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Full-Text Articles in Biology

Hydrocarbon Biodegradation And Microbial Community Composition In Freshwater Systems And Enrichment Cultures, Emma Byrne Jan 2021

Hydrocarbon Biodegradation And Microbial Community Composition In Freshwater Systems And Enrichment Cultures, Emma Byrne

Dissertations, Master's Theses and Master's Reports

In this study, we investigated if significant differences existed seasonally in the microbial response to oil in the Straits of Mackinac, and if crude (Bakken) and refined (non-highway diesel) oil exposure had impacts on microbial community composition and hydrocarbon biodegradation across seasons using a microcosm-level experiment. Ambient microbial communities differed between seasons, with significantly enriched microbial groups present between all sample types except for between fall 23 ℃ and fall 4 ℃ microcosms. We found significantly different microbial communities between control samples and oil-amended samples in every season, but no significant community differences between either oil type. We found Amplicon …


Functional Genetic Approaches To Provide Evidence For The Role Of Toolkit Genes In The Evolution Of Complex Color Patterns In Drosophila Guttifera, Mujeeb Olushola Shittu Jan 2021

Functional Genetic Approaches To Provide Evidence For The Role Of Toolkit Genes In The Evolution Of Complex Color Patterns In Drosophila Guttifera, Mujeeb Olushola Shittu

Dissertations, Master's Theses and Master's Reports

Toolkit genes are set of genes that orchestrate the development of basic body plan of animals, and they are highly conserved in all animals. The co-option of the toolkit genes into the pigmentation pathway has led to the evolution of novel species. This study focuses on understanding how the complex color patterns in animals develop by using the Drosophila species in the quinaria group as models. We developed an mRNA in situ hybridization (ISH) protocol, which allowed us to study gene expression patterns in the abdomen of developing pupae of non-model Drosophila species (Chapter 2). Through ISH, we found that …