Data/hora: 11/06/2024 11:08:55

Provedor de dados: | 39
País: | Brazil
Título: | Palynological evidence of vegetation change during the last 10,000 years in the mid-valley of the Rio Doce, Brazil
Autores: | Fonseca-Silva,Fernanda Mara; Carvalho,Marcelo de Araujo; Ribeiro,Sérvio Pontes.
Data: | 2019-03-01
Ano: | 2019
Palavras-chave: | Holocene; Paleovegetation; Parque Estadual do Rio Doce (PERD); Pollen analysis; South America.
Resumo: | ABSTRACT In order to reconstruct the vegetation history of the last 10.000 years, palynological analyses were carried out using 17 sedimentary samples of a core drilled in Parque Estadual do Rio Doce (PERD-MG). Twenty-one species of fern spores, 52 species of pollen grains and six species of fungi were identified. Phase 1 (10.375 - 9.350 cal. years BP) is characterized by a low concentration and diversity of pollen grains and is thus interpreted as a fluvial system with the presence of coarse-grained sediments. Phase 2 (9.062 - 8.195 cal. Years BP) is interpreted as a transition from a fluvial to lacustrine environment. Phase 3 (7.905 - 4.785 cal years BP) is characterized by increased trend of palynomorph concentration, highlighted by a high abundance and diversity of fern spores, which are indicative of a more a humid condition. The uppermost phase, Phase 4 (4.785 - 50 cal. Years AP), possessed a lower abundance of herbaceous flora, which is replaced by other vegetation groups (e.g. marsh, cerrado, Atlantic Forest). The uppermost sample represents the contemporary environment (~50 years), which is characterized as seasonally-flooded.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062019000100029
Editor: | Sociedade Botânica do Brasil
Relação: | 10.1590/0102-33062018abb0128
Formato: | text/html
Fonte: | Acta Botanica Brasilica  v.33 n.1 2019
Fonte: | info:eu-repo/semantics/openAccess