Please use this identifier to cite or link to this item: https://repositorio.inpa.gov.br/handle/1/17821
Title: The Hill of Six Lakes revisited: New data and re-evaluation of a key Pleistocene Amazon site
Authors: D'Apolito, Carlos
Absy, Maria Lúcia
Latrubesse, Edgardo Manuel
Keywords: Amazonia
Ecological Models
Ice Age
Last Glacial Maximum
Palaeoecology
Pollen
Sedimentary Records
Temperature Depression
Climate Change
Ecology
Forestry
Glacial Geology
Sedimentology
Lakes
Data Set
Depositional Environment
Ecological Modeling
Herb
Lacustrine Deposit
Last Glacial
Last Glacial Maximum
Lowland Environment
Paleoclimate
Paleoecology
Pleistocene
Pollen
Proxy Climate Record
Ecology
Forestry
Lakes
Pollen
Amazonas
Amazonia
Lake Pata
Issue Date: 2013
metadata.dc.publisher.journal: Quaternary Science Reviews
metadata.dc.relation.ispartof: Volume 76, Pags. 140-155
Abstract: The new analyses of a sedimentary record of Lake Pata in the Hill of Six Lakes, in NW Amazon and its correlation with other Quaternary proxy records in the region provide new insights regarding the vegetation and climate of the lowland forest during the Last Glacial. Despite what has been reported previously in the literature, the sedimentary and pollen records are not continuous. The hill remained forested; however, clear signals of structural change are seen in the record, which indicate that the area experienced a significantly drier climate during the Last Glacial Maximum (LGM). The herbs and taxa that are known to be more dominant in seasonally dry forests were all more abundant during the glacial part of the record, and the cool-adapted elements were mixed with warm lowland elements, which indicates a temperature depression. A comparison of the palaeoecological data with other regional geoenvironmental records of the Upper Negro River basin and other areas of the Amazon provides additional support for a cooler and more seasonal environment during the middle Pleniglacial, which then became drier during the LGM. A "wet" LGM is strongly refuted; therefore, the palaeoclimatic and ecological models that used the previous proxy data from Six Lakes to sustain "wet" conditions and a "continuous forest record" during the LGM to reconstruct the palaeoenvironmental conditions in the Amazon should be reviewed. © 2013 Elsevier Ltd.
metadata.dc.identifier.doi: 10.1016/j.quascirev.2013.07.013
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