Palynological evidence of vegetation change during the last 10,000 years in the mid-valley of the Rio Doce, Brazil
| Autor: | Marcelo de Araujo Carvalho, Sérvio Pontes Ribeiro, Fernanda Mara Fonseca-Silva |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Palynology
geography Parque Estadual do Rio Doce (PERD) Marsh geography.geographical_feature_category Holocene Fluvial Plant Science Vegetation South America paleovegetation medicine.disease_cause lcsh:QK1-989 pollen analysis Abundance (ecology) lcsh:Botany Pollen medicine Sedimentary rock Physical geography Geology |
| Zdroj: | Acta Botânica Brasílica, Iss 0 (2018) Acta Botanica Brasilica, Volume: 33, Issue: 1, Pages: 29-38, Published: 29 NOV 2018 Acta Botanica Brasilica v.33 n.1 2019 Acta Botanica Brasilica Sociedade Botânica do Brasil (SBB) instacron:SBB |
| ISSN: | 1677-941X 0102-3306 |
| DOI: | 10.1590/0102-33062018abb0128 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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