Interspecific differences in the post-settlement survival of Acropora corals under a common garden experiment
Interspecific differences in the post-settlement survival of Acropora corals under a common garden experiment
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常见花园实验下鹿角珊瑚定居后生存的种间差异
DOI：
10.1007/s12562-018-1230-5
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发表时间：
2018
影响因子：
1.9
通讯作者：
Fudo Masayuki
中科院分区：
文献类型：
--
作者：
Suzuki Go;Okada Wataru;Yasutake Youko;Kai Sayaka;Fujikura Yuji;Tanita Iwao;Yamashita Hiroshi;Hayashibara Takeshi;Ando Wataru;Nogami Koichi;Fudo Masayuki
极低的定居后存活率是人工修复顶孔珊瑚的最大障碍之一。然而，可能是由于珊瑚幼鱼的野外观察困难，有关定居后生存的种间差异的数据很少。在这里，我们分析了顶孔珊瑚三个优势种（A. digitifera、尖叶甲A. tenuis、细叶拟步行虫A. yongei），具有不同的群体形态和栖息地偏好，定居后2年在相同的环境条件下。定居后的生存率明显高于A。A. digitifera结算后3个月。两年后，A. tenuis比A高约15倍。指状体在一个单独的分析三个瓶刷物种（A。awi，A. echinata、刺孢A. subglabra）和A. tenuis，定居后生存总是较高forA.对其他两种瓶刷的存活率高于其他两种瓶刷，表明在形态学上姐妹种之间的初始存活率不同。低存活率可能与前7个月的缓慢生长速率相关。因此，物种选择对于成功的人工珊瑚恢复是重要的。tenuis是最可行的选择。或者，需要新技术来改善生长缓慢的珊瑚物种在定居后的生存。
Extremely low post-settlement survival is one of the largest barriers for artificial rehabilitation ofAcroporacorals. However, little data have been found for interspecific difference of the post-settlement survival probably because the observation of coral juvenile is difficult in the field. Here, we analyzed the survival of three dominant species ofAcroporacorals (A. digitifera,A. tenuis,A. yongei), with different colony morphologies and habitat preferences, for 2 years after settlement under the same environmental conditions. The post-settlement survival was significantly higher forA. tenuisthan forA. digitifera3 months after settlement. Two years later, the survival rate ofA. tenuiswas approximately 15 times higher thanA. digitifera. In a separate analysis of three bottle-brush species (A. awi,A. echinata,A. subglabra) andA. tenuis, post-settlement survival was always higher forA. awithan for other two bottle-brush species, suggesting that the initial survival was different among morphologically sister species. Low survival was possibly associated with slow growth rates during the first 7 months. Thus, species selection is important for successful artificial coral rehabilitation, withA. tenuisbeing the most viable option. Alternatively, new techniques are required to improve post-settlement survival of slow growing coral species.