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Ultraviolet radiation enhances Arctic net plankton community production

AuthorsGarcía-Corral, Lara S.; Agustí, Susana ; Regaudie de Gioux, Aurore ; Iuculano, Francesca; Carrillo-de-Albornoz, Paloma; Wassmann, Paul F.; Duarte, Carlos M.
KeywordsArctic Ocean
Net community production
Plankton metabolism
Surface waters
Issue Date25-Aug-2014
PublisherAmerican Geophysical Union
CitationGeophysical Research Letteres 41(16): 5960-5967 (2014)
AbstractIn this study we report the response of net community production (NCP) of plankton communities in the Arctic surface waters exposure to natural ultraviolet radiation (UVR) conditions. A possible bias in previous measurements performed using borosilicate glass bottles (opaque to most UVR) can underestimate NCP. Here we show that 77% of the sampled communities suffer, on average, 38.5% of net increase in NCP when exposed to natural UV-B condition, relative to values when UV-B radiation is excluded. UV-B tends to shift communities toward autotrophy, with the most autotrophic communities responding the strongest. This is likely explained by the inhibition of bacterial respiration during the continuous day period of the Arctic summer, corroborated by experiments where bacterial production influenced by UV-B directly affect NCP. Whereas Arctic warming is expected to lead to lower NCP, our results show that increased UV-B radiation may partially compensate this negative effect in surface waters. ©2014. American Geophysical Union.
Publisher version (URL)http://dx.doi.org/10.1002/2014GL060553
Identifiersdoi: 10.1002/2014GL060553
issn: 0094-8276
Appears in Collections:(IMEDEA) Artículos
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