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Journal of Paleolimnology

, Volume 26, Issue 3, pp 283–292 | Cite as

Lacustrine organic matter and the Holocene paleoenvironmental record of Lake Albano (central Italy)

  • D. Ariztegui
  • C. Chondrogianni
  • A. Lami
  • P. Guilizzoni
  • E. Lafargue
Article

Abstract

A combined bulk and detailed geochemical study of the sedimentary organic matter in Lake Albano, central Italy, provides critical data to track the response of this aquatic system to the environmental changes of variable amplitude that occurred during the Holocene. Rock‐Eval pyrolysis of this predominantly laminated, organic carbon‐rich sedimentary sequence shows changes in hydrogen and oxygen indices that are related to variations in the dominance of the primary producers. These variations are further confirmed by the pigments and the carbon isotopic composition of bulk organic matter showing that cyanobacteria dominated the lake waters during the early and late Holocene whereas diatoms have been the main producers during the middle Holocene. Sharp decreases in productivity, 2–3 centuries long, are identified at ca. 8.2, 6.4 and 3.8 ka. B.P. Changes in temperature and/or effective moisture are suggested as the most probable causes, although human impact cannot be ruled out for the latest part of the Holocene.

Holocene Rock‐Eval Pyrolysis pigments trophic‐state paleolimnology organic carbon 

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Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • D. Ariztegui
    • 1
  • C. Chondrogianni
    • 1
  • A. Lami
    • 2
  • P. Guilizzoni
    • 2
  • E. Lafargue
    • 3
  1. 1.Geologisches Institut, ETH ZentrumZürichSwitzerland
  2. 2.Institut ForelUniversity of GenevaGenevaSwitzerland
  3. 3.Institut Français du PétrolRueil-MailmaisonFrance

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