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Protracted drought during the late Holocene in the Lacandon rain forest, Mexico

Por: Domínguez Vázquez, Gabriela. Doctora [autor/a].
Islebe, Gerald A [caout.].
Tipo de material: Artículo en línea Artículo en línea Tema(s): Palinología | Cuaternario | SequíaDescriptor(es) geográficos: Naha, Ocosingo (Chiapas, México) | Selva Lacandona (Chiapas, México) Nota de acceso: Acceso en línea sin restricciones En: Vegetation History and Archaeobotany. volumen 17, número 3 (2008), páginas 327-333. --ISSN: 0939-6314Número de sistema: 32646Resumen:
Inglés

A 3.4 m core was obtained for paleoecological analysis from Naja Lake in the Lacandon region of southeastern Mexico. This is the first study of the Lacandon area aimed at reconstructing late Holocene environmental history. The basal section of the core yielded an AMS date of 2020 14C years B.P. The Naja pollen record shows that the lower montane rain forest characterized by Moraceae, Mimosoideae, Leguminosae and Combretaceae/Melastomataceae, coexisted with a pine-oak forest throughout the late Holocene. No Zea mays pollen was found during routine pollen counts, but the presence of both secondary pollen taxa and abundant charcoal particles suggest some degree of regional human impact. A marked increase in Pinus pollen, together with a reduction in lower montane rain forest taxa, is interpreted as evidence for a strong, protracted drought from 1260 to 730 14C years B.P.

Recurso en línea: http://link.springer.com/article/10.1007/s00334-007-0131-9/fulltext.html
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Acceso en línea sin restricciones

A 3.4 m core was obtained for paleoecological analysis from Naja Lake in the Lacandon region of southeastern Mexico. This is the first study of the Lacandon area aimed at reconstructing late Holocene environmental history. The basal section of the core yielded an AMS date of 2020 14C years B.P. The Naja pollen record shows that the lower montane rain forest characterized by Moraceae, Mimosoideae, Leguminosae and Combretaceae/Melastomataceae, coexisted with a pine-oak forest throughout the late Holocene. No Zea mays pollen was found during routine pollen counts, but the presence of both secondary pollen taxa and abundant charcoal particles suggest some degree of regional human impact. A marked increase in Pinus pollen, together with a reduction in lower montane rain forest taxa, is interpreted as evidence for a strong, protracted drought from 1260 to 730 14C years B.P. eng

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