Impact of elevated UVB radiation on marine biota: a meta-analysis
Version of Record online: 25 JUL 2012
© 2012 Blackwell Publishing Ltd
Global Ecology and Biogeography
Volume 22, Issue 1, pages 131–144, January 2013
How to Cite
Llabrés, M., Agustí, S., Fernández, M., Canepa, A., Maurin, F., Vidal, F., Duarte, C. M. (2013), Impact of elevated UVB radiation on marine biota: a meta-analysis. Global Ecology and Biogeography, 22: 131–144. doi: 10.1111/j.1466-8238.2012.00784.x
- Issue online: 11 DEC 2012
- Version of Record online: 25 JUL 2012
- Malaspina-2010 project of the CONSOLIDER programme. Grant Number: CSD2008-00077
- project MEDEICG. Grant Number: CTM2009-07013
- UVB radiation;
- impact assessment;
- marine biota;
The emission of chlorofluorocarbon compounds eroded the ozone layer, raising incident ultraviolet B radiation to levels that affect biota. However, the role of UVB radiation (280–315 nm), which remains elevated to date, as a possible driver of the widespread global deterioration of marine ecosystems has not yet been fully quantified. In this paper we assess the magnitude of the impacts of elevated UVB radiation and evaluate the relative sensitivity to UVB across marine taxa and processes.
The analyses presented are based on 1784 experimental assessments of the impacts of UVB performed with natural radiation and organisms from different geographical areas, as well as with artificial radiation and cultured organisms at many laboratories around the world.
First we compiled the published literature concerning experimental evaluation of the impacts of UVB on marine biota. Then a meta-analysis was conducted with the data set obtained to evaluate the responses of marine organisms and processes to enhanced and reduced UVB levels.
Increased UVB radiation leads to a sharp increase in mortality rates across marine taxa, with protists, corals, crustaceans and fish eggs and larvae being most sensitive. A general relationship between relative changes in UVB doses and mortality rates was developed. This relationship can help assess the effects of changes in incident UVB radiation (past, present or future) on marine organisms.
This meta-analysis demonstrates that mortality rates of marine biota increase rapidly in response to elevated UVB radiation. The enhanced mortality rates associated with currently elevated UVB levels may represent a major threat to marine biota, possibly underlying recent widespread declines in the abundance of marine organisms ranging from corals to fish and krill.