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Anthropogenic Influences On Bacterial Assemblages In Stream Biofilms, Elizabeth M. Ogata
Anthropogenic Influences On Bacterial Assemblages In Stream Biofilms, Elizabeth M. Ogata
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Bacteria within biofilms are an essential component of stream ecosystems, influencing the movement of carbon (C), nitrogen (N), and phosphorus (P) in watersheds. To better understand the ecological effects of human activities on stream ecosystems, my research examined how nutrients and pharmaceuticals, common pollutants in streams worldwide, influence bacterial assemblages in stream biofilms. First, I tested how nutrients (N, P, iron) and pharmaceuticals (caffeine, diphenhydramine) influenced biofilm bacterial microbiomes (taxa present in at least 75% of samples of a contaminant treatment). Nutrients allowed taxa known for their ability to thrive in nutrient-rich environments to dominate microbiomes, pharmaceuticals supported a rich …