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Title

Palaeofires in Amazon: Interplay between land use change and palaeoclimatic events

Publication Year

2014

Author(s)
  • Cordeiro, Renato Campello
  • Turcq, Bruno
  • Moreira, Luciane Silva
  • Ribeiro Rodrigues, Renato de Aragao
  • Lamego Simbes Filho, Francisco Fernando
  • Martins, Gabriel Souza
  • Santos, Alice Bosco
  • Barbosa, Marcelo
  • Guilles da Conceicao, Marcela Cardoso
  • Rodrigues, Rodrigo de Carvalho
  • Evangelista, Heitor
  • Moreira-Turcq, Patricia
  • Penido, Yvaga Poty
  • Sifeddine, Abdelfettah
  • Sicoli Seoane, Jose Carlos
Source
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY Volume: 415 Pages: 137-151 Published: 2014
ISSN
0031-0182 eISSN: 1872-616X
Abstract

Interpreting the geological record of Amazon biomass combustion requires comparing charcoal accumulation rates in various biomes at different time scales. Charcoal accumulation rates, a proxy for palaeofire records, were obtained in sediment cores from Amazon lakes surrounded by several vegetation types and from a reservoirs in an intense land use change region. The records presented in this study were obtained in the following areas i) a reservoirs in Alta Floresta region (northern Mato Grosso State); ii) Lago do Saci (southern Pars State), a lake close to Alta Floresta and located at the southern border of Para State; iii) a bog in an ecotone area in the Humaita region (southern Amazonas State); iv) lakes in lateritic iron crust of the Carajas Hills (southeastern Para State); v) Lago Comprido, a floodplain lake close to the Amazon River and surrounded by tropical rain forest (Monte Alegre, Para State; vi) Lagoa da Pata in the Morro dos Seis Lagos alkaline complex (Sao Gabriel da Cachoeira, Amazonas State) and vii) Lago Caracarana, a secluded lake in the northern Amazon cerrado (Roraima State). The highest charcoal accumulation rates were observed for modern records related to an intense change in land use at Alta Floresta, which had no precedent during the Holocene history of the Amazon. High charcoal accumulation rates that were observed in the Carajas region during low lake level phases in the Amazon in the mid-Holocene were comparable to those at the onset of the human settlement in Alta Floresta region. An increase in charcoal accumulation rate was observed in the late Holocene when the lake level was high, suggesting an interaction between climates and human presence. Low charcoal accumulation rates are typical of modern high rainfall environments, as observed in Lagoa da Pata where the environment is not susceptible to occurrences of wildfires even during relatively drier climatic phases. Low charcoal accumulation rates also exist in the relatively dry cerrado (savanna type) biome even during relatively dry phases in the Caracarana region where the savanna-type vegetation biomass is lower and thus generates less charcoal particles than forest ecosystems. (C) 2014 Elsevier B.V. All rights reserved.

Author Keyword(s)
  • Amazon
  • Palaeofires
  • Charcoal
  • Climatic changes
  • Human impacts
KeyWord(s) Plus
  • LAST GLACIAL MAXIMUM
  • HOLOCENE ENVIRONMENTAL-CHANGES
  • TERRESTRIAL CARBON STORAGE
  • RAIN-FOREST FIRES
  • PALEOECOLOGICAL RECORD
  • SOUTHEASTERN AMAZONIA
  • ORGANIC GEOCHEMISTRY
  • DROUGHT SENSITIVITY
  • MERCURY DEPOSITION
  • EUROPEAN CONQUEST
ESI Discipline(s)
  • Environment/Ecology
  • Geosciences
Web of Science Category(ies)
  • Geography, Physical
  • Geosciences, Multidisciplinary
  • Paleontology
Adress(es)

[Cordeiro, Renato Campello; Moreira, Luciane Silva; Ribeiro Rodrigues, Renato de Aragao; Martins, Gabriel Souza; Santos, Alice Bosco; Guilles da Conceicao, Marcela Cardoso; Rodrigues, Rodrigo de Carvalho; Penido, Yvaga Poty; Sifeddine, Abdelfettah; Sicoli Seoane, Jose Carlos] Univ Fed Fluminense, Inst Quim, Programa Geoquim, Niteroi, RJ, Brazil; [Turcq, Bruno] IRD CNRS UPMC MNHN, Inst Pierre Simon, IRD LOCEIN, Bondy, France; [Ribeiro Rodrigues, Renato de Aragao] Embrapa Agrossilvipastoril, Empresa Brasileira Pesquisa Agr, BR-78550970 Sinop, MT, Brazil; [Lamego Simbes Filho, Francisco Fernando] Inst Nucl Engn, Rio De Janeiro, RJ, Brazil; [Sicoli Seoane, Jose Carlos] Univ Fed Rio de Janeiro, Dept Geol, BR-21941916 Rio De Janeiro, RJ, Brazil; [Evangelista, Heitor] Univ Estado Rio de Janeiro, LARAMG Lab Radioecol & Mudancas Globais, DBB IBRAG, BR-20550013 Rio De Janeiro, RJ, Brazil; [Moreira-Turcq, Patricia] IRD GET, Lima, Peru

Reprint Adress

Cordeiro, RC (reprint author), Univ Fed Fluminense, Inst Quim, Programa Geoquim, 5 Andar, Niteroi, RJ, Brazil.

Country(ies)
  • Brazil
  • France
  • Peru
CNRS - Adress(es)
  • Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), UMR7159
Accession Number
WOS:000345951000015
uid:/VV7S5864
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