Read e-book online An illustrated guide to the mountain stream insects of PDF

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 updated quantity comprises 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 facts can be found.

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

Sample text

This position not only reduces their chances of being swept away but also means that locomotion tends to be primarily in the upstream direction. In addition, the adults of many Page 31 stream insects exhibit a propensity to fly in the upstream direction, thus further compensating for the downstream displacement of aquatic stages by the current (Müller 1982). The negative phototaxis of many lotic insects results in current avoidance through cryptic behavior during the day. During the hours of darkness, aquatic insects may leave the substrate interstices and become more exposed to the current, which in part explains the night peaks in drift (downstream displacement of organisms by current) exhibited by the majority of species.

Temperatures up to 84°C have been recorded. Most of these springs are small: The largest thermal springs discharge less than 200 liters of water per second. Some of the hot springs have been developed for commercial purposes. At temperatures from 35-39°C the fauna consists of a few species each from a few groups that generally occur in hot springs worldwide (Winterbourn 1968). This warm-water fauna comprises primarily eurythermal forms living close to their upper temperature limits. Insect inhabitants include members of several families of true flies (Diptera), damselflies (Odonata), water boatmen and back swimmers (Hemiptera), and dytiscid beetles (Coleoptera).

W. Pennak, W. D. Fronk, and R. E. Stevens for reviewing an early draft of the manuscript; Dr. H. E. Evans for reviewing the penultimate draft; D. Hosket-Lundgren for a detailed examination of the literature; E. Bergey, S. Canton, L. Cline, J. Harvey, R. Martinson, D. Ruiter, D. Winters, H. Zimmermann, and Richard Durfee for providing records or identifying specimens; and J. Bodenham, A. Dixon, L. Dunker, R. Hite, P. Jones, M. Kippenhan, T. Sechrist, and J. Stansen for the illustrations. Financial support was provided by a grant from the USDA Forest Service, Rocky Mountain Forest and Range Experiment Station.

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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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