Taxonomy and Ecology of Stenonema Mayflies (Heptageniidae:Ephemeroptera) PDF Download
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Author: Philip A. Lewis
Publisher:
ISBN:
Category : Mayflies
Languages : en
Pages : 100
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Book Description
This manual provides keys and descriptions for all North American species of Stenonema mayflies and consolidates information from the literature on their ecology, environmental requirements, and pollution tolerance. Accounts of each species include synonymy, nymphal description, collection records, and a distribution map. The 31 species described and keyed include three new species, four new synonyms, two resurrected species, and new combinations involving three additional species and subspecies. Twelve species and one subspecies are classified as intolerant of organic pollution, eight species as tolerant of mild pollution, and seven species and two subspecies as tolerant to moderate pollution.
Author: Philip A. Lewis
Publisher:
ISBN:
Category : Mayflies
Languages : en
Pages : 100
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Book Description
This manual provides keys and descriptions for all North American species of Stenonema mayflies and consolidates information from the literature on their ecology, environmental requirements, and pollution tolerance. Accounts of each species include synonymy, nymphal description, collection records, and a distribution map. The 31 species described and keyed include three new species, four new synonyms, two resurrected species, and new combinations involving three additional species and subspecies. Twelve species and one subspecies are classified as intolerant of organic pollution, eight species as tolerant of mild pollution, and seven species and two subspecies as tolerant to moderate pollution.
Author: George F. Edmunds Jr.
Publisher: U of Minnesota Press
ISBN: 0816657564
Category : Nature
Languages : en
Pages : 342
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Book Description
The Mayflies of North and Central America was first published in 1976. Minnesota Archive Editions uses digital technology to make long-unavailable books once again accessible, and are published unaltered from the original University of Minnesota Press editions. Mayflies have fascinated man for centuries because of the brief span of their adult lives. These aquatic insects spend most of their lives as nymphs in water, then develop into winged stages and soon die, most species having an adult life of only two or three days. This brevity is implied in the very name of the order, Ephemeroptera. The mayflies are almost worldwide in distribution, being found everywhere except in Antarctica, the extreme Arctic, and many small oceanic islands. All by three of the twenty families in the world occur in North or Central America, the regions covered in this volume. The book provides a modern, useful, and well-illustrated key to the adults and nymphs. Data on habitats, behavior, and life history are given for each genus. Characteristics of nymphs and adults are given for families, subfamilies, and genera, with brief accounts for extralimital families. A discussion of methods of collecting and preserving specimens precedes the main portion of the text. The book is generously illustrated with drawings, photographs, and a map. The role of aquatic insects as indicators of water pollution has received increasing attention, and in this connection this book will be of special interest to those concerned with pollution problems. Mayflies, besides indicating the presence of pollutants, also help remove such substances from the waters, the authors explain. As a basic reference work, the book is essential for all biological science libraries. Many fly-fishermen are amateur students of mayflies, since the nymphs of larger species are used as bait. With the help of this volume the fisherman can acquire a greater knowledge of aquatic entomology and relate to his sport.
Author: Michael D. Hubbard
Publisher:
ISBN:
Category : Mayflies
Languages : en
Pages : 472
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 472
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Book Description
Author:
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 1922
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 116
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Book Description
Author:
Publisher:
ISBN:
Category : Ecological risk assessment
Languages : en
Pages : 682
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Book Description
Author: John F. Flannagan
Publisher: Springer Science & Business Media
ISBN: 1461330661
Category : Science
Languages : en
Pages : 541
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Book Description
Author: A. F. Bednarik
Publisher:
ISBN:
Category : Heptageniidae
Languages : en
Pages : 102
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Book Description
A revision of the genus Stenonema Traver, based on a study of variability in species range and the application of a biological definition of species. Characteristics and terminology are reviewed, systematic accounts and keys listed, evolutionary biology discussed for Stenonema mayflies in streams and rivers west and east of the Mississippi.
Author: John J. Magnuson
Publisher:
ISBN:
Category : Aquatic animals
Languages : en
Pages : 172
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Book Description
Fly ash from the 527-MW Coal-fired Columbia Generating Station Unit I (Columbia Co., Wisconsin) is discharged as a slurry into an adjacent ashpit. Water from the ashpit is pumped to a ditch that joins the ashpit drain and Rocky Run Creek before they reach the Wisconsin River. Habitat alterations have been noted as relatively minor changes in water quality parameters (e.g., alkalinity, hardness, pH, and turbidity), as increased amounts of some dissolved trace elements (Cr, Ba, Al, Cd, and Cu), and as the precipitation of trace elements (Al, Ba, and Cr) into a floc that coats the stream bottoms. The ashpit drain became an unsuitable habitat for aquatic invertebrates after Columbia I began operating. Rocky Run Creek is still a suitable habitat for many aquatic invertebrates, but evidence of sublethal stresses and habitat avoidance exists.
