Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 73 for “"Environmental Microbiology and Microbial Ecology"”.
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Impacts of trace metal pollution, urbanization and aquifer recharge on Spokane River macroinvertebrates
… tissue, 2) effects of aquifer recharge, and 3) impact of urbanization. I predicted that aquifer inflows of cold, clean water would mitigate effects of pollution, and that reaches above the City of Spokane would be less negatively affected by urbanization; both were unsupported. I also …
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Monitoring the influx of marine derived Nitrogen and characterizing soil food webs of riparian zones of the Elwha River Watershed, WA, USA.
… to productivity in terrestrial ecosystems, and can have large effects on ecosystem processes. Two sources of nitrogen to Pacific Northwest riparian areas are marine derived nitrogen (MDN) via anadromous pacific salmon and symbiotic nitrogen fixation via Alnus rubra. The recent removal of two …
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The effects of warming on carbon and microbial community wetland dynamics at Turnbull National Wildlife Refuge, Washington
<p>Wetlands are biodiverse ecosystems that play a key role in the biogeochemical cycling of carbon. In the face of global warming, wetland hydroperiods could shift causing changes in their functionality. My field experiment surveyed 3 plots within 12 wetlands of each hydroperiod class (i.e. 12 …
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Remnant assessment and soil inoculation to inform large-scale prairie restoration at Eastern Washington University
<p>The Palouse Prairie of Eastern Washington and Western Idaho, characterized by rolling hills of deep loess soil, is one of the most endangered ecosystems in the world, with more than 99% converted to tilled farmland. To mitigate this loss, Eastern Washington University has begun prairie …
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Epiphytic Diatom Community Structure in a Karst Riverine System
… Green River, Kentucky to a gain a better understanding of the role of diatoms in the food web. The host species studied were Podostemum ceratophyllum and Cladophora. Percent cover of P. ceratophyllum and Cladophora were quantified in the four study reaches. The host species were sampled …
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Escherichia coli Strain Diversity in Humans: Effects of Sampling Effort and Methodology
… <em>Escherichia coli</em> strain diversity and demographics in human hosts are frequently inconsistent regarding sampling effort and methodology while current strain typing methods are often expensive or laborious. To rectify these inconsistencies, sampling effort was investigated by …
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How Historic Shipwrecks Influence Dispersal of Deep-Sea Microbiomes
… around artificial structures in the ocean and how they connect to other deep-sea habitats is unknown. Dispersal processes are explained for some macroorganisms by theories in ecology, specifically the Theory of Island Biogeography and the Wooden Stepping Stone hypothesis. These have not …
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EFFECT OF MYCORRHIZAE INOCULATION ON THE GROWTH AND SUCCESS OF THREE TAXODIUM DISTICHUM HYBRIDS IN SALINE - IMPACTED COASTAL SOILS
<p>In 2008, Galveston Island was severely impacted by Hurricane Ike, resulting in high salt deposition in the soil and groundwater. This caused a loss of many native plant species. A study was initiated to determine effective ways to promote the growth conditions of three bald cypress genotypes …
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Demographics and Transfer of Escherichia coli Within Bos taurus Populations
… between individuals of the same species and if interspecies transmission is possible. Proximity of cattle was also studied as a contributing factor to the transfer of <em>E. coli</em>. To accomplish this goal, <em>E. coli</em> isolates from cattle and cohabitating ground squirrels were …
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Shifts in Myxomycete Community Structure in Selected Microhabitats Across Nutrient Treatments in a Lowland Tropical Forest of Panama
… are abundant amoeboid predators of bacteria and other microorganisms. They are found worldwide, largely in association with decaying plant material in terrestrial habitats. Their consumption of bacterial prey puts microbial predators such as myxomycetes in a key position in various ecosystem …
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Comparative Analysis of Rhizosphere and Endosphere Microbiome of Different Blueberry Species (Vaccinium sp.)
… Due to its health benefits, there is a huge demand globally, thus expanding the industry. Breeding programs are essential to maintain such industries. Challenges that play a role in contemporary breeding programs are various biotic and abiotic stress factors. Studies have shown that …
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Identification and Characterization of Phytoplankton in Barnegat Bay, New Jersey
… of New Jersey. The bay serves as a home to thousands of species of plants, animals, and microorganisms. During the summer months, the population of the bay increases from 576,000 to over 1.5 million residents. In 2011, the Barnegat Bay Partnership reported that environmental conditions of the bay …
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How do fine sediments and Hangman Creek discharge affect benthic macroinvertebrates in the Spokane River?
… deposition in stream beds is generated by land use practices such as timber harvest, agriculture and urbanization. Hangman Creek is a major tributary and source of fine sediment to the Spokane River. Benthic macroinvertebrates play a crucial function in food webs as an important source of …
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Occurrence and Characteristics of Nonfruiting Myxobacteria Isolated from Pine Forest Soils
… to the taxonomy of the nonfruiting myxobacteria and to determine the effects of fire on the occurrence and characteristics of nonfruiting myxobacteria isolated from pine forest soil Three years after a prescribed burn, the population of nonfruiting myxobacteria was decreased in the burn site. The …
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Production and Degradation of 4-Ethylphenol in <i>LACTOBACILLUS SP. </i>pep8 Cultures and in Blended Swine Lagoon Enrichments
… (4-EP) is a malodorant of swine waste and is derived from a component of lignin called p-coumaric acid (p-CA). The production of 4-EP from lignin in swine waste is untested. Additionally, the effect of Fe (III) on 4-EP levels is unknown. Four experiments were performed to determine if …
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Impacts of the Deepwater Horizon Oil Spill on Microbial-Mediated Cellulose Decomposition in Mississippi Gulf Coast Salt Marshes
… decomposition.<em> </em>Decomposition in surface and subsurface marsh sediments was assessed in stands of <em>Spartina alterniflora</em> and <em>Juncus roemerianus</em> in 9 Mississippi Gulf Coast marshes exposed to differing oiling intensities<em>.</em> The cotton strip bioassay technique was …
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What shapes instruction in course-based undergraduate research experiences? & Spatial, temporal, and structural drivers of soil microbial communities in regenerative agricultural systems
… discovery, real-world relevance, collaboration, and iterative experimentation. CUREs offer a more accessible approach to engaging diverse student populations in science compared to traditional labs. However, they can place heavy demands on instructors, with challenges such as time limitations, …
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Diversity Analysis of Soil Fungus Communities in Disturbed, Nursery, and Mature Forest Conditions
… d’Alene Forest Service nursery, Swamp Lake, and the Keechelus Lake wildlife overcrossing soils. All sampling sites were connected by their relation to the revegetation and native soil plug inoculation of the wildlife overpass. This study was an effort to describe soil fungi communities …
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