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Marine Biology

, Volume 137, Issue 3, pp 559–565 | Cite as

Biodiversity in Littorina species (Mollusca: Gastropoda): a physiological approach using heat-coma

  • A. P. Clarke
  • P. J. Mill
  • J. Grahame

Abstract

 The upper critical thermal limits were measured as heat-coma temperatures in Littorina species as a tool for examining physiological diversity. Thermal tolerance was found to be stable within a population, but extensive variation occurred between populations and species. All species examined displayed heat-coma values of ∼30 °C and did not show a positive correlation with shore height. Eulittoral-fringe species tended to have higher coma temperatures than eulittoral species. Coma temperatures varied both seasonally and geographically. Lethal thermal limits were also investigated; these were ∼10 C° higher than coma temperatures.

Keywords

Mollusca Physiological Diversity Thermal Tolerance Extensive Variation Gastropoda 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2000

Authors and Affiliations

  • A. P. Clarke
    • 1
  • P. J. Mill
    • 1
  • J. Grahame
    • 1
  1. 1.School of Biology, University of Leeds, Leeds LS2 9JT, Yorkshire, England Fax: 0044 (0)113 216 2401 e-mail: aclarke@mail.parklanecoll.ac.ukGB

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