Isle Royale National Park (N.P.), Natural and Cultural Resource(s) Management Plan (RMP) and Environmental Assessment (EA). PDF Download
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Author:
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ISBN:
Category :
Languages : en
Pages : 708
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 708
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Author:
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ISBN:
Category :
Languages : en
Pages : 434
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Author: Paul Sadin
Publisher:
ISBN:
Category : Environmental protection
Languages : en
Pages : 412
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Author: N.C. Stenseth
Publisher: Springer Science & Business Media
ISBN: 9401123381
Category : Science
Languages : en
Pages : 359
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4.1.1 Demographic significance Confined populations grow more rapidly than populations from which dispersal is permitted (Lidicker, 1975; Krebs, 1979; Tamarin et at., 1984), and demography in island populations where dispersal is restricted differs greatly from nearby mainland populations (Lidicker, 1973; Tamarin, 1977, 1978; Gliwicz, 1980), clearly demonstrating the demographic signi ficance of dispersal. The prevalence of dispersal in rapidly expanding populations is held to be the best evidence for presaturation dispersal. Because dispersal reduces the growth rate of source populations, it is generally believed that emigration is not balanced by immigration, and that mortality of emigrants occurs as a result of movement into a 'sink' of unfavourable habitat. If such dispersal is age- or sex-biased, the demo graphy of the population is markedly affected, as a consequence of differ ences in mortality in the dispersive sex or age class. Habitat heterogeneity consequently underlies this interpretation of dispersal and its demographic consequences, although the spatial variability of environments is rarely assessed in dispersal studies.
Author: Northern Rocky Mountain Wolf Recovery Team
Publisher:
ISBN:
Category : Endangered species
Languages : en
Pages : 88
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Author: Edward E. Bangs
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 8
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Author: United States. National Park Service
Publisher:
ISBN:
Category : Isle Royale National Park (Mich.)
Languages : en
Pages : 248
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Book Description
Author: Scott Ferson
Publisher: Springer Science & Business Media
ISBN: 0387954864
Category : Nature
Languages : en
Pages : 334
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Book Description
Reviews the quantitative tools used in the study of subjects such as biodiversity, resource management and endangered species preservation. Topics covered include population viability analysis, population dynamics, metapopulation models, estimating timing of extinctions, quasi-extinction and more.
Author: National Science Board (U.S.)
Publisher:
ISBN:
Category : Executive departments
Languages : en
Pages : 430
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Author: Robert Wood
Publisher: Mountaineers Books
ISBN: 1594858284
Category : Sports & Recreation
Languages : en
Pages : 300
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Book Description
In 1889 Washington's then governor, Elisha Ferry, called on men of adventure to cross the Olympic Mountains, a range shrouded in mystery. The Seattle Press, the state's primary newspaper, stepped up to the challenge, sponsoring the Press Expedition. And soon departed a band of men into the mountains during one of the worst winters in recorded history...
