Showing 331 - 340 of 681 Items
Investigating the Impacts of Drought on Turfgrass (Festuca arundinacea) Chlorophyll-a Fluorescence Emission
Date: 2024-01-01
Creator: Ayanna S Hatton
Access: Open access
- When photons from sunlight are absorbed by plants, they can take paths of photosynthesis, fluorescence, or energy dissipation. Instruments to quantify fluorescence have expanded in scale to allow measurements from satellites and flux towers using Solar-Induced Chlorophyll Fluorescence (SIF). Studies have found a positive correlation between SIF and gross primary productivity (GPP; representative of photosynthesis), suggesting SIF is a proxy for GPP. This conclusion encourages the use of SIF to inform decisions about carbon budgets and responding to climate change. Studies of fluorescence on the single-leaf scale have revealed that SIF measurements do not account for all variables nor is there an understanding of the impact of environmental factors, such as drought, on these measurements. In this project, tall fescue turfgrass was placed in one of four differing drought severities for 19 days. Leaf-level measurements of photosynthesis and pulse-amplitude modulated fluorescence were made, demonstrating stomatal closure and inhibition of photosynthesis. This physiological change caused greater photon allocation to energy dissipation. Changes in greenness and the utilization of photoprotective mechanisms such as senescence and anthocyanin accumulation were observed. This study has provided an understanding of the temporal, physiological, and visible impacts of drought on turfgrass to inform interpretations of SIF in future experiments. Caution is crucial in utilizing SIF as a proxy for GPP before further research into the impact of drought on SIF is completed.
Some like it cold: the relationship between thermal tolerance and mitochondrial genotype in an invasive population of the European green crab, Carcinus maenas
Date: 2017-05-01
Creator: Aidan Fisher Coyle
Access: Open access
- Hybrid zones provide natural laboratories to study how specific genes, and interactions among genes, may influence fitness. On the east coast of North America, two separate populations of the European green crab (Carcinus maenas) have been introduced in the last two centuries. An early invasion from Southern Europe colonized New England around 1800, and was followed by a second invasion from Northern Europe to Nova Scotia in the early 1980s (Roman 2006). As these populations hybridize, new combinations of genes potentially adapted to different ends of a thermal spectrum are created in a hybrid zone. To test the hypothesis that mitochondrial and nuclear genes have effects on thermal tolerance, I measured response to cold stress in crabs collected from locations between southern Maine and northern Nova Scotia, and then genotyped the mitochondrial CO1 gene and two nuclear SNPs. Three mitochondrial haplotypes, originally from Northern Europe, had a strong effect on the ability of crabs to right themselves at a temperature of 4.5ºC. Crabs carrying these three haplotypes were 20% more likely to right compared to crabs carrying the haplotype from Southern Europe. The two nuclear SNPs, which were derived from transcriptome sequencing and were strong outliers between Northern and Southern European C. maenas populations, had no effect on righting response at low temperature. These results add C. maenas to the short list of ectotherms in which mitochondrial variation affects thermal tolerance, and suggests that natural selection is shaping the structure of the hybrid zone between the northern and southern populations This discovery of linkage between mitochondrial genotype and thermal tolerance also provides potential insight into the patterns of expansion for invasive populations of C. maenas around the world.

Investigating the Impact of Helicobacter pylori Glycan Biosynthesis on Host Immune Response Access to this record is restricted to members of the Bowdoin community. Log in here to view.
Date: 2024-01-01
Creator: William Joseph Surks
Access: Access restricted to the Bowdoin Community
Shaping Canons and Building Legacies: Collectors and the History of African American Art
Date: 2019-01-01
Creator: Kinaya Hassane
Access: Open access

Dual Isotope Model Insights on the Nitrogen Cycling Network of Coastal Sediments This record is embargoed.
- Embargo End Date: 2026-05-20
Date: 2021-01-01
Creator: Zoë Alexandra Dietrich
Access: Embargoed

Body of Work: Physicality and the Electric Guitar Access to this record is restricted to members of the Bowdoin community. Log in here to view.
Date: 2021-01-01
Creator: Samantha Pollack
Access: Access restricted to the Bowdoin Community
Skin Deep: Analyzing Black Representation in the Teaching of Visual Arts
Date: 2021-01-01
Access: Open access
- My honors thesis argues that at Bowdoin College, failure to provide Culturally Relevant Teaching in art studio courses dismisses the representation of Blackness in the Visual Arts Department. Culturally Relevant Teaching (CRT) recognizes the importance of all students' cultural experiences in different aspects of learning. It allows for equitable access to education for students of diverse backgrounds. CRT is crucial to reconstructing Art Education to represent diverse student bodies. My position as a Black-Indigenous artist enables me to reflect on the intersection of these frameworks and to build upon them in order to highlight the need for pedagogical practice in studio art courses, that doesn’t center technical training derived from the Western canon of art production in Bowdoin’s Visual Arts Department. My research lives on a digital format, where you will engage with the history of Art at Bowdoin from 1794 to the present, oral histories from Black identifying alumni who have navigated the department, theoretical frameworks, and an auto ethnography that breaks down my self-taught pedagogical practice in response to the representational gaps in the curriculum. As you navigate this site, I ask you to follow the written instructions and engage with the interactive material. I will virtually guide you through this project chronologically, and through the lens in which I have experienced personally and through observation.

Men Like Us: Notes on Gay Migrancy Access to this record is restricted to members of the Bowdoin community. Log in here to view.
Date: 2025-01-01
Creator: Campbell Ives Zeigler
Access: Access restricted to the Bowdoin Community
The Wound and the Word: Examining the Literary Afterlife of Gwangju’s Trauma in Korean and
Korean Diaspora Literature
Date: 2025-01-01
Creator: Seo Yeon (Sophie) Yook
Access: Open access
- My project examines the enduring legacy of the May 1980 Gwangju Uprising and its reverberations across Korean and Korean American literature, memory, and identity. Framed by the unforeseen reemergence of martial law in South Korea on December 3, 2024–an event that eerily echoed the nation’s violent, authoritarian past–this project interrogates how historical trauma continues to resurface and be reflected in political reality and cultural narrative. Anchored in close readings of Han Kang’s Human Acts and E. J. Koh’s The Liberators, my project traces a literary and ethical journey mapped through the metaphor of the wound: “Bloodshed,” where pain erupts; “Inflammation,” where it lingers and deepens; and “Growth and Rebuilding," where healing becomes imaginable, if never quite complete. The first chapter positions Han’s polyphonic novel as a work of countermemory, a literary act of resistance against state-sanctioned silence that then demands active readerly participation. The second chapter turns to Koh’s diasporic narrative to consider how trauma migrates across generations and geographies through the medium of translation, revealing the subtler textures of inherited pain. Finally, the last chapter synthesizes theories of postmemory and reparative reading to intimate how the pair of texts move beyond trauma’s paralysis, imagining pathways toward healing, remembrance, and collective renewal. Ultimately, I contend that literature offers a vital site for rearticulating and re-envisioning suppressed histories, particularly in the wake of political repression and cultural amnesia. In returning to Gwangju as a living, aching wound, this project engages in the ethical labor of remembrance and the hopeful, reparative task of repair. It affirms narrative as both vessel and balm, as a means of bearing pain and of gesturing toward the possibility of healing across time, space, language, and community.

“My Bright Whatever”: A Scholar’s Life in Letters This record is embargoed.
Date: 2025-01-01
Creator: Carolina Weatherall
Access: Permanent restriction