Combined effects of short-term ocean acidification and heat shock in a benthic copepod Tigriopus japonicus Mori

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• 作者：Wei Li ; Guodong Han ; Yunwei Dong ; Atsushi Ishimatsu ; Bayden D. Russell…
• 刊名：Marine Biology
• 出版年：2015
• 出版时间：September 2015
• 年：2015
• 卷：162
• 期：9
• 页码：1901-1912
• 全文大小：901 KB
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• 作者单位：Wei Li (1) (2)
  Guodong Han (1)
  Yunwei Dong (1)
  Atsushi Ishimatsu (3)
  Bayden D. Russell (4)
  Kunshan Gao (1)
  
  1. State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, 361005, China
  2. College of Life and Environmental Sciences, Huangshan University, Huangshan, 245041, China
  3. Institute for East China Sea Research, Nagasaki University, Nagasaki, 851-2213, Japan
  4. Swire Institute of Marine Science and School of Biological Sciences, The University of Hong Kong, Hong Kong SAR, China
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Ecology
  Biomedicine
  Oceanography
  Microbiology
  Zoology
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-1793

文摘

Warming of the world’s oceans is predicted to have many negative effects on organisms as they have optimal thermal windows. In coastal waters, however, both temperatures and pCO₂ (pH) exhibit diel variations, and biological performances are likely to be modulated by physical and chemical environmental changes. To understand how coastal zooplankton respond to the combined impacts of heat shock and increased pCO₂, the benthic copepod Tigriopus japonicus were treated at temperatures of 24, 28, 32 and 36 °C to simulate natural coastal temperatures experienced in warming events, when acclimated in the short term to either ambient (LC, 390 μatm) or future CO₂ (HC, 1000 μatm). HC and heat shock did not induce any mortality of T. japonicus, though respiration increased up to 32 °C before being depressed at 36 °C. Feeding rate peaked at 28 °C but did not differ between CO₂ treatments. Expression of heat shock proteins (hsps mRNA) was positively related to temperature, with no significant differences between the CO₂ concentrations. Nauplii production was not affected across all treatments. Our results demonstrate that T. japonicus responds more sensitively to heat shocks rather than to seawater acidification; however, ocean acidification may synergistically act with ocean warming to mediate the energy allocation of copepods. Communicated by H. P?rtner.Reviewed by undisclosed experts.