Open Access. Powered by Scholars. Published by Universities.®
Ecology and Evolutionary Biology Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Institution
- Keyword
-
- Bioinformatics (2)
- Antibiotic resistance (1)
- Aquaculture (1)
- Aquaponics (1)
- Bioluminescence (1)
-
- Dinoflagellate (1)
- Ecology (1)
- Entomology (1)
- Eutrophication (1)
- Freshwater science (1)
- Great South Bay (1)
- Harmful algae bloom (1)
- Hydrography (1)
- Lux Operon (1)
- Luxr Homolog (1)
- Mass Mortality Event (1)
- Microbial ecology (1)
- Microbiology (1)
- Pfiesteria (1)
- Process design (1)
- Public health (1)
- Quorum Sensing (1)
- Soil (1)
- Soil & Plant Nutrients (1)
- Toxicity (1)
- Transcriptional Activation (1)
- Urban agriculture (1)
- Urban ecology (1)
- Vibrio Harveyi (1)
- Wastewater treatment (1)
Articles 1 - 6 of 6
Full-Text Articles in Ecology and Evolutionary Biology
Microbial Ecology Of Urban Sewers, Emily Lou Lamartina
Microbial Ecology Of Urban Sewers, Emily Lou Lamartina
Theses and Dissertations
Municipal sewage provides a glimpse into the health and activities of a human society. For more than a century, sewage exploration has helped expose the sources of disease outbreaks and track disease progression over time. Recent advancements in wastewater surveillance born from the COVID-19 pandemic have potential to enhance mitigation efforts against the decades-long global health crisis of microbial antibiotic resistance. However, critical knowledge gaps exist in wastewater surveillance, stemming from a lack of understanding in sewer microbial ecology. Ecology reveals trends in how communities respond and adapt to change, which has far-reaching implications for identifying effective strategies for disease …
Effects Of Mass Death On Community Structure And Ecosystem Function, Abby Kimpton Jones
Effects Of Mass Death On Community Structure And Ecosystem Function, Abby Kimpton Jones
Theses and Dissertations
Death and decomposition are natural processes that are generally well-understood. However, large events of death, such as mass mortality events (MMEs) are increasing in frequency and their impacts on the ecosystem are largely unknown. These events may have both bottom-up effects from increased nutrient input as well as top-down effects from loss of an ecological functional group by the affected population. Different functional MMEs may result in different top-down effects, creating cascading effects. In Chapter 1, I test the hypothesis that scavenger and herbivore simulated MMEs generate novel bottom-up and top-down effects. Results indicate that MMEs have a significant effect …
Cultivating Ecosystems: Microbial Communities In Recirculating Aquaculture Systems, Ryan Bartelme
Cultivating Ecosystems: Microbial Communities In Recirculating Aquaculture Systems, Ryan Bartelme
Theses and Dissertations
Intensive cultivation of fish is necessary to meet future global market demands. Recirculating aquaculture systems (RAS) enable dense growth of fish, while occupying less space than traditional aquaculture farms. However, RAS often experience complications and high fish mortalities due to disease and improper waste management. In properly functioning systems, the microorganisms associated with fish (gut, scales) as well as those found in the system environment (water, component surfaces) remove waste and maintain fish health by discouraging growth of opportunistic pathogens. Previous RAS microbiome studies are small in scope, utilize coarse methods, and contain limited long-term spatial or temporal data. With …
Microbial Communities And The Diverse Ecology Of Fecal Indicators At Lake Michigan Beaches, Danielle Cloutier
Microbial Communities And The Diverse Ecology Of Fecal Indicators At Lake Michigan Beaches, Danielle Cloutier
Theses and Dissertations
Fecal indicator bacteria (FIB) such as Escherichia coli (E. coli) and enterococci are used to assess microbiological water quality in recreational waters. The use of FIB follows the assumption that their presence correlates with that of fecal-associated pathogens in recreational waters. The beach ecosystem is complex however and multiple factors can influence the concentration of E. coli and enterococci in the beach environment. Microbial communities within beach sand play a key role in nutrient cycling and are important to the nearshore ecosystem function. E. coli and enterococci, two common indicators of fecal pollution, have been shown to persist in the …
Suitability Of Great South Bay, New York To Blooms Of Pfiesteria Piscicida And P. Shumwayae Prior To Superstorm Sandy, October 29, 2012, Pawel Tomasz Zablocki
Suitability Of Great South Bay, New York To Blooms Of Pfiesteria Piscicida And P. Shumwayae Prior To Superstorm Sandy, October 29, 2012, Pawel Tomasz Zablocki
Theses and Dissertations
Pfiesteria piscicida and P. shumwayae are toxic dinoflagellates implicated in massive fish kills in North Carolina and Maryland during 1990s. A set of physical, chemica l, and biological factors influence population dynamics of these organisms. This study employs i nformation gathered from relevant literature on temperature, salinity, dissolved oxygen, pH, turbulent mixing, and dissolved nutrients, bacteria, algae, microzooplankton, mesozooplankton, bivalve m ollusks, finfish, and other toxic dinoflagellates, which influence Pfiesteria population dynamics. The research focused on whether conditions in the Great South Bay, Long Island, New York were suitable to blooms of Pfiesteria species prior to the passage of superstorm …
Quorum Sensing In Vibrios And Cross-Species Activation Of Bioluminescence Lux Genes By Vibrio Harveyi Luxr In An Arabinose-Inducible Escherichia Coli Expression System, Anne Marie Wannamaker
Quorum Sensing In Vibrios And Cross-Species Activation Of Bioluminescence Lux Genes By Vibrio Harveyi Luxr In An Arabinose-Inducible Escherichia Coli Expression System, Anne Marie Wannamaker
Theses and Dissertations
Bacterial bioluminescence is observed in over twenty known species, primarily in the family Vibrionaceae. However, only Vibrio fischeri and Vibrio harveyi bioluminescence expression mechanisms are well studied. In V. harveyi, expression of the lux operon is activated by the transcription factor LuxR (LuxRVH), resulting in bioluminescence. Homologs of LuxRVH in other Vibrio species have been shown to regulate transcription of a variety of genes. Three parallel quorum sensing pathways co-regulate the expression of LuxRVH. The first objective was to assess possible quorum sensing regulation of lux operon expression in V. cholerae, V. chagasii, …