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176 - 200 of 1229 Items << < 3 4 5 6 7 8 9 10 11 12 > >>
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ill., maps; Thesis (B.A.)-Oregon State University, 1997; Includes bibliographical referenes (leaves 20-22)
1997-05-01
2009-06-11 2009-12-21 |
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A biological inventory of the butterflies of the H. J. Andrews Experimental
Forest [HJA] in Linn/Lane County, Oregon was conducted during 1994 and 1995. It
was the first comprehensive survey of HJA butterflies for the site and serves as a
baseline...
2003-10-31 (iso8601)
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Population trends and patterns in species distributions are the major currencies used to examine responses by biodiversity to changing environments. Effective conservation recommendations require that models of both distribution dynamics and...
2014-12-09 (iso8601)
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Fifty-two one-meter plankton net samples from four stations off Newport, Oregon, were examined for composition and abundance of euphausiids and copepods. They provided data on dominance, species associations and environmental relationships. The...
1966-05-13 (iso8601)
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The Arden R. Gaufin papers (1952-1998) contain correspondence, memoranda, reports, articles, and news clippings on water quality and aquatic insects collected by this Utah biologist.; Biographical Sketch; Arden R. Gaufin (1911-1997) was born in...
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This study examined the foraminifera and the ecologic conditions
of the benthic environment of the Oregon shelf and the uppermost slope
(75-550 m depth) between 143°45' N and 144°40' N. Seasonal collections
monitored the near-bottom marine...
1971-10-28 (iso8601)
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ill., maps; July 1993."; "Cooperative Park Studies Unit, College of Forestry, Oregon State University."; Includes bibliographical references.; This title is a culmination of the first 10-years of the Crater Lake limnological studies and a...
2009-01-26 2009-04-13 |
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The papers of Senior Vice President of the Humane Society of the United States, Patricia Forkan, this
collection ranges from approximately 1971 to 2008 and is primarily composed of records relating the International Whaling Commission.;...
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Many topographic units in the state of Oregon have been only partially explored botanically and very few areas have been collected intensively. Two such areas were selected and a detailed investigation was made of the vegetation. Fairview Mountain...
1949-04-16 (iso8601)
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The papers of Senior Vice President of the Humane Society of the United States, Patricia Forkan, this
collection ranges from approximately 1971 to 2008 and is primarily composed of records relating the International Whaling Commission.;...
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Habitat loss and fragmentation is a crisis affecting wildlife worldwide. In Tanzania, East Africa, a dramatic and recent (<80 years) expansion in human settlement and agriculture threatens to reduce gene flow among protected areas for many species...
2012-02-27 (iso8601)
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The papers of Senior Vice President of the Humane Society of the United States, Patricia Forkan, this
collection ranges from approximately 1971 to 2008 and is primarily composed of records relating the International Whaling Commission.;...
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The extraction of tantalum fluoride complexes by large cationic
extractants (tetraphenylarsonium ion, TPA, and crystal violet) and
by methyl isobutyl ketone (MIBK) has been investigated as a function
of fluoride concentration using ¹⁸² Ta as...
1969-08-15 (iso8601)
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Abstract The Swan Lake-Yonna Valleys area consists of two intermountain valleys with their subordinate side valleys adjoining slopes, and mountainous boundary ridges, In all the area covered is about 256 square miles but the essential agricultural...
2024-05-01
2007-07-28 2005-01-07 |
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If fisheries managers are to effectively manage commercially exploited fish
populations, a basic understanding of the factors that influence fish distribution and
abundance is required. In 2005, efforts to identify Essential Fish Habitat (EFH) for...
2009-06-11 (iso8601)
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Two maps digitized separately; Includes bibliographical references (p. 44-49)
1997-05-01
2005-01-31 2004-12-22 |
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This is the first detailed chromatographic examination of Pseudotsuga menzesii and three other Pseudotsuga species (P. macrocarpa, P. japonica, and P. wilsoniana). The whole bark of these four species was sequentially extracted with hexane,...
1965-05-07 (iso8601)
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Ecological factors associated with the relictual distribution of
the endemic shrub Kalmiopsis leachiana (Ericaceae) were investigated.
A prostrate evergreen species with small coriaceous leaves,
K. leachiana is restricted to two disjunct...
1977-12-08 (iso8601)
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"Prepared for Klamath Basin Ecosystem Foundation, and the Upper Williamson River Catchment Group, in cooperation with the Upper Klamath Basin Working Group, and the Klamath Watershed Council."
2024-05-01
2005-02-16 2005-01-31 |
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The foraminiferal population of Yaquina Bay was investigated
to attempt a correlation of seasonal changes in the hydrography with
observed changes in the faunal distribution patterns. The results
are based on data from two spatial surveys...
1967-12-05 (iso8601)
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The Galapagos Islands, located off the coast of Ecuador, have a spatially diverse marine environment suitable for a variety of species with different climatic requirements. A year-long inventory program was carried out in 2000-2001 to provide...
2004-01-20 (iso8601)
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The introduction of exotic species to areas outside of their native range is one of the greatest threats to the biodiversity of native freshwater organisms. Exotic species have outcompeted native species for resources such as food and shelter, and...
2011-12-01
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The distribution and trophic ecology of neritic reef fishes was
studied to provide biological information useful in conserving these
stocks. Houk and line fishing was conducted from July 1976 to July
1977 on neritic reefs within 5 km of the Oregon...
1978-06-12 (iso8601)
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Summary
The Upper Klamath Basin (UKB) is a high desert region straddling the California-Oregon border east of the Cascade Range. Irrigation and other agricultural practices in the U. S. Bureau of Reclamation's Klamath Project may result in...
2024-05-01
2007-12-28 2006-02-22 |
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Ecologists have historically used species-area relationships (SARs) as a tool to understand the spatial distribution of species. Recent work has extended SARs to focus on individual-level distributions to generate individual species area...
2013-05-01 (iso8601)
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