Response of coral reef ecosystem to global warming and ocean acidification and the possible drastic change

对雪子岛珊瑚礁碳酸盐体系的时间序列观测表明，海水PCO_2=945 ppmv时，岛上珊瑚群落的钙化率为零。根据IPCC报告中提出的大气co2增加快速预测模型，认为21世纪末或以后，Sesoko珊瑚礁的钙化生物将面临严重破坏，生态系统将发生剧烈变化。珊瑚孵化研究揭示了珊瑚光合钙化代谢对光辐射胁迫、有害化学物质胁迫的特征响应，以及幼珊瑚对Sr、Mg、U等微量元素进入骨骼和骨骼矿物形成的响应。

Time-series observation of carbonate system at coral reef of Sesoko Island revealed that calcification rate of coral community around this island reaches to zero at PCO_2=945 ppmv in sea water. It is suggested that calcifying organisms in Sesoko coral reef will face to severe damage and that drastic change in ecosystem will be caused at the end of 21 century or later, according to the rapid prediction model of atmospheric CO_2 increase in IPCC report.Coral incubation studies revealed the characteristic responses of coral metabolisms of photosynthesis-calcification to light-radiation stress, hazardous chemical stress, as well as responses of trace elements incorporation such as Sr, Mg and U into skeleton and of skeletal mineral formation of juvenile coral.