TY - JOUR

T1 - Combining charcoal sediment and molecular markers to infer a Holocene fire history in the Maya Lowlands of Petén, Guatemala

AU - Schüpbach, S.

AU - Kirchgeorg, Torben

AU - Colombaroli, Daniele

AU - Beffa, Giorgia

AU - Radaelli, Marta

AU - Kehrwald, Natalie

AU - Barbante, Carlo

N1 - Funding Information: The research leading to these results has received funding from the Swiss National Science Foundation (project No. 142063 ) and the European Research Council under the European Union's Seventh Framework Programme (FP7/2007-2013)/ERC Grant agreement No. 267696 – “EARLYhumanIMPACT”. This is EARLYhumanIMPACT contribution 14. Publisher Copyright: © 2015 The Authors.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - Vegetation changes in the Maya Lowlands during the Holocene are a result of changing climate conditions, solely anthropogenic activities, or interactions of both factors. As a consequence, it is difficult to assess how tropical ecosystems will cope with projected changes in precipitation and land-use intensification over the next decades. We investigated the role of fire during the Holocene by combining macroscopic charcoal and the molecular fire proxies levoglucosan, mannosan and galactosan. Combining these two different fire proxies allows a more robust understanding of the complex history of fire regimes at different spatial scales during the Holocene. In order to infer changes in past biomass burning, we analysed a lake sediment core from Lake Petén Itzá, Guatemala, and compared our results with millennial-scale vegetation and climate change available in the area. We detected three periods of high fire activity during the Holocene: 9500–6000 cal yr BP, 3700 cal yr BP and 2700 cal yr BP. We attribute the first maximum mostly to climate conditions and the last maximum to human activities. The rapid change between burned vegetation types at the 3700 cal yr BP fire maximum may result from human activity.

AB - Vegetation changes in the Maya Lowlands during the Holocene are a result of changing climate conditions, solely anthropogenic activities, or interactions of both factors. As a consequence, it is difficult to assess how tropical ecosystems will cope with projected changes in precipitation and land-use intensification over the next decades. We investigated the role of fire during the Holocene by combining macroscopic charcoal and the molecular fire proxies levoglucosan, mannosan and galactosan. Combining these two different fire proxies allows a more robust understanding of the complex history of fire regimes at different spatial scales during the Holocene. In order to infer changes in past biomass burning, we analysed a lake sediment core from Lake Petén Itzá, Guatemala, and compared our results with millennial-scale vegetation and climate change available in the area. We detected three periods of high fire activity during the Holocene: 9500–6000 cal yr BP, 3700 cal yr BP and 2700 cal yr BP. We attribute the first maximum mostly to climate conditions and the last maximum to human activities. The rapid change between burned vegetation types at the 3700 cal yr BP fire maximum may result from human activity.

KW - Chemistry

KW - Biomass burning

KW - Sedimentary charcoal

KW - Sustainability Science

KW - Human activities

KW - Levoglucosan

UR - http://www.scopus.com/inward/record.url?scp=84926327547&partnerID=8YFLogxK

U2 - 10.1016/j.quascirev.2015.03.004

DO - 10.1016/j.quascirev.2015.03.004

M3 - Journal articles

VL - 115

SP - 123

EP - 131

JO - Quaternary Science Reviews

JF - Quaternary Science Reviews

SN - 0277-3791

ER -