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776 - 800 of 1229 Items << < 27 28 29 30 31 32 33 34 35 36 > >>
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In 1987, U.S. Department of the Interior's Minerals Management Service (MMS) began a new proposed 5-Year Outer Continental Shelf (OCS) Oil and Gas Leasing Program for mid-1987 through mid-1992. Proposed OCS Lease Sale 132 (off Oregon and...
1992-08 (iso8601)
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The Double-crested Cormorant (Phalacrocorax auritus) is a widespread, colonial, North American waterbird with bicoastal and inland distributions. Four subspecies have been described within North America corresponding to five geographic breeding...
2008-10-21T19:50:25Z (iso8601)
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For many native, imperiled salmonid species, the prioritization of recovery and conservation efforts hinges upon the identification of a species most limiting life stage. The early life-history stage can be a limiting life stage for fish, and...
2009-05-01
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Vegetation structure is important in structuring avian communities. In the sagebrush biome, where
continued habitat loss is thought to threaten shrusteppe-obligate birds, both remotely sensed and field-acquired
measures of big sagebrush (Artemisia...
2012-02 (iso8601)
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Incorporating catch or harvest rate information in repeated-choice
recreation fishing demand models is challenging, since multiple sources of
information may be available and detail on how harvest rates change within
a season is often lacking....
2010 (iso8601)
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The Logan River and its tributaries in northern Utah are among the last remaining habitats that support a significant population of the imperiled Bonneville cutthroat trout (BCT - Oncorhynchus clarki Utah). Efforts to protect and study the...
2011-09-01
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Astragalus oniciformis Barneby is a xerophyte of the sagebrush deserts of
central Idaho. It is a narrow endemic of the upper Snake River Plains
where it inhabits stabilized, aeolian sand deposits over Quaternary basalt
flows. The objective of this...
2001-05-14 (iso8601)
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Two sampling lines were established in the intertidal region at
each of three geographically separate sites on the coast of Oregon.
Each sampling line, which was positioned in the zone dominated by
the brown alga Hedophyllum sessile, was one meter...
1971-08-16 (iso8601)
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Watershed-scale stream temperature models are often one-dimensional because they require fewer data and are more computationally efficient than two- or three-dimensional models. However, one-dimensional models assume completely mixed reaches and...
2019-07-12
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Variability of plant species distributions, plant connunities,
soil and hydrological factors in an area of the Netarts Spit tidal
marsh are examined. The purpose is to advance general understanding
of Oregon's tidal marsh ecosystems in terms of...
1981-05-01 (iso8601)
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and wind throw, is estimated to be about three times the annual growth.
The situation, although serious, is not as critical as this ratio between annual depletion and growth suggests. More than half of the forest lands of this area are primeval,...
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Thesis submitted in partial fulfillment of the requirements for the degree of Master of Community and Regional Planning, and Master of Water Resources, University of New Mexico.
2015-10-12
2015-10-12 2024-09-21 |
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Citizen-science projects engage volunteers to gather or process data to address scientific questions. But
citizen-science projects vary in their ability to contribute usefully for science, conservation, or public policy.
eBird has evolved from a...
2014-01 (iso8601)
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Low dissolved oxygen concentrations (less than 4 milligrams per liter) have been documented in Upper Klamath and Agency Lakes, where they are detrimental to the survival of endangered sucker species in the lakes. The Bureau of Reclamation and the...
2024-09-21
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Plywood panels collected from thirty seven mills located
throughout the Pacific Northwest they were treated with chromated copper
arsenate Type C (CCA-C) or ammoniacal copper zinc arsenate (ACZA) using
modified full cell and full cell processes...
1989-12-22 (iso8601)
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Wild turkeys (Meleagris gallopavo) were first successfully introduced into Oregon and Washington in the 1960s; the population has grown in size and expanded in distribution to a point where it provides an important recreational hunting opportunity...
2013-09-13 (iso8601)
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Background information is presented that provides historical perspectives on the field of mycology in the Pacific Northwest and its role in forest management. The series of events and decisions that have led to previous studies (or lack of...
2013-06-28 (iso8601)
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We inferred the population densities of blue whales (Balaenoptera musculus) and short-beaked
common dolphins (Delphinus delphis) in the Northeast Pacific Ocean as functions
of the water-column’s physical structure by implementing hierarchical...
2015-03-18 (iso8601)
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Hopper dredge disposal of coarse grained sediment was
investigated between May and September, 1986, at a designated disposal
area, Site G, in Coos Bay, Oregon. The objectives of the study were
to: (a) identify and describe the benthic macrofaunal...
1989-08-15 (iso8601)
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Three separation techniques for obtaining interstitial water, i.e., by solvent displacement, modified centrifugation, and gas squeezing, have been investigated. A simple nitrogen gas squeezing technique utilizing an Amicon ultrafiltration cell was...
1993-05-01
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This project has provided the ODFW Marine Habitat Project with a unique
opportunity to make a comparative examination of the habitats and fish communities of a
heavily fished reef off of Siletz Bay, and a nearly unfished reef off Cape Perpetua....
2004-03-29 (iso8601)
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