摘要
在实验室条件下对澄黄滨珊瑚(Porites lutea)和斯氏角孔珊瑚(Goniopora stutchburyi)进行温度、pH、磷酸盐和铜离子4种环境因子的胁迫试验。结果表明,温度、pH、磷酸盐和铜离子含量对2种珊瑚单位面积虫黄藻密度和叶绿素a含量有重要影响,对照组和试验组间差异显著(p<0.05)。随着水环境温度升高、pH降低、磷酸盐和铜离子浓度增加,澄黄滨珊瑚和斯氏角孔珊瑚分泌黏液,触手逐渐回缩,直至全部紧缩,颜色逐渐变浅,白化死亡。澄黄滨珊瑚在25℃和28℃时有较高的虫黄藻密度,在28℃时有较高的叶绿素a含量;斯氏角孔珊瑚在28℃时单位面积虫黄藻密度与叶绿素a含量都达到最高值。在pH 6.5时,2种珊瑚单位面积虫黄藻密度和叶绿素a含量均达到最高值。澄黄滨珊瑚在磷酸盐浓度5.0μmol·L 1时,单位面积虫黄藻密度和叶绿素a含量达到最高值;斯氏角孔珊瑚在未添加磷酸盐时,单位面积虫黄藻密度和叶绿素a含量为最高值。在铜离子浓度为4μg·L 1时,2种珊瑚有较高的单位面积虫黄藻密度和叶绿素a含量。2种珊瑚比较,澄黄滨珊瑚单位面积虫黄藻密度和叶绿素a含量明显低于斯氏角孔珊瑚。
Under laboratory condition, a stress experiment of four environmental factors （temperature, pH, phosphate and copper） on scleractinian （Porites Iutea and Goniopora stutchburyi） was carried. The results suggested the four environmental factors have significant impacts on the areal zooxanthellae density and zooxanthellae chlorophyll-a content of two coral species and show a significant differences between control and treatment （p〈0.05）. Along with the increase of temperature, the decrease of pH, and the increases of phosphate concentration and copper concentration in the seawater, two coral species were stimulated to have slime secretion at first, and then their tentacle lost activity density and coral surfaces lost colors until bleached. Porites lutea had a higher areal zooxanthellae density at 25℃ and 28℃ and had a higher zooxanthellae chlorophyll-a content at 28℃. Both parameters of Goniopora stutchburyi peaked at 28℃. Both parameters of the two coral species peaked at pH 6.5. Both parameters of Porites lutea rose to the top under 5.0μmol·L^-1 of phosphate. Both parameters of Goniopora stutchburyi were maximize at no additional phosphate. Both parameters of the two coral species were maximize at 4μg·L^-1 of copper. Comparison between the two coral species, both parameters ofPorites lutea were obviously lower than those of Goniopora stutchburyi.
出处
《热带海洋学报》
CAS
CSCD
北大核心
2013年第3期72-77,共6页
Journal of Tropical Oceanography
基金
国家海洋公益性行业科研专项(201105012)
广东省自然科学基金项目(10152408801000005
S2011010000269)
广东省科技计划项目(2011B031100012
2012A020602050)
关键词
温度
pH
磷酸盐
铜离子
虫黄藻
叶绿素A
珊瑚
temperature
pH
phosphate
copper
zooxanthellae
chlorophyll-a
coral
