Digital Commons Network^™

Microbial Communities Hosted By Carnivorous Pitcher Plants: Diversity, Recruitment, Functions And Succession In Sarracenia Purpurea Microbiomes, Jacob Jeffrey Grothjan

Theses and Dissertations

The pitcher plant Sarracenia purpurea supplements nutrient acquisition through carnivory, capturing insect prey which are digested by a food web community of eukaryotes and bacteria. Analysis of both bacterial and eukaryotic diversity, and an understanding of bacterial recruitment into pitchers and succession of bacterial and eukaryotic communities over time have not been well explored. This thesis presents three studies designed to address these gaps using field sampling and manipulative greenhouse experiments. Study I compared bacterial and eukaryotic composition and diversity of pitcher communities within and between populations of plants in two distinct wetland habitats. Genetic sequence analysis revealed an underappreciated …

Community Perceptions And Aesthetic Valuation Of Remediation Gardens, Rachel Bechtold

Graduate Theses and Dissertations

Creating successfully remediated landscapes may rely on both natural resources and human perception in landscape design. Urban areas present a dynamic environment wherein communities and nature compete for resources and space. This dissertation study was designed to better understand aesthetic perceptions of native plants capable of land remediation in midwestern communities. Findings from this study show the importance of aesthetic perceptions of stakeholders towards rehabilitated landscapes and the importance of organizing indicators for future design decisions in an interdisciplinary fashion. Recommendations include continued evaluation of aesthetic perceptions for plant species in urban landscapes and modeling a more consistent framework for …

The Effects Of Urbanization On The Avian Gut Microbiome, Mae Berlow

Doctoral Dissertations

The gut microbiome influences and is influenced by the host, and can affect the host organism by contributing to health, development and immunity. Similarly, the host can influence this community; it’s makeup can vary with host species, locality, diet, social stressors, and environmental stressors. Some of these environmental stressors have arisen due to human-induced rapid environmental change, like urbanization. The physiology and behaviors of organisms that are able to persist in urban environments are often different from their non-urban congeners. Nutrition, development, and immunity—all of which are affected by the gut microbiome—are important factors that can determine survival in urban …

Acoustic Analysis Of Saproxylic Arthropod Diversity In North And Central American Pine Forests, Kristy Marie Mcandrew

Theses and Dissertations

Biodiversity of arthropods living in dead wood is often understudied despite their potential effects on ecological processes such as wood decomposition and nutrient cycling. More time-efficient and less destructive methods are needed to study these saproxylic organisms to fully understand their global diversity. Because ecoacoustic methods have never been applied to saproxylic communities before, field and analytical methods such as waveguides, and soundproofing were developed, tested, and optimized. After developed methods were implemented in the field, Pearson's correlation tests were conducted to compare ecoacoustic index performance to traditional biodiversity indices. We found five significant correlations, all of which occurred at …

Contamination In The Upper Columbia: Smelting And Its Impact To The Environment And Human Health, Brenden Murphy

WWU Honors College Senior Projects

The objectives of this project include discussing the historical context of the smelting that occurred in Washington and Canada over the past century and how political events shaped the geographies of the region(s). Another objective will be to assess the level of environmental impact to the Upper Columbia region and the potential health effects to organisms and humans from the pollution released from the smelters. We will also explore the interaction of different agencies and stakeholders and the political processes of environmental cleanup to which parties are held responsible. Explaining the different advocacy and conservation groups already involved in the …

Abundance, Distribution, And Growth Characteristics Of Three Keystone Vachellia Trees In Gebel Elba National Park, South-Eastern Egypt, Ahmed M. Abbas, Mohammed Al-Kahtani, Stephen J. Novak, Wagdi Saber Soliman

Biology Faculty Publications and Presentations

This study was conducted to evaluate the abundance and distribution pattern of three keystone Vachellia taxa in wadi Khoda and wadi Rahaba, Gebel Elba National Park, a protected area in south-eastern Egypt. These taxa included Vachellia tortilis subsp. tortilis, Vachellia tortilis subsp. raddiana, and Vachellia ehrenbergiana. In wadi Khoda, only two of these taxa were detected (V. tortilis subsp. raddiana and V. tortilis subsp. tortilis), while all three taxa were encountered in wadi Rahaba. The density of trees in wadi Khoda was 34.3 plant ha⁻¹ compared to 26.3 plant ha⁻¹ in …

Cystic Fibrosis: An Ecological Review, Christopher Bozer

Student Works

This article focuses on the mechanisms of cystic fibrosis and the resulting microbial dysbiosis created through this disease. Through mutations in the CFTR gene, chloride ion proteins become dysfunctional, and mucus secreted in the lungs become thick and heavy, allowing infectious and pathogenic bacteria to thrive. 16s rRNA has been the primary method of sequencing the lung microbiome. Researchers have relied on bronchoscopies to collect proper samples. It can be concluded through current research that chloride ion dysfunction allows for an abnormal lung environment to develop. This abnormal environment allows for chronic infection of the lungs, and the formation of …

Creating A Comprehensive Western American/Canadian Fire Dataset, 1880-2018, Katherine Welch

WWU Graduate School Collection

The currently available fire-history data of Western North America (US/Canada) available for geographic and other analyses is largely piecemeal and difficult to find. Data from before the 1980s is scattered among many sources and held by a plethora of different agencies. The aim of this project was to change that daunting reality and provide a single dataset that would fill that data gap and make doing research on and mapping of fires in the late 19th and early 20th centuries more accessible.

This data encompasses 138 years (1880 - 2018), 12 US states, three Canadian provinces and two Canadian territories. …