Search
You searched for:
Start Over
Wildlife refuges
Remove constraint Wildlife refuges
Database
PDX Scholar
Remove constraint Database: PDX Scholar
« Previous | 1 - 20 of 24 | Next »
Search Results
-
1. [Article] The Landscape: Sauvie Island
A brief overview of the geography, history and outlook for Sauvie Island, an area situated at the confluence of the Willamette and Columbia Rivers that is important as a wildlife refuge, farming areas, ...Citation -
2. [Article] Wet Meadow Plant Associations, Double O Unit, Malheur National Wildlife Refuge, Harney County, Oregon
This report summarizes vegetation data collected in July 2015 in wet meadow and marshy habitats on the Double O Unit of Malheur National Wildlife Refuge (MNWR). Because vegetation sampled at the Double ...Citation -
3. [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 -
In July 2012, we sampled 131 plots in wet meadow habitat at the southern end of the Malheur National Wildlife Refuge. Analysis of the data identified eleven different plant associations: Alopecurus pratensis, ...
Citation -
5. [Article] Influence of Wetland Landscape Structure on Duck Nest Success at Malheur National Wildlife Refuge, Oregon
The decline of waterfowl populations and their requisite wetland habitats remains a concern. Because migratory bird refuges are often artificial landscapes of actively managed wetlands, and wildlife populations ...Citation -
6. [Article] A Survey for Leucocytozoon Simondi Mathis and Leger (1910) in Canada Geese of the Malheur Wildlife Refuge
Blood smears of blood collected in 1971 and 1972 from 291 Canada geese at Malheur National Wildlife Refuge were examined to determine the incidence of the avian malarial parasite, Leucocytozoon simondi. ...Citation -
Common Ravens (Corvus corax L.) have been implicated as significant predators on the eggs of waterfowl and shorebirds on Malheur National Wildlife Refuge. Malheur Refuge, located in southeastern Oregon ...
Citation -
8. [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 -
Archaeological investigations at site 45CL1, Clark County, Washington, demonstrate that the locality is a very large (c 1.5ha), deeply stratified (2-4m) town site with an occupation spanning at least 1000 ...
Citation -
The reuse of old nests by open-cup nesting passerines is a seemingly rare but potentially adaptive behavior if, as a consequence, females begin to breed earlier, lay larger clutches, or fledge more young. ...
Citation -
This study compared two remote sensing water indices: the Normalized Difference Water Index (NDWI) and the Modified NDWI (MNDWI). Both indices were calculated using publically-available data from the Landsat ...
Citation -
12. [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 -
13. [Article] Finding and Dating Cathlapotle
The people of the Cathlapotle town played a significant role in the fur trade era history of the Lower Columbia River, including Lewis and Clark’s visit on March 29th, 1806. Archaeologists and others have ...Citation -
14. [Article] Functional analysis of Great Basin projectile points
This paper presents a refined methodology for distinguishing the stone points of arrows from the stone points of spear thrower darts in archaeological assemblages from the Great Basin. The methodology ...Citation -
15. [Article] Avian Affairs: A Study of the Occurrence and Benefits of Extra-pair Breeding Behavior in Eastern Kingbirds (Tyrannus Tyrannus)
Over three consecutive breeding seasons I examined the breeding system of Eastern Kingbirds in Malheur National Wildlife Refuge in SE, Oregon. To assess genetic paternity, I optimized seven microsatellite ...Citation -
16. [Article] Lambda Alpha Anthropology Honors Society (LAB): Bridging The Gap Between Coursework And Career
Many anthropology majors gain an academic familiarity with the subject through coursework, but lack an understanding of how to utilize their anthropological skills outside of academia in future careers. ...Citation -
17. [Article] Experimental Analysis of Nest-Site Choice and its Relationship to Nest Success in an Open-Cup–Nesting Passerine
Nest placement presumably reflects selection for secure sites to minimize failure. Most tests of this hypothesis, however, have failed to support it. We used artificial nests (ARTs) to experimentally evaluate ...Citation -
Estuarine intertidal habitats are heterogeneous, therefore migratory shorebirds are expected to forage in microhabitats where they can maximize their energy intake. Identifying proximate factors that migratory ...
Citation -
19. [Article] Canada’s New Role in North American Energy Security
Energy analysts have given renewed attention to Canada's position in the North American energy market since the September 11th attacks, because of fear that conflict might interrupt the flow of oil from ...Citation -
There is an increasing demand for assessing ecosystem functions for freshwater wetlands, especially when comparing or prioritizing among wetlands at the watershed scale. We estimated the relative potential ...
Citation