| Texto completo | |
| Autor(es): Mostrar menos - |
Evangelista, Heitor
;
de Paula, Raquel L. M.
;
Magalhaes, Newton
;
de Gois, Jefferson S.
;
Luna, Aderval S.
;
Cagnin, Renata C.
;
Quaresma, Valeria S.
;
Bezerra, Flavia F.
;
Dia, Jonathan P.
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V. Santos, Roberto
;
Pullen, Andre
;
Crivellari, Stefano
;
Chiessi, Cristiano M.
;
Batista, Diego B.
;
Goncalves Jr, Sergio J.
;
de Oliveira, Bruno V. X.
;
Bizelli, Pedro A. R.
;
Sodre, Eduardo D.
;
Angonese, Mariana
;
Oaquim, Anna B. J.
Número total de Autores: 20
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| Tipo de documento: | Artigo Científico |
| Fonte: | CONTINENTAL SHELF RESEARCH; v. 255, p. 14-pg., 2023-02-03. |
| Resumo | |
Abrolhos is the largest and most diverse coral reef system in the South Atlantic. It is home to several endemic coral species and a site of cetaceous reproduction. Like any other reef ecosystem worldwide, it experiences multiple disturbances associated with increasing sea surface temperatures, El Nin similar to o events, and, most recently, oil spill pollution. In addition to these global stressors, the Abrolhos region may have been impacted by coastal human interventions, a large-scale mining disaster, floods, and extra-tropical cyclones that affected the region during the last 20 years. Among these stressors, the Funda similar to o dam collapse (the largest in the Southern Hemi-sphere) deserves special attention since it delivered significant amounts of iron tailings to the nearby coast. To investigate the region's recent history, we collected, dated, and performed detailed geochemical and isotopic analyses on two coral colonies (i.e., Siderastrea stellata and Mussismilia harttii), in order to determine if effects of recent human activity on reef systems (and most recent natural impacts) could be detected thorough bio-accumulation of metals in their skeletons. In this context, we detected an abrupt increase in Fe and Mn con-centrations in the coral skeleton, which are among the main constituents of the Funda similar to o dam tailings. We show that a concomitant increase in metal concentrations tracks contaminant dispersion of the Funda similar to o dam tailings released to the western South Atlantic. Besides this event, our data also show that coastal dredging activities in the nearby coral reef site (i.e., at the Tomba channel) and two natural episodes (i.e., the flood of 2013 and the anomalous extra-tropical cyclonic activity in 2008) were also recorded in the coral skeleton based on changes in Rare Earth Elements distribution, Rb and U concentrations. (AU) | |
| Processo FAPESP: | 18/15123-4 - Perspectivas pretéritas sobre limiares críticos do sistema climático: a Floresta Amazônica e a célula de revolvimento meridional do Atlântico (PPTEAM) |
| Beneficiário: | Cristiano Mazur Chiessi |
| Modalidade de apoio: | Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Jovens Pesquisadores - Fase 2 |
| Processo FAPESP: | 20/06534-0 - Mudanças abruptas na circulação profunda da porção Oeste do Oceano Atlântico Tropical durante os últimos dois períodos glaciais |
| Beneficiário: | Stefano Crivellari |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |