Search
« Previous | 401 - 500 of 8,700 | Next »
Search Results
-
401. [Image] The Water Report - USFWS to conduct bull trout review ID, MT, OR, WA: groups criticize censored analysis
Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. See the full report at http://www.thewaterreport.com/Citation -
402. [Image] The Water Report - Tribes sue PacifiCorp
Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. See the full report at http://www.thewaterreport.com/Citation -
Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. See the full report at http://www.thewaterreport.com/
Citation -
Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. See the full report at http://www.thewaterreport.com/
Citation -
405. [Image] The Water Report - Bull trout: critical habitat
Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. See the full report at http://www.thewaterreport.com/Citation -
406. [Image] The Water Report - The role of science in the ESA
Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. See the full report at http://www.thewaterreport.com/Citation -
Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. Includes bibliographical references. See the full report at http://www.thewaterreport.com/
Citation -
408. [Image] The Water Report - Klamath FERC CA/OR: dam removal
Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. FERC is an abbreviation for Federal Energy Regulatory Commission. See the full report at http://www.thew...Citation -
Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. See the full report at http://www.thewaterreport.com/
Citation -
Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. See the full report at http://www.thewaterreport.com/
Citation -
Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. Includes bibliographic references. See the full report at http://www.thewaterreport.com/.
Citation -
412. [Image] The Water Report. Klamath Decisions: Court rulings on "takings" and BIOP/RPA sufficiency
Only portions of issues of The Water Report are available in the Klamath Waters Digital Library. The abbreviations in the title are for Biological opinion (BIOP) and reasonable and prudent alternative ...Citation -
In this Candidate Notice of Review (CNOR), we, the U.S. Fish and Wildlife Service (Service), present an updated list of plant and animal species native to the United States that we regard as candidates ...
Citation -
414. [Image] Area between the N-10 Lateral and the 101-10-C Drain
CN-12-201-514NA Klamath Project - Oregon-California. Area between the N-10 Lateral and the 101-10-C Drain which could be seeded with grass for birds and wildlife habitat; May 1975; USBR photo by J. W. ...Citation -
CN-12-201-571NA Klamath Project – California. Also, showing burned area, where considerable wildlife habitat was destroyed by careless burning; May 1975; USBR photo by J. W. Legg
Citation -
416. [Image] Raising Upper Klamath Lake, appraisal study : draft.
Executive Summary This report documents an appraisal-level evaluation of raising Upper Klamath Lake in south-central Oregon. The lake is the State's largest freshwater lake and is a principal storage feature ...Citation -
KLAMATH RIVER RECOVERY UNIT CHAPTER OF THE BULL TROUT RECOVERY PLAN EXECUTIVE SUMMARY CURRENT SPECIES STATUS Klamath River bull trout were listed as a distinct population segment ...
Citation -
418. [Image] Upper Klamath Basin bull trout conservation strategy : part 1, a conceptual framework for recovery, final
EXECUTIVE SUMMARY This document presents the framework of a plan to reverse the decline of bull trout (Salvelinus confluentus) populations in the Klamath Basin. If successful, we expect bull trout ...Citation -
Abstract An abstract of the thesis of Jeffrey Scott Conaway for the Master of Science in Geology presented December 8, 1999. Title: Hydrogeology and Paleohydrology in the Williamson River Basin, Klamath ...
Citation -
The study examines two species of sucker,the shortnose sucker(chasmistes brevirostrix), and the Lost River sucker,(deltisties luxatus) that inhabit Upper Klamath Lake and the effects of chronic toxicity ...
Citation -
421. [Article] Stream-Associated Amphibian Habitat Assessment in the Portland-Vancouver Metropolitan Region
This study assessed the influence of landscape development on stream-associated amphibians in forested riparian areas within the Portland-Vancouver metropolitan region. Human alteration of landscapes may ...Citation -
As replacement and removal of undersized culverts gains momentum as an effective technique for restoring natural stream flows and removing fish passage barriers, it is important to evaluate the benefits ...
Citation -
423. [Article] Post-occupancy Evaluation at the Zoo: Behavioral and Hormonal Indicators of Welfare in Orangutans (Pongo pygmaeus abelii)
An increased understanding of species-specific behavioral needs has lead zoos to focus on providing more naturalistic and stimulating environments. Scientific assessments of how changes in habitat affect ...Citation -
424. [Article] An Experimental Investigation of Nest Reuse and Nest Site Selection in an Open-Cup Nesting Passerine
Eastern Kingbirds (Tyrannus tyrannus) breed from coast to coast in North America and build open-cup nests in trees. They have been extensively studied across most of their range and have only on occasion ...Citation -
425. [Article] Behavioral Observation and Paternal Investment of Eastern Kingbirds at Malheur National Wildlife Refuge
We have been studying the population of Eastern Kingbirds breeding in riparian habitats in Malheur National Wildlife Refuge (eastern Oregon) since 2002. These efforts have created an ideal research environment ...Citation -
426. [Article] Studies of ecological factors that affect the population and distribution of the western gray squirrel in northcentral Oregon
The western gray squirrel (Sciurus griseus griseus Ord) occur only in the Pacific states and in a small corner of extreme western Nevada. Field studies of aspects of the ecology of the most widely distributed ...Citation -
427. [Article] The Biology of Eastern Kingbirds at Malheur National Wildlife Refuge: Survival, Reproduction, and Testosterone Secretion
This dissertation presents the results of a study that I undertook to better understand the breeding biology of Eastern Kingbirds (hereafter, kingbirds) at Malheur National Wildlife Refuge in southeastern ...Citation -
The present study was undertaken to determine the incidence of infestation with Demodex folliculorum, a skin mite parasitizing man, and to investigate those factors which influence its occurrence. These ...
Citation -
429. [Article] Vocalizations of the Townsend chipmunk (Eutamias townsendii)
This study describes and analyzes the vocalizations of the Townsend chipmunk (Eutamias townsendii) in Oregon. Tape recordings of calls were collected primarily from Forest Park in Portland (Oregon) during ...Citation -
430. [Article] Developing and Calibrating the Hydrodynamic and Water Quality Model CE-QUAL-W2 for Banks Lake Washington
Located in central Washington State, Banks Lake serves as an irrigation storage reservoir for the Columbia Basin Irrigation Project and is home to a diverse fisheries population. The current hydrologic ...Citation -
Within the Upper Klamath Basin, Oregon, the native status of anadromous salmonids (Oncorhynchus spp.) has been a long standing question. Ongoing efforts to establish if these fish were native to the region ...
Citation -
Freshwater ecosystems are subject to a wide variety of stressors, which can have complex interactions and result in ecological surprises. Non-native fish introductions have drastically reduced the number ...
Citation -
Thirty three species of ammonites are recorded from the composite type section of the Weberg Member of the Snowshoe Formation in the Suplee area, Grant County, Oregon. Holcophylloceras burkei, Euhoploceras ...
Citation -
434. [Article] Propagule Pressure and Disturbance Drive the Spread of an Invasive Grass, Brachypodium sylvaticum
The invasibility, or susceptibility of an ecosystem to biological invasion is influenced by changes in biotic and abiotic resistance often due to shifts in disturbance regime. The magnitude of invasive ...Citation -
435. [Article] Bird use of revetted riverbanks in the Willamette Valley
Over 115 miles of rock revetments that serve to protect river banks have been constructed in the Willamette Basin. In this study the spring and summer bird use of Willamette Basin revetments is examined. ...Citation -
436. [Article] Predator Exclosures, Predator Removal, and Habitat Improvement Increase Nest Success of Snowy Plovers in Oregon, USA
Management to increase reproductive success is commonly used to aid recovery of threatened and endangered species. The Western Snowy Plover (Charadrius nivosus nivosus) breeds from coastal Washington, ...Citation -
The Chehalis River Basin is located in the southwest region of Washington and is over 125 miles long flowing through agricultural, residential, industrial, and forest land. Four major rivers, many smaller ...
Citation -
438. [Article] Forest Management Scenarios in a Changing Climate: Trade-Offs Between Carbon, Timber, and Old Forest
Balancing economic, ecological, and social values has long been a challenge in the forests of the Pacific Northwest, where conflict over timber harvest and old-growth habitat on public lands has been contentious ...Citation -
We report results of a study that made reciprocal comparisons of environmental DNA (eDNA) assays for two major invasive crayfishes between their disparate invasive ranges in North America. Specifically, ...
Citation -
440. [Article] Analysis of ferredoxin and flavodoxin in Anabaena and Trichodesmium using fast protein liquid chromatography
Iron is an essential nutrient for growth of photosynthetic microorganisms such as cyanobacteria and algae. Iron is required for proteins involved in the important processes of carbon and nitrogen assimilation. ...Citation -
441. [Article] Ecological Investigations to Select Mitigation Options to Reduce Vehicle-Caused Mortality of a Threatened Butterfly
Whereas roads that bisect habitat are known to decrease population size through animal-vehicle collisions or interruption of key life history events, it is not always obvious how to reduce such impacts, ...Citation -
442. [Article] Nesting Microhabitat Use by a Ground-nesting Songbird: Strict Preferences or Random Choice?
Nest site choice of birds has the potential to affect predation rates on nests and reproductive success for many bird species, and is thus tied closely to fitness. Vegetation at a particular site influences ...Citation -
443. [Article] Intestinal Microbiota Diversity of Pre-Smolt Steelhead (Oncorhynchus mykiss) Across Six Oregon and Washington Hatcheries
The Pacific Northwest is known for its once-abundant wild salmonid populations that have been in decline for more than 50 years due to habitat destruction and commercial overexploitation. To compensate, ...Citation -
Landscape structure and biotic interactions are closely linked. We identify five aspects of landscape structure that contribute to the co-occurrence of species and restrict or enable different types of ...
Citation -
445. [Article] Winter Diet of Bobolink, a Long-Distance Migratory Grassland Bird, Inferred from Feather Isotopes
Effective conservation of migratory bird populations depends on advancements in our understanding of processes throughout the life cycle. Fundamental information about wintering ecology (e.g., habitat ...Citation -
The marine environment is comprised of numerous divergent organisms living under similar selective pressures, often resulting in the evolution of convergent structures such as the fusiform body shape of ...
Citation -
In the early 1970s, Sulfolobus was first isolated by Thomas Brock and co-workers from sulfur-rich acidic hot springs in Yellowstone National Park. Sulfolobus became one of the model organisms of Archaea ...
Citation -
448. [Article] Metagenomes from High-Temperature Chemotrophic Systems Reveal Geochemical Controls on Microbial Community Structure and Function
The Yellowstone caldera contains the most numerous and diverse geothermal systems on Earth, yielding an extensive array of unique high-temperature environments that host a variety of deeply-rooted and ...Citation -
449. [Article] Consequences of Mycorrhizal Colonization for Piriqueta Morphotypes under Drought Stress
Field and greenhouse studies have shown that arbuscular mycorrhizal fungi (AMF) can improve plant growth in environments with restricted water availability. The benefits of AMF symbiosis vary among plant ...Citation -
450. [Article] Residential Edges as Ecological Traps: Postfledgling Survival of a Ground-Nesting Passerine in a Forested Urban Park
Substantial offspring mortality can occur during the postfledging period of birds, but few postfledging survival studies have been conducted within the context of habitat suitability. We conducted a 2-year ...Citation -
451. [Article] Avian population trends within the evolving agricultural landscape of the eastern and central United States
State-level Breeding Bird Survey (1980-1998) and U.S. Department of Agriculture statistics were used to test the hypothesis that changes in agricultural land use within the eastern and central U.S. have ...Citation -
452. [Article] The Impact of Weather on Kingbird Foraging Behavior
Foraging data on Eastern Kingbirds (Tyrannus tyrannus) were collected during the early breeding season in eastern Kansas to test the hypothesis that foraging rate and other aspects of foraging behavior ...Citation -
Many agencies in the USA are developing management approaches to address water quality concerns and threatened and endangered species habitat requirements in water bodies. Many of these water bodies are ...
Citation -
454. [Article] Impacts of Columbia River Discharge on Salmonid Habitat: 1. A Nonstationary Fluvial Tide Model
This is the first part of a two-part investigation that applies nonstationary time series analysis methods and the St. Venant equations to the problem of understanding juvenile salmonid access to favorable ...Citation -
455. [Article] Impacts of Columbia River Discharge on Salmonid Habitat: 2. Changes in Shallow-Water Habitat
This is the second part of an investigation that analyzes human alteration of shallow-water habitat (SWH) available to juvenile salmonids in the tidal Lower Columbia River. Part 2 develops a one-dimensional, ...Citation -
456. [Article] Factors for Improved Fish Passage Waterway Construction
Streambeds are important fish passageways in Oregon; they provide for the necessary habitats and spawning cycles of a healthy fish population. Oregon state law requires that hydraulic structures located ...Citation -
457. [Article] Road Ecology Course and Seminar Series
The American road network is a major economic investment that is a major organizing force for human activity. The road system has profoundly altered ecological processes and, as a result, it is also an ...Citation -
458. [Article] Where Have All the Native Fish Gone? The Fate of Fish that Lewis and Clark Encountered on the Lower Columbia River
As part of a special issue of the 'Oregon Historical Quarterly,' discusses the native species of fish in the lower Columbia River described by Meriwether Lewis and William Clark in 1805-06. They identified ...Citation -
Archaeological data on the long history of interaction between indigenous people and salmon have rarely been applied to conservation management. When joined with ethnohistoric records, archaeology provides ...
Citation -
460. [Article] Habitat and Distribution of the Ruffed Lemur, "Varecia", North of the Bay of Antongil in Northeastern Madagascar
Here we present information on the conservation status of ruffed lemurs (Varecia) north of the Bay of Antongil in northeastern Madagascar. Two contiguous protected areas were recently established that ...Citation -
461. [Article] Northwest Forest Plan The First 20 Years (1994-2013): Watershed Condition Status and Trend
We used two data sets to evaluate stream and upslope/riparian condition for sixth-field watersheds in each aquatic province within the Northwest Forest Plan (NWFP) area. The stream evaluation was based ...Citation -
462. [Article] Planning in the Portland Metropolitan Area after Measure 37
Created in the aftermath of Measure 37, the Russill Fellowship is aimed at examining non-regulatory land use planning tools and their potential application in the Portland Metropolitan area, with a particular ...Citation -
463. [Article] Mitigating the impacts of Measure 37 : implementing a statewide transferable development rights program in Oregon
Nonregulatory land use planning tools can be effective for achieving statewide planning goals, but only in a regulatory context. Measure 37 makes that regulatory context problematic, with planners’ flexibility ...Citation -
464. [Article] Osmosis Alive – Algae Water Filtration System
Goals: Our goals of this project was to: Obtain an energy efficient, self-sufficient system to help reduce waste and money, and reuse and recycle water. To have a successful, natural, and more self-sufficient ...Citation -
Marine bioeroders, borers, and burrowers can have drastic effects to marine habitats and facilities. By physically altering the structure of marine habitats, these organisms may elicit ecosystem-level ...
Citation -
Speciation is the process by which life diversifies into discrete forms, and understanding its underlying mechanisms remains a primary focus for biologists. Increasingly, empirical studies are helping ...
Citation -
467. [Article] The Impact of Fine Sediment on Stream Macroinvertebrates in Urban and Rural Oregon Streams
Urbanization, often characterized by high impervious surface area, can result in excessive inputs of fine sediments into urban streams. Excessive fine sediments can blanket the stream bed filling the interstitial ...Citation -
Invasive species degrade ecosystems by altering natural processes and decreasing the abundance and diversity of native flora. Communities with major fluctuations in resource supply allow invasive species ...
Citation -
469. [Article] Ecology of White-Cheeked Crested Gibbons in Laos
The endangered white-cheeked crested gibbon (Nomascus leucogenys), native to Laos, Vietnam, and perhaps China, remains little known and highly threatened. I studied seasonal variation in the diet, activity ...Citation -
The risk of spread and establishment of invasive species to interior habitat within urban parks is of great concern to park managers and ecologists. Informal trails as a vector for this transmission are ...
Citation -
African savanna elephants (Loxodonta africana) and Asian elephants (Elephas maximus) are a focus of welfare research in zoos due to their high intelligence, complex social structure, and sheer size. Due ...
Citation -
472. [Article] Understory Diversity and Succession on Coarse Woody Debris in a Coastal, Old-growth Forest, Oregon
This research examines the relationship between understory plant diversity and logs in a Pacific Northwest (PNW) Sitka spruce (Picea sitchensis)-western hemlock (Tsuga heterophylla) old-growth, coastal ...Citation -
There is a considerable amount of unpublished source material on Kalapuyan ethnography. This consists primarily of manuscript field notes from three linguistically trained scholars: Albert S. Gatschet, ...
Citation -
474. [Article] Characterization of the Shallow Subsurface Geohydrology of the Ni-les'tun Unit on the Bandon Marsh National Wildlife Refuge
The Bandon Marsh is a large marsh restoration project located in southwest Oregon. The land has been previously used for dairy farms and much of the marsh was used for cattle grazing. The goal of the restoration ...Citation -
475. [Article] Development of a Steady-State River Hydrodynamic and Temperature Model Based on CE-QUAL-W2
CE-QUAL-W2 is a 2-D hydrodynamic and water quality model that has been applied to reservoirs, lakes, river systems, and estuaries throughout the world. However, when this model is applied for shallow systems, ...Citation -
The nutria (Myocastor coypus) is a semi-aquatic rodent native to South America that was introduced to the Pacific Northwest, USA, in the 1930s. Primary damage categories from this invasive species include ...
Citation -
The air-water interface is an important natural boundary layer that has been neglected as an area of environmental field research. This study establishes that comparative microscopy can be an effective ...
Citation -
478. [Article] Site Selection by Migratory Shorebirds in Oregon Estuaries Over Broad and Fine Spatial Scales
Many migratory shorebirds rely on estuaries as stop-over sites to refuel during migration, and the loss of stop-over sites is a primary threat to shorebird populations on the West Coast of the United States ...Citation -
479. [Article] A taxonomic study of the marine algae of Netarts Bay, Oregon
Gathering taxonomic data is fundamental to any biological or ecological research. It was the intent of this paper to increase the storehouse of taxonomic information by studying the marine algae of one ...Citation -
480. [Article] Chronology and Ecology of Late Pleistocene Megafauna in the Northern Willamette Valley, Oregon
This study is an investigation of the timing of extinction of late Pleistocene, large bodied mammalian herbivores (megafauna) and of the environment in which they lived. The demise of the megafauna near ...Citation -
481. [Article] A biogeographical study of currently identified Oregon pseudoscorpions with an emphasis on western Oregon forms
The biogeography of the 50 currently identified Oregon species is reported from analyses of data from 2220 Berlese samples collected in a stratified, extensive sampling procedure, and from collection data ...Citation -
482. [Article] Postfledging Survival and Habitat Use of Spotted Towhees (Pipilo maculatus) in an Urban Park
Habitat fragmentation, and the resulting increase in edge habitat, has important effects on birds, including the increased probability of nest predation, changes in habitat structure, and the increased ...Citation -
This study is a gendered analysis of natural resource management at the local scale of a poor rural Sri Lankan village in a conservation buffer zone. This village experiences destruction of forests and ...
Citation -
The subsurface igneous biome contains a vast portion of Earth's total biomass, yet we still know so little about it. Igneous environments such as iron-rich ocean crust and lava tubes may also host analogs ...
Citation -
485. [Article] The red-tailed hawk on Sauvie Island, Oregon
A study was undertaken to determine the abundance, distribution, perching heights, diets and territory sizes of Red-Tailed Hawks on Sauvie Island, Oregon. Sauvie Island supported a large wintering population ...Citation -
In order to complete their life cycles, vertebrates require oxygen and water. However, environments are not always forgiving when it comes to constantly providing these basic needs for vertebrate life. ...
Citation -
487. [Article] Modeling the Distribution of Bobcats and Areas of Reintroduction for Fisher in the Southern Washington Cascades
The fisher (Martes pennanti) is a medium sized member of the mustelid family that once roamed the forests of Washington and whose historic range in the western United States once spread throughout the ...Citation -
Survivorship (the likelihood of survival from one year to the next) and breeding dispersal (movement between breeding seasons) exhibit considerable variability at both the inter- and intraspecific levels. ...
Citation -
489. [Article] Mechanisms of Adaptation in the Newly Invasive Species <i>Brachypodium sylvaticum</i> (Hudson) Beauv.
It is common knowledge that invasive species cause worldwide ecological and economic damage, and are nearly impossible to eradicate. However, upon introduction to a novel environment, alien species should ...Citation -
Understanding the maintenance of sexual systems is of great interest to evolutionary and ecological biologists because plant systems are extremely varied. Plant sexual systems have evolved to include not ...
Citation -
Native plants still play an important part in the lives of some American Indians. This thesis describes recent foraging practices which persist among the Harney Valley Paiute, a group of Northern Paiute ...
Citation -
Crypsis can be an important mechanism of predator avoidance for organisms. However, many species exhibit sexual dichromatism, in which the males possess a suite of colorations in order to attract female ...
Citation -
Populations of diurnal tree squirrels in the Portland area were located by mail surveys, personal interviews, and field inspections. Pine squirrels were found to reside in thickly wooded residential areas ...
Citation -
494. [Article] Effects of Selective Logging and Roads on Instream Fine Sediments and Macroinvertebrate Assemblages in the Clackamas Basin, Oregon
Logging and associated skid trails, haul routes, and roads can have significant impacts on the magnitude and timing of sediments in streams in forested watersheds. Loss of vegetation, soil compaction, ...Citation -
495. [Article] Using Landsat TM Imagery to Monitor Vegetation Change Following Flow Restoration to the Lower Owens River, California
Rehabilitating river corridors to restore valuable riparian habitat consumes significant resources from both governments and private companies. Given these considerable expenditures, it is important to ...Citation -
Coyote food habits were ascertained by identifying the undigested material in 1143 scats collected at monthly intervals from specific road transects on the USERDA Hanford Reservation in Washington from ...
Citation -
Various physical and biological factors affecting annual productivity in a Red-tailed Hawk population in north-central Oregon were investigated. The percentage of the population successfully fledging one ...
Citation -
498. [Article] The Role of Habitat Restoration and Conservation in the Changing Socio-economic Conditions of Grant County, Oregon
Habitat restoration has socio-economic as well as biophysical impacts. In Grant County, Oregon a recent influx of funding and technical resources for habitat restoration has led to focused monitoring efforts ...Citation -
499. [Article] Population Structure of Island-Associated Pantropical Spotted Dolphins (Stenella attenuata) in Hawaiian Waters
Understanding gene flow, diversity, and dispersal patterns is important for predicting effects of natural events and anthropogenic activities on dolphin populations. With the very recent exceptions of ...Citation -
500. [Article] Oxygen Demand Trends, Land Cover Change, and Water Quality Management for an Urbanizing Oregon Watershed
In-stream aquatic habitat depends on adequate levels of dissolved oxygen. Human alteration of the landscape has an extensive influence on the biogeochemical processes that drive oxygen cycling in streams. ...Citation