Use este identificador para citar ou linkar para este item: http://repositorio.ufc.br/handle/riufc/59899
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dc.contributor.authorCotovicz Júnior, Luiz Carlos-
dc.contributor.authorKnoppers, Bastiaan A.-
dc.contributor.authorBrandini, Nilva-
dc.contributor.authorPoirier, Dominique-
dc.contributor.authorCosta Santos, Susana J.-
dc.contributor.authorCordeiro, Renato C.-
dc.contributor.authorAbril, Gwenaël-
dc.date.accessioned2021-08-10T12:27:27Z-
dc.date.available2021-08-10T12:27:27Z-
dc.date.issued2018-
dc.identifier.citationCOTOVICZ JÚNIOR, Luiz C.; KNOPPERS, Bastiaan A.; BRANDINI, Nilva; POIRIER, Dominique; COSTA SANTOS, Suzan J.; CORDEIRO, Renato C.; ABRIL, Gwenaël. Predominance of phytoplankton-derived dissolved and particulate organic carbon in a highly eutrophic tropical coastal embayment (Guanabara Bay, Rio de Janeiro, Brazil). Biogeochemistry, Netherlands, v. 137, p. 1-14, 2018.pt_BR
dc.identifier.issn0003-2697-
dc.identifier.urihttp://www.repositorio.ufc.br/handle/riufc/59899-
dc.description.abstractWe investigate the carbon dynamics in Guanabara Bay, an eutrophic tropical coastal embayment surrounded by the megacity of Rio de Janeiro (southeast coast of Brazil). Nine sampling campaigns were conducted for dissolved, particulate and total organic carbon (DOC, POC and TOC), dissolved inorganic carbon (DIC), partial pressure of CO2 (pCO2), chlorophyll a (Chl a), pheo-pigments and ancillary parameters. Highest DOC, POC and Cha concentrations were found in confined-shallow regions of the bay during the summer period with strong pCO2 undersaturation, and DOC reached 82 mg L-1 , POC 152 mg L-1 , and Chl a 800 lg L-1 . Spatially and temporally, POC and DOC concentrations varied positively with total pigments, and negatively with DIC. Strong linear correlations between these parameters indicate that the production of TOC translates to an equivalent uptake in DIC, with 85% of the POC and about 50% of the DOC being of phytoplanktonic origin. Despite the shallow depths of the bay, surface waters were enriched in POC and DOC relative to bottom waters in periods of high thermohaline stratification. The seasonal accumulation of phytoplankton-derived TOC in the surface waters reached about 105 g C m-2 year-1 , representing between 8 and 40% of the net primary production. The calculated turnover time of organic carbon was 117 and 34 days during winter and summer, respectively. Our results indicate that eutrophication of coastal bays in the tropics can generate large stocks of planktonic biomass and detrital organic carbon which are permanently being produced and partially degraded and buried in sediments.pt_BR
dc.language.isoenpt_BR
dc.publisherBiogeochemistrypt_BR
dc.subjectCarbono- Ciclopt_BR
dc.subjectCarbono-dinâmicapt_BR
dc.titlePredominance of phytoplankton-derived dissolved and particulate organic carbon in a highly eutrophic tropical coastal embayment (Guanabara Bay, Rio de Janeiro, Brazil)pt_BR
dc.typeArtigo de Periódicopt_BR
dc.title.enPredominance of phytoplankton-derived dissolved and particulate organic carbon in a highly eutrophic tropical coastal embayment (Guanabara Bay, Rio de Janeiro, Brazil)pt_BR
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