| Texto completo | |
| Autor(es): Mostrar menos - |
Sambugaro, Julia
;
Kropiwiec, Isabela Santos
;
Pereira, Luiz Gustavo
;
Sarmiento, Joel Augusto S.
;
Magalhaes, Rene H.
;
Siegle, Eduardo
;
Figueira, Rubens Cesar Lopes
;
Martins, Maria Virginia Alves
;
Bouchet, Vincent M. P.
;
Frontalini, Fabrizio
;
e Sousa, Silvia Helena de Mello
Número total de Autores: 11
|
| Tipo de documento: | Artigo Científico |
| Fonte: | MARINE ENVIRONMENTAL RESEARCH; v. 210, p. 13-pg., 2025-09-01. |
| Resumo | |
This study uses a multiproxy approach to investigate two estuarine ecosystems located along the Brazilian Atlantic coast and their historical changes. In the last century, the Santos-Sao Vicente-Bertioga Estuary (Santos) has been subjected to anthropogenic influences such as heavy industrialization and the construction of the Santos Port. The Caravelas-Nova Vi & ccedil;osa Estuary (Caravelas) has preserved most of its pristine condition but has been mainly affected by naturally driven changes after the opening of a new inlet around the 1960s. We use sedimentological, geochemical, and benthic foraminiferal indices to investigate the distinct drivers of environmental changes throughout the history of these two estuaries. Different biotic indices were tested to assess the Paleo-Ecological Quality Status (Paleo-EcoQS): the diversity index exp(H'bc), the Ecological Quality Ratio (EQR) computed based on local reference conditions, the Tolerant Species Index (TSI) and the Enhanced Benthic Foraminifera Oxygen Index (EBFOI). The Principal Component Analysis (PCA) highlights the systems' responses to different causes of impact, either anthropogenic or natural. In Santos, the PCA indicates a strong association between sediment composition, heavy metal enrichment, and the prevalence of stress-tolerant species, reflecting a decline in the Paleo-EcoQS linked to industrial and urban pressures. Caravelas exhibits a dynamic response to natural processes, with positive PCA scores correlated with organic matter inputs and sediment dynamics, suggesting resilience despite fluctuating environmental conditions. This work shows the importance of sedimentary records in distinguishing between natural and human-induced impacts, having great scientific and social relevance both for biomonitoring and informing conservation strategies. (AU) | |
| Processo FAPESP: | 21/08085-1 - Mudanças abruptas na intensidade da célula de revolvimento meridional do Atlântico e seus impactos sobre a precipitação e vegetação amazônica durante os dois últimos períodos glaciais |
| Beneficiário: | Renê Hamada Magalhães |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado Direto |
| 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 |