Fundamentals of fish ecological integrity and their relation to the extended serial discontinuity concept

  • Jungwirth M
  • Muhar S
  • Schmutz S
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Abstract

Using the distribution patterns of benthic insects (198 species) and fishes ( 29 species) from 11 tributaries and the main channel of the Doubs River drainage basin (French Jura), the authors have tried to establish whether there is an organization of species into discrete, identifiable communities. Principal Component Analysis (PCA) was used to identify whether a continuum existed, and also used to select 50 least-disturbed sites, which were used to define a theoretical watercourse. The density classes of each species were projected on this longitudinal gradient and each species response was characterised by two typological traits: its typological preferendum (tp) and its typological amplitude (ta), thus creating a synthesis of ecological characteristics. In the typological index given in the appendix, the 210 species which form a biological templet are listed in alphabetical order with their tp and ta values. These typological species traits are useful contributions to a database for running waters biomonitoring

Author-supplied keywords

  • connectivity
  • ecological integrity
  • extended serial discontinuity concept
  • fish ecology
  • running waters

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Authors

  • M. Jungwirth

  • S. Muhar

  • S. Schmutz

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