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Title: Assessing cumulative impacts to wintering Bald Eagles and their habitats in western Washington

Abstract

Bald Eagles (Haliaeetus leucocephalus) of Washington, the largest wintering population in the lower 48 states, are subject to numerous pressures and impacts from human activites. An evaluative method potential cumulative impacts of multiple hydroelectric development and logging activities on known and potential eagle use areas. Four resource components include food supply, roost sites, mature riparian forest, and disturbance. In addition to actual estimates of losses in food supply (fish biomass in kg) and habitat (km/sup 2/) in one river basin, impact levels from 0 (none) to 4 (high) were assigned for each development and for each component based on the impacts anticipated and the estimated value of the site to eagles. Midwinter eagle surveys, aerial photography, topographic and forest stand maps, and site visits were used in the analysis. Impacts were considered additive for all but the disturbance component, which was adjusted for potential synergism between developments. Adjustments were made for mitigation before the impacts were aggregated into a single, dimensionless cumulative impact score. 50 refs., 1 fig., 1 tab.

Authors:
;
Publication Date:
Research Org.:
Argonne National Lab., IL (USA)
OSTI Identifier:
6959799
Report Number(s):
CONF-8806163-1
ON: DE88011955
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Conference
Resource Relation:
Conference: Ecosystems management conference: rare species and significant habitats, Syracuse, NY, USA, 6 Jun 1988; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
13 HYDRO ENERGY; 54 ENVIRONMENTAL SCIENCES; BIOLOGICAL STRESS; SEASONAL VARIATIONS; BIRDS; HYDROELECTRIC POWER PLANTS; ENVIRONMENTAL IMPACTS; ENDANGERED SPECIES; ENVIRONMENTAL EFFECTS; EVALUATION; HABITAT; HUMAN POPULATIONS; HYDROELECTRIC POWER; MITIGATION; WASHINGTON; ANIMALS; ELECTRIC POWER; ENERGY SOURCES; FEDERAL REGION X; NORTH AMERICA; POPULATIONS; POWER; POWER PLANTS; RENEWABLE ENERGY SOURCES; USA; VARIATIONS; VERTEBRATES; 130600* - Hydro Energy- Environmental Aspects; 510500 - Environment, Terrestrial- Site Resource & Use Studies- (-1989)

Citation Formats

Witmer, G.W., and O'Neil, T.A. Assessing cumulative impacts to wintering Bald Eagles and their habitats in western Washington. United States: N. p., 1988. Web.
Witmer, G.W., & O'Neil, T.A. Assessing cumulative impacts to wintering Bald Eagles and their habitats in western Washington. United States.
Witmer, G.W., and O'Neil, T.A. Fri . "Assessing cumulative impacts to wintering Bald Eagles and their habitats in western Washington". United States.
@article{osti_6959799,
title = {Assessing cumulative impacts to wintering Bald Eagles and their habitats in western Washington},
author = {Witmer, G.W. and O'Neil, T.A.},
abstractNote = {Bald Eagles (Haliaeetus leucocephalus) of Washington, the largest wintering population in the lower 48 states, are subject to numerous pressures and impacts from human activites. An evaluative method potential cumulative impacts of multiple hydroelectric development and logging activities on known and potential eagle use areas. Four resource components include food supply, roost sites, mature riparian forest, and disturbance. In addition to actual estimates of losses in food supply (fish biomass in kg) and habitat (km/sup 2/) in one river basin, impact levels from 0 (none) to 4 (high) were assigned for each development and for each component based on the impacts anticipated and the estimated value of the site to eagles. Midwinter eagle surveys, aerial photography, topographic and forest stand maps, and site visits were used in the analysis. Impacts were considered additive for all but the disturbance component, which was adjusted for potential synergism between developments. Adjustments were made for mitigation before the impacts were aggregated into a single, dimensionless cumulative impact score. 50 refs., 1 fig., 1 tab.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

Conference:
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