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Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
How Beavers (Castor Canadensis) Affect Habitat Availability For Two Native Oregon Turtles: Actinemys Marmorata And Chrysemys Picta Bellii, Rodé Krige
University Honors Theses
Oregon is home to two native freshwater turtle species: the northwestern pond turtle and the western painted turtle. Both turtles are Oregon conservation strategy species with a status rating of sensitive, indicating declining populations. Oregon’s decline in these turtle’s populations is thought to be predominantly due to loss and degradation of habitat that results from development and urbanization. Beavers’ ability to dam streams and create ponds may be creating habitat usable by turtles, but the relationship is under-studied. This study assessed water temperature, basking habitat, and overall turtle habitat suitability at beaver-dammed and control ponds in Portland, Oregon. Average basking …
The Effects Of Salt Marsh Restoration On The Hydrology Of Salt Marsh Channels, Isis Kontas
The Effects Of Salt Marsh Restoration On The Hydrology Of Salt Marsh Channels, Isis Kontas
University Honors Theses
Salt marshes produce many ecosystem services, from water purification to protection from hurricanes. Despite their benefits, salt marshes have been impacted negatively by human activities. There are many salt marsh restoration projects that intend to bring back all ecological functions and services. Quantifiable measurements are needed to evaluate the effectiveness of such restoration efforts. Earlier work by Reagan Thomas demonstrated what happens to the hydrology of salt marsh channels when they are adjacent to restored salt marshes. This study builds on Thomas’ work and uses the sinuosity of channels as a quantitative, representative metric of salt marsh hydrology restoration effectiveness. …
Microplastics Presence In Rhizophora Mangle Roots Throughout Fishponds And Open Coasts In Moloka'i, Hawaii, Mia Hackett
Microplastics Presence In Rhizophora Mangle Roots Throughout Fishponds And Open Coasts In Moloka'i, Hawaii, Mia Hackett
University Honors Theses
Microplastics (MP) are an emerging global contaminant that has drawn the attention of many researchers in the last few decades due to their growing environmental threats. Pieces of plastic smaller than 5 mm, they are specifically a high cause for concern in marine environments as their small size allows them to flow from inland into the ocean. Through this movement, MPs have been found in all marine ecosystems and ingested by hundreds of marine species often mistaking them for food. Labeled as one of the most threatened ecosystems, mangrove forests are already a large sink for a variety of contaminants …
Exploring The Relationship Between Green Space And Academic Performance, Audrey Demeaux
Exploring The Relationship Between Green Space And Academic Performance, Audrey Demeaux
University Honors Theses
A growing body of literature is exploring the possibility that the presence of green spaces near schools can work to improve academic performance. Research to date on the relationship between green space and academic performance has shown mixed results. However, some see incorporating green spaces into school layouts as a key alternative strategy for improving academic achievement in the United States. This paper adds to the emerging discourse on the relationship between green space and academic achievement by using open-source data to conduct a regression analysis exploring the possible relationship between green space near K-12 schools and SAT scores in …
Pfas In News Media: A Quantitative And Qualitative Analysis, Madison Haley
Pfas In News Media: A Quantitative And Qualitative Analysis, Madison Haley
University Honors Theses
News media analysis allows for a greater understanding of mainstream public concerns throughout time. The history of US news articles covering per- and polyfluoroalkyl substances (PFAS), a class of chemicals posing increasing threats to public health and the environment, demonstrates Americans' awareness and perceptions of these chemicals over time. Based on the quantitative and qualitative analyses of PFAS-related national news articles in 2012-2022, this study discusses media representations and public perceptions of PFAS during the stated period. Results indicate an over 5700% increase in PFAS-related news articles over the 10-year timespan. Further, thematic analysis reveals that PFAS-related news articles are …