Effects of Elevated Seawater pCO2 on Early Development of Scallop Argopecten irradias (Lamarck, 1819)  

作　　者：WANG Weimin LIU Guangxing ZHANG Tianwen CHEN Hongju TANG Liao MAO Xuewei WANG Weimin;LIU Guangxing;ZHANG Tianwen;CHEN Hongju;TANG Liao;MAO Xuewei(The Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, P. R. China;College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, P. R. China;Mariculture Institute of Shandong Province, Qingdao 266002, P. R. China)

机构地区：[1]The Key Laboratory of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, P. R. China [2]College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, P. R. China [3]Mariculture Institute of Shandong Province, Qingdao 266002, P. R. China

出　　处：《Journal of Ocean University of China》2016年第6期1073-1079,共7页中国海洋大学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (31101875);the Specialized Research Fund for the Doctoral Program of Higher Education of China (20110132120027)

摘　　要：To investigate the effects of elevated seawater p CO_2 on the early developmental stages of marine benthic calcifying organisms, we exposed the eggs and larvae of Argopecten irradias, an important bivalve species in Chinese aquaculture, in seawater equilibrated with CO_2-enriched(1000 ppm) gas mixtures. We demonstrated that elevated seawater pCO_2 significantly interfered with fertilization and larval development and resulted in an increased aberration rate. Fertilization in the treatment(pH 7.6) was 74.3% ± 3.8%, which was 9.7% lower than that in the control(p H 8.3)(84.0% ±3.0%). Hatching success decreased by 23.7%, and aberration rate increased by 30.3% under acidic condition. Larvae in acidified seawater still developed a shell during the post-embryonic phase. However, the shell length and height in the treatment were smaller than those in the control. The development of embryos differed significantly at 12 h after fertilization between the two experimental groups. Embryos developed slower in acidified seawater. Nearly half of the embryos in the control developed into D-shaped larvae at 48 h after fertilization, which were considerably more than those in the treatment(11.7%). Results suggest that future ocean acidification(OA) would cause detrimental effects on the early development of A. irradias.To investigate the effects of elevated seawater pCO2 on the early developmental stages of marine benthic calcifying or- ganisms, we exposed the eggs and larvae ofArgopecten irradias, an important bivalve species in Chinese aquaculture, in seawater equilibrated with CO2-enriched （1000ppm） gas mixtures. We demonstrated that elevated seawater pCO2 significantly interfered with fertilization and larval development and resulted in an increased aberration rate. Fertilization in the treatment （pH 7.6） was 74.3%±3.8%, which was 9.7% lower than that in the control （pH 8.3） （84.0%±3.0%）. Hatching success decreased by 23.7%, and aberration rate increased by 30.3% under acidic condition. Larvae in acidified seawater still developed a shell during the post-embryonic phase. However, the shell length and height in the treatment were smaller than those in the control. The development of embryos differed significantly at 12 h after fertilization between the two experimental groups. Embryos developed slower in acidified seawater. Nearly half of the embryos in the control developed into D-shaped larvae at 48 h after fertilization, which were considerably more than those in the treatment （11.7%）. Results suggest that future ocean acidification （OA） would cause detrimental effects on the early develop- ment ofA. irradias.

关 键 词：Argopecten irradias elevated seawater pC02 FERTILIZATION embryonic development 

分 类 号：P734[天文地球—海洋化学] S917.4[天文地球—海洋科学]