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3 resultados encontrados para: AUTOR: Hodell, David A.
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We employed paleolimnological methods to investigate tropical forest recovery and soil stabilization that followed abandonment of agricultural systems associated with disintegration of Classic Maya polities ca. A.D. 800–1000. We used lithological, geochemical, magnetic, and palynological data from sediment cores of Lake Petén Itzá in the Maya Lowlands of northern Guatemala. Sediment core chronology was developed using radiocarbon dates on terrestrial wood and charcoal fragments. Our results indicate that in the absence of large human populations and extensive farming activities, Petén forests recovered under humid climate conditions within a span of 80–260 yr. Soil stabilization postdates pollen evidence of forest regrowth stratigraphically, and required between 120 and 280 yr. We conclude that the tropical forest ecosystem in the watershed of Lake Petén Itzá had been reestablished by the early Postclassic Period (A.D. 1000–1200).

Resumen en: Inglés |
Resumen en inglés

Palynological studies document forest disappearance during the late Holocene in the tropical Maya lowlands of northern Guatemala. The question remains as to whether this vegetation change was driven exclusively by anthropogenic deforestation, as previously suggested, or whether it was partly attributable to climate changes. We report multiple palaeoclimate and palaeoenvironment proxies (pollen, geochemical, sedimentological) from sediment cores collected in Lake Petén Itzá, northern Guatemala. Our data indicate that the earliest phase of late Holocene tropical forest reduction in this area started at not, vert, similar 4500 cal yr BP, simultaneous with the onset of a circum-Caribbean drying trend that lasted for not, vert, similar 1500 yr. This forest decline preceded the appearance of anthropogenically associated Zea mays pollen. We conclude that vegetation changes in Petén during the period from not, vert, similar 4500 to not, vert, similar 3000 cal yr BP were largely a consequence of dry climate conditions. Furthermore, palaeoclimate data from low latitudes in North Africa point to teleconnective linkages of this drying trend on both sides of the Atlantic Ocean.

*En proceso técnico. Solicítelo con el bibliotecario de SIBE-Chetumal
A multi-proxy study of Holocene environmental change in the Maya Lowlands of Peten, Guatemala
Curtis, Jason H. (autor) ; Brenner, Mark (autor) ; Hodell, David A. (autor) ; Balser, Richard A. (autor) ; Islebe, Gerald A. (autor) ; Hooghiemstra, Henry (autor) ;
Contenido en: Journal of Paleolimnology Vol. 19, no. 2 (1998), p. 139-159 ISSN: 0921-2728
Bibliotecas: Chetumal
SIBE Chetumal
44481-10 (Disponible)
Disponibles para prestamo: 1
Nota: En proceso técnico. Solicítelo con el bibliotecario de SIBE-Chetumal