Hydrological influence on the evolution of a subtropical mangrove ecosystem during the late Holocene from Babitonga Bay, Brazil

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de Azevedo, Allana Queiroz ; Jimenez-Espejo, Francisco J. ; Franca, Marlon Carlos ; Garcia-Alix, Antonio ; da Silva, Fernando A. Borges ; Pessenda, Luiz C. R. ; Cohen, Marcelo C. L. ; Fontes, Neuza A. ; Pinheiro, Vanessa C. ; Macario, Kita ; Melo Jr, Joao C. F. Jr ; Piccolo, Marisa de C. ; Bendassolli, Jose A.

• Tipo de documento: Artigo Científico
• Fonte: PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY; v. 574, p. 16-pg., 2021-05-22.

Resumo

Mangroves are key ecosystems which respond to global changes in tropical and subtropical regions worldwide. We describe late Holocene mangroves that established close to the southernmost limit (28 degrees S) for this type of ecosystem in South America. Our findings are based on a C-14 dated core obtained from Babitonga Bay, Santa Catarina State, Brazil (26 degrees 12'S, 48 degrees 33'W). Analysis of palynology, sedimentary facies, isotopic and elemental data shows that mangrove establishment took place similar to 500 yrs. B.C.E., following an increase in humidity, and expanded further during the Roman Warm Period and at the end of Dark Age Cold Period. Mangrove and precipitation proxies records appear to be sensitive to rainfall patterns imposed both by the expansion/retraction of the Intertropical Convergence Zone and also the interaction with the South Atlantic Subtropical Anticyclone which affects coastal region due to sea surface temperature variations. (AU)

• Processo FAPESP: 11/00995-7 - Estudos paleoambientais interdisciplinares na costa do Espírito Santo
• Beneficiário: Luiz Carlos Ruiz Pessenda
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático
• Processo FAPESP: 17/03304-1 - Impactos das mudanças climáticas e das flutuações do nível do mar nos manguezais brasileiros em escalas secular e milenar
• Beneficiário: Luiz Carlos Ruiz Pessenda
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Regular
• Processo FAPESP: 20/13715-1 - Dinâmica dos manguezais americanos nos limites austral e boreal em escalas secular e decadal
• Beneficiário: Luiz Carlos Ruiz Pessenda
• Modalidade de apoio: Auxílio à Pesquisa - Regular