Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 708
Book Description
Isle Royale National Park (N.P.), Natural and Cultural Resource(s) Management Plan (RMP) and Environmental Assessment (EA).
Author: Isle Royale National Park (N.P.), Wilderness and Backcountry Management Plan
Author: Managing a Land in Motion
Author: Paul SadinPublisher:
ISBN:
Category : Environmental protection
Languages : en
Pages : 412
Book Description
Animal Dispersal
Author: N.C. StensethPublisher: Springer Science & Business Media
ISBN: 9401123381
Category : Science
Languages : en
Pages : 359
Book Description
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.
Northern Rocky Mountain Wolf Recovery Plan
Author: Northern Rocky Mountain Wolf Recovery TeamPublisher:
ISBN:
Category : Endangered species
Languages : en
Pages : 88
Book Description
Return of a Predator
Author: Edward E. BangsPublisher:
ISBN:
Category : Government publications
Languages : en
Pages : 8
Book Description
Isle Royale National Park Wilderness and Backcountry Management Plan and Environmental Impact Statement
Author: United States. National Park ServicePublisher:
ISBN:
Category : Isle Royale National Park (Mich.)
Languages : en
Pages : 248
Book Description
Status and Trends of the Nation's Biological Resources, V. 1 and 2
Author: Catherine E. Puckett HaeckerPublisher: Geological Survey (USGS)
ISBN:
Category : Nature
Languages : en
Pages : 482
Book Description
Assesses the health of the United States plants, animals, and ecosystems.
Airport Environmental Handbook
Author: United States. Federal Aviation AdministrationPublisher:
ISBN:
Category : Airports
Languages : en
Pages : 128
Book Description
Hiking from Portland to the Coast
Author: James D. ThayerPublisher:
ISBN: 9780870718779
Category : Sports & Recreation
Languages : en
Pages : 0
Book Description
A guidebook for hikers, bikers, and equestrians, Hiking from Portland to the Coast explores the many trails and logging roads that crisscross the northern portion of Oregon's Coast Range. Designed to showcase convenient "looped" routes, it also describes complete throughways connecting Portland to the coastal communities of Seaside and Tillamook. Each of the 30 trails described includes a backstory to help users appreciate the history and significance of the places through which they are traveling.