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Resilience of coral communities under the global climate change: supply of coral larvae from Kerama Islands to Okinawa Island, and recovery of coral communities in Okinawa I

全球气候变化下珊瑚群落的恢复力：庆良间群岛向冲绳本岛供应珊瑚幼虫以及冲绳珊瑚群落的恢复Ⅰ

基本信息

批准号：
16310158
负责人：
SAKAI Kazuhiko
金额：
$ 4.35万
依托单位：
University of the Ryukyus
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

项目摘要

1. Coral populations at Kerama Islands are shown to be larval sources for Okinawa Island in spawning corals from the field study; recruitment of spawning corals was greater on reefs in Okinawa I. where closer to Kerama Is. In contrast, very little larvae were supplied from Kerama Is. to Okinawa I. in brooding corals.2. There was a large recruitment of spawning corals (mainly acroporids) in Okinawa I. after the mass coral bleaching in 1998, but most of the recruits did not survive on most reefs. Mortality duet to predation by the coral eating starfish, Acanthaster planci, was greatest of detected mortality factors. As a result, recovery of coral communities was very limited in terms of number of reefs in Okinawa I.; coral cover reached 30% at 10% of the study sites (n=18) in 2006.3. Analysis of change in coral cover from long-term monitoring revealed that recovery potential of coral communities had been much declined around Sesoko I., which is located at northern part of Okinawa I., in the last 25 years.4. Coral recruitment in Okinawa I. was drastically decreased by reduction of adult coral colonies at Kerama Is. due to predation by out-braking A. planci after 2002.5. Dispersal distance of acroporid corals that have long planktonic period as larvae was suggested to be limited within 200 km from parent colonies.6. Contact with macroalgae decreased growth rate and fecundity of Acropora corals. The corals with contact with macroalgae appear to consume their resource for repairing injury caused by the contact, remaining small amount of resource for growth and reproduction.

1.实地研究表明，角马群岛的珊瑚种群是冲绳岛产卵珊瑚的幼虫来源；在冲绳I岛的珊瑚礁上，产卵珊瑚的招募更多，那里离角马更近。相比之下，从Kerama is提供的幼虫非常少。冲绳1.在孵化的珊瑚中。在1998年大规模珊瑚漂白之后，冲绳一号有大量的产卵珊瑚(主要是顶孔珊瑚)被招募，但大多数被招募的珊瑚都没有在大多数珊瑚礁上生存下来。在检测到的死亡因素中，食珊瑚海星捕食造成的死亡率最高。因此，冲绳珊瑚礁数量的恢复非常有限；2006.3年，有10%的研究地点(n=18)的珊瑚覆盖率达到30%。对长期监测的珊瑚覆盖变化的分析表明，在过去的25年里，位于冲绳一号北部的Sesoko I周围珊瑚群落的恢复潜力大大下降。冲绳一号的珊瑚补充量由于赤间一号的成年珊瑚群落减少而急剧减少。由于2002.5年后的捕食行为超过了A.planci。以浮游期较长的顶孔珊瑚为幼体，其扩散距离应控制在距亲代群落200公里以内。接触大型藻类降低了顶孢菌珊瑚的生长速度和繁殖力。与大型藻类接触的珊瑚似乎消耗了它们的资源来修复接触造成的伤害，剩下少量的资源用于生长和繁殖。

项目成果

期刊论文数量（26）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Acroporid corals inhabiting over a unique methane-bubbling hydrothermal vent field in a coral reef of Southern Ryukyu Archipelago.

顶孔珊瑚栖息在琉球群岛南部珊瑚礁独特的甲烷气泡热液喷口场上。

DOI：
发表时间：
2006
期刊：
Coral Reefs 25
影响因子：
0
作者：
Nakamura;T.;Yamazaki;S.;Sakai;K.;Yamasaki;H.;Furushima;Y;Yamamoto;H.
通讯作者：
H.

Status of Coral Reefs around the Country: Okinawa Island, p.182-184

全国珊瑚礁现状：冲绳岛，第 182-184 页

DOI：
发表时间：
2004
期刊：
In "Status of Coral Reefs Around the Country" (Japanese Ministry of Environment)
影响因子：
0
作者：
Nishikawa A.;Sakai K;Sakai K.
通讯作者：
Sakai K.

Effect of colony size and age on resource allocation between growth and sexual reproduction in the colonial corals Goniastrea aspera and Favites chinensis.

群落大小和年龄对群居珊瑚 Goniastrea aspera 和 Favites chinensis 生长和有性生殖之间资源分配的影响。