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Author : Anonim
Publisher : Unknown
Page : 0 pages
File Size : 47,7 Mb
Release : 1980
Category : Habitat (Ecology)
ISBN : OCLC:251771543
Author : Anonim
Publisher : Unknown
Page : 146 pages
File Size : 52,6 Mb
Release : 1980
Category : Animals
ISBN : ERDC:35925002749015
Author : Anonim
Publisher : Unknown
Page : 0 pages
File Size : 53,8 Mb
Release : 1976
Category : Wildlife conservation
ISBN : OCLC:4073098
Author : Anonim
Publisher : Unknown
Page : 196 pages
File Size : 52,8 Mb
Release : 1982
Category : Important bird areas
ISBN : OCLC:861187676
Author : Anonim
Publisher : Unknown
Page : 237 pages
File Size : 41,6 Mb
Release : 1981*
Category : Animals
ISBN : OCLC:4073098
Author : Anonim
Publisher : Unknown
Page : 58 pages
File Size : 52,8 Mb
Release : 1987
Category : Environmental impact analysis
ISBN : CORNELL:31924051844920
Author : Nevin D. Holmberg
Publisher : Unknown
Page : 196 pages
File Size : 55,6 Mb
Release : 1977
Category : Animals
ISBN : ERDC:35925002825468
Author : Carl L. Armour,Richard J. Fisher,James W. Terrell
Publisher : Unknown
Page : 66 pages
File Size : 55,7 Mb
Release : 1984
Category : Fish habitat improvement
ISBN : UCSD:31822016452260
Author : Anonim
Publisher : Unknown
Page : 96 pages
File Size : 44,6 Mb
Release : 1977
Category : Animal ecology
ISBN : UCSD:31822011736881
Author : Anonim
Publisher : Unknown
Page : 68 pages
File Size : 51,8 Mb
Release : 1982
Category : Aquatic habitats
ISBN : UOM:39015086461293
Author : United States. Army. Corps of Engineers
Publisher : Unknown
Page : 380 pages
File Size : 48,9 Mb
Release : 1982
Category : Habitats, Evaluation of
ISBN : ERDC:35925002823786
Author : U.S. Fish and Wildlife Service. Division of Ecological Services
Publisher : Unknown
Page : 160 pages
File Size : 46,9 Mb
Release : 1980
Category : Habitat (Ecology)
ISBN : UOM:39015029993840
Author : Peter Schmidt,Donna Allard,maureen Smith
Publisher : Unknown
Page : 26 pages
File Size : 48,8 Mb
Release : 2004
Category : Electronic
ISBN : OCLC:316500846
Located in the northern Willamette River basin, Tualatin River National Wildlife Refuge (Refuge) was established in 1992 with an approved acquisition boundary to accommodate willing sellers with potentially restorable holdings within the Tualatin River floodplain. The Refuge's floodplain of seasonal and emergent wetlands, Oregon ash riparian hardwood, riparian shrub, coniferous forest, and Garry oak communities are representative of remnant plant communities historically common in the Willamette River valley and offer an opportunity to compensate for wildlife habitat losses associated with the Willamette River basin federal hydroelectric projects. The purchase of the Oleson Units as additions to the Refuge using Bonneville Power Administration (BPA) funds will partially mitigate for wildlife habitat and target species losses incurred as a result of construction and inundation activities at Dexter and Detroit Dams. Lands acquired for mitigation of Federal Columbia River Power System (FCRPS) impacts to wildlife are evaluated using the Habitat Evaluation Procedures (HEP) methodology, which quantifies how many Habitat Units (HUs) are to be credited to BPA. HUs or credits gained lessen BPA's debt, which was formally tabulated in the FCRPS Loss Assessments and adopted as part of the Northwest Power and Conservation Council's Fish and Wildlife Program as a BPA obligation (NWPCC, 1994 and 2000). There are two basic management scenarios to consider for this evaluation: (1) Habitats can be managed without restoration activities to benefit wildlife populations, or (2) Habitats can be restored using a number of techniques to improve habitat values more quickly. Without restoration, upland and wetland areas may be periodically mowed and disced to prevent invasion of exotic vegetation, volunteer trees and shrubs may grow to expand forested areas, and cooperative farming may be employed to provide forage for migrating and wintering waterfowl. Abandoned cropland would comprise over half the total acreage and may be mowed or hayed to reduce exotic vegetation. Grasslands and wetlands may similarly be mowed or hayed, or left fallow. Wetlands would be subject to periodic flooding from the Tualatin River, but would drain quickly and promote undesirable vegetation. Riverine, forested wetland, and mixed forest habitats would likely change little from their current condition. Active restoration would include restoring wetlands with limited use of dikes and water control structures; planting and maintaining native grass, trees, and shrubs; and aggressive management of non-native invasive vegetation. Hydrology would be restored to emergent wetlands mimicking natural cycles thus promoting hydrophytic vegetation beneficial to fish and wildlife. Grassland and former crop areas would be planted with native grasses and trees to recreate prairie and savanna habitat types. Riverine riparian and forested wetland areas would be expanded by planting native trees and shrubs benefiting a multitude of species. Although a 'hands off' approach may provide habitat benefits after many decades, a more proactive approach would provide far more benefits to fish and wildlife, and thus would provide additional habitat credits more quickly.
Author : Barry S. Payne,Katherine S. Long
Publisher : Unknown
Page : 68 pages
File Size : 51,7 Mb
Release : 1986
Category : Animals
ISBN : UCR:31210025593409
Habitat Suitability Index (HSI) models of the US Fish and Wildlife Service's Habitat Evaluation Procedures (HEP) are reviewed with the objective of determining the necessary modifications to model requirements (if any) if data for the models are to be obtained from aerial photographic sensors. The white-tailed deer model was chosen for the conversion exercise because of its interest to human activities that can readily be translated to economic and recreational values. Steps that must be included in an optimum remote sensing effort are outlined, with the relevance of each step to the HEP being illustrated where possible. Forty-one HSI models that are species specific are reviewed to show the feasibility of gathering necessary input data by remote sensing. The guilds formed by grouping species of similar requirements are discussed.
Author : Carl L. Armour,Richard J. Fisher,James W Terrell
Publisher : Unknown
Page : 30 pages
File Size : 50,5 Mb
Release : 1984
Category : Fish populations
ISBN : OCLC:973530952
