Effects of ocean acidification and warming on the growth and calcification of two reef-building corals
To explore the effects of ocean warming and acidification on coral growth and calcification rate,two widespread coral species,Pocillopora damicornis and Galaxea fascicularis,in the Luhuitou area of the Sanya Bay,were selected for a 28-days controlled incubation experiment.With the interactive treatments of temperatures and pCO2,our results indicated that corals were significantly affected by seawater acidification.Moreover,acidification affected strongly the growth rate of G.fascicularis and the calcification rate of P.damicornis.The chlorophyll fluorescence index(Fv/Fm)of the symbiotic zooxanthellae in P.damicornis was significantly higher than G.fascicularis.Interestingly,the quantitative study showed that there was an antagonistic effect between temperature and pH at some levels,which could effectively alleviate coral bleaching.Thus,we concluded that the growth and calcification rate exhibited interspecific specificity in response to seawater warming and acidification.
万方数据
维普
