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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Environmental changes reflected by sedimentary geochemistry for the last one hundred years of a tropical estuary

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Autor(es):
Friedmann Angeli, Jose Lourenco [1] ; Rubio, Belen [2] ; Mi Kim, Bianca Sung [1] ; de Lima Ferreira, Paulo Alves [1] ; Siegle, Eduardo [1] ; Lopes Figueira, Rubens Cesar [1]
Número total de Autores: 6
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Oceanog Inst, BR-05508120 Sao Paulo - Brazil
[2] Univ Vigo, Marine Geosci Dept, Vigo 36310, Pontevedra - Spain
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF MARINE SYSTEMS; v. 189, p. 36-49, JAN 2019.
Citações Web of Science: 0
Resumo

Based on multiple proxies, such as major and trace elements, mineralogy, C-org/N-total ratio and delta C-13, we assessed the natural and anthropogenic depositional record in a tropical estuary (Caravelas, Brazil). The Caravelas estuary was once a pristine area of highly important ecological role, due to its mangroves and proximity to the largest reef system in the South Atlantic (Abrolhos Archipelago). However, during the past decades, the estuary has been subjected to both natural and anthropogenic impacts, such as a natural opening of an inlet and changes in land use. This study is based on three dated cores, taken from the inlet to the main channel. A shift in the organic and inorganic proxies, in the early 1960s, shows the impact of this natural opening on the hydrodynamics and sediment distribution. Furthermore, there is a clear spatial pattern in the contribution of the main sources to the organic matter content in the cores: the core collected further away from the inlet shows a strong C3 plant contribution while the ones recovered closer show a higher marine influence. Only a slight increase in enrichment factors of the selected trace metals has been observed and they have been attributed to land use changes rather than direct inputs from industrial and urban sources. Such information is vital for the effective management of coastal systems, mainly when considering natural and ongoing anthropogenic changes in its forcing conditions that are exacerbated by climate change. (AU)

Processo FAPESP: 13/00102-8 - Avaliação da disponibilidade e enriquecimento antrópico de metais, arsênio e hidrocarbonetos em sedimentos marinhos no Estuário de Caravelas (Sul da Bahia)
Beneficiário:Rubens Cesar Lopes Figueira
Linha de fomento: Auxílio à Pesquisa - Regular