Download or read book Caddisflies written by Glenn B. Wiggins and published by University of Toronto Press. This book was released on 2005-12-15 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Caddisflies constitute the insect order Trichoptera in which some 10,000 species are known in the world, including about 1400 in North America. Fossil evidence shows that caddisflies originated in the Triassic period, 200-250 million years ago. They are important links in the movement of energy and nutrients through freshwater ecosystems due largely to the extraordinary diversification in their larval architecture, which includes portable and stationary shelters, silken filter nets, and osmotically semipermeable cocoons. Glenn Wiggins's Caddisflies is the foremost comprehensive reference source about these insects and is concerned with behavioural ecology, evolutionary history, biogeography, and biological diversity. Wiggins outlines fundamental concepts of aquatic ecology, illuminating the ways in which caddisflies help to make fresh waters work. Essential features of morphology, biology, and distribution are outlined for the twenty-six North American families of caddisflies and illustrated diagnostic keys are provided for larvae, pupae, and adults. The author also brings together information on caddisflies from widely scattered sources and provides comprehensive coverage of the scientific literature.

Download or read book General Technical Report RMRS written by and published by . This book was released on 1998 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monitoring Wilderness Stream Ecosystems written by and published by . This book was released on 2001 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: A protocol and methods for monitoring the major physical, chemical, and biological components of stream ecosystems are presented. The monitoring protocol is organized into four stages. At stage 1 information is obtained on a basic set of parameters that describe stream ecosystems. Each following stage builds upon stage 1 by increasing the number of parameters and the detail and frequency of the measurements. Stage 4 supplements analyses of stream biotic structure with measurements of stream function: carbon and nutrient processes. Standard methods are presented that were selected or modified through extensive field application for use in remote settings.

Download or read book General Technical Report SRS written by and published by . This book was released on 1999 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Ozark Ouachita Highlands Assessment written by and published by . This book was released on 1999 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Genera of the Trichoptera of Canada and Adjoining Or Adjacent United States written by F. Schmid and published by NRC Research Press. This book was released on 1998 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: This reference volume explores the adult stage of the order of Trichoptera found in Canada and some of the United States. The author has adopted a tradionalist and conservative attitude to the study and has not accepted the existence of families based on larval characters only."

Download or read book Caddis Larvae written by Norman E. Hickin and published by Fairleigh Dickinson Univ Press. This book was released on 1967 with total page 500 pages. Available in PDF, EPUB and Kindle. Book excerpt: An intensive biological study of the larval stage of caddis flies. Deals specifically with British flies but also includes a section that refers to American literature on the subject. Includes over 100 descriptions of caddis larvae.

Download or read book Identification Guide of Freshwater Macroinvertebrates of Spain written by Javier Oscoz and published by Springer Science & Business Media. This book was released on 2011-06-27 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: As a result of the European Commission’s concern for the status of continental waters, and as a clear reflection of the notion of water as heritage to be conserved, in the year 2000 the Water Framework Directive (2000/60/CE) was enacted, its goal being to establish a framework to protect water and the different aquatic ecosystems by requiring the Member States to achieve a good ecological status in all their waters by 2015. Like all ecosystems, freshwater ecosystems undergo physical, chemical and energy-related changes, both of natural and anthropogenic origin. These disturbances affect the organisms living in them and those who utilize their resources. Therefore, evaluating these changes has become a very important task in order to better understand aquatic systems. The study and analysis of the ecological status of these ecosystems in relation to their conservation status and water quality is thus a fundamental tool for a more efficient and rational management of their resources, that is, a management that does not threaten the ecosystem. The present guide for the identification of Spanish freshwater macroinvertebrates aims to facilitate the job of those who go to great lengths to identify them in order to then determine biotic indices. It is not the aim of this book to serve as a zoological treaty, nor does it claim to add new information on the biology or the ecology of the taxa covered. This book is, simply, a working tool explicitly designed to facilitate the identification of the Spanish macroinvertebrates and the subsequent computing of biotic indices.

Download or read book Bibliographia Trichopterorum 1961 1970 written by Andrew P. Nimmo and published by Pensoft Publishers. This book was released on 1996 with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Introduction to the Aquatic Insects of North America written by Richard W. Merritt and published by Kendall Hunt. This book was released on 1996 with total page 894 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Introduction to the Aquatic Insects of North America Text written by Richard W. Merritt and published by . This book was released on 2008 with total page 1244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Amphibiotic Insects of the Northeast of Asia written by I. A. Zasypkina and published by Pensoft Publishers. This book was released on 2001 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Benthic Invertebrate Communities and Their Responses to Selected Environmental Factors in the Kanawha River Basin West Virginia Virginia and North Carolina written by Douglas B. Chambers and published by . This book was released on 2001 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Zeitschrift f r allgemeine und angewandte Entomologie written by and published by . This book was released on 1983 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the 8th International Symposium on Trichoptera Minneapolis and Lake Itasca Minnesota 9 15 July 1995 written by Ralph W. Holzenthal and published by . This book was released on 1997 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Lake Tahoe Watershed Assessment Appendixes written by and published by . This book was released on 2000 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Larvae of the North American Caddisfly Genera Trichoptera written by Glenn B. Wiggins and published by University of Toronto Press. This book was released on 1996-12-15 with total page 501 pages. Available in PDF, EPUB and Kindle. Book excerpt: Caddisflies are one of the most diverse groups of organisms living in freshwater habitats, and their larvae are involved in energy transfer at several levels within these communities. Caddisfly larvae are also remarkable because of the exquisite food-catching nets and portable cases they construct with silk and selected pieces of plant and rock materials. This book is the most comprehensive existing reference on the aquatic larval stages of the 149 Nearctic genera of Trichoptera, comprising more than 1400 species in North America. The book is invaluable for freshwater biologists and ecologists in identifying caddisfly in the communities they study, for students of aquatic biology as a guide to the diverse fauna of freshwater habitats, and for systematic entomologists as an atlas of the larval morphology of Trichoptera. In the General Section, the biology of caddisfly larvae is considered from an evolutionary point of view. Morphological terms are discussed and illustrated and a classification of the Nearctic genera is given. Techniques are outlined for collecting and preserving larval specimens and for associating larval with adult stages. The Systematic Section begins with a key to larvae of the 26 families of North American Trichoptera. Each chapter in this section is devoted to a particular family, providing a summary of biological features and a key to genera, followed by a two-page outline for each genus with illustrations facing text. This outline provides information on general distribution, number of species, distinctive morphological features, and biological data including construction behaviour. An important feature of the book is the habit illustrations of larvae and cases of a selected species in each genus, along with illustrations of details of significant morphological structures. Each generic type is thus presented as a recognizable whole organism adapted in elegant ways to particular niches of freshwater communities. This revised edition includes advances in knowledge on the classification and biology of Trichoptera up to 1993 - an interval of 17 years since the first edition. An additional eight families and thirteen genera are included for the first time. Through reorganization of the families into three suborders, a biological context has been established for the systematic section.