重金属铜污染对石珊瑚生长影响的实验研究

doi:10.11978/j.issn.1009-5470.2011.02.057

Abstract

Abstract:

Coral reefs are among the most productive and diverse ecosystem on Earth and provide a multitude of valuable ecosystem services. However, such a valuable ecosystem is in severe decline globally because of climate warming and increase of anthropogenic activities. A few studies have demonstrated that human-induced metal pollution has vital effects on reef cor-als by stressing their symbiotic zooxanthellae growth. For the purpose of understanding the symbiotic zooxanthellae respond-ing to metals, we carried on a 72h-expermental study by exposing reef corals to different levels of copper (Cu) concentrations, observed corals’ responses to Cu pollution, and measured the zooxanthellae densities. The results show that: (1) along with the increase of copper concentration in the seawater, the coral zooxanthellae density increases at first and then continuously de-crease, until bleached; (2) high Cu2+ concentration has severe impact on the survival of reef corals and massive Porites would die shortly after exposing to an extremely high level (40.7?g•L?1) of Cu2+; and (3) the Cu2+ injured corals stimulated slime secretion at first, and then their tentacle lost activity and appeared bleaching. This study suggests copper pollution has sig-nificant impact on the survival of reef corals.

Key words: reef coral, copper pollution, acute toxicity, density of zooxanthellae

ZHOU Jie,YU Ke-fu,LI Shu,CHEN Tian-ran,ZHAO Mei-xia,SHI Qi. Experimental study of the impact of heavy metal copper on reef coral growth[J].Journal of Tropical Oceanography, 2011, 30(2): 57-66.

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Experimental study of the impact of heavy metal copper on reef coral growth

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