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Holocene paleoecology, climate history and human influence in the southwestern Yucatan Peninsula

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 En: Review of Palaeobotany and Palynology volumen 217, (June 2015), páginas 1-8Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso Resumen:
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Centennial resolution pollen analysis of a record from Lake Silvituc, Yucatan Peninsula, provides a 7900 cal yr BP record of vegetation history and climate change in the Maya lowlands. Several droughts occurred during this interval, some of which are evident in other paleoclimatic records from the Caribbean region. We identified taxa that are characteristic of paleoecological change, such as Moraceae, Ficus and Asteraceae, among others. Zea mays and other taxa reflect theMaya occupation and its impact on the landscape. Droughts, as inferred fromvegetational and sedimentary changes, occurred during the intervals of 4700-3600 cal yr BP, 3400-2500 cal yr BP, 2300-2100 cal yr BP, 1900-1700 cal yr BP, 1400-1300 cal yr BP, 730 cal yr BP and 560 cal yr BP. During these periods, tropical forest taxa elements declined (Moraceae, Brosimumalicastrum, Ficus and Fabaceae) and secondary elements increased (Asteraceae,Mimosoidae-Acacia, Chenopodiaceae Vent. and Poaceae), as did local aquatic elements (Botryococcus). Zea mays appeared 4100 cal yr BP, and other secondary elements, such as Asteraceae, Mimosoideae-Acacia, and Chenopodiaceae Vent, increased. The Preclassic abandonment is represented in the record as a shift to drier conditions and a strong decrease in forest taxa.

Número de sistema: 6693
Lista(s) en las que aparece este ítem: Ganadería, agroforestería, silvopastoril y cambio climático | Conservación de la biodiversidad 2015-2025 | Publicaciones ECOSUR sobre el cambio climático
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Centennial resolution pollen analysis of a record from Lake Silvituc, Yucatan Peninsula, provides a 7900 cal yr BP record of vegetation history and climate change in the Maya lowlands. Several droughts occurred during this interval, some of which are evident in other paleoclimatic records from the Caribbean region. We identified taxa that are characteristic of paleoecological change, such as Moraceae, Ficus and Asteraceae, among others. Zea mays and other taxa reflect theMaya occupation and its impact on the landscape. Droughts, as inferred fromvegetational and sedimentary changes, occurred during the intervals of 4700-3600 cal yr BP, 3400-2500 cal yr BP, 2300-2100 cal yr BP, 1900-1700 cal yr BP, 1400-1300 cal yr BP, 730 cal yr BP and 560 cal yr BP. During these periods, tropical forest taxa elements declined (Moraceae, Brosimumalicastrum, Ficus and Fabaceae) and secondary elements increased (Asteraceae,Mimosoidae-Acacia, Chenopodiaceae Vent. and Poaceae), as did local aquatic elements (Botryococcus). Zea mays appeared 4100 cal yr BP, and other secondary elements, such as Asteraceae, Mimosoideae-Acacia, and Chenopodiaceae Vent, increased. The Preclassic abandonment is represented in the record as a shift to drier conditions and a strong decrease in forest taxa. Inglés

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