Hydrobiologia

, Volume 263, Issue 3, pp 163–172

Relationship between current velocity, depth and the invertebrate community in a stable river system

  • G. Degani
  • G. N. Herbst
  • R. Ortal
  • H. J. Bromley
  • D. Levanon
  • Y. Netzer
  • N. Harari
  • H. Glazman
Article

Abstract

The relationship between invertebrate densities, current velocity and water depth was studied in the Dan River, northern Israel. Maximum current preferences ranged from 5–120 cm sec−1, and depth preferences ranged from 5–60 cm. Thirty-five taxa of invertebrates were collected by means of colonization cages. Larval and adult stages of 3 Elmidae (Coleoptera) species were treated separately: Limnius letourneuxi, Grouvellinus caucasicus and Elmis rioloides. Differences in current preference were observed between larval and adult stages of the same species of Elmidae. Taxa were also grouped according to preference for turbulence. Wide ranges of depth and current velocity preferences were observed. Most of the taxa were found at between 80–100 cm sec−1 and at depths of less than 30 cm. A correlation between species diversity and current velocity was established. Velocities of 60–80 cm sec−1 contained the greatest overlap of faunal preference. The sensitivity of selected species to stream flow reduction is discussed.

Key words

Invertebrates current velocity depth preference turbulence 

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Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • G. Degani
    • 1
  • G. N. Herbst
  • R. Ortal
  • H. J. Bromley
  • D. Levanon
    • 2
  • Y. Netzer
  • N. Harari
  • H. Glazman
  1. 1.Golan Research Institute, Haifa UniversityKatzrinIsrael
  2. 2.MIGAL LaboratoryKiryat ShmonaIsrael

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