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Three articles contained within thesis: 1. Dual Disturbance Mechanisms: Insect Outbreaks and Forest Management Effects on Nitrogen Cycling. 2. Effects of Spruce Bark Beetle Outbreak on Regeneration and Nitrogen Availability in Wrangell-St.Elias National Park and Preserve. 3. Managing Alaska's Spruce Beettle-Damaged Forests: Effects on Nitrogen Availability and Forest Regeneration.
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The substantially natural hydrography of the upper Gila River supports one of the highest levels of aquatic and riparian biodiversity in the region, including the largest complement of native fishes and some of the best remaining riparian habitat in the lower Colorado River Basin. Native vegetation dominates the broad and structurally diverse floodplain, creating habitat for hundreds of birds and other wildlife. Two of the Gila’s fish species, spikedace and loach minnow, and a neotropical migratory bird, the southwestern willow flycatcher, are federally listed as endangered. The yellow-billed cuckoo, a candidate species for listing, nests in the Cliff-Gila Valley. Changes to the river’s hydrology, including peak...


    map background search result map search result map Defining Ecosystem Water Needs of the Upper Gila River and Assessing the Impacts of Climate Change Managing Alaskas Spruce Beetle-Damaged Forests: Effects on Nitrogen Availability and Forest Regeneration Defining Ecosystem Water Needs of the Upper Gila River and Assessing the Impacts of Climate Change Managing Alaskas Spruce Beetle-Damaged Forests: Effects on Nitrogen Availability and Forest Regeneration