【摘要】 研究当前预测2100年海洋将达到的酸化程度对马氏珠母贝(Pinctada martensii)胚胎和早期幼虫发育的影响。人工受精卵置于pH=7.70的CO2酸化海水(酸化组)和pH=8.10的对照海水(对照组)中进行胚胎和幼虫发育试验。结果表明:人工受精8h后,酸化组和对照组胚胎在各发育时期的数量分布没有明显的差异;24h后,酸化组16.6%±12.0%发育至D型幼虫,且畸形个体百分比为48.2%±9.1%;而对照组44.8%±7.4%发育至D型幼虫,畸形个体百分比仅为18.6%±11.5%。48h后,酸化组D型幼虫百分比23.0%±9.6%,畸形个体比例高达63.2%±14.1%;对照组D型幼虫59.4%±13.0%,畸形个体百分比仅为26.6%±14.5%;与对照组相比,酸化组中D型幼虫壳长和壳高明显偏小,而且壳长增长缓慢。试验表明,将来马氏珠母贝这类发生生物钙化的典型热带海洋贝类生物,其幼虫发育将会受到海洋酸化的不利影响。更多还原

【Abstract】 This study examined the impacts of ocean acidification projected to occur by the year 2100 on the development of Pinctada martensii embryo and early larva.Artificially fertilized eggs were cultured in the seawater with pH 7.70(acidified by CO2,acidified group)and pH 8.10(control group).After treated for 8 h,no obvious difference was observed in the quantitative distribution of embryo in its different development stages between acidified group and control group.After 24 h,16.6%±12.0% of the embryo in acidified group developed into D-shaped veliger larvae,and the percentage of teratogenic larvae was 48.2%±9.1%,as compared 44.8%±7.4% and 18.6%±11.5% in control group,respectively.After 48 h,23.0%±9.6% of the embryo in acidified group developed into D-shaped veliger larvae,and the percentage of teratogenic larvae was 63.2%±14.1%,while the corresponding values in control group were 59.4%±13.0% and 26.6%±14.5%,respectively.Comparing with those in control group,the shell length and height of D-larvae in acidified group were obviously lesser,and the development of the larvae was much slower.This study indicated that ocean acidification in the future would give negative effects on the larval development of calcifying marine organisms,such as P.martensii.更多还原