2011
DOI: 10.1002/jqs.1445
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Vegetation changes in the Neotropical Gran Sabana (Venezuela) around the Younger Dryas chron

Abstract: The occurrence of the Younger Dryas cold reversal in northern South America midlands and lowlands remains controversial. We present a palaeoecological analysis of a Late Glacial lacustrine section from a midland lake (Lake Chonita, 4.6501 8N, 61.0157 8W, 884 m elevation) located in the Venezuelan Gran Sabana, based on physical and biological proxies. The sediments were mostly barren from $15.3 to 12.7 k cal a BP, probably due to poor preservation. A ligneous community with no clear modern analogues was dominan… Show more

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Cited by 24 publications
(36 citation statements)
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References 77 publications
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“…There is some archeological evidence consisting of pre-Hispanic remains (spearheads and bifacial worked knives) similar in style to others that are about 9000 yr old found in other Venezuelan localities (Gassón, 2002;Rostain, 2008). In addition, palynological evidence indicating the occurrence of intense and extensive fires during the Younger Dryas (around 12,400 cal yr BP), suggested a potential early human occupation of the GS as one of the potential factors for fire occurrence (Montoya et al, 2011), but a definitive assessment is not yet possible.…”
Section: Study Areasupporting
confidence: 62%
See 1 more Smart Citation
“…There is some archeological evidence consisting of pre-Hispanic remains (spearheads and bifacial worked knives) similar in style to others that are about 9000 yr old found in other Venezuelan localities (Gassón, 2002;Rostain, 2008). In addition, palynological evidence indicating the occurrence of intense and extensive fires during the Younger Dryas (around 12,400 cal yr BP), suggested a potential early human occupation of the GS as one of the potential factors for fire occurrence (Montoya et al, 2011), but a definitive assessment is not yet possible.…”
Section: Study Areasupporting
confidence: 62%
“…The lake is within a treeless savanna landscape, surrounded by scattered morichal patches. In the absence of a known local name for the lake, it will be called Lake Chonita for the purposes of the present study, to be consistent with previous studies developed at the same site (Montoya et al, 2011). The core (PATAM1 B07; 4.67 mlong) was obtained in the deepest part of the lake (3.13 m water depth), using a modified Livingstone squared-rod piston core (Wright et al, 1984).…”
Section: Methodsmentioning
confidence: 79%
“…5). This is among the earliest burning evidence found in northern Sotuh America (Montoya et al, 2011c) although these fires could not be attributed to any known cause. As stated above, evidence for human occupation during that time is also lacking (Gassón, 2002).…”
Section: Palaeoecological Recordsmentioning
confidence: 74%
“…In the other sites, Mauritia and its pollen was absent for different reasons. The localities called Ariwe and El Oso were above the upper distribution boundary of this palm species but Mapaurí, Colonia and El Paují were below 1000 m elevation and the absence of Mauritia in these sites is still a matter of discussion (Rull, 2007;Montoya et al, 2011c;Leal et al, 2013). The summary pollen diagrams obtained in these localities show that Mauritia pollen had been absent during the Lateglacial and most of the Holocene, and did not colonised these sites until the last ~2000 years (Fig.…”
Section: Palaeoecological Recordsmentioning
confidence: 92%
“…Palms (e.g., Mauritia, Attalea, Astrocaryum, Euterpe, Elaeis, and Oenocarpus) and fruit bearing trees (e.g., Agavaceae, Caryocar, Byrsonima, Theobroma cacao, and Lecythidaceae [i.e., Bertholletia excelsa]), are among some of the most enriched species, exhibiting higher concentrations on ADE soils (Clement et al, 2003;Junqueira et al, 2010;Levis et al, 2018). Additionally, numerous paleoecological studies in non-ADE forests attribute the late Holocene increase in edible palms (e.g., Mauritia) to human cultivation and fire management (Montoya et al, 2011c;Rull and Montoya, 2014).…”
Section: Pre-columbian Impacts On Forest Compositionmentioning
confidence: 99%