Theses and Dissertations at Montana State University (MSU)
Permanent URI for this collectionhttps://scholarworks.montana.edu/handle/1/733
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Item Spatial analysis of the recovery of submerged aquatic vegetation in the Hudson river estuary following the 2011-2012 hurricane seasons(Montana State University - Bozeman, College of Agriculture, 2019) Carroll, Sean Michael; Chairperson, Graduate Committee: Scott PowellSubmerged aquatic vegetation (SAV) is a critical habitat found in estuarine ecosystems throughout the world. SAV performs a multitude of ecosystem functions ranging from water quality improvement to habitat for macroinvertebrates and juvenile fish, and acts as a significant contributor to dissolved oxygen throughout the estuarine system. In the Hudson River Estuary (HRE), native SAV beds have been greatly reduced or altered by threats such as sedimentation, water quality issues, and the spread of invasive aquatic plants, as well as by disturbance from natural events such as large-scale storms. In 2011 and 2012, three hurricanes made landfall in the northeastern United States, having a tremendous impact on the Hudson River and the Hudson Valley region as a whole. SAV in the estuary was impacted by both storm surge as well as significant sediment deposition from the river's tributaries. However, in the wake of these events, there is uncertainty about the spatial patterns of SAV loss and recovery, and how these patterns are affected by the hydrology and physical characteristics of the river. Therefore, my study seeks to address this knowledge gap by investigating the impacts of these storms on SAV spatial patterns and the influence of SAV proximity to shoreline, tidal wetlands, and persistent "colony" SAV beds. I investigated these effects by analyzing overall (whole system) SAV recovery, the spatial patterns of recovery, and the correlation of recovery to prior SAV coverage and proximity to these features. Analysis was done using three years of remotely-sensed SAV GIS data, and was done at three different spatial scales. SAV coverages were determined at each scale for all three years and areal-change and percentage-change were calculated. Distance to the three aforementioned features was calculated for the fine-scale analysis. The results suggest that there was significant SAV loss river-wide between 2007 and 2014, followed by significant recovery between 2014 and 2016. Loss between 2007 and 2014 was greatest in the most upstream approximately 100 km of the river, likely a result of proximity to the Mohawk River, a major tributary and large sediment source during the storms. SAV recovery showed a similar pattern, occurring most in these upstream reaches. Distance from shoreline, tidal wetlands, and persistent SAV beds had varying impacts on SAV loss and recovery. The findings of this study help to elucidate both the potential impacts on the magnitude and patterns of vegetation loss following a large storm event and subsequent sediment flux, as well as the recovery potential of this vegetation during 'normal' years. Such information can help inform future biological studies of the HRE and watershed management decision-making.Item Water quality and physical parameters of Barnegat Bay after Hurricane Sandy(Montana State University - Bozeman, College of Agriculture, 2019) Rodenberg, Taylor; Chairperson, Graduate Committee: William KleindlBarnegat Bay is a coastal water body located off of the east coast of New Jersey. The bay is bordered by an estuary system to the west and barrier island and the Atlantic Ocean to the east. The bay is an important ecosystem for dozens of species of invertebrates, fish, mammals, birds, and amphibians, and provides millions of dollars in revenue for surrounding towns in tourism and recreation. However, coastal water bodies such as Barnegat Bay are subject to impacts from coastal storm systems such as hurricanes and tropical storms. My assessment determined how physical water properties and chemistry including water temperature, dissolved oxygen, pH, salinity, turbidity, specific conductance, and chlorophyll A were affected during landfall of Hurricane Sandy on October 29, 2012. Data on these properties was collected from available sources and were analyzed for significance in year-long data before and after hurricane landfall as well as one week before and after landfall in 2012 as compared with 2013. Results suggest that significant changes in water temperature, dissolved oxygen, pH, turbidity and chlorophyll a were observed in the week before compared with after the hurricane, while only significant changes in pH, turbidity and chlorophyll a could be observed in the year-long analysis. These data could be used to encourage further research in impacts to bay systems from coastal storms and to help create restoration plans following a storm system or preventive measures to ensure the health of the bay after major storms.Item Place-based and student-led climate change instruction in the science classroom(Montana State University - Bozeman, College of Letters & Science, 2021) Rendla, Elexa Deidre; Chairperson, Graduate Committee: Greg FrancisClimate change is a global problem affecting everyone living on Earth. In Florida specifically, intense hurricanes are becoming a familiar event. In response to this phenomenon, I designed hurricane lessons to help students understand the link between climate change and increased hurricane intensity. I used place-based and student-led lessons. During these lessons, 14 students attended in-person and 16 students attended online, which was an option for students during the Covid-19 pandemic. In the Hurricane Webquest, students learned about the structure of hurricanes, tracked Hurricane Irma and read about the link between rising sea-surface temperatures and hurricane intensity. For the Thermodynamics PhET Labs, students investigated the links between climate and heat, and energy transfer. In the Thermodynamics Mini-Project, students looked at how thermal energy can be converted into kinetic energy in hurricanes. Finally, in the Hurricane Building Codes Assignment, students investigated local buildings and how they met the Florida hurricane building codes. Both before and after the hurricane lessons, students participated in the Hurricane Likert Survey and took a Hurricane Knowledge Test. Some students also participated in final interview questions once the lessons were concluded. Students indicated in both pre- and post-surveys that they were aware of climate change. After the hurricane lessons, students reported a greater understanding of the relationship between climate change and hurricanes. After students completed the Hurricane Building Codes Assignment, they were better able to articulate their reasons for evacuating or staying during a hurricane. When in-person and online students were compared, their greatest difference was in-class participation. Students attending in-person participated in classroom discussion, and those who attended from home stayed silent.Item The effects of anti-price gouging laws in the wake of a hurricane(Montana State University - Bozeman, College of Agriculture, 2015) Tarrant, Michael Steven; Chairperson, Graduate Committee: Randal R. RuckerThe southeastern coast of the United States is vulnerable to hurricanes and the destruction they cause. Previous literature has explored hurricanes' impacts on growth in coastal counties of the United States, but not the inherently linked effects of anti-price gouging (APG) laws, which prohibit firms from significantly increasing prices during a declared state of emergency. The relationship between APG laws and economic growth following a hurricane is estimated with a fixed effect model and county-level quarterly wage data for the period 1990-2012. Results suggest that hurricane-stricken counties are worse off in the presence of APG laws, with the most pronounced negative effects in the accommodations industry. The deleterious effects of APG laws, however, are short-lived; affected counties appear to rebound once the laws are no longer in effect. As the first paper to empirically examine the economic effects of APG laws, these results counter common political thinking and provide empirical support of standard economic theory regarding price ceilings.