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Full-Text Articles in Life Sciences
Monitoring Selenium Bioaccumulation In False Map Turtles (Graptemys Pseudogeographica), Grant M. Budden
Monitoring Selenium Bioaccumulation In False Map Turtles (Graptemys Pseudogeographica), Grant M. Budden
Honors Thesis
Selenium is an element that becomes bioactivated in aquatic environments. Selenium bioaccumulation may threaten a South Dakota state-threatened species, the False Map Turtle (Graptemys pseudogeographica). Invertebrate filter feeder species like zebra mussels (Dreissena polymorpha) uptake selenium via exposure. Previous laboratory work has found that False Map Turtles consume large amounts of zebra mussels throughout the summer, leading to selenium bioaccumulation from selenium transfer from prey to predator. A myriad of adverse effects, like selenosis, reproductive infertility, and death, are associated with high selenium concentrations. Sampling was completed on False Map Turtles in the summer of 2022. …
Measuring Selenoprotein Content In False Map Turtles (Graptemys Pseudogeographica) Along The Missouri River, Ruby A. Hawks
Measuring Selenoprotein Content In False Map Turtles (Graptemys Pseudogeographica) Along The Missouri River, Ruby A. Hawks
Honors Thesis
Metals and metalloids are becoming more prevalent in lakes and reservoirs of South Dakota which are toxic and hazardous in high concentrations or when biomagnified through trophic levels. Selenium is of particular concern as it can bind into the structures of proteins in place of other elements, changing protein structure and function within affected organisms. Zebra mussels (Dreissena polymorpha) are an invasive filter-feeding metal-bioaccumulating species that are rapidly spreading upstream through the Missouri River. They can take up selenium and directly transfer it to higher trophic level taxa. False map turtles (Graptemys pseudogeographica) are a common …
Impacts Of Environmental And Anthropogenic Stressors On Amphibian Welfare, Diversity, And Distribution In The Upper Missouri River Basin, Kaitlyn Campbell
Impacts Of Environmental And Anthropogenic Stressors On Amphibian Welfare, Diversity, And Distribution In The Upper Missouri River Basin, Kaitlyn Campbell
Dissertations and Theses
Climate change and anthropogenic stressors have contributed to rapid declines among various taxonomic groups; however, amphibian declines have been particularly intense and primarily stemmed from warming temperatures, habitat loss, exposure to contaminants, disease, and their subsequent interactions. Several climate mitigation strategies, like Bioenergy with Carbon Capture and Storage, have been proposed to alleviate the impact of rising temperatures; however, these proposals often fail to recognize and quantify the true impact on fauna, including changes in species distributions. To address this critical gap in knowledge, this research identified current amphibian distributions in the Upper Missouri River Basin and projected distribution changes …
Selenium Burdens In Painted Turtles (Chrysemys Picta), Holly A. Gerberding
Selenium Burdens In Painted Turtles (Chrysemys Picta), Holly A. Gerberding
Honors Thesis
Tile drain systems are a critical advancement in agriculture that move excess water from crop fields to streams, ditches, and wetlands. Selenium is a necessary mineral but is considered toxic at high levels. Previous research indicates that wetlands with tile drains are at a higher risk for elevated selenium concentrations. Selenium enters the aquatic ecosystem via these tile systems and us taken up by invertebrates and continues to bioaccumulate mainly via direct transfer in higher trophic level taxa such as fish, amphibians, reptiles, birds, and mammals. For this study, painted turtles (Chrysemys picta) served as a model organism to …