Navegando por Assunto "Relative sea-level"

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A expansão dos manguezais na foz do rio Itapicuru (Ba) durante o Antropoceno
(Universidade Federal do Pará, 2022-09-20) SANTOS, Larissa Roberta Oliveira Castro; FRANÇA, Marlon Carlos; http://lattes.cnpq.br/8225311897488790; https://orcid.org/0000-0002-3784-7702
The objective of this work was to evaluate mangrove dynamics during the Anthropocene, as well as the influence of climate change on mangroves and associated vegetation units at the mouth of the Tapicuru River in northern Bahia State, northeastern Brazil. The development of this work was carried out by integrating sedimentological, palynological, isotopic and Pb-210 dating data in a sedimentary core. The isotopic results for δ13C revealed a relatively stable pattern with depleted isotopic values (-27‰ to -23.3‰), typical of organic matter originating from C3 vegetation input. Palynology indicated the presence of five ecological groups: mangroves, herbs, trees and shrubs, palms and spores. Pollen results from T1 core show two zones (zone 1: 85-34 cm depth and zone 2: 34-0 cm depth), according to cluster analysis. Zone 1 is marked by a trend of decreasing mangrove vegetation, while zone 2 shows a trend of increasing mangrove vegetation characterized mostly by the presence of Rhizophora.