Author: Lee E.. RogersPublisher:
ISBN:
Category : Robber flies
Languages : en
Pages : 35
Book Description
Asilidae of the Pawnee National Grasslands, in Northeastern Colorado
Author: Lee E.. RogersPublisher:
ISBN:
Category : Robber flies
Languages : en
Pages : 35
Book Description
The Systematics of Lasiopogon (Diptera:Asilidae)
Author: Robert A. CanningsPublisher:
ISBN:
Category : Nature
Languages : en
Pages : 368
Book Description
The genus Lasiopogon is a widespread group of robber flies (Diptera: Asilidae) inhabiting the north temperate parts of the Earth. This study is the first to examine the genus as a complete entity and clearly define intrageneric relationships. It is also the first to pay special attention to the male and female genitalia, important structures in the taxonomy of the genus. There are 118 known species of Lasiopogon, about half of these yet to be described. Dr. Cannings gives a cladistic overview of some defined species groups, and provides a detailed taxonomic and phylogenetic analysis of the 7 species groups and 29 species in the opaculus section, comprising about 25 per cent of the genus. He describes 14 new species in this section and redescribes the others. Dr. Cannings also offers a biogeographic hypothesis of the history of Lasiopogon, suggesting that the genus may have originated in Laurasia as early as the late Jurassic period.
The Desert Grassland
Author: Mitchel P. McClaranPublisher: University of Arizona Press
ISBN: 9780816518234
Category : Science
Languages : en
Pages : 364
Book Description
The mixed grass and shrub vegetation known to scientists as desert grassland is common to the basins and valleys that skirt the mountain ranges throughout southwestern North America, extending from Arizona, New Mexico and Texas down through thirteen Mexican states. This variegated ground cover is crucial to life in an arid environment. The Desert Grassland offers the most comprehensive study to date of these flora and the rich biotic communities they support.Leading experts in geography, biology, botany, zoology, and geoscience present new research on the desert grassland and review a vast amount of earlier work. They reveal that present-day grasses once grew in the ice-age forests that existed in these areas before the climate dried and the trees vanished and how the intensity and frequency of fire can influence the plant and animal species of the grassland. They also document how the influence of humans--from Amerindians to contemporary ranchers, public land managers, and real estate developers--has changed the relative abundance of woody and herbaceous species and how the introduction of new plants and domesticated animals to the area has also affected biodiversity. The book concludes with a review of the attempts, both failed and successful, to reestablish plants in desert grasslands affected by overgrazing, drought, and farm abandonment.Meticulously researched and copiously illustrated, The Desert Grassland is a major contribution to ecological literature. For advanced lay readers as well as students and scholars of history, geography, and ecology, it will be a standard reference work for years to come.
Abstracts: US/IBP Ecosystem Analysis Studies
Author: International Biological ProgrammePublisher:
ISBN:
Category : Ecology
Languages : en
Pages : 260
Book Description
Prairie National Park (N.P.), Proposed (KS,OK), Alternative Study Areas, Preliminary Environmental Assessment (EA) B1; Preliminary Environmental Assessment (EA) Appendices A-N B2; Reports on Studies of New Areas with Potential for Inclusion (1978)
Author: Proposed Prairie National Park, Kansas/Oklahoma: Preliminary environmental assessment, alternative study areas
Author: United States. National Park ServicePublisher:
ISBN:
Category : Prairie National Park (Kan. and Okla.)
Languages : en
Pages : 592
Book Description
Catalog of the Heteroptera or True Bugs, of Canada and the Continental United States
Author: Thomas J. HenryPublisher: CRC Press
ISBN: 1351078895
Category : Computers
Languages : en
Pages : 980
Book Description
A primary aim of this catalog is to offer an accounting for each species as originally proposed and for the first usage only of all its name combinations (including valid names, synonymies, and misspellings) that have been published for our area. We follow the policy outlined by the 1985 Code of Zoological Nomenclature for nonmenclatorial proposes that a dissertation for an advanced educational degree is not published unless it satisfies the criteria present in Articles 8 and 9.
Analysis of Structure, Function, and Utilization of Grassland Ecosystems: A progress report
Author: George M. Van DynePublisher:
ISBN:
Category : Grassland ecology
Languages : en
Pages : 322
Book Description
Author: 
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