@article{fdi:010072022,
  title = {{P}redominance of phytoplankton-derived dissolved and particulate organic carbon in a highly eutrophic tropical coastal embayment ({G}uanabara {B}ay, {R}io de {J}aneiro, {B}razil)},
  author = {{C}otovicz, {L}. {C}. and {K}noppers, {B}. {A}. and {B}randini, {N}. and {P}oirier, {D}. and {S}antos, {S}. {J}. {C}. and {C}ordeiro, {R}. {C}. and {A}bril, {G}wena{\¨e}l},
  editor = {},
  language = {{ENG}},
  abstract = {{W}e investigate the carbon dynamics in {G}uanabara {B}ay, an eutrophic tropical coastal embayment surrounded by the megacity of {R}io de {J}aneiro (southeast coast of {B}razil). {N}ine sampling campaigns were conducted for dissolved, particulate and total organic carbon ({DOC}, {POC} and {TOC}), dissolved inorganic carbon ({DIC}), partial pressure of {CO}2 (p{CO}(2)), chlorophyll a ({C}hl a), pheo-pigments and ancillary parameters. {H}ighest {DOC}, {POC} and {C}hl a concentrations were found in confined-shallow regions of the bay during the summer period with strong p{CO}(2) undersaturation, and {DOC} reached 82 mg {L}-1, {POC} 152 mg {L}-1, and {C}hl a 800 mu g {L}-1. {S}patially and temporally, {POC} and {DOC} concentrations varied positively with total pigments, and negatively with {DIC}. {S}trong 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. {D}espite the shallow depths of the bay, surface waters were enriched in {POC} and {DOC} relative to bottom waters in periods of high thermohaline stratification. {T}he 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. {T}he calculated turnover time of organic carbon was 117 and 34 days during winter and summer, respectively. {O}ur 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.},
  keywords = {{E}utrophication ; {C}arbon dynamics ; {O}rganic carbon ; {M}arine carbonate ; system ; {S}outheastern coast of {B}razil ; {BRESIL} ; {RIO} {DE} {JANEIRO} ; {GUANABARA} {BAIE}},
  booktitle = {},
  journal = {{B}iogeochemistry},
  volume = {137},
  numero = {1-2},
  pages = {1--14},
  ISSN = {0168-2563},
  year = {2018},
  DOI = {10.1007/s10533-017-0405-y},
  URL = {https://www.documentation.ird.fr/hor/fdi:010072022},
}