Original paper

The invertebrate fauna of summer-dry streams in western Oregon

Dieterich, Martin; Anderson, N. H.

Archiv für Hydrobiologie - Hauptbände Volume 147 Number 3 (2000), p. 273 - 295

36 references

published: Feb 3, 2000

DOI: 10.1127/archiv-hydrobiol/147/2000/273

BibTeX file

ArtNo. ESP141014703002, Price: 29.00 €

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In this paper we report on invertebrate communities and habitat associations of species in summer-dry streams of western Oregon. Overall, we recorded 202 aquatic and semi-aquatic species, including at least 13 previously undescribed taxa. Species richness in temporary forest streams (≤125 species) exceeded that in a permanent headwater (100 species). Richness in ephemeral streams was 35 species or less. Duration of flow, exposure (shaded or open), riffle-pool structure and summerdrought conditions were key factors shaping community composition between and within stream types. We conclude that the potential of summer-dry streams with respect to habitat function is still widely underestimated. Such systems need more attention both from limnologists and landscape ecologists.


Oregonsummer-dry streams