Index Catalog // ScholarsArchive@OSU

Spatial and temporal dynamics of anthropogenically influenced forests of the Brazilian Amazon

Creator:: Bergen, Scott
Abstract:: The Amazon Tropical Rain Forest is the largest tropical rain forest system, comprising approximately 65% of such forests on earth. Since the 1960's, human populations in the Brazilian Amazon have increased from two to over 20 million. Concomitant urbanization, forest conversion, and economic dependence on resource extraction have exerted severe...
Resource Type:: Dissertation

Assessing cumulative influences of watershed-scale landuses on reed canarygrass (Phalaris arundinacea L.) abundance

Creator:: Inahara, Satomi
Abstract:: The West Eugene Wetlands, Eugene, Oregon, which provide habitat for number of endemic and endangered plant species, are currently threatened by a Reed canarygrass (Phalaris arundinacea L.) invasion. This study addresses the hypothesis that Phalaris spread can be explained in part by using watershed-scale landuse patterns as surrogates of the...
Resource Type:: Masters Thesis
Full Text:: Determination of a wetland watershed 24 4.4.3 Characterization of landuse/land cover (LULC) 25 TABLE OF

Urban residents and non-point source pollution : an examination of practices, influences, and values in the Tualatin watershed

Creator:: Nielson, Lisa M.
Abstract:: In July of 2001, the Environmental Protection Agency (EPA) activated the Total Maximum Daily Load (TMDLs) provisions of the Clean Water Act. As the first river in Oregon to implement TMDL regulations, people and agencies in the Tualatin basin face many challenges. Non-point source pollution affects water quality in the...
Resource Type:: Masters Thesis
Full Text:: SWCD Soil and Water Conservation District TMDL Total Maximum Daily Load TRWC Tualatin River Watershed

Land cover change along the Willamette River, Oregon

Creator:: Oetter, Doug Rudolph, 1962-
Abstract:: The Willamette River and its floodplain in northwest Oregon have changed dramatically since European settlement. At one time, the river was a vast complex system of braided channels with a broad floodplain forest; it has now been simplified by channelization and dams, and the forest has been removed to support...
Resource Type:: Dissertation

Seasonal relationships between dissolved nitrogen and landuse/landcover and soil drainage at multiple spatial scales in the Calapooia Watershed, Oregon

Creator:: Floyd, William C.
Abstract:: The Calapooia River, a major tributary of the Willamette River in western Oregon, is a watershed typical of many found in the Willamette Basin. Public and private forested lands occur in the steep Upper Zone of the watershed, mixed forest and agriculture lands are found in the Middle Zone, and...
Resource Type:: Masters Thesis
Full Text:: of the river, with no emphasis on major reach or land use breaks. Preliminary results indicated that

Detecting changes in a wetland : using multi-spectral and temporal Landsat in the Upper Noun Valley Drainage Basin-Cameroon

Creator:: Ndzeidze, Stephen Koghan
Abstract:: Since the early 1980s, satellite imagery has been commonly used to detect change in wetlands. The overall objective of this study is to utilize remote sensing and Geographic Information Systems (GIS) technology to determine the extent of change of the wetland area and of other land use and land cover...
Resource Type:: Masters Thesis
Full Text:: of other land use and land cover classes in the Upper Noun drainage basin from 1973 to 2007

Linkages among land use, riparian zones, and uptake and transformation of nitrate in stream ecosystems

Creator:: Sobota, Daniel J.
Abstract:: Land use alters the physical and biological structure of stream ecosystems and potentially alters their capacity to process nitrogen (N), an essential nutrient that has nearly doubled in abundance on the biosphere during the past century from human activities. In this dissertation, I quantified uptake and transformation of nitrate (NO₃⁻)...
Resource Type:: Dissertation
Full Text:: Table 1. Physiographic setting and land use cover of the nine study reaches in the Willamette River

Dissolved nitrogen in surface waters and nitrogen mineralization in riparian soils within a multi-land use basin

Creator:: Evans, Daniel M.
Abstract:: The growing population of Oregon’s Willamette River Basin places an increasing demand on the basin’s surface waters. Watershed-scale research addressing spatial trends of dissolved nitrogen (DN) and its relationship with landuse and soil N dynamics, such as N mineralization, is sparse in the Willamette Basin. I measured DN along 124...
Resource Type:: Masters Thesis
Full Text:: -basins to the Calapooia River for three years. Relationships between land-use and DN concentrations

A spatially explicit method for determining the effects of watershed scale land use on stream conditions

Creator:: Kehmeier, Jonathan W.
Abstract:: The primary goal of this research was to identify the impacts that individual agricultural land uses have on fish communities in small streams located in the Willamette Valley of western Oregon. The diverse nature of the land use features of the valley provided a challenging but useful system for the...
Resource Type:: Masters Thesis
Full Text:: the Effects of Watershed Scale Land Use on Stream Conditions. Abstract approved: AN ABSTRACT OF THE

Prehistoric Land-Use Patterns in the North Santiam Subbasin, On the Western Slopes of the Oregon Cascade Range

Creator:: Kelly, Cara McCulley
Abstract:: This thesis examines prehistoric land use patterns of the entire North Santiam subbasin, located on the western slopes of the Oregon Cascade Range. The objective of this analysis is three-fold: 1) to contribute to reconstructing the cultural chronology of the area; 2) to address the use of raw material by...
Resource Type:: Masters Thesis
Full Text:: Prehistoric land-use patterns in the North Santiam subbasin on

ScholarsArchive@OSU

Spatial and temporal dynamics of anthropogenically influenced forests of the Brazilian Amazon

Assessing cumulative influences of watershed-scale landuses on reed canarygrass (Phalaris arundinacea L.) abundance

Urban residents and non-point source pollution : an examination of practices, influences, and values in the Tualatin watershed

Land cover change along the Willamette River, Oregon

Seasonal relationships between dissolved nitrogen and landuse/landcover and soil drainage at multiple spatial scales in the Calapooia Watershed, Oregon

Detecting changes in a wetland : using multi-spectral and temporal Landsat in the Upper Noun Valley Drainage Basin-Cameroon

Linkages among land use, riparian zones, and uptake and transformation of nitrate in stream ecosystems

Dissolved nitrogen in surface waters and nitrogen mineralization in riparian soils within a multi-land use basin

A spatially explicit method for determining the effects of watershed scale land use on stream conditions

Prehistoric Land-Use Patterns in the North Santiam Subbasin, On the Western Slopes of the Oregon Cascade Range

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