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Title: Nutrient Levels and Organic Matter Decomposition in Response to Prescribed Burns in Mid-Atlantic Coastal Marshes
Authors: Geatz, George Walter
Advisors: Needelman, Brian A.
Department/Program: Environmental Science and Technology
Type: Thesis
Sponsors: Digital Repository at the University of Maryland
University of Maryland (College Park, Md.)
Subjects: Natural resource management
Water resources management
Environmental science
Keywords: Coastal Marsh
Marsh Management
Organic Matter
Prescribed Fire
Issue Date: 2012
Abstract: Prescribed winter burning is a commonly used management practice in coastal marshes along the Atlantic Coast. I conducted a manipulative field study to explore the mechanisms by which fire increases plant productivity. I found that prescribed fire does not provide a fertilization effect for vegetation through ash deposition due to the low amounts of nutrients in ash. Modeling biomass nutrient stocks in other marshes with similar vegetation types shows that this lack of a fertilization effect likely exists across all coastal marsh types. Through the mechanism of canopy removal, organic matter decomposition rates in marsh areas tended to decrease later in the growing season, corresponding with a decrease in porewater ammonium and phosphate, which were taken up in much higher quantities in the biomass. These effects were stronger and more consistent in areas dominated by the sedge species, as these areas showed more of a biomass response to canopy removal.
Appears in Collections:Environmental Science & Technology Theses and Dissertations
UMD Theses and Dissertations

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Geatz_umd_0117N_13262.pdf14.21 MBAdobe PDF306View/Open
GEATZ_FINAL_Publishing_Your_ETD_signed.pdf120.93 kBAdobe PDF132View/Open

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