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Life Sciences

2022

Microbiome

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Articles 61 - 64 of 64

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Microbial Community Dynamics During Key Life History Transitions In The Deep-Sea Chemosymbiotic Mussel, Gigantidas Childressi, Tessa F. Beaver Jan 2022

Microbial Community Dynamics During Key Life History Transitions In The Deep-Sea Chemosymbiotic Mussel, Gigantidas Childressi, Tessa F. Beaver

WWU Graduate School Collection

Marine invertebrates form specific associations with bacterial communities that are different from their environment, change throughout their development, and shape evolutionary and ecological processes. The bathymodiolin (Mytilidae) mussel Gigantidas childressi lives at deep-sea methane seeps and relies on methanotrophic endosymbionts for its nutrition. Its larval life, however, is spent feeding in the water column. Upon metamorphosis at a suitable seep habitat, methanotrophic bacteria rapidly colonize gill cells and the juvenile mussel switches to symbiont-derived energy. To determine if the microbiome of the G. childressi changes during these transitions, the V3/V4 region of the 16S rRNA gene was sequenced to census …


Transitions In Bacterial Communities Across Two Fermentation-Based Virgin Coconut Oil (Vco) Production Processes, Zomesh A N Maini, Crisanto M. Lopez Jan 2022

Transitions In Bacterial Communities Across Two Fermentation-Based Virgin Coconut Oil (Vco) Production Processes, Zomesh A N Maini, Crisanto M. Lopez

Biology Faculty Publications

Despite being one of the most used methods of virgin coconut oil (VCO) production, there is no metagenomic study that details the bacterial community shifts during fermentation-based VCO production. The identification and quantification of bacteria associated with coconut milk fermentation is useful for detecting the dominant microbial genera actively involved in VCO production which remains largely undescribed. Describing the constitutive microbial genera involved in this traditional fermentation practice can be used as a preliminary basis for improving industrial practices and developing better fermentation procedures. In this study, we utilized 16S rRNA metagenomic sequencing to trace the transitions in microbial community …


Investigating The Interplay Of The Immune System, Skin Barrier, And Microbiome Following Dermal Exposure To Triclosan, Rachel Baur Jan 2022

Investigating The Interplay Of The Immune System, Skin Barrier, And Microbiome Following Dermal Exposure To Triclosan, Rachel Baur

Graduate Theses, Dissertations, and Problem Reports

Triclosan is an antimicrobial chemical used in healthcare products that are applied to the skin. However, exposure to triclosan has been positively associated with food allergy, aeroallergy, and asthma severity in humans. In mice, dermal triclosan exposure, although not directly sensitizing, has been shown to augment the allergic response in a model of asthma. Furthermore, exposure to triclosan on mouse skin has been demonstrated to be immunomodulatory through the activity of thymic stromal lymphopoietin and S100 calcium-binding protein A8. The skin barrier and microbiome are known to interact with the immune system and disruptions in barrier integrity and the microbiome …


Anthropogenic Disturbance Regimes Impact The Microbial And Chemical Composition Of Soils And Sediments Across Ecosystems, Gregory D. Martin Jan 2022

Anthropogenic Disturbance Regimes Impact The Microbial And Chemical Composition Of Soils And Sediments Across Ecosystems, Gregory D. Martin

Graduate Theses, Dissertations, and Problem Reports

Human activities have led to profound changes in the climate and environment, fundamentally changing global carbon and nitrogen cycles. Ongoing conversion of wildland for human use and the intensification of agricultural systems have dire consequences for biodiversity and the ecosystem services that support society. While natural disturbance regimes are important for the long-term maintenance of native biodiversity and ecosystem function, many disturbances are becoming increasingly frequent due to anthropogenic activities. Increasing the frequency, intensity, or duration of disturbances can prevent ecosystems from returning to their previous equilibria. Disturbance-induced changes to the local environment shape microbial communities, which in turn govern …