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中文摘要：
本研究采用叶绿素荧光技术,选取三种鹿回头珊瑚礁区常见的珊瑚种类(Acropora valida、Galaxea astreata和Favites abdita),分别设置海水环境为450μatm、650μatm(IPCC预测的2065年的水平)、和750μatm(IPCC预测的2100年的水平)的三个pCO2浓度梯度,监测珊瑚在不同CO2浓度下10天内的光合荧光参数的变化。实验结果表明,水体pCO2为650μatm时,珊瑚的总体光合效率最高,但随着时间延长,珊瑚荧光参数在三个浓度梯度下都会显示不同程度的下降趋势。虽然三种珊瑚对不同浓度CO2的响应程度不同,但均显示出在低浓度pCO2时,pH下降引起的酸化作用控制着珊瑚共生藻的光合效率;而随着pCO2浓度增加,CO2增加引起的施肥效应则愈加明显,并与酸化作用竞争,共同作用于珊瑚共生藻,使得光合荧光参数在波动中发生变化。
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