Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Geochemistry (2)
- ASARCO smelter (1)
- Beavers (1)
- Biogeochemistry (1)
- Carbon (1)
-
- Geology (1)
- Geomorphology (1)
- Geothermal (1)
- Great plains ecosystem (1)
- Groundwater (1)
- Heavy metals (1)
- Hydrogeochemistry (1)
- Lakes (1)
- Methow (1)
- Mixing (1)
- Paleoclimate (1)
- Paleoecology (1)
- Raccoon and opossum diet (1)
- Redox (1)
- Sediment (1)
- Sediment storage (1)
- Sedimentation (1)
- South Sound (1)
- Stable Isotope Analysis (1)
- Stable Isotopes (1)
- Stable isotope analysis (1)
- Urban ecology (1)
Articles 1 - 6 of 6
Full-Text Articles in Physical Sciences and Mathematics
Comparison Of The Chemical And Isotopic Composition Of Groundwater And Surface Water In The South Sound Region, Andrew H. Oberhelman
Comparison Of The Chemical And Isotopic Composition Of Groundwater And Surface Water In The South Sound Region, Andrew H. Oberhelman
Summer Research
This project seeks to characterize the chemical and isotopic compositions of groundwater and surface water in portions of Pierce and King Counties, with the goal of using these results to determine the water sources of local lakes. Specifically of interest are lakes studied by Puget Sound students over the past ~10 years where water analyses appear to define a mixing line, likely between surface runoff and the shallow groundwater (Figures 1, 2, and 3). Existing data pertain only to surface water from the lakes while data pertaining to groundwater is patchy or nonexistent and includes only a few of the …
Reintroduced Beavers Rapidly Influence Sediment Storage And Biogeochemistry In Headwater Streams Of The Methow River, Wa, Rita Mccreesh
Reintroduced Beavers Rapidly Influence Sediment Storage And Biogeochemistry In Headwater Streams Of The Methow River, Wa, Rita Mccreesh
Summer Research
To understand how rapidly beaver bioengineering impacts sediment organic material accumulation, we characterized the short-term, temporal dynamics of how reintroduced beavers have influenced sediment and organic material accumulation on 1st and 2nd order streams over the past decade. Sources of beaver related organics include coarse woody debris, fecal matter, and allochthonous material. We measured sediment physical properties, and analyzed samples for weight percent carbon and nitrogen. Our temporally constrained results provide insight into the rapidity at which beavers can influence biogeochemical systems in headwater streams.
Controls On The Distribution Of Asarco Heavy Metals In Tacoma-Area Lakes, Angelica J. Calderon
Controls On The Distribution Of Asarco Heavy Metals In Tacoma-Area Lakes, Angelica J. Calderon
Summer Research
Lake sediments and soils within the South Puget Sound region contain elevated levels of Pb, As, Cu, Zn, and other metals as a result of ASARCO smelting operations. While significant work has been done on determining the extent of heavy metal pollution, little research has been directed toward the distribution of heavy metals in local lake sediments. Field work, including lake coring, deploying of sediment traps, and collecting soils coupled with geochemical analysis will provide the tools to better understand the local lake chemistry. Previous work by Puget Sound students and faculty has established that sediment profiles do not correspond …
Geochemistry And Origins Of Thermal Springs Waters Of The Olympic Peninsula And Cascade Range, Washington, Jon Kenneth K. Golla
Geochemistry And Origins Of Thermal Springs Waters Of The Olympic Peninsula And Cascade Range, Washington, Jon Kenneth K. Golla
Summer Research
The state of Washington contains 98 low temperature (surface temperatures between ~ 20 - 50 oC) geothermal springs, which are powered by the convective circulation of groundwater that is heated by the natural heat of the Earth. These systems operate in a cycle that begins when precipitation percolates downward into the subsurface and comes in contact with a heat source. Subsequently the heated water returns to the surface, in most cases, having interacted chemically with rocks in the reservoir and/or along its ascent path. Surveys done by the USGS between the 1970s – early 1990s show there is significant …
Using Stable Isotopes To Determine Resource Partitioning And The Role Of Anthropogenic Food Sources On Urban Populations Of Seattle And North Tacoma Raccoons (Procyon Lotor) And Opossums (Didelphis Virginiana), Mairan Smith
Summer Research
With increased urban space and human-wildlife interactions, there is a clear need for research directed towards urban wildlife in order to better manage land use, wildlife populations, and health concerns. No previous studies have quantified the role of anthropogenic food sources in raccoon and opossum diets. Corn, a C4 plant, is not found in Seattle and Tacoma except in processed human food, making it an excellent proxy for determining anthropogenic influence on wildlife diet. Raccoon diet in all regional populations is highly variable among individuals (range = 10 – 70% anthropogenic diet). For Seattle raccoons some of this variability is …
Filling The Gaps: A Comprehensive Understanding Of Diets And Ecosystem Interactions Within The Modern And Fossil Small Mammal Communities Of Meade Basin, Kansas, Hannah Richardson, Kena Fox-Dobbs, Andrew Haveles
Filling The Gaps: A Comprehensive Understanding Of Diets And Ecosystem Interactions Within The Modern And Fossil Small Mammal Communities Of Meade Basin, Kansas, Hannah Richardson, Kena Fox-Dobbs, Andrew Haveles
Summer Research
The modern Great Plains ecosystem began shifting from a woodland biome to a grassland in the Miocene. Stable isotope analysis (SIA) of a diverse community of local consumers, in this case small mammals, provides both a paleoenvironmental record of the shift from woodland C3 biomass to grassland C4 biomass, and a paleoecological record of species interactions and community dynamics. The Meade Basin in southwestern Kansas contains a rich and fairly complete fossil record of a Great Plains small mammal community throughout the past 5 million years. SIA of fossil tooth enamel from Meade small mammals has revealed interesting …