Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Entire DC Network
Climate Change And The Global Nutrient Overload: The Microbial Response Of Extreme Waterbodies To Environmental Change, Samuel P. Bratsman
Climate Change And The Global Nutrient Overload: The Microbial Response Of Extreme Waterbodies To Environmental Change, Samuel P. Bratsman
Theses and Dissertations
One of the defining characteristics of our current epoch—the Anthropocene—is modification of nutrient cycles. At regional to global scales, humans have fundamentally reshaped the availability of carbon, nitrogen, and phosphorus. These changes are particularly apparent in freshwater ecosystems, which receive surface and groundwater inputs of nutrients from agriculture, fossil fuel use, and wastewater. In this thesis, I investigated how the addition of nutrients affects microbial community and biogeochemistry in two extreme environments: the hypereutrophic shallow Utah Lake and nutrient-limited Arctic permafrost streams. In my first chapter, I used bioassay and dilution bioassay experiments to identify what factors control harmful algal …
Mutants, Sentinels, And Cerebro: Messages About Technology And Society In Science Fiction Films, Paige Marie Lee
Mutants, Sentinels, And Cerebro: Messages About Technology And Society In Science Fiction Films, Paige Marie Lee
Theses and Dissertations
Technology plays a significant role in society and in entertainment. People hold an ambivalent attitude about technology that is often illustrated in science fiction films. Much like myth telling stories to teach a lesson, science fiction films caution viewers of the effects of powerful technology usage in culture today. This thesis examines X-Men to show how relevant principles found in myth continue to be relevant to media consumption. Using media ecology to inform the reader about the technological environment (Mumford, 1944), this analysis of technology portrayed in X-Men shows the implications real world technology, such as radiation, weapons, and artificial …
Families In The Sky: Investigating The Population Structure Of Pinus Longaeva, Samuel Arnold Decker
Families In The Sky: Investigating The Population Structure Of Pinus Longaeva, Samuel Arnold Decker
Theses and Dissertations
In the Western United States, the Great Basin is a geographic feature that is home to a variety of unique species, including Great Basin bristlecone pine (Pinus longaeva, PILO). P. longaeva is well known for the age of some of the trees, some of which are over 4000 years old. In this study 17 microsatellite markers (simple sequence repeat, SSR) are identified and used to genotype a selection of 480 individuals spread across 24 PILO populations and 60 individuals divided equally between 2 outgroup species, Pinus aristata and Pinus flexilis. One population of PILO, HMW, shows more genetic similarity with …