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Understanding fossil phytolith preservation: the role of partial dissolution in paleoecology and archaeology

Cabanes, Dan ; Shahack-Gross, Ruth Hardy, Karen

PloS one, 2015-05, Vol.10 (5), p.e0125532-e0125532 [Periódico revisado por pares]

United States: Public Library of Science

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  • Título:
    Understanding fossil phytolith preservation: the role of partial dissolution in paleoecology and archaeology
  • Autor: Cabanes, Dan ; Shahack-Gross, Ruth
  • Hardy, Karen
  • Assuntos: Archaeological sites ; Archaeology ; Archaeology - methods ; Arqueologia ; Dissolution ; Fitòlits ; Flowers & plants ; Fossils ; Grasses ; Historic buildings & sites ; Historic sites ; Microfossils ; Microorganisms ; Morphology ; Paleoecologia ; Paleoecology ; Phytoliths ; Plants - chemistry ; Preservation ; Preservation, Biological - methods ; Silicon ; Solubility ; Surface area
  • É parte de: PloS one, 2015-05, Vol.10 (5), p.e0125532-e0125532
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    Conceived and designed the experiments: DC RS-G. Performed the experiments: DC RS-G. Analyzed the data: DC RS-G. Contributed reagents/materials/analysis tools: DC RS-G. Wrote the paper: DC RS-G. Prepared the phytolith assemblages from modern plants and from Tell es-Safi/Gath, and conducted morphotype analyses including measurements and calculation of surface to bulk ratios: DC. Prepared the phytolith assemblages from Aşıklı Höyük and carried out the dissolution experiments: RS-G.
    Competing Interests: The authors have declared that no competing interests exist.
  • Descrição: Opaline phytoliths are important microfossils used for paleoecological and archaeological reconstructions that are primarily based on relative ratios of specific morphotypes. Recent studies have shown that phytolith assemblages are prone to post-depositional alteration involving partial dissolution, however, the manner in which partial dissolution affects morphotype composition is poorly understood. Here we show that morphotype assemblages from four different plant species subjected to controlled partial dissolution are significantly different from the original assemblages, indicating that the stability of various morphotypes differs, mainly depending on their surface area to bulk ratios. This underlying mechanism produces distorted morphotype compositions in partially dissolved phytolith assemblages, bearing vast implications for morphotype-based paleoecological and archaeological interpretation. Together with analyses of phytolith assemblages from a variety of archaeological sites, our results establish criteria by which well-preserved phytolith assemblages can be selected for accurate paleoecological and archaeological reconstructions.
  • Editor: United States: Public Library of Science
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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