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No. de sistema: 000032343

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 180629m20189999xx^^r^p^^^^^^z0^^^a0eng^d
040 _ _ a| ECO
c| ECO
043 _ _ a| n-mx-yu
044 _ _ a| xx
245 0 0 a| Holocene precipitation changes in the Maya forest, Yucatán peninsula, Mexico
506 _ _ a| Disponible para usuarios de ECOSUR con su clave de acceso
520 1 _ a| Holocene fossil pollen samples (n=38) from Lake Silvituc in Mexico were analyzed with the analog technique using modern pollen samples (n=98) of the Yucatán Peninsula, Mexico. Calculated dissimilarity indices allow us to reconstruct the vegetation and to develop a precipitation record for the last 7900 years. The Middle Holocene shows a gradual increase of precipitation and a marked drop in reconstructed precipitation around 4200 BCE. During the Late Holocene two phases were identified: Phase I (2500 BCE – 1 CE) shows the greatest increase in precipitation with four peaks around 1200 BCE, 650 BCE, 200 BCE and 1 CE. Also a period of increased precipitation resulted for the period between 200 and 500 BCE. Periods of reduced precipitation were detected at 900–1100 BCE, 500–600 BCE and 100–190 BCE. Phase II (1–2000 CE) encompasses several strong dry events during the following periods: 150–300 CE, 750–900 CE, 1050–1180 CE, and 1530–1580 CE. A strong reduction of 32% in precipitation in the late Preclassic Period (100–300 CE) was detected. Non-analogs of Phase II are associated with periods of reduced precipitation and fall into time periods of extended droughts related to the Maya Late Classic and the Little Ice Age. A limiting factor on the use of analogs for tropical forests is that a combination of different analogs for the same fossil pollen signal exists. Interpretation under these circumstances requires good knowledge of the ecology of the taxa and a priori characterization of the modern samples.
533 _ _ a| Reproducción electrónica en formato PDF
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Vegetación
650 _ 4 a| Palinología
650 _ 4 a| Cambio climático
650 _ 4 a| Paleoecología
651 _ 4 a| Yucatán (Península) (México)
700 1 _ a| Vela Pelaez, Alejandro Antonio
700 1 _ a| Torrescano Valle, Nuria
e| coaut.
700 1 _ a| Islebe, Gerald A.
c| Doctor
e| coaut.
700 1 _ a| Mas, Jean François
e| coaut.
700 1 _ a| Weissenberger, Holger
e| coaut.
773 0 _
t| Palaeogeography, Palaeoclimatology, Palaeoecology
g| Vol. 505 (September 2018), p. 42-52
x| 0031-0182
900 _ _ a| Solicítelo con su bibliotecario/a
901 _ _ a| Artículo con arbitraje
902 _ _ a| GOG / MM
904 _ _ a| Junio 2018
905 _ _ a| Artecosur
905 _ _ a| Artfrosur
905 _ _ a| Biblioelectrónica
906 _ _ a| Producción Académica ECOSUR
LNG eng
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*Solicítelo con su bibliotecario/a
Holocene precipitation changes in the Maya forest, Yucatán peninsula, Mexico
Vela Pelaez, Alejandro Antonio (autor)
Torrescano Valle, Nuria (autor)
Islebe, Gerald A. (autor)
Mas, Jean François (autor)
Weissenberger, Holger (autor)
Nota: Disponible para usuarios de ECOSUR con su clave de acceso
Contenido en: Palaeogeography, Palaeoclimatology, Palaeoecology. Vol. 505 (September 2018), p. 42-52. ISSN: 0031-0182
No. de sistema: 32343
Tipo: - Artículo con arbitraje
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"Holocene fossil pollen samples (n=38) from Lake Silvituc in Mexico were analyzed with the analog technique using modern pollen samples (n=98) of the Yucatán Peninsula, Mexico. Calculated dissimilarity indices allow us to reconstruct the vegetation and to develop a precipitation record for the last 7900 years. The Middle Holocene shows a gradual increase of precipitation and a marked drop in reconstructed precipitation around 4200 BCE. During the Late Holocene two phases were identified: Phase I (2500 BCE – 1 CE) shows the greatest increase in precipitation with four peaks around 1200 BCE, 650 BCE, 200 BCE and 1 CE. Also a period of increased precipitation resulted for the period between 200 and 500 BCE. Periods of reduced precipitation were detected at 900–1100 BCE, 500–600 BCE and 100–190 BCE. Phase II (1–2000 CE) encompasses several strong dry events during the following periods: 150–300 CE, 750–900 CE, 1050–1180 CE, and 1530–1580 CE. A strong reduction of 32% in precipitation in the late Preclassic Period (100–300 CE) was detected. Non-analogs of Phase II are associated with periods of reduced precipitation and fall into time periods of extended droughts related to the Maya Late Classic and the Little Ice Age. A limiting factor on the use of analogs for tropical forests is that a combination of different analogs for the same fossil pollen signal exists. Interpretation under these circumstances requires good knowledge of the ecology of the taxa and a priori characterization of the modern samples."


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