摘要
文章选择鹿回头近岸海域常见的板叶角蜂巢珊瑚(Favites complanata)和十字牡丹珊瑚(Pavona decussata)为研究对象,采用室内连续培养的方法,探究两种不同造礁石珊瑚对酸化和溶解有机碳(DOC)加富的响应。结果表明:酸化(p H7.6)并不会影响两种珊瑚的钙化速率和生长速率;但DOC加富(524.03±78.42μmol?L-1)使两种珊瑚的钙化速率分别降低67%和47%、生长速率降低59%和40%。当二者共同作用时,两种珊瑚的钙化速率降低30%和11%、生长速率降低46%和59%,大多没有DOC单独作用时强烈,表现出一定的拮抗作用。两种珊瑚共生虫黄藻叶绿素荧光指数(Fv/Fm)均升高后降低,板叶角蜂巢珊瑚Fv/Fm最先降低。实验表明,这两种珊瑚虽然对海洋酸化的敏感度不高,但是对有机物加富有不同的响应,板叶角蜂巢珊瑚更为敏感,可能导致这两种珊瑚在未来环境变化中有不同命运。
Two common reef-building coral species in Luhuitou offshore areas, Favites complanata and Pavona decussata,were selected in our experiments. Continuous culture experiments （21 days） were conducted to evaluate the effects ofacidification and dissolved organic carbon （DOC） enrichment on coral physiology. The results showed that： 1） acidification（pH 7.6） did not significantly affect the calcification rates and growth rates of these two coral species. However, in thetreatment of DOC enrichment （524.03∮78.42mol·L^-1）, the coral calcification rates decreased by 67% and 47%, respectively;the growth rates decreased by 59% and 40%, respectively. In the combined effects of acidification and organic matterenrichment, the calcification rates decreased by 67% and 47%, respectively; the growth rates decreased by 59% and 40%,respectively, but the reduction was less than DOC enrichment alone. To some degree, these results reflected some antagonisticaction. The maximum quantum efficiency （Fv/Fm） of these two corals all increased in the early, meanwhile; Fv/Fm of Favites complanata decreased first. 2） Favites complanata and Pavona decussata responded differently to acidification and organicmatter enrichment, indicating the species would have different fates in a changing environment in future.
出处
《热带海洋学报》
CAS
CSCD
北大核心
2018年第1期57-63,共7页
Journal of Tropical Oceanography
基金
国家自然科学基金(31370499
31370500)
国家科技支撑(2014BAC01B03)~~
