New PDF release: An illustrated guide to the mountain stream insects of

By J. V. Ward, Boris C. Kondratieff, R. E. Zuellig

ISBN-10: 0870812602

ISBN-13: 9780870812606

This can be a accomplished 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 flow ecosystems and habitats; simplified id keys to the bugs of Colorado Mountain streams; transparent, well-labelled drawings; and an intensive bibliography. Species' distributions by way of drainage basin are supplied for mayflies, stoneflies and caddisflies, the 3 orders for which such information can be found.

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Additional info for An illustrated guide to the mountain stream insects of Colorado

Sample text

The flowing water (Wallace and Merritt 1980). Collector-gatherers are deposit feeders adapted to utilize sedimentary organic matter. Predators are adapted for capturing and consuming other animals, which are normally consumed whole or in large pieces. A few predators, however, are adapted for piercing their prey and sucking out the body fluids. Specific examples of these feeding mechanisms are presented in the next section. Several studies have dealt with food habits of insects in Colorado mountain streams (Richardson and Gaufin 1971; Mecom 1972b; Fuller and Stewart 1977, 1979; Gray and Ward 1979; Short et al.

The Subalpine Zone is dominated by the spruce-fir forest (Picea engelmannii-Abies lasiocarpa), which occurs from 10,000 ft. (3,048 m) to timberline. In the Montane Zone, from 8,000-10,000 ft. (2,438-3,048 m), Douglas fir (Pseudotsuga menziesii) predominates on north slopes and ponderosa pine (Pinus ponderosa) occur in more xeric locations. Large stands of aspen (Populus tremuloides) and lodgepole pine (Pinus contorta) also characterize this zone. The Foothills Zone from 6,000-8,000 ft. (1,829-2,438 m) is typified by steep slopes and deep canyons.

Whereas intolerant organisms do not occur under severe conditions, tolerant organisms may also inhabit pristine waters. , heavy metals, pH levels, organic pollution, water temperature) because a species may be included in all three categories (intolerant, facultative, tolerant), depending upon which variable is examined. Knowing that an organism is, for example, intolerant of organic pollution does not indicate whether it is low oxygen, high turbidity, sedimentation, or a combination of these and other factors that are responsible for its absence.

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An illustrated guide to the mountain stream insects of Colorado by J. V. Ward, Boris C. Kondratieff, R. E. Zuellig


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