fed corals. Fed colonies exhibited significantly higher levels of protein, chlorophyll a, and chlorophyll c(2) per unit surface area than starved colonies. Feeding had a strong effect on tissue growth, increasing it by two to eight times. Calcification rates were also 30% higher in fed than in starved corals. Even moderate levels of feeding enhanced both tissue and skeletal growth, although the processes involved in this enhancement remain to be determined.