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The Effects Of Climate Change On The Heart Rates & Growth Of Sea Slugs In The Gulf Of Maine, Jennifer Leigh Gibson Aug 2019

The Effects Of Climate Change On The Heart Rates & Growth Of Sea Slugs In The Gulf Of Maine, Jennifer Leigh Gibson

Master's Theses and Capstones

In the next 80 years, sea surface temperatures are expected to increase by 1.5o to 2oC and ocean pH is expected to drop by 0.06 to 0.32 units, with exacerbated effects seen in coastal waters. Temperature increase has already forced organisms to shift their range polewards and ocean acidification has negatively affected calcifying organisms. Interactive effects, only more recently studied, vary depending on phylum and life cycle stage. This study examined both the upper thermal tolerance and interactive effect of temperature and acidification on the heart rate of five cold-water species of nudibranchs (Aeolidia papillosa, Cuthona gymnota, Dendronotus frondosus, Flabellina …


Fungal Community And Soil Responses To Invasive Alliaria Petiolata (Garlic Mustard), Soil Warming, And Nitrogen Deposition, Mark Alan Anthony May 2019

Fungal Community And Soil Responses To Invasive Alliaria Petiolata (Garlic Mustard), Soil Warming, And Nitrogen Deposition, Mark Alan Anthony

Doctoral Dissertations

Non-native, invasive plants can fundamentally alter soil fungal communities and edaphic properties. In this dissertation, I first measured fungal and edaphic responses and recovery to invasive, Alliaria petiolata (garlic mustard; Brassicaceae) eradication across Southern New England. I conducted an experimental eradication and tracked fungal communities and soil properties for three years in relation to reference uninvaded plots and actively invaded plots. Neither the fungal community nor soil properties recovered (i.e. became similar to reference uninvaded plots) following eradication, and I discuss how altered soil properties likely prevented fungal communities from recovering via environmental filtering. I also measured fungal and edaphic …


Spatio-Temporal Niche Patterns And Thermal Environmental Cues: Implications For The Persisitence Of Nicrophorine Burying Beetles, Maranda Lillian Keller May 2019

Spatio-Temporal Niche Patterns And Thermal Environmental Cues: Implications For The Persisitence Of Nicrophorine Burying Beetles, Maranda Lillian Keller

Master's Theses and Capstones

The persistence of burying beetles (Silphidae: Nicrophorus) depends on the successful acquisition of a highly competitive resource. Breeding pairs of the Nicrophorine genus work together to bury and prepare a suitable carcass as food for their developing larvae. To understand the mechanisms allowing for the persistence of multiple burying beetle species in Nicrophorine-rich communities, this thesis explores how sympatric burying beetles utilize space and time to partition the carrion resource. Further, to explore how thermal environments influence the reproductive biology of burying beetles, the response of Nicrophorus marginatus, both within and across generations is measured by monitoring rearing behaviors, movement …


Assessing Potential Impacts Of Climate Change On American Lobsters (Homarus Americanus) With Novel Tools And Techniques, Benjamin C. Gutzler Jan 2019

Assessing Potential Impacts Of Climate Change On American Lobsters (Homarus Americanus) With Novel Tools And Techniques, Benjamin C. Gutzler

Doctoral Dissertations

The Gulf of Maine is currently experiencing rapid environmental changes, in the form of warming temperatures, increasing acidity, and a benthic ecosystem that is dominated by the American lobster (Homarus americanus) as the sole major predator and most significant fishery. The overall goal of my dissertation research was to investigate how the increased stress from warmer, more acidic, waters might impact individual lobsters, and thus lobster populations. To address this overall objective it was necessary to develop novel methods for investigating lobster behavior and reproduction, a theme that will run throughout this dissertation. In Chapter Two, I developed a new …


Generational Aspects Of U.S. Public Opinion On Renewable Energy And Climate Change, Lawrence C. Hamilton, Joel N. Hartter, Erin Bell Jan 2019

Generational Aspects Of U.S. Public Opinion On Renewable Energy And Climate Change, Lawrence C. Hamilton, Joel N. Hartter, Erin Bell

Sociology

The topics of climate change and renewable energy often are linked in policy discussions and scientific analysis, but public opinion on these topics exhibits both overlap and divergence. Although renewable energy has potentially broader acceptance than anthropogenic climate change, it can also sometimes face differently-based opposition. Analyses of U.S. and regional surveys, including time series of repeated surveys in New Hampshire (2010–2018) and northeast Oregon (2011–2018), explore the social bases of public views on both issues. Political divisions are prominent, although somewhat greater regarding climate change. Such divisions widen with education, an interaction effect documented in other studies as well. …