Journal
MARINE ECOLOGY PROGRESS SERIES
Volume 575, Issue -, Pages 107-117Publisher
INTER-RESEARCH
DOI: 10.3354/meps12224
Keywords
Ocean acidification; Burrowing behaviour; Metabolism; Gene expression
Categories
Funding
- National Natural Science Foundation of China [31372503, 31672634]
- Open Fund of Key Laboratory of Exploration and Preservation of Coastal Bio-resources of Zhejiang [J2015002]
- Major Science and Technology Project of Zhejiang [2012C13005]
- Open Fund of Key Laboratory for Ecological Environment in Coastal Areas, SOA [201603]
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Although the impacts of ocean acidification on fertilization, embryonic development, calcification, immune response, and behaviour have been well studied in a variety of marine organisms, the physiological and molecular mechanism manifesting acidification stress on behavioural response remains poorly understood. Therefore, the impacts of future ocean acidification scenarios (pH at 7.8, 7.6, and 7.4) on the burrowing behaviour, Ca2+/Mg2+-ATPase activity, meta bolism, and expression of energy-producing-related genes of the razor clam Sinonovacula constricta were investigated in the present study. The results showed that elevated CO2 partial pressure (pCO(2)) (pH at 7.6 and 7.4) led to a significant reduction in the digging depth of the razor clam. In addition, exposure to pCO(2)-acidified seawater depressed the metabolism and activity of Ca2+/Mg2+-ATPase, which may partially contribute to the reduced digging depth detected. Furthermore, the expression of energy-producing-related genes was generally induced by exposure to acidified seawater and could be accounted for by an increased energy demand under acidification stress. The results obtained suggest ocean acidification may exert a behavioural impact through altering physiological condition in the razor clam.
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