文献类型：期刊文献

英文题名：Impacts of marine heatwaves on pearl oysters are alleviated following repeated exposure

作者：Xu, Yang[1];Zhang, Yuehuan[2];Liang, Jian[1,3];He, Guixiang[1];Liu, Xiaolong[1];Zheng, Zhe[1];Dung Quang Le[4];Deng, Yuewen[1];Zhao, Liqiang[1]

机构：[1]Guangdong Ocean Univ, Fisheries Coll, Zhanjiang, Peoples R China;[2]Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangdong Prov Key Lab Appl Marine Biol, Guangzhou 510301, Peoples R China;[3]Tianjin Agr Univ, Dept Fisheries, Tianjin, Peoples R China;[4]Vietnam Natl Univ, Inst Circular Econ Dev, Ho Chi Minh City, Vietnam

年份：2021

卷号：173

外文期刊名：MARINE POLLUTION BULLETIN

收录：SCI-EXPANDED(收录号：WOS:000701587200003)、、EI(收录号：20213710900534)、Scopus(收录号：2-s2.0-85114828428)、WOS

基金：The present study has been made possible by research grants from National Natural Science Foundation of China (42076121, M-0163) , the Department of Education of Guangdong Province (2020KTSCX050) and the Starting Research Fund from Guangdong Ocean University (R20083) to LZ, and the Earmarked Fund for Modern Agro-industry Technology Research System (CARS-49) to YD.

语种：英文

外文关键词：Climate change; Marine heatwaves; Acclimation and adaptation; Bivalves; Pinctada maxima

外文摘要：Marine heatwaves (MHWs) have occurred with increasing duration, frequency and intensity in the past decade in the South China Sea, posing serious threats to marine ecosystems and fisheries. However, the impact of MHWs on marine bivalves - one of the most ecologically and economically important fauna in coastal ecosystems - remains largely unknown. Here, we investigated physiological responses of the pearl oyster, Pinctada maxima inhabiting a newly identified climate change hotspot (Beibu Gulf, South China Sea) to short-lasting and repeatedly-occurring MHWs scenarios. Following 3-day exposure to short-lasting MHWs scenarios with water temperature rapidly arising from 24 degrees C to 28 degrees C, 32 degrees C and 36 degrees C, respectively, mortality rates of pearl oysters increased, and especially they suffered 100% mortality at 36 degrees C. Activities of enzymes including acid phosphatase (ACP), alkaline phosphatase (AKP), glutathione (GSH) and level of malondialdehyde (MDA) increased significantly with increasing intensity and duration of MHWs, indicating thermal stress responses. When exposed to repeatedly-occurring MHWs scenarios, mortality rates of pearl oysters increased slightly, and thermal stress responses were alleviated, as exemplified by significant decreases in ACP, AKP, GSH and MDA activities compared with those during short-lasting MHWs scenarios, demonstrating the potential of P. maxima to acclimate rapidly to MHWs. These findings advance our understanding of how marine bivalves respond to MHWs scenarios varying in duration, frequency, and intensity.