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No. de sistema: 000059479

LDR _ _ 00000nab^^22^^^^^za^4500
008 _ _ 190826m20199999mx^^r^p^^^^^^z0^^^a0eng^d
040 _ _ a| ECO
c| ECO
043 _ _ a| ncbh---
044 _ _ a| xx
245 0 0 a| Wetland geomorphology and paleoecology near Akab Muclil, Rio Bravo floodplain of the Belize coastal plain
506 _ _ a| Disponible para usuarios de ECOSUR con su clave de acceso
520 1 _ a| To understand wetland geomorphology and paleoecology, we collected a 2.6 m sediment core from a flooded swamp adjacent to the Maya archaeological site of Akab Muclil in the Maya Lowlands of northwestern Belize. The site of Akab Muclil has a known occupation that persisted from Early Maya Classic (1700–1350 BP) through the Terminal Maya Classic (1180–1050 BP) and into the Postclassic (1050–450 BP) and lies near a vast networkof ancient Maya canal andfield systems. We analyzed this core using a combination of paleoecological and geochemical techniques to determine the history of land use and natural change over time within this wetland. Accelerator Mass Spectrometry dating, pollen, charcoal analysis, micropaleontology, geochemical analysis, andmagnetic susceptibility provide a suite of methods from which we interpret the geomorphic and ecological history of this wetland system. Four AMS dates from the length of the core provide us with an age model that runs from 1675 cal BP through the Maya Classic onward to the present. At the base of this system, soil composition and chemistry provide evidence that the system changed from a seasonally wet terrestrial soil to a perennially wet swamp, as the basal Mollisol soil lies buried by peats and calcareous sediments.
520 1 _ a| This shift to a perennial wetland could be related to ancient Maya water management or a natural geomorphic change, though we suspect the former because of nearby ancient Maya large-scale geomorphic and hydrological manipulation in the form of intensive canalization and agriculture. Evidence of ancient Maya uses and impacts, including sedimentation, Zea mays pollen, and high charcoal counts occur from the lowest levels of the sequence through the Classic and into the Postclassic period. Above this level, the strata change to stable peats, laminated depositsof light gray/dark gray gypsum, authigenic carbonate, and layers offibrist peat, with little evidence of human impact until recent increases in charcoal and phosphorous. This study, compared with other regional studies, indicates a later transition from terrestrial to wetland, later human impacts in the Postclassic, and a geomorphic impact record closely tied to the history of the adjacent site rather than broader land use trends.
533 _ _ a| Reproducción electrónica en formato PDF
538 _ _ a| Adobe Acrobat profesional 6.0 o superior
650 _ 4 a| Humedales
650 _ 4 a| Cambio de uso de la tierra
650 _ 4 a| Paleoambiental
650 _ 4 a| Geomorfología
650 _ 4 a| Historia
651 _ 4 a| Belice
700 1 _ a| Krause, Samantha
700 1 _ a| Beach, Timothy
e| coaut.
700 1 _ a| Luzzadder Beach, Sheryl
e| coaut.
700 1 _ a| Cook, Duncan
e| coaut.
700 1 _ a| Islebe, Gerald A.
c| Doctor
e| coaut.
700 1 _ a| Palacios Fest, Manuel R.
e| coaut.
700 1 _ a| Eshleman, Sara
e| coaut.
700 1 _ a| Doyle, Colin
e| coaut.
700 1 _ a| Guderjan, Thomas H.
e| coaut.
773 0 _
t| Geomorphology
g| Vol. 331 (April 2019), p. 146-159
x| 0169-555X
900 _ _ a| Solicítelo con su bibliotecario/a
902 _ _ a| BG / MM
904 _ _ a| Agosto 2019
905 _ _ a| Artecosur
905 _ _ a| Artfrosur
905 _ _ a| Biblioelectrónica
LNG eng
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*Solicítelo con su bibliotecario/a
Wetland geomorphology and paleoecology near Akab Muclil, Rio Bravo floodplain of the Belize coastal plain
Krause, Samantha (autor)
Beach, Timothy (autor)
Luzzadder Beach, Sheryl (autor)
Cook, Duncan (autor)
Islebe, Gerald A. (autor)
Palacios Fest, Manuel R. (autor)
Eshleman, Sara (autor)
Doyle, Colin (autor)
Guderjan, Thomas H. (autor)
Nota: Disponible para usuarios de ECOSUR con su clave de acceso
Contenido en: Geomorphology. Vol. 331 (April 2019), p. 146-159. ISSN: 0169-555X
No. de sistema: 59479
Tipo: Artículo
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Inglés

"To understand wetland geomorphology and paleoecology, we collected a 2.6 m sediment core from a flooded swamp adjacent to the Maya archaeological site of Akab Muclil in the Maya Lowlands of northwestern Belize. The site of Akab Muclil has a known occupation that persisted from Early Maya Classic (1700–1350 BP) through the Terminal Maya Classic (1180–1050 BP) and into the Postclassic (1050–450 BP) and lies near a vast networkof ancient Maya canal andfield systems. We analyzed this core using a combination of paleoecological and geochemical techniques to determine the history of land use and natural change over time within this wetland. Accelerator Mass Spectrometry dating, pollen, charcoal analysis, micropaleontology, geochemical analysis, andmagnetic susceptibility provide a suite of methods from which we interpret the geomorphic and ecological history of this wetland system. Four AMS dates from the length of the core provide us with an age model that runs from 1675 cal BP through the Maya Classic onward to the present. At the base of this system, soil composition and chemistry provide evidence that the system changed from a seasonally wet terrestrial soil to a perennially wet swamp, as the basal Mollisol soil lies buried by peats and calcareous sediments."

"This shift to a perennial wetland could be related to ancient Maya water management or a natural geomorphic change, though we suspect the former because of nearby ancient Maya large-scale geomorphic and hydrological manipulation in the form of intensive canalization and agriculture. Evidence of ancient Maya uses and impacts, including sedimentation, Zea mays pollen, and high charcoal counts occur from the lowest levels of the sequence through the Classic and into the Postclassic period. Above this level, the strata change to stable peats, laminated depositsof light gray/dark gray gypsum, authigenic carbonate, and layers offibrist peat, with little evidence of human impact until recent increases in charcoal and phosphorous. This study, compared with other regional studies, indicates a later transition from terrestrial to wetland, later human impacts in the Postclassic, and a geomorphic impact record closely tied to the history of the adjacent site rather than broader land use trends."


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