干旱区生态环境知识资源中心(Arid): Impacts of Water Levels on Breeding Canada Geese and Methods for Mitigation and Management in the Southern Flathead Valley, Montana, 1983-1987 Final Report.

Arid

DOI	10.2172/5692559
报告编号	DOE/BP-10062-3
来源ID	OSTI_ID: 5692559
	Impacts of Water Levels on Breeding Canada Geese and Methods for Mitigation and Management in the Southern Flathead Valley, Montana, 1983-1987 Final Report.
	Mackey, Dennis L.; Gregory, Shari K.; Matthews, William C. Jr.; Claar, James J.; Ball, I. Joseph
英文摘要	Kerr Hydroelectric Dam is located at the south end of Flathead Lake, controls water levels on the lake and the Flathead River below the dam, and is currently operated as a load control facility. Current operation of Kerr Dam creates the greatest yearly water level fluctuations on both the lake and river during the Canada goose (Branta canadensis moffitti) brood and nesting period. Data collected from 1980-1982 indicated that goose nest numbers on the river were lower than during the 1950's, and that brood habitat on the lake may be limiting the goose population there. Our study was conducted from 1983-1987 to determine the effects of Kerr Dam operation on Canada goose populations and habitat on the south half of Flathead Lake and the Flathead River, and to formulate management and mitigation recommendations. Nesting geese on the river appeared to be negatively affected by a lack of nest sites free from predators, and responded to available artificial nest structures with an increase in nest numbers and nesting success. Under current dam operation, river channel depths and widths do not discourage access to nesting islands by mammalian predators during some years and high predation on ground nests occurs. Intensively used brood areas on the lake and river were identified and described. Brood habitat on the lake was lower in quality and quantity than on the river due to dam operations. Gosling mortality on the lake was high, almost 2 times higher than on the river. Lake broods expended more energy obtaining food than river broods. Losses of brood habitat in the form of wet meadow marshes were documented and mitigation options developed. Management/mitigation alternatives and monitoring methods for nesting and brooding geese were identified.
出版年	1987
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	13 HYDRO ENERGY ; 54 ENVIRONMENTAL SCIENCES ; DAMS ; ENVIRONMENTAL EFFECTS ; GEESE ; HABITAT ; REPRODUCTION ; HYDROELECTRIC POWER PLANTS ; LAKES ; MITIGATION ; MONTANA ; MORTALITY ; RECOMMENDATIONS ; WATER RESERVOIRS ; ANIMALS ; BIRDS ; FEDERAL REGION VIII ; FOWL ; NORTH AMERICA ; POWER PLANTS ; SURFACE WATERS ; USA ; VERTEBRATES Canada geese - Montana - Flathead Lake - Reproduction 130600* -- Hydro Energy-- Environmental Aspects ; 520500 -- Environment, Aquatic-- Site Resource & Use Studies-- (-1989)
URL	http://www.osti.gov/scitech/servlets/purl/5692559
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/263964
推荐引用方式 GB/T 7714	Mackey, Dennis L.,Gregory, Shari K.,Matthews, William C. Jr.,et al. Impacts of Water Levels on Breeding Canada Geese and Methods for Mitigation and Management in the Southern Flathead Valley, Montana, 1983-1987 Final Report.,1987.