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No. de sistema: 000035218

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 101018m20059999xx^^r^p^^^^^^z0^^^a0eng^d
040 _ _ a| ECO
c| ECO
043 _ _ a| n-mx-me
044 _ _ a| xx
100 1 _ a| Ludlow Wiechers, Beatriz Margarita
245 1 0 a| Paleoecological and climatic changes of the Upper Lerma Basin, Central Mexico during the Holocene
520 1 _ a| The record of Almoloya Lake in the Upper Lerma basin starts with the deposition of the late Pleistocene Upper Toluca Pumice layer. The data from this interval indicate a period of climatic instability that lasted until 8500 cal yr B.P., when temperature conditions stabilized, although moisture fluctuations continued until 8000 cal yr B.P. Between 8500 and 5000 cal yr B.P. a temperate climate is indicated by dominance of Pinus. From 5000 to 3000 cal yr B.P. Quercus forest expanded, suggesting a warm temperate climate: a first indication of drier environmental conditions is an increase in grassland between 4200 and 3500 cal yr B.P. During the Late Holocene (3300 to 500 cal yr B.P.) the increase of Pinus and grassland indicates temperate dry conditions, with a considerable increase of Pinus between 1100 and 950 cal yr B.P. At the end of this period, humidity increased. The main tendency during the Holocene was a change from humid to dry conditions. During the Early Holocene, Almoloya Lake was larger and deeper; the changing humidity regime resulted in a fragmented marshland, with the presence of aquatic and subaquatic vegetation types.
650 _ 4 a| Composición botánica
650 _ 4 a| Cuaternario
650 _ 4 a| Cambio climático
650 _ 4 a| Palinología
650 _ 4 a| Paleoecología
651 _ 4 a| Río Lerma (México, México)
700 1 _ a| Almeida Leñero, Lucía
e| coaut.
700 1 _ a| Islebe, Gerald A.
c| Doctor
e| coaut.
773 0 _
t| Quaternary Research
g| Vol. 64, no. 3 (November 2005), p. 318-332
902 _ _ a| GOG / MM
904 _ _ a| Octubre 2010
905 _ _ a| Artecosur
905 _ _ a| Biblioelectrónica
LNG eng
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Paleoecological and climatic changes of the Upper Lerma Basin, Central Mexico during the Holocene
Ludlow Wiechers, Beatriz Margarita (autor)
Almeida Leñero, Lucía (autor)
Islebe, Gerald A. (autor)
Contenido en: Quaternary Research. Vol. 64, no. 3 (November 2005), p. 318-332.
No. de sistema: 35218
Tipo: Artículo
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Inglés

"The record of Almoloya Lake in the Upper Lerma basin starts with the deposition of the late Pleistocene Upper Toluca Pumice layer. The data from this interval indicate a period of climatic instability that lasted until 8500 cal yr B.P., when temperature conditions stabilized, although moisture fluctuations continued until 8000 cal yr B.P. Between 8500 and 5000 cal yr B.P. a temperate climate is indicated by dominance of Pinus. From 5000 to 3000 cal yr B.P. Quercus forest expanded, suggesting a warm temperate climate: a first indication of drier environmental conditions is an increase in grassland between 4200 and 3500 cal yr B.P. During the Late Holocene (3300 to 500 cal yr B.P.) the increase of Pinus and grassland indicates temperate dry conditions, with a considerable increase of Pinus between 1100 and 950 cal yr B.P. At the end of this period, humidity increased. The main tendency during the Holocene was a change from humid to dry conditions. During the Early Holocene, Almoloya Lake was larger and deeper; the changing humidity regime resulted in a fragmented marshland, with the presence of aquatic and subaquatic vegetation types."