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Substrate size selection by stream invertebrates and the influence of sand
Author(s) -
Williams D. Dudley,
Mundie J. H.
Publication year - 1978
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1978.23.5.1030
Subject(s) - benthic zone , invertebrate , substrate (aquarium) , biomass (ecology) , environmental science , particle size , ecology , geology , biology , paleontology
A field experiment showed that benthic invertebrates in running water exhibit preferences for different substrate particle sizes. Maximum numbers and biomass occurred on medium gravel (24.2‐mm mean diam), whereas diversity was greatest on large gravel (40.8 mm). Individual species fell into four groups: upper, medium, and lower size preference, and no preference. The addition of a limited quantity of sand to medium gravel affected only a few species.