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Volume 33 Issue 2
Jun.  2014
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Article Navigation >  CARSOLOGICA SINICA  > 2014  >  33(2): 129-136
WANG Liang-chi, ZHANG Qiang, XIAO Liang-jian, HU Zhi-an, LI Hong-chun, XIE Yun-qiu. Paleoenvironmental changes inferred from diatom and geochemistry records of lake deposits: A case study in Huixian karst wetland, Guilin[J]. CARSOLOGICA SINICA, 2014, 33(2): 129-136.
Citation: WANG Liang-chi, ZHANG Qiang, XIAO Liang-jian, HU Zhi-an, LI Hong-chun, XIE Yun-qiu. Paleoenvironmental changes inferred from diatom and geochemistry records of lake deposits: A case study in Huixian karst wetland, Guilin[J]. CARSOLOGICA SINICA, 2014, 33(2): 129-136.
shu

Paleoenvironmental changes inferred from diatom and geochemistry records of lake deposits: A case study in Huixian karst wetland, Guilin

  • 1.

    Institute of Karst Geology, CAGS / Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, MLR；Albrecht-von-Haller Institute for Plant Sciences, University of G?ttingen

  • 2.

    Institute of Karst Geology, CAGS/Karst Dynamics Laboratory, MLR & GZAR / International Research Center on Karst under the Auspices of UNESCO

  • 3.

    Institute of Earth Sciences, Academia Sinica

  • 4.

    Department of Geosciences, National Taiwan University

  • 5.

    Institute of Karst Geology, CAGS / Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, MLR

  • Received Date: 2014-02-28
  • Publish Date: 2014-06-25
    Abstract
  • The Holocene paleolimnological variations in Huixian karst wetland, Guilin, and the climate changes as well as human activities that they reflect, have been reconstructed using multiproxies, including radioactive dating, geochemical proxy, and diatom analysis of a sediment core from Shizitan Lake. During 6 400-5 200 cal BP, high percentages of planktonic diatoms indicated higher water levels, corresponding to a warm and humid climate during the Holocene Optimum. During 5 200-2 700 cal BP, the decline of weak acid leachable Ca, Mg, Sr, and the increase of Mg/Ca, Sr/Ca ratios, associated with low percentages of planktonic diatoms inferred a marked decline in water levels and drier climate. The re-accumulation of lake sediments in A.D. 1943 may correlate to significant population shifts during World War 2. The numerous deposits of diatom valves since A.D. 1973, showed algal blooms as a consequence of intense human impacts.

     

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