Journal of Paleolimnology

, Volume 24, Issue 1, pp 43–54

Cladoceran and chironomid assemblages as qualitative indicators of water depth in subarctic Fennoscandian lakes

  • Atte Korhola
  • Heikki Olander
  • Tom Blom
Article

DOI: 10.1023/A:1008165732542

Cite this article as:
Korhola, A., Olander, H. & Blom, T. Journal of Paleolimnology (2000) 24: 43. doi:10.1023/A:1008165732542

Abstract

The relationship between surface-sediment cladoceran and chironomid communities to lake depth was analysed in 53 lakes distributed across timberline in northern Fennoscandia using multivariate statistical approaches. The study sites are small and bathymerically simple, with water depth ranging from 0.85-27.0 m (mean 6.36 m). Maximum lake depth was the most important factor in explaining the cladoceran distributions and the second most important factor in explaining the chironomid distributions in these subarctic lakes, as assessed on the basis of a series of constrained RDAs, Monte Carlo permutation tests, and variance partitioning. Quantitative inference models for maximum lake depth were created for both groups of animals. Well-performing calibration functions for predicting lake depth were obtained in each case using linear partial least squares (PLS) regression and calibration, weighted averaging (WA) with an 'inverse' deshrinking regression, and weighted averaging partial least squares (WA-PLS). Quantitative reconstructions of lake level fluctuations should be possible from cladoceran and chironomid core data with a root mean squared error of prediction (RMSEP), as estimated by jack-knifing, of about 1.6-3.0 m.

cladocerans chironomids palaeohydrological proxies lake levels calibration models subarctic lakes northern Fennoscandia 

Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Atte Korhola
    • 1
  • Heikki Olander
    • 2
  • Tom Blom
    • 2
  1. 1.The Academy of Finland, Laboratory of Physical GeographyUniversity of HelsinkiHelsinkiFinland
  2. 2.Laboratory of Physical GeographyUniversity of HelsinkiHelsinkiFinland

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