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Temperature effects on oxygen thresholds for hypoxia in marine benthic organisms.
- Source :
-
Global Change Biology . May2011, Vol. 17 Issue 5, p1788-1797. 10p. - Publication Year :
- 2011
-
Abstract
- The effect of warming on the oxygen requirements and the survival of benthic organisms under hypoxia was tested using a meta-analysis of published results of experiments evaluating the effects of temperature on the median lethal time and median lethal concentration of benthic macrofauna under hypoxia. The meta-analysis confirmed that survival times under hypoxia were reduced by on average 74% and that median lethal concentration increased by on average 16% when marine benthic organisms were exposed to warmer temperatures. Warming reduced survival times of marine benthic macrofauna under hypoxia by a median of 3.95±1.67 h °C and increased the oxygen thresholds for hypoxia-driven mortality by a median of 1.02±0.15% saturation °C or 0.07±0.01 mg O L °C. The corresponding Q values averaged 3.01±0.29 for the median survival time and 2.09±0.20 for the median lethal oxygen concentration. Use of these Q values predicts that the 4 °C warming expected during the 21st century will lead to survival times 35.6% lower under hypoxia and that the threshold oxygen concentrations for high mortality to occur will increase by, on average, 25.5% if bottom water temperature increased by 4 °C. Hence, ocean warming is expected to increase the vulnerability of benthic macrofauna to reduced oxygen concentrations and expand the area of coastal ecosystems affected by hypoxia. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13541013
- Volume :
- 17
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Global Change Biology
- Publication Type :
- Academic Journal
- Accession number :
- 59701728
- Full Text :
- https://doi.org/10.1111/j.1365-2486.2010.02343.x