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1 July 2006 UV Effects on Marine Planktonic Food Webs: A Synthesis of Results from Mesocosm Studies
Claude Belzile, Serge Demers, Gustavo A. Ferreyra, Irene Schloss, Christian Nozais, Karine Lacoste, Behzad Mostajir, Suzanne Roy, Michel Gosselin, Emilien Pelletier, Sônia M. F. Gianesella, Maria Vernet
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Abstract

UV irradiance has a broad range of effects on marine planktonic organisms. Direct and indirect effects on individual organisms have complex impacts on food-web structure and dynamics, with implications for carbon and nutrient cycling. Mesocosm experiments are well suited for the study of such complex interrelationships. Mesocosms offer the possibility to conduct well-controlled experiments with intact planktonic communities in physical, chemical and light conditions mimicking those of the natural environment. In allowing the manipulation of UV intensities and light spectral composition, the experimental mesocosm approach has proven to be especially useful in assessing the impacts at the community level. This review of mesocosm studies shows that, although a UV increase even well above natural intensities often has subtle effects on bulk biomass (carbon and chlorophyll), it can significantly impact the food-web structure because of different sensitivity to UV among planktonic organisms. Given the complexity of UV impacts, as evidenced by results of mesocosm studies, interactions between UV and changing environmental conditions (e.g. eutrophication and climate change) are likely to have significant effects on the function of marine ecosystems.

Claude Belzile, Serge Demers, Gustavo A. Ferreyra, Irene Schloss, Christian Nozais, Karine Lacoste, Behzad Mostajir, Suzanne Roy, Michel Gosselin, Emilien Pelletier, Sônia M. F. Gianesella, and Maria Vernet "UV Effects on Marine Planktonic Food Webs: A Synthesis of Results from Mesocosm Studies," Photochemistry and Photobiology 82(4), 850-856, (1 July 2006). https://doi.org/10.1562/2005-09-27-RA-699
Received: 27 September 2005; Accepted: 21 March 2006; Published: 1 July 2006
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