期刊
GEOPHYSICAL RESEARCH LETTERS
卷 40, 期 17, 页码 4685-4688出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/grl.50883
关键词
ocean acidification; natural variability; exposure time; coral reefs; fish
资金
- University of New South Wales
- CSIRO Wealth from Oceans Flagship top-up scholarship
- Australian Research Council Queen Elizabeth II Fellowship [ARC/DP0880815]
- ARC Centre of Excellence for Coral Reef studies
- School of Marine and Tropical Biology at JCU
Biological impacts of ocean acidification have mostly been studied using future levels of CO2 without consideration of natural variability or how this modulates both duration and magnitude of CO2 exposure. Here we combine results from laboratory studies on coral reef fish with diurnal in situ CO2 data from a shallow coral reef, to demonstrate how natural variability alters exposure times for marine organisms under increasingly high-CO2 conditions. Large in situ CO2 variability already results in exposure of coral reef fish to short-term CO2 levels higher than laboratory-derived critical CO2 levels (similar to 600 mu atm). However, we suggest that the in situ exposure time is presently insufficient to induce negative effects observed in laboratory studies. Our results suggest that both exposure time and the magnitude of CO2 levels will be important in determining the response of organisms to future ocean acidification, where both will increase markedly with future increases in CO2.
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