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Origin and composition of sediment organic matter in a coastal semi-enclosed ecosystem: An elemental and isotopic study at the ecosystem space scale ArchiMer
Dubois, S.; Savoye, N.; Gremare, Antoine; Plus, Martin; Charlier, K.; Beltoise, A.; Blanchet, Hugues.
The origin and composition of sediment organic matter (SOM) were investigated together with its spatial distribution in the Arcachon Bay - a macrotidal lagoon that shelters the largest Zostera noltii meadow in Europe - using elemental and isotopic ratios. Subtidal and intertidal sediments and primary producers were both sampled in April 2009. Their elemental and isotopic compositions were assessed. Relative contributions of each source to SOM were estimated using a mixing model. The SOM composition tended to be homogeneous over the whole ecosystem and reflected the high diversity of primary producers in this system. On average, SOM was composed of 25% of decayed phanerogams, 19% of microphytobenthos, 20% of phytoplankton, 19% of river SPOM and 17% of...
Tipo: Text Palavras-chave: Sediment organic matter; Primary producers; C and N stable isotopes; Zostera noltii; Arcachon Bay.
Ano: 2012 URL: http://archimer.ifremer.fr/doc/00073/18426/16059.pdf
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