Accretion Patterns of Newly Built Marshland Public Deposited

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Last Modified
  • March 19, 2019
Creator
  • Gunnell, John Robert
    • Affiliation: College of Arts and Sciences, Department of Marine Sciences
Abstract
  • Marshes are among the most important ecosystems in the world, but also are rapidly disappearing on a global scale, making it necessary but difficult to understand the processes behind natural marsh building. In this study, 210Pb-derived accretion rates are examined in a marsh at the Newport-River mouth, (NC), a location that has experienced ongoing emergence of new marshland over the past several decades. Accretion rates at all marsh-sampling sites shifted from slow sedimentation emblematic of the bay-bottom to rapid sedimentation that persisted as each site progressed from being an exposed mudflat to eventually becoming a newly colonized marsh table. This transition occurred asynchronously across the marsh and prior to vegetative colonization. This indicates that a physical transition occurred, likely due to a decrease in erosive processes such as wave-stirring. Creating a local regime of quiescence, these transitions promoted accretion and initiated marsh building that continues today.
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  • In Copyright
Note
  • "... in partial fulfillment of the requirements for the degree of Master of Science in the Department of Marine Sciences."
Advisor
  • McKee, Brent
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Place of publication
  • Chapel Hill, NC
Access
  • Open access
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