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Impact of pre-Columbian “geoglyph” builders on Amazonian forests

Watling, Jennifer ; Iriarte, José ; Mayle, Francis E. ; Schaan, Denise ; Pessenda, Luiz C. R. ; Loader, Neil J. ; Street-Perrott, F. Alayne ; Dickau, Ruth E. ; Damasceno, Antonia ; Ranzi, Alceu

Proceedings of the National Academy of Sciences - PNAS, 2017-02, Vol.114 (8), p.1868-1873 [Periódico revisado por pares]

United States: National Academy of Sciences

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  • Título:
    Impact of pre-Columbian “geoglyph” builders on Amazonian forests
  • Autor: Watling, Jennifer ; Iriarte, José ; Mayle, Francis E. ; Schaan, Denise ; Pessenda, Luiz C. R. ; Loader, Neil J. ; Street-Perrott, F. Alayne ; Dickau, Ruth E. ; Damasceno, Antonia ; Ranzi, Alceu
  • Assuntos: Archaeology ; Brazil ; Conservation of Natural Resources ; Deforestation ; Ecosystem studies ; Environmental impact ; Forest products ; Human influences ; Humans ; Rainforest ; Rainforests ; Social Sciences
  • É parte de: Proceedings of the National Academy of Sciences - PNAS, 2017-02, Vol.114 (8), p.1868-1873
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    Edited by James O'Connell, University of Utah, Salt Lake City, UT, and approved December 28, 2016 (received for review August 27, 2016)
    Author contributions: J.W., J.I., F.E.M., D.S., and A.R. designed research; J.W., L.C.R.P., N.J.L., F.A.S.-P., and R.E.D. performed research; J.W., J.I., F.E.M., L.C.R.P., N.J.L., F.A.S.-P., R.E.D., and A.D. analyzed data; and J.W., J.I., F.E.M., D.S., L.C.R.P., N.J.L., and F.A.S.-P. wrote the paper.
  • Descrição: Over 450 pre-Columbian (pre-AD 1492) geometric ditched enclosures (“geoglyphs”) occupy ∼13,000 km² of Acre state, Brazil, representing a key discovery of Amazonian archaeology. These huge earthworks were concealed for centuries under terra firme (upland interfluvial) rainforest, directly challenging the “pristine” status of this ecosystem and its perceived vulnerability to human impacts. We reconstruct the environmental context of geoglyph construction and the nature, extent, and legacy of associated human impacts. We show that bamboo forest dominated the region for ≥6,000 y and that only small, temporary clearings were made to build the geoglyphs; however, construction occurred within anthropogenic forest that had been actively managed for millennia. In the absence of widespread deforestation, exploitation of forest products shaped a largely forested landscape that survived intact until the late 20th century.
  • Editor: United States: National Academy of Sciences
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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