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 167 for “"community dynamics"”.
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Soil microbial community dynamics associated with agricultural crops
… composition (Chapter 2) of the soil microbial community over the years of the experiment. I found that soil microbial community structure (measured as abundance of bacteria and fungi) and composition was not influenced by the cultivar mixtures, but rather by the year, location, and plant …
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Soil Microbial Community Dynamics In Florida Scrub Ecosystem
… and long-term fire effects on the soil microbial community. Fire effects were studied in a chronosequence, comprising a recently burned scrub during a winter-prescribed fire to scrub where fire did not occur for 40 years. The number of culturable cells was reduced by two orders of magnitude by …
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Microbial community dynamics in denitrifying biofilters receiving agricultural drainage
… management variables over time. Total bacterial community structure was analyzed by Automated Ribosomal Intergenic Spacer Analysis (ARISA), denitrifying bacteria community structure was determined by Terminal Restriction Fragment Length Polymorphism (T-RFLP) of nosZ (one of the nitrous oxide …
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The phytoplankton of a eutrophic lake : community dynamics and ultrastructural studies
Sawley Dene, a small secluded lake in North Yorkshire, supports large populations of diatoms in spring and blue-green algae in late summer. Characteristics of the drainage area give this shallow lake calcareous water and a long retention time; although persistent summer stratification does not …
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Profiling Bacterial Community Dynamics For Wildlife Ecology and Geological Mineral Exploration
… range of microbiome environments. Bacterial community 16S rRNA gene amplicon sequencing is an approach to microbiome exploration that profiles community composition, structure, and dynamics across environmental conditions. In this thesis, 16S rRNA gene amplicon sequencing is used to …
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FORAMINIFERAL COMMUNITY DYNAMICS OF THE CHESAPEAKE GROUP, CALVERT CLIFFS, MARYLAND, USA
The long-term impact of climate and sea-level change on marine communities can be documented using the fossil record of well-studied, and widely distributed organisms such as benthic foraminifera. The Calvert and Choptank formations of the Calvert Cliffs, MD were deposited during the Middle Miocene …
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Predicting phytoplankton community dynamics: understanding water quality responses to global change
… environmental heterogeneity and ecological community structure, both of which are currently undergoing unprecedented alterations due to global change. In particular, many freshwater phytoplankton communities are experiencing multiple global change stressors, altering phytoplankton community …
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Butterfly and floral community dynamics at a native prairie agrofuel research site
1 PDF file (vii, 73 pages)
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Effects of tallgrass prairie restoration on snake community dynamics in Northern Illinois
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-03-01 without embargo terms
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Plant introductions and community dynamics across environmental gradients in Great Lakes coastal wetlands
Great Lakes coastal wetlands provide vital ecosystem services, including water quality improvement, flood mitigation, and fish and wildlife habitat. However, many of these wetlands have been lost, and those that remain face various threats, including invasion by nonnative plants. Within coastal …
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Investigating exudate- and habitat-mediated effects of phytoplankton on lake bacterial community dynamics
… number of potential explanations for correlated dynamics. Recent observations of temporal succession in lake microbial communities provide evidence for phytoplankton populations acting as biological drivers structuring bacterial communities. The following thesis addresses two potentially …
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Soil microbial community dynamics in response to cover crop implementation and P fertilizer management
… health metrics; (ii) to explore the microbial community structure using phospholipid fatty acid analysis, and (iii) to identify key microbial functional gene composition, and soil health metrics relate to key soil microbial functional gene composition in the fall 2019 and spring 2020 seasons in …
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Aquatic Turtle Community Dynamics in Relation to Reintroduction of Alligator Snapping Turtles, Macrochelys Temminckii
… of the Verdigris River, supported a turtle community that was comparatively dissimilar to other sites sampled, including in comparison to the main channel of the Verdigris River. Possible displacement of Ouachita map turtles (Graptemys ouachitensis) was observed where alligator snapping …
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Risk, Reward, And The Role Of Habitat Selection On Community Dynamics In Temporary Ponds
… selection, are equally important determinants of community structure. In freshwater systems, the lethal effects of dominant predators (particularly fish) are well established, while the transition from permanent to temporary ponds is a defining characteristic. This transition produces distinct …
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