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Author: Miistakis Institute for the Rockies
Publisher:
ISBN:
Category : Cumulative effects assessment (Environmental assessment)
Languages : en
Pages : 40
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Author: Miistakis Institute for the Rockies
Publisher:
ISBN:
Category : Cumulative effects assessment (Environmental assessment)
Languages : en
Pages : 40
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Book Description
Author: Beverly Gail Dixon
Publisher:
ISBN:
Category : Grizzly bear
Languages : en
Pages : 384
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Book Description
Author: Gordon Stenhouse
Publisher:
ISBN:
Category : Carnivora
Languages : en
Pages : 33
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Author:
Publisher:
ISBN:
Category : Grizzly bear
Languages : en
Pages :
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Author: Miistakis Institute for the Rockies
Publisher:
ISBN:
Category : Grizzly bear
Languages : en
Pages : 66
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Author: Collin D. Bevins
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ISBN:
Category :
Languages : en
Pages :
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Author: A. G. Christensen
Publisher:
ISBN:
Category :
Languages : en
Pages : 9
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Author: John Weaver
Publisher:
ISBN:
Category : Grizzly bear
Languages : en
Pages : 13
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Book Description
Cumulative effects may be defined as the combined effects upon a species and its habitat resulting from multiple land uses over space and time. A Cumulative Effects Model (CEM) has been designed to (1) quantify individual and collective effects of land uses and activities in space and through time and (2) provide mangers an analytic tool for evaluating alternative decisions relative to grizzly bear recovery goals and objectives. The CEM is composed of three submodels: habitat, displacement, and mortality. The habitat and displacement submodels determine the habitat effectiveness value of an area while the mortality submodel portrays mortality risks. The submodels integrate basic variables that are significant and subject to management. The habitat submodel incorporates four variables: (1) food and thermal cover, (2) habitat diversity, (3) seasonal equity, and (4) denning suitability. These variables combined indicate the year-round habitat quality of an area. The displacement submodel includes four variables of human activity: (1) location relative to hiding cover, (2) type (motorized or nonmotorized), (3) nature (linear, point, or dispersed), and (4) intensity (high or low use, day or overnight use). Displacement is characterized by a coefficient of disturbance and by an associated zone of influence. The mortality submodel incorporates four variables of human activity: (1) location relative to habitat quality, (2) nature, (3) intensity and sanitation, and (4) firearms. By integrating the submodels, the CEM provides two basic outputs: habitat effectiveness value and mortality risk index. Once thresholds appropriate for grizzly bear recovery are established for habitat effectiveness and mortality risk, managers can manipulate the numerous variables and analyze the competitive and cumulative effects of various land uses through computer simulations.
Author: John L. Weaver
Publisher:
ISBN:
Category : Grizzly bear
Languages : en
Pages : 25
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Book Description
...Cumulative Effects Assessment models hold promise as a major advance in grizzly bear habitat planning and management. Full realization of their utility will require continued attention to habitat mapping, verification, sensitivity analyses and model streaming, data base management, and technology transfer. CEA models may serve both as tools for proactive land management involving grizzly bears and as instruments with which managers may obtain new and larger views of the living landscape. -- Executive Summary.
Author: United States. Forest Service
Publisher:
ISBN:
Category : Grizzly bear
Languages : en
Pages : 58
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