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Theses/Dissertations

2021

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Articles 31 - 35 of 35

Full-Text Articles in Physical and Environmental Geography

Analyzing Perceptions Of Citizen Science As Part Of An International Learning Experience, Katelyn Marie Miner Jan 2021

Analyzing Perceptions Of Citizen Science As Part Of An International Learning Experience, Katelyn Marie Miner

Dissertations and Theses @ UNI

This study focused on a perceptions-based citizen science project that emphasizes meaning over measurement. Specifically, student perceptions of citizen science in a unique location, rather than the specific data outcomes of the water quality citizen science activity were analyzed. Many researchers have used citizen science participants to collect samples from water sources around them, increasing the use of mass data collection for scientific purposes.This study was a mixed-methods design, using triangulation of the pre-survey, modified focus group, and post-survey. The goal was to gauge the perceptions of participants in perceived benefits and gains before and after participating in a water …

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Aeolian Sand Stringers In The Upper Midwest, Usa: Morphology, Stratigraphy, And Paleoenvironmental Significance, Kenzie L. Shandonay Jan 2021

Aeolian Sand Stringers In The Upper Midwest, Usa: Morphology, Stratigraphy, And Paleoenvironmental Significance, Kenzie L. Shandonay

All Graduate Theses, Dissertations, and Other Capstone Projects

Sand stringers are subtle (~1-10 m high), elongate (several km long, up to 100 m wide) aeolian landforms that lack a slip face and generally have a northwest-southeast orientation. They are ubiquitous across the Upper Midwest, including southeast Minnesota and western Wisconsin. Despite their prevalence, the timing, processes, and environmental conditions during sand stringer formation and evolution are poorly understood. This research aims to describe sand stringer morphology and stratigraphy, reconstruct regional paleoclimate, and characterize the timing and geomorphic processes of sand stringer formation and evolution in response to shifts in environmental conditions. This study investigates two sand stringers: Good-1 …

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Examining Patterns And Drivers Of Spatial And Temporal Variability In Playa Hydroperiod In The High Plains Region Of Western Kansas, Luis Lepe Jan 2021

Examining Patterns And Drivers Of Spatial And Temporal Variability In Playa Hydroperiod In The High Plains Region Of Western Kansas, Luis Lepe

All Graduate Theses, Dissertations, and Other Capstone Projects

Playa wetlands are some of the most important natural features of the High Plains of the central United States. Playas provide a range of ecosystem services such as groundwater recharge, surface water storage, and wetland habitat. However, playa functions are declining due to land cover change, climate change, and playa and watershed modifications. There are only a few studies that have examined the variability and controls on playa water storage. This project aims to determine how playa and watershed morphology, watershed land cover, and precipitation patterns affect timing and duration of water storage in 92 playas distributed throughout a 10-county …

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Evaluating St. Catherines Island's Shoreline, Vegetation Line, And The Locations Of Loggerhead Sea Turtle Nests, Sydney O. Davis Jan 2021

Evaluating St. Catherines Island's Shoreline, Vegetation Line, And The Locations Of Loggerhead Sea Turtle Nests, Sydney O. Davis

Electronic Theses and Dissertations

St. Catherines Island is a highly dynamic barrier island on the Georgia coast that is also federally listed critical nesting habitat for loggerhead sea turtles. Understanding how St. Catherines’ shoreline and vegetation is changing over time is geographically important as a potential template for other barrier islands. Measuring sea turtle nest locations will provide insight into their natural patterns and how they adjust those locations on a changing barrier island. Analyzing Moving Boundaries Using R (AMBUR) is implemented in this research to assess the movement of the vegetation and shorelines from 2005-2017 using the End Point Rate (EPR) and Linear …

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Quantifying Carbon Sequestration For Riparian-Zone Restoration In Ecuador, Paula Carvalho De Castro Jan 2021

Quantifying Carbon Sequestration For Riparian-Zone Restoration In Ecuador, Paula Carvalho De Castro

Dissertations and Theses @ UNI

Carbon sequestration supported by carbon pricing and carbon offset programs has the potential to mitigate the risks associated with environmental change. Riparian-zone restoration, beyond enriching degraded ecosystems, promotes carbon sequestration. With that premise, this study aims to estimate and compare how much carbon is captured and stored using six riparian-zone restoration scenarios for the Northwestern part of the Pichincha Province in Ecuador and the economic value of the respective carbon. The InVEST Carbon Storage and Carbon Sequestration Model which integrates land cover maps, carbon pools, and economic value of carbon in currency units was used to quantify the amount of …

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