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Title: Sedimentação em ecossistemas de mangue: estabilidade, aplicações e estocagem de carbono em relação ao nível do mar
Keywords: Ecossistema;  Carbono;  Taxa de sedimentação;  Nível do mar;  Mangue;  Produção intelectual;  Sedimentação
Issue Date: 29-May-2009
Abstract: The stability of mangrove ecosystems in selected regions along the Brazilian coast is assessed based on investigations of site specific 100 year sediment accumulation rates (SAR) relative to temporal rise in relative sea leveL Investigations on the sources of the organic matter deposited in these ecosytems were carried out to interpret if the mangrove forest is stable or migrating. Addressing this, sediment cores were collected in mangrove forests and intertidal mud flats as far north as Tamandare, Pemanbuco to Guaratuba, Parana in the South. The net SAR, as estimated by the age-depth relationships of 21OPb,confirmed by site specific methods such as contaminant and natural markers. To enrich the methodology of this and future work, atmospheric fallout radionuclides, 210Pb, 7Be, l37Cs, 239 + 240pU, were detected and included in is this study. Sediment accumulation rates vary along the Brazilian coast, which appear to be influenced by the relation of this rate to a varying sea level rise. The stratigraphies of TOC/TN, o-13CcoC)O, P, Ol5N and series of pigment results indicate site specific mangal vegetal litter and grain size variations were used to show stability or migration of the specific forest. Sediment accumulation rates in the mangrove forests ranged from 1.8 to 5,0 1llm/year, while the 1llud flat rates were between 4.0 e 7.3 mm/year.
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