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dc.contributor.authorSoares, Lucy S. H.  Concept link
dc.contributor.authorMuto, Elizabeti Y.  Concept link
dc.contributor.authorLopez, Juliana P.  Concept link
dc.contributor.authorClauzet, Gabriela R. V.  Concept link
dc.contributor.authorValiela, Ivan  Concept link
dc.date.accessioned2014-11-05T16:39:27Z
dc.date.available2014-11-05T16:39:27Z
dc.date.issued2014-10-09
dc.identifier.citationMarine Ecology Progress Series 512 (2014): 9-21en_US
dc.identifier.urihttps://hdl.handle.net/1912/6935
dc.descriptionAuthor Posting. © Inter-Research, 2014. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 512 (2014): 9-21, doi:10.3354/meps10948.en_US
dc.description.abstractTo determine whether shifts occurred in the food web associated with upwelling at the Brazilian western boundary South Atlantic Central Water (SACW), we measured isotopic composition (δ15N and δ13C) of 38 fish and 3 squid species from the Cabo Frio food web. Sampling was performed during the austral summer upwelling period (February 2002) and the austral winter non-upwelling period (July 2001). Mean lipid-corrected δ13 δ13Ccor) values ranged from -20.17 to -15.02‰, and mean δ15N ranged from 10.28 to 16.08‰. An analysis of covariance performed using length as a covariate provided evidence of seasonal effects on the mean fish δ13Ccor and δ15N, with higher values during the non-upwelling period than during the upwelling period. These effects are most likely related to biophysical processes that occurred 1 to 6 mo earlier. The data furnish circumstantial evidence of a link between the dynamics of the SACW and the trophic structure of Cabo Frio. The trophic level of the species of fish and squids ranged between the theoretical trophic levels of 3.6 and 5.1, but there were no discrete steps, rather a continuous gradient in isotopic values. This suggests that these food webs are unstructured and the component species have mixed diets.en_US
dc.description.sponsorshipWe thank the National Council for Scientific and Technological Development (CNPq) for the institutional project grant (PRONEX/Proc. no. 368/96). E.Y.M. (Proc. no. 06/5697-4) and G.R.V. (Proc. no. 06/57008-0) were funded by FAPESP, State of São Paulo Research Foundation.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherInter-Researchen_US
dc.relation.urihttps://doi.org/10.3354/meps10948
dc.subjectFood weben_US
dc.subjectStable isotopeen_US
dc.subjectUpwelling systemen_US
dc.subjectSouth-eastern Brazilen_US
dc.titleSeasonal variability of δ13C and δ15N of fish and squid in the Cabo Frio upwelling system of the southwestern Atlanticen_US
dc.typeArticleen_US
dc.identifier.doi10.3354/meps10948


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