By J. V. Ward, Boris C. Kondratieff, R. E. Zuellig
It is a complete source at the biology, ecology, and systematics of aquatic bugs of Rocky Mountain streams. This richly illustrated and up to date quantity contains descriptions of mountain movement ecosystems and habitats; simplified id keys to the bugs of Colorado Mountain streams; transparent, well-labelled drawings; and an intensive bibliography. Species' distributions via drainage basin are supplied for mayflies, stoneflies and caddisflies, the 3 orders for which such info can be found.
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Additional info for An illustrated guide to the mountain stream insects of Colorado
Many of the benthic species occurring in potamal reaches exhibit no special adaptations for running waters and Page 13 may also inhabit suitable standing water bodies. Most of the major rivers in Colorado have potamal characteristics in their lower reaches. The River Continuum Concept (Vannote et al. 1980) hypothesizes that aquatic invertebrates are predictably structured along resource gradients over the longitudinal stream profile. This concept emphasizes downstream shifts in the relative importance of functional feeding groups as the composition of food resources changes along the river continuum.
For example, living aquatic angiosperms tend not to be eaten and their relative abundance in lotic habitats will not be reflected in gut analyses. Food habits of stream insects tend to be based more on feeding mechanisms (functional feeding groups) than selection of specific food types (Cummins 1973). Table 4 shows the categories of food resources available in lotic ecosystems and the macroinvertebrate functional feeding groups utilizing each resource. See Merritt and Cummins (1984) for a tabular summary of the known feeding mechanism of North American genera of aquatic insects.
1986) Gray et al. (1983)Lower ReachesRiver7-12PotamalLarge RiversPeters and Edmunds (1961) Gaufin and Jensen (1961) Argyle and Edmunds (1962) Knight and Gaufin (1966) Ames (1977) Ward et al. (1986) Page 9 Fig. 6. A springbrook near Fairplay, Colorado. Several beaver ponds are seen in the middle of the photograph. South Park can be seen in the distance (photo by J. V. Ward). Fig. 7. The middle reaches of the Fryingpan River upstream from Ruedi Reservoir, Colorado (photo by J. V. Ward). Page 10 Fig.