Humid and cold forest connections in South America between the eastern Andes and the southern Atlantic coast during the LGM

Autor(es):Mostrar menos -

Pinaya, Jorge Luiz Diaz ; Pitman, Nigel C. A. ; Cruz, Francisco William ; Akabane, Thomas K. ; Lopez, Maria del Carmen Sanz ; Pereira-Filho, Augusto Jose ; Grohman, Carlos H. ; Reis, Luiza Santos ; Rodrigues, Erika S. Ferreira ; Ceccantini, Gregorio C. T. ; De Oliveira, Paulo Eduardo

• Tipo de documento: Artigo Científico
• Fonte: SCIENTIFIC REPORTS; v. 14, n. 1, p. 20-pg., 2024-01-24.

Resumo

The presence of Andean plant genera in moist forests of the Brazilian Atlantic Coast has been historically hypothesized as the result of cross-continental migrations starting at the eastern Andean flanks. Here we test hypotheses of former connections between the Atlantic and Andean forests by examining distribution patterns of selected cool and moist-adapted plant arboreal taxa present in 54 South American pollen records of the Last Glacial Maximum (LGM), ca. 19-23 cal ka, known to occur in both plant domains. Pollen taxa studied include Araucaria, Drimys, Hedyosmum, Ilex, Myrsine, Podocarpus, Symplocos, Weinmannia, Myrtaceae, Ericaceae and Arecaceae. Past connectivity patterns between these two neotropical regions as well as individual ecological niches during the LGM were explored by cluster analysis of fossil assemblages and modern plant distributions. Additionally, we examined the ecological niche of 137 plant species with shared distributions between the Andes and coastal Brazil. Our results revealed five complex connectivity patterns for South American vegetation linking Andean, Amazonian and Atlantic Forests and one disjunction distribution in southern Chile. This study also provides a better understanding of vegetation cover on the large and shallow South American continental shelf that was exposed due to a global sea level drop. (AU)

• Processo FAPESP: 17/50085-3 - PIRE: educação e pesquisa em clima das Américas usando os exemplos de anéis de árvores e espeleotemas (PIRE-CREATE)
• Beneficiário: Francisco William da Cruz Junior
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 15/50683-2 - Vulnerabilidade de populações sob cenários extremos
• Beneficiário: Paulo Eduardo de Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Programa de Pesquisa sobre Mudanças Climáticas Globais - Temático