Read e-book online Streams. Their Ecology and Life PDF

By Colbert E. Cushing, J. David Allan

ISBN-10: 0120503409

ISBN-13: 9780120503407

  • ''Cushing and Allen have written an enticing and easy-to-read booklet that might attract the nonprofessional, yet heavily stream-lover for whom it truly is meant. extraordinary colour images of streams and organisms will please any naturalist. ...the publication combines the benefits of reference e-book and box advisor, and offers a nontrivial account of environment functionality in streams and rivers. ...All in all, a great ebook that J-NABS readers can expectantly suggest to others, specifically nonprofessionals''
    —Rosemary J. Mackay for magazine OF THE NORTH AMERICAN BENTHOLOGICAL SOCIETY (2002)

    ''This publication is especially good equipped. it's a finished quantity that covers all of the fundamentals of move ecology and might function an invaluable reference for either specialist and lay audiences. ...This is the simplest on hand street map in the course of the medical complexities of a self-discipline that informs our knowing of environmental caliber.
    --Charles F. Gauvin, President and CEO, TROUT limitless (May 2001)

    ''This informative quantity is strictly what has lengthy been wanted - a ebook that tells us how rivers and their crucial existence structures paintings. each reader's figuring out of our watery lifelines might be superior via the excellent wisdom and knowledge that those superb scientists impart. Streams: Their Ecology and lifestyles turns into a useful gizmo for higher care of our waterways and a vital significant other to river enthusiasts.''
    --Tim Palmer, writer of ''Lifelines: The Case for River Conservation, the United States via Rivers'', and ''The middle of America''

    ''When the president of a neighborhood watershed defense workforce asks me what ebook to learn to profit approximately streams, i'm going to suggest this one. it's an attractive creation to the ecology of rivers and streams. The authors' enthusiasm for the topic is contagious.''
    --Judy Meyer, Director of technological know-how, River Basin technological know-how and coverage middle, college of Georgia

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Extra info for Streams. Their Ecology and Life

Sample text

Exudates . 1 The sources of energy in streams (autochthonous and allochthonous primary production; DOM), energy pathways (dashed arrow = autotrophic; solid arrow = heterotrophic; dash-dot arrow = chemotrophic), and feeding processes (herbivory, carnivory, detritivory, omnivory) within stream food webs. Coagulation and precipitation are the processes by which DOM is converted to POM, and decay is the mechanism by which aquatic plant material is converted to POM after death. t h a n it c o n s u m e s by respiration, it is a u t o t r o p h i c - - i t p r o d u c e s m o r e e n e r g y t h a n it uses.

Of course, no model is applicable to every situation, but the generalities of this model have been supported by considerable research. THE RIVER CONTINUUM CONCEPT:A MODEL As our model we will use a hypothetical stream ecosystem located in a deciduous forest, typical of those f o u n d in the eastern part of the United States. After we have described this model, we will discuss how it would change u n d e r differing geological, geographical, or other conditions. Since its formulation and first testing in the late 1970s, the RCC has since been refined, adjusted, and modified, but these details need not concern us here.

I ! Feeding Roles and Food Webs { i ~ - - . . ~ii Introduction Feeding Roles of Invertebrates Recommended Reading INTRODUCTION To live, grow, and reproduce, stream organisms must have sufficient food, in both quality and quantity. Moreover, food requirements change over the life cycle: the food requirements of an adult trout are quite different from those of newly hatched fry or of a small yearling. Adults consume larger invertebrates and small fish, while juveniles feed on tiny organisms such as midge larvae until they are larger enough to start taking larger food items.

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Streams. Their Ecology and Life by Colbert E. Cushing, J. David Allan

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