Late Holocene environmental reconstruction using cave sediments from Belize

POLK, J and VANBEYNEN, P and REEDER, P (2007) Late Holocene environmental reconstruction using cave sediments from Belize. Quaternary Research, 68 (1). pp. 53-63. ISSN 00335894

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    Abstract

    Cave sediments collected from Reflection Cave on the Vaca Plateau, Belize show variations in the δ13C values of their fulvic acids (FAs), which indicate periods of vegetation change caused by climatic and Maya influences during the late Holocene. The δ13C values range from −27.11‰ to −21.52‰, a shift of ∼5.59‰, which suggests fluctuating contributions of C3 and C4 plants throughout the last 2.5 ka, with C4 plant input reflecting periods of Maya agriculture. Maya activity in the study area occurred at different intensities from ∼2600 cal yr BP until ∼1500 cal yr BP, after which agricultural practices waned as the Maya depopulated the area. These changes in plant assemblages were in response to changes in available water resources, with increased aridity leading to the eventual abandonment of agricultural areas. The Ix Chel archaeological site, located in the study area, is a highland site that would have been among the first agricultural settlements to be affected during periods of aridity. During these periods, minimal water resources would have been available in this highly karstified, well-drained area, and supplemental groundwater extraction would have been difficult due to the extreme depth of the water table.

    Item Type: Peer-reviewed Journal Article
    Related URLs:
    Unique ID or DOI: 10.1016/j.yqres.2007.03.002
    Publisher: Elsevier
    Keywords: Cave sediments; Central America; Fulvic acids; Maya collapse; Climate change; Karst; Paleoclimate; δ13C carbon isotope; ITCZ; Belize
    Subjects: (Z) Other or Unspecified
    Publication Sources: (3) Other Source > (3C) Other Universities
    Date Deposited: 15 Dec 2010 17:52
    Last Modified: 20 Jan 2011 14:26
    URI: http://eprints.uberibz.org/id/eprint/1140

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