Impacts of CO2-driven seawater acidification on survival, egg production rate and hatching success of four marine copepods

Abstract

Ecological experiments were conducted to examine the effects of seawater containing elevated partial pressure of carbon dioxide (\(p_{CO_2 }\) 800×10−6, 2 000×10−6, 5 000×10−6 and 10 000×10−6) on the survival and reproduction of female Acartia pacifica, Acartia spinicauda, Calanus sinicus and Centropages tenuiremis, which are the dominant copepods in the southern coastal waters of China. The results show that the effects of elevated \(p_{CO_2 }\) on the survival rates of copepods were speciesspecific. C. sinicus, which was a macro-copepod, had a higher survival rate (62.01%–71.96%) than the other three species (5.00%–26.67%) during the eight day exposure. The egg production rates of C. sinicus, A. spinicauda and C. tenuiremis were significantly inhibited by the increased pCO2 and the exposure time duration. There were significantly negative impacts on the egg hatching success of A. spinicauda and C. tenuiremis in the \(p_{CO_2 }\) 2 000×10−6 and 10 000×10−6 groups, and, in addition, the exposure time had noticeably impacts on these rates too. This study indicates that the reproductive performances of copepods were sensitive to elevated \(p_{CO_2 }\), and that the response of different copepod species to acidified seawater was different. Furthermore, the synergistic effects of seawater acidification and climate change or other pollutant stresses on organisms should be given more attention.

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Correspondence to Shaojing Li.

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Foundation item: The State Oceanic Administration Foundation of China under contract No. 200805029.

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Zhang, D., Li, S., Wang, G. et al. Impacts of CO2-driven seawater acidification on survival, egg production rate and hatching success of four marine copepods. Acta Oceanol. Sin. 30, 86–94 (2011). https://doi.org/10.1007/s13131-011-0165-9

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Key words

  • CO2-driven acidification
  • copepod
  • survival
  • reproductive performance