水体浑浊度对不同造礁石珊瑚种类共生虫黄藻的影响

以多孔鹿角珊瑚(Acropora millepora)、鼻形鹿角珊瑚(Acropora nasuta)、鹿角杯形珊瑚(Pocillopora damicornis)、丛生盔形珊瑚(Galaxea fascicularis)和澄黄滨珊瑚(Porites lutea)为材料,用不同浓度的灭活大肠杆菌液模拟不同梯度的水体浑浊度,研究了造礁石珊瑚共生虫黄藻对水体浑浊度变化的响应.结果表明,水体浑浊度对造礁石珊瑚共生虫黄藻光合效率和密度均有不同程度影响,且抑制作用随浑浊度的增加而加强;不同种类的造礁石珊瑚共生虫黄藻对水体浑浊度的耐受能力不同,块状的丛生盔形珊瑚和澄黄滨珊瑚的耐受能力较强,枝状的多孔鹿角珊瑚、鼻形鹿角珊瑚和鹿角杯形珊瑚的耐受能力相对较弱.

Effects of water turbidity on the symbiotic zooxanthella of hermatypic corals

Five species of reef-building coral (Acropora millepora, Acropora nasuta, Pocillopora damicornis, Galaxea fascicularis and Porites lutea) were used to study the effects of water turbidity stress on the symbiotic zooxanthella. The gradients of water turbidity were simulated using a solution containing different concentrations of inactivated Escherichia coli. The results revealed that the photosynthetic efficiency and density of the symbiotic zooxanthella were both restricted by the water turbidity, and that high turbidity corresponds to high inhibitory action. The results also showed that the tolerance of the five symbiotic zooxanthella to water turbidity differed, with the massive corals Galaxea fascicularis and Porites lutea having strong tolerance, and that of the branching corals Acropora millepora, Acropora nasuta and Pocillopora damicornis being relatively weak.