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The influence of mine waste contamination on invertebrates and fish in the Methow River Valley, Okanogan County, Washington (U.S.A.)
(2003)
A study of mine-waste contamination effects on Methow River habitat on the eastern slopes of the north Cascade Mountains in Washington state, U.S.A., revealed trace element impacts on invertebrates and fish. Ore deposits in the area were mined for gold, silver, copper and zinc until the early 1950's, but the mines are now ...
Holocene vegetational history of the central Arctic foothills, northern Alaska: pollen representation of tundra and edaphic controls on the response of tundra to climate change
(2002)
As arctic tundra responds to climate change, does its response vary spatially because of small-scale edaphic heterogeneity? This research addresses this question by reconstructing the past vegetational response to climate change of ecosystems on adjacent, but contrasting, glaciated surfaces in the central Arctic Foothills of ...
Effects of timber harvest and forest edges on abundance, viability, and physiology of understory plants in Pseudotsuga forests of western Washington
(2004)
There is widespread interest in the ecological effects of timber harvest, the resultant fragmentation of forest habitat, and the increased area of forest edges. However, there has been surprisingly little research devoted to the consequences of these management activities for understory plants. I investigated short-term ...
Mycorrhizal fungus communities of Douglas-fir (Pseudotsuga menziesii) seedlings and trees: effects of proximity to residual trees
(2004)
The influence of mature Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees in partially harvested stands on seedling growth and colonization by ectomycorrhizal fungi (EMF) is not well understood. To investigate this, Douglas-fir seedlings were planted near (<6 m) and far (>16 m) from 44- to 72-year-old residual Douglas-fir ...
A canopy perspective of community dynamics of an old-growth Pseudotsuga-Tsuga forest
(2000)
Old-growth Pseudotsuga-Tsuga forests of the western Cascade Range are characterized by presence of large, old trees of Pseudotsuga menziesii (Mirb.) Franco var. menziesii. Colonizing soon after a stand-replacing disturbance, P. menziesii is a long-lived pioneer species that persists in these forests for centuries. In this ...
The fate of canopy water in the Findley Lake basin, WA
(2003)
This dissertation examined the fate of canopy water in the Findley Lake Basin, WA (47°04' N, 121°25'W) during the growing seasons of 1994 and 1995. Field measurements were taken at three sites: Lake (1170 m), Midslope (1230 m) and Ridge (1320 m). Field data included stand and canopy structure, canopy wetness, fog, and ...
Controlling the forest understory: wild mushroom politics in central Oregon
(2000)
In this dissertation, I illustrate how disciplinary power techniques are being used today to extend and solidify state control over forest understory products located on national forest lands in the Pacific Northwest. The spring wild mushroom harvest on the Sisters Ranger District in central Oregon serves as a case study for ...
Collaborative design of fish habitat enhancement projects in streams and rivers of Washington State
(2000)
A study was conducted of project-level design processes related to fish habitat enhancement projects across Washington state. Data was collected from 65 projects within 14 Water Resource Inventory Areas. Over 200 individuals and agencies were found to have participated in project-level decision making. Social network analysis ...
Phalaris arundinacea control and riparian restoration within agricultural watercourses in King County, Washington
(2008)
Phalaris arundinacea (reed canarygrass) is one of the most aggressive and challenging invasive species within wetlands of the Pacific Northwest. This invasive typically dominates a site, producing a monoculture, reducing the biodiversity and microhabitats on the site.Three treatments were tested within agricultural watercourses ...
Spatial and temporal dynamics of fire and vegetation change in Thunder Creek watershed, North Cascades National Park, Washington
(2003)
Little is known about the history of fire and vegetation in the North Cascade Range. I conducted two studies in the lower Thunder Creek watershed, North Cascades National Park to evaluate past fire and forest vegetation dynamics. The first study evaluated forest development following a series of fires c. 150 years ago. Tree ...