Author: UnescoPublisher:
ISBN:
Category : Ecology
Languages : en
Pages : 364
Book Description
Ecologie Des Régions Subarctiques
Author: UnescoCurrent Catalog
Author: National Library of Medicine (U.S.)Publisher:
ISBN:
Category : Medicine
Languages : en
Pages :
Book Description
First multi-year cumulation covers six years: 1965-70.
Abstracts of North American Geology
Author: Nature and Resources
Author: Forest Development in Cold Climates
Author: John AldenPublisher: Springer Science & Business Media
ISBN: 1489916008
Category : Science
Languages : en
Pages : 565
Book Description
As forests decline in temperate and tropical climates, highly-developed countries and those striving for greater economic and social benefits are beginning to utilize marginal forests of high-latitude and mountainous regions for resources to satisfy human needs. The benefits of marginal forests range from purely aesthetic to providing resources for producing many goods and services demanded by a growing world population. Increased demands for forest resources and amenities and recent warming of high latitude climates have generated interest in reforestation and afforestation of marginal habitats in cold regions. Afforestation of treeless landscapes improves the environment for human habitation and provides for land use and economic prosperity. Trees are frequently planted in cold climates to rehabilitate denuded sites, for the amenity of homes and villages, and for wind shelter, recreation, agroforestry, and industrial uses. In addition, forests in cold climates reduce the albedo of the earth's surface in winter, and in summer they are small but significant long-lived sinks for atmospheric carbon dioxide. Finally, growth and reproductive success of forests at their geographic limits are sensitive indices of climatic change. As efforts to adapt forests to cold climates increase, however, new afforestation problems arise and old ones intensify. Austral, northern, and altitudinal tree limits are determined by many different factors. Current hypotheses for high-latitude tree limits are based on low growing-season temperatures that inhibit plant development and reproduction.
Geological Survey Bulletin
Author: Geophysical Abstracts
Author: Geophysical Abstracts
Author: Geological Survey (U.S.)Publisher:
ISBN:
Category : Geophysics
Languages : en
Pages : 812
Book Description
Bibliography of North American Geology
Author: Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 1300
Book Description
1919/28 cumulation includes material previously issued in the 1919/20-1935/36 issues and also material not published separately for 1927/28. 1929/39 cumulation includes material previously issued in the 1929/30-1935/36 issues and also material for 1937-39 not published separately.
National Library of Medicine Current Catalog
Author: National Library of Medicine (U.S.)Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1106
Book Description