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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 …
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 …
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 …