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Articles 601 - 630 of 2456
Full-Text Articles in Physical Sciences and Mathematics
Structural History Of The Formidable-Le Conte Mountain Area, North Cascades, Wa, Nyle Weldon
Structural History Of The Formidable-Le Conte Mountain Area, North Cascades, Wa, Nyle Weldon
WWU Graduate School Collection
A record of Permian to Tertiary polyphase deformation, metamorphism and magmatism is preserved in the Cascades River region of the North Cascades Crystalline Core, Washington. The tectonic history recorded here can be used to understand the deep crustal processes occurring within active convergent plate margins around the world. New structural and geochronologic data from this study are used to advance our understanding of terrane origin, accretion, and processes that altered and thickened the crust of the North Cascades.
The study focuses on several rock units within an accreted Permian-Jurassic island arc, the Chelan Mountains terrane, that was tectonized in Cretaceous …
Off-Channel Habitat Restoration Using Groundwater Infiltration Galleries In The Methow River Basin, Washington, Nicole Masurat
Off-Channel Habitat Restoration Using Groundwater Infiltration Galleries In The Methow River Basin, Washington, Nicole Masurat
WWU Graduate School Collection
Anthropogenic development in river floodplains has diminished the extent groundwater and surface water interact. This interaction plays an important role in the formation of floodplain habitats that provide essential refuge for stream biota when extreme seasonal conditions arise. To address the need for more off-channel habitat in the floodplain, a novel strategy of habitat construction was implemented by the Yakama Nation in the Methow River Basin. At two locations, groundwater infiltration galleries were installed in relic side channels disconnected from the mainstem by infrastructure. These installations collect subsurface flow and drain it to excavated channels connected to the mainstem channel …
Using Crystal Zoning, Thermobarometry, And Melts To Elucidate Koma Kulshan’S (Mt. Baker) Transcrustal Magma Storage System, Northern Cascade Arc, Brendan Garvey
Using Crystal Zoning, Thermobarometry, And Melts To Elucidate Koma Kulshan’S (Mt. Baker) Transcrustal Magma Storage System, Northern Cascade Arc, Brendan Garvey
WWU Graduate School Collection
Koma Kulshan (Mt. Baker) is classified as a high-threat volcano due to its past eruptive history and its proximity to populations, yet its eruptive products are understudied. Combining mineral chemistry from complexly zoned crystals with thermobarometry and thermodynamic modeling (MELTS) is a powerful way to provide constraints on magmatic processes beneath an active volcano. Up to four populations each of pyroxene, plagioclase, and olivine occur as phenocrysts and crystal clusters in the youngest (9.8 ka) lava flow at Koma Kulshan and represent four co-crystallizing assemblages derived from distinct magmas. These co-crystallizing assemblages are defined by petrologic observations and mineral chemistry …
Eruption Evolution Of West Mata Volcano, Ne Lau Basin Using Hydroacoustic And Video Data, Mikkel Shanice Louis
Eruption Evolution Of West Mata Volcano, Ne Lau Basin Using Hydroacoustic And Video Data, Mikkel Shanice Louis
WWU Graduate School Collection
West Mata Volcano located in the NE Lau Basin is the site of the deepest observed submarine volcanic eruption, 1,200 meters below sea level. In May 2009, a research cruise collected video data of two eruptive vents showcasing different eruption styles. During the same research cruise, a BprobeTM portable hydrophone was deployed at the summit of West Mata and collected data that coincides with video recorded at the vents during ROV dives. These data sets were correlated to better understand the spectral signatures associated with the two eruptive vents. Both vents were near the summit, about 50 meters apart, …
Responses Of The Symbiotic Sea Anemone Anthopleura Elegantissima To Microplastics, Robert Beck
Responses Of The Symbiotic Sea Anemone Anthopleura Elegantissima To Microplastics, Robert Beck
WWU Graduate School Collection
The Salish Sea, a large and complex fjord estuary, receives waters impacted by a watershed that includes 8 million people aggregated in several large urban and industrial centers. Microplastics, defined as plastic particles less than 5 mm in their largest dimension, are transported from this watershed into the Salish Sea where they are easily ingested by filter feeders, herbivores and predators. To measure effects of microplastics on one common and important intertidal species, we exposed the sea anemone Anthopleura elegantissima to polyester microfibers at concentrations of 0, 0.01, or 0.1 g/L in the laboratory and measured the responses of the …
Ecological Risk Assessment Of Tire Wear Particles In The San Francisco Bay Using A Bayesian Network Relative Risk Model, Emma E. Sharpe
Ecological Risk Assessment Of Tire Wear Particles In The San Francisco Bay Using A Bayesian Network Relative Risk Model, Emma E. Sharpe
WWU Graduate School Collection
Here we present an ecological risk assessment for a specific type of microplastic in the San Francisco Bay. There has been an increased interest in understanding and managing the impacts that microplastics may have on ecological systems because recent studies have shown that plastic particles are widespread in the environment and that exposure to these particles has toxicological effects. Until now, an ecological risk assessment for microplastics that meets the current standards for risk assessment, has not been completed. This study lays the groundwork for future ecological risk assessments of microplastics and identifies key uncertainties that need to be addressed. …
Living In Pele's Workshop: Using Community-Informed Planning To Address Housing Needs In Puna, Hawai'i, Taylor Webb
Living In Pele's Workshop: Using Community-Informed Planning To Address Housing Needs In Puna, Hawai'i, Taylor Webb
WWU Graduate School Collection
The purpose of this research project is to understand the ways in which the current land use regulations in Puna, Hawai’i have impacted accessibility to a variety of affordable housing forms. The 2018 Kīlauea eruption and COVID-19 pandemic have exacerbated issues in the community that were already prevalent in the area including rising housing costs, lack of housing options, and insufficient infrastructure and access to essential services. As more people continue to move into the Puna District, these issues are becoming intensified. With these complexities in mind, I utilized a mixed-method research approach to study both the physical and social …
Using Frog Embryo Teratogenesis Assay-Xenopus Laevis (Fetax) To Study Metals And Temperature As Multiple Stressors In Cascades Frog (Rana Cascadae), Adam Turner (Cockrill) Crispin
Using Frog Embryo Teratogenesis Assay-Xenopus Laevis (Fetax) To Study Metals And Temperature As Multiple Stressors In Cascades Frog (Rana Cascadae), Adam Turner (Cockrill) Crispin
WWU Graduate School Collection
Amphibian populations have been declining globally since at least the 1970s. In the western United States, disappearances have resulted in significant range contractions due to habitat loss, climate change, predation by non-native species, pesticide use, and disease, most recently by the fungal pathogen, Batrachochytrium dendrobatidis. Several recent studies have addressed amphibian population declines due to climate change, yet few studies have examined the interacting effects of climate change and metal contaminants as they relate to amphibians. Risks may be especially pronounced in amphibians that reside in high-alpine aquatic ecosystems, such as the Cascades frog (Rana cascadae), which may be affected …
Avian And Shallow Water Community Response To Pacific Herring (Clupea Pallasii) Spawn Events, Heidi Stewart
Avian And Shallow Water Community Response To Pacific Herring (Clupea Pallasii) Spawn Events, Heidi Stewart
WWU Graduate School Collection
Pacific Herring play a critical role in the food web of the Salish Sea. The Cherry Point stock, centered 30 miles north of Bellingham Bay, has declined roughly 97% since the 1970s. This massive decline is a point of concern for environmental and fishery managers and has led to research into both the initial decline and the stock’s inability to recover. One key data gap in need of research is whether the Cherry Point herring stock is experiencing increased predation from the nearshore fish, bird, and invertebrate community due to its unique late spawn timing and spawning behavior. To that …
Species Distribution And Abundance Of Bering Sea Tunicates With Implications For Coastal Food Security, Meghan Bugaj
Species Distribution And Abundance Of Bering Sea Tunicates With Implications For Coastal Food Security, Meghan Bugaj
WWU Graduate School Collection
The use of sessile macroinvertebrates as leading indicators of change in marine ecosystems makes them potentially valuable as a management tool for predicting habitat suitability for more mobile, commercially important fishes. In addition to potential use as an ecosystem indicator in fisheries management, tunicates are used as a food resource by some Alaska Native communities. Variability in abundance and distribution, driven by changing physical conditions in the Bering Sea, could impact food security for these communities. I used fishery-independent NOAA survey data from the Eastern Bering Sea summer surveys from 1987 to 2019 to examine abundance and distribution of several …
Modeling 21st Century Peak Streamflows In The Stillaguamish Watershed Using Dynamically Downscaled General Circulation Model Projections, James Marcell Robinson
Modeling 21st Century Peak Streamflows In The Stillaguamish Watershed Using Dynamically Downscaled General Circulation Model Projections, James Marcell Robinson
WWU Graduate School Collection
Climate change is projected to increase river flooding in the Puget Sound region of Washington State by reducing snowpack and yielding more intense storm events. Pairing meteorological forcings from general circulation models (GCMs) with a physically based hydrologic model is a robust method of assessing watershed response to projected climate. Before GCM forcings can be applied to regional hydrologic models, some form of downscaling or regionalization is required. Dynamical downscaling is a means of incorporating mesoscale atmospheric processes within GCM-informed boundary conditions. Here I apply climate projections, dynamically downscaled using the Weather Research and Forecasting model (WRF), to the Stillaguamish …
The Photochemical Evolution Of Dissolved Black Carbon In Snow: A Case Study From The North Cascades, Molly Peek
The Photochemical Evolution Of Dissolved Black Carbon In Snow: A Case Study From The North Cascades, Molly Peek
WWU Graduate School Collection
Black carbon (BC) is partially combusted organic material from natural and anthropogenic sources, and is a highly effective driver of melt in the cryosphere. BC has been found in both populated and remote areas around the globe. This study follows the evolution of UV-exposed dissolved BC (DBC) in the cryosphere using the Benzenepolycarboxylic Acid (BPCA) markers B4CA, B5CA, and B6CA. Samples were collected from Mount Baker, Washington, and from both an in situ field study and a controlled photodegradation study, both using natural and anthropogenic BC standards. Both natural and experimental samples had a dominance of B5CA relative to other …
Summary Of Lake Whatcom Algal Research, 1987–2021, Robin A. Matthews
Summary Of Lake Whatcom Algal Research, 1987–2021, Robin A. Matthews
A Collection of Open Access Books and Monographs
The purpose of this report is to provide a brief description of the major algal taxonomy projects completed in Lake Whatcom and to create a digital image library of many of the taxa1 reported from the lake from 1987–2017. A simple taxonomic key is also included for students and citizen scientists who would like to develop their algal identification skills.
Eight taxonomy projects and hundreds of digital images were used to develop the Lake Whatcom algal species list and distribution summary. The eight projects were conducted between 1987 and 2017 and included identification of algal taxa to at least the …
Physics Inventory Of Quantitative Literacy: A Tool For Assessing Mathematical Reasoning In Introductory Physics, Suzanne W. Brahmia, Alexis Olsho, Trevor I. Smith, Andrew Boudreaux, Philip Eaton, Charlotte Zimmerman
Physics Inventory Of Quantitative Literacy: A Tool For Assessing Mathematical Reasoning In Introductory Physics, Suzanne W. Brahmia, Alexis Olsho, Trevor I. Smith, Andrew Boudreaux, Philip Eaton, Charlotte Zimmerman
Physics & Astronomy
One desired outcome of introductory physics instruction is that students will develop facility with reasoning quantitatively about physical phenomena. Little research has been done regarding how students develop the algebraic concepts and skills involved in reasoning productively about physics quantities, which is different from either understanding of physics concepts or problem-solving abilities. We introduce the Physics Inventory of Quantitative Literacy (PIQL) as a tool for measuring Quantitative Literacy, a foundation of mathematical reasoning, in the context of introductory physics. We present the development of the PIQL and evidence of its validity for use in calculus-based introductory physics courses. Unlike …
Metamorphism Of The Sierra De Maz And Implications For The Tectonic Evolution Of The Mara Terrane, Andrew Tholt, Sean R. Mulcahy, William C. Mcclelland, Sarah M. Roeske, Vinícius T. Meira, Patricia Webber, Emily Houlihan, Matthew A. Coble, Jeffrey D. Vervoort
Metamorphism Of The Sierra De Maz And Implications For The Tectonic Evolution Of The Mara Terrane, Andrew Tholt, Sean R. Mulcahy, William C. Mcclelland, Sarah M. Roeske, Vinícius T. Meira, Patricia Webber, Emily Houlihan, Matthew A. Coble, Jeffrey D. Vervoort
Geology Faculty Publications
The Mesoproterozoic MARA terrane of western South America is a composite igneous-metamorphic complex that is important for Paleozoic paleogeographic reconstructions and the relative positions of Laurentia and Gondwana. The magmatic and detrital records of the MARA terrane are consistent with a Laurentian origin; however, the metamorphic and deformation records lack sufficient detail to constrain the correlation of units within the MARA terrane and the timing and mechanisms of accretion to the Gondwana margin.
Combined regional mapping, metamorphic petrology, and garnet and monazite geochronology from the Sierra de Maz of northwest Argentina suggest that the region preserves four distinct litho-tectonic units …
Bellingham's Housing Ecosystem, Malene Garcia
Bellingham's Housing Ecosystem, Malene Garcia
WWU Honors College Senior Projects
The goal of my project was to understand what puts people at risk of becoming unhoused and what solutions are the most effective in combating and preventing houselessness.
To figure this out, I used Bellingham as a case study. I did research on homelessness in general, and then used that to guide my research specific to Bellingham. I focused on the causes of houselessness, the demographics of those experiencing houselessness, and the challenges that they face. Then, I researched solutions. To supplement this research, and get different perspectives specific to Bellingham, I interviewed people working in three different organizations: The …
What's In That Scat: An Analysis Of Canada Lynx Diet And Distribution In The North Cascades Ecosystem, Antonia Parrish
What's In That Scat: An Analysis Of Canada Lynx Diet And Distribution In The North Cascades Ecosystem, Antonia Parrish
WWU Honors College Senior Projects
This research provides critical information on the diet and distribution of the elusive North Cascades lynx population. Canada lynx (Lynx canadensis) are considered threatened under the federal Endangered Species Act and are the focus of protection efforts by the state of Washington as a result of climate change, heightened competition, and human interference. I analyzed the diet and distribution of both lynx and coyote (Canis latrans) in the North Cascades to determine whether there was an overlap of prey and habitat that could constrain lynx restoration. During the summer of 2020, the hiking trails in the North Cascades National Park …
Bivalve Monitoring At Weaverling Spit, Nathalie Wagler
Bivalve Monitoring At Weaverling Spit, Nathalie Wagler
WWU Honors College Senior Projects
A service learning project with the Samish Indian Nation to provide materials for increased volunteer training protocol for their bivalve monitoring research. This project is an extrapolation on my College of the Environment capstone project, where I analyzed data collected by Anacortes High School students on the quantity, species, and size of bivalves on Weaverling Spit, land owned by the Samish Indian Nation in Anacortes, WA. Students annually visit Weaverling Spit and follow a protocol to collect this data on bivalves, which hold cultural, economical, and ecological significance to the Samish Indian Nation. While the students are trained on bivalve …
Trade Bait: Season 3, Ben Bagley
Trade Bait: Season 3, Ben Bagley
WWU Honors College Senior Projects
A 5-episode podcast series dissecting the use of statistics in the NFL and NFL Media
Urban Forestry Management Plan: Canopy And Forest Structure Analysis Summary Report, Diamond Head Consulting
Urban Forestry Management Plan: Canopy And Forest Structure Analysis Summary Report, Diamond Head Consulting
Sehome Hill Arboretum
The City of Bellingham is a community of more than 90,000 residents that stretches over 28 square miles, with an additional 8 square miles of Urban Growth Area (UGA). The City manages an expansive urban forest which includes several thousands of acres of forest and thousands of street trees. Bellingham’s urban forest is a valued asset within the community, as recognized in the City’s Comprehensive Plan vision and its Tree City USA status.
In this context, the City is creating an Urban Forestry Management Plan (UFMP) as a strategic plan to help maintain a healthy and desirable urban forest through …
More Than Meets The Eye; Accessibility Of Scientific Information Through Art, Rachael Barrows
More Than Meets The Eye; Accessibility Of Scientific Information Through Art, Rachael Barrows
WWU Honors College Senior Projects
Science is inaccessible to learn in a myriad of ways. Financially it can be difficult to get information. It can also be hard to look up information on your own without knowing what to look for. Teaching science also involves a lot of reading that can be difficult for some disabilities. Through art, however, science can become more accessible, both to share and to learn. Visual learning benefits understanding and retention of information as well as creates clearer holistic concepts. Through paintings, this project shares some scientific information, exploring a way to share and teach science that is more accessible.
Vignette 12: The Blob, Nicholas Bond
Vignette 12: The Blob, Nicholas Bond
Institute Publications
A marine heat wave of unprecedented severity, areal extent and duration occurred in the Northeast Pacific Ocean during 2014-2016. This event, known as the “Blob,” had a wide variety of far- ranging effects on physical, chemical, and biological ocean properties. Because the Blob was such a massive perturbation, it represents an attractively large signal for inquiry in the Salish Sea. It represents a dress rehearsal for typical conditions in future decades due to global climate change.
Vignette 16: Vulnerability And Climate Change Adaptation, Northwest Indian Fisheries Commission, Jamestown S'Klallam Tribe
Vignette 16: Vulnerability And Climate Change Adaptation, Northwest Indian Fisheries Commission, Jamestown S'Klallam Tribe
Institute Publications
The 2013 Jamestown Climate Vulnerability Assessment and Adaptation Plan provides an assessment of vulnerabilities of tribal resources to the negative impacts of climate change. The plan also identifies adaptation measures that the tribe is working to complete. Sea level rise, ocean acidification and climate models show potential for increased risks to critical habitats, tribal infrastructure and tribal health. As one of the first tribes in western Washington to complete a climate adaptation plan and vulnerability assessment, the Jamestown S’Klallam Tribe has identified and prioritized areas where changing climate conditions will leave tribal resources, infrastructure, economy and health most vulnerable, Climate …
Vignette 01: The Salish Sea Estuary System, Bert Webber
Vignette 01: The Salish Sea Estuary System, Bert Webber
Institute Publications
The Salish Sea is an estuarine ecosystem. Freshwater from land drainages mixes with the waters of the Pacific Ocean and results in water with a measurable, although sometimes small amount of freshwater. The Salish Sea is among the preeminent estuaries of North America. Estuarine circulation and flow are central to the high biological productivity in the Salish Sea.
Section 5: Cumulative Ecosystem Effects, Kathryn L. Sobocinski, Jennifer Boldt, Todd Sandell, Jaclyn Cleary, Michael Schmidt, Isobel Pearsall, Iris Kemp, Brian Riddell, Lynda V. Mapes
Section 5: Cumulative Ecosystem Effects, Kathryn L. Sobocinski, Jennifer Boldt, Todd Sandell, Jaclyn Cleary, Michael Schmidt, Isobel Pearsall, Iris Kemp, Brian Riddell, Lynda V. Mapes
Institute Publications
Section 5 introduces cumulative effects and brings in brief case discussions focused on herring, salmon, and orcas. Understanding the layers of stressors the ecosystem faces is integral to gaining a full picture of declines in ecosystem function.
Vignette 03: Birds Of The Salish Sea, Rob Butler
Vignette 03: Birds Of The Salish Sea, Rob Butler
Institute Publications
The significance of the Salish Sea comes into focus when we look at the diversity and abundance of its birds and mammals, some of which are globally, continentally, and nationally important. Of particular importance is the diversity and abundance of species on the Fraser River Delta. There are more species of birds on the delta than any comparable area in Canada, and nearly half of all 550 species of birds reported for British Columbia have been seen on the delta. Despite all that has been learned about marine birds and mammals, large areas of the Salish Sea in Canada have …
Vignette 07: Stormwater Effluent Exerts A Key Pressure On The Salish Sea, Emily Howe
Vignette 07: Stormwater Effluent Exerts A Key Pressure On The Salish Sea, Emily Howe
Institute Publications
One of the primary terrestrial pressures on the Salish Sea estuarine and marine environment is urban stormwater runoff. When rainfall runs across hard, impervious surfaces, rather than soaking into the soil, it picks up and delivers toxic contaminants directly to nearby streams, rivers, and eventually the Salish Sea. In fact, for most toxic substances, surface runoff is the largest contributing source of loading to Puget Sound. Unfortunately, the Salish Sea’s relationship with stormwater effluent is no outlier; stormwater is the fastest growing cause of surface water impairment in the United States as urbanization transitions forested and other natural landscapes to …
Vignette 17: Salish Sea Jellyfish, Correigh Greene
Vignette 17: Salish Sea Jellyfish, Correigh Greene
Institute Publications
The Salish Sea is home to a diverse community of gelatinous zooplankton (or "jellies"). In their adult forms, jellies comprise a relatively large proportion of biomass in the Salish Sea. Questions regarding jellyfish abundance and climate variation in the Salish Sea have been difficult to address, in part because of a lack of consistent monitoring. Research presented in this vignette suggests that jellyfish are sensitive to climate signals like marine water temperatures, but do not appear to be systematically increasing in abundance over time. Due to advances in modeling, we may gain a better perspective on the roles jellies play …
Vignette 20: Fraser River Estuary In Need Of Urgent Intensive Care, Laura Kehoe, Tara G. Martin
Vignette 20: Fraser River Estuary In Need Of Urgent Intensive Care, Laura Kehoe, Tara G. Martin
Institute Publications
The Fraser River is the lifeline of the Salish Sea, influencing its stratification, circulation, and primary productivity. If we do not take strong action to conserve the Fraser River estuary, two-thirds of the species at risk in this region are predicted to have a less than 50% chance of survival. Many of the region's most iconic species could disappear. Conservation action combined with environmental governance is a pathway for a brighter future for the Fraser River and other highly contested regions.
Vignette 21: How Ecological Time-Series Inform Response To Stressors, Jackson W.F. Chu
Vignette 21: How Ecological Time-Series Inform Response To Stressors, Jackson W.F. Chu
Institute Publications
An important part of biodiversity monitoring includes assessing the differences in vulnerability across parts of an ecosystem. Hypoxia is one of the big three climate- related stressors causing biodiversity loss in the oceans. As the ocean warms, its capacity to hold oxygen becomes reduced. At the same time, concurrent shifts in circulation result in changes to how oxygen gets transported from the surface (where oxygen dissolves into the ocean) to the seafloor and from offshore to inshore areas. When a habitat experiences a substantial drop in oxygen, below the point needed to sustain everyday life, animals respond by migrating away, …