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Showing 1 to 20 of 559 for “"Marsh"”.
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Spartina Alterniflora Productivity and Salt Marsh Stability Relative to Marsh Platform Elevation
… measured as a function of relative elevation. Marsh surface elevations were extracted from LIDAR data collected in 2003. An optimal elevation for <em>Spartina</em> standing biomass was identified at about 35 cm NAVD88. The upper and lower elevation limits for <em>Spartina</em> are related to …
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Geochronology of salt-marsh sediments
<br/>Salt-marsh sediments can provide important achives of past sea levels if they can besecurely dated. This thesis investigates eight methods for dating salt-marsh sediments.These include traditional and established dating methods (¹⁴C dating and theradionuclides ¹³⁷Cs and ²¹ºPb) and more novel …
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Elements of salt marsh hydrology
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1986.
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Positive interactions in salt marsh conservation
Contains fulltext : 219667.pdf (Publisher’s version ) (Open Access)
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Scaling Up and Exploring Marsh (SUEM)
… as Web-based games. The first game, Scaling Up Marsh Science was developed to create a detailed mosaic of the sampling area by stitching multiple overlapping images. Applying automatic methods for image alignment and stitching did not produce precise results due to various factors such as …
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Effects of marsh grass on diffusivity
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1996.
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Multifunctional experimental assessment in a newly established Mediterranean restored marsh : marsh elevation, carbon accumulation and pollutant concentration reduction
… (Catalonia, Spain) is among the most important marsh areas in the Western Mediterranean Sea, highly valuable both economically and ecologically. Fluvial sediment reduction by dams in a relative sea-level rise (RSLR) scenario (eustatic sea-level rise + subsidence) has increased the delta plain …
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Permanence Amidst Continual Motion: A Marsh Retreat
… explores how a place can be made within a tidal marsh; a place where people can stay and experience being in the marsh. The experience should be able to be en- joyed at any time, day or night, good weather and bad. For this a shelter, a built form, is needed. This built form should have …
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The role of sulfur in salt marsh metabolism
… alterniflora in the Great Sippewissett Salt Marsh is approximately 75 moles S04 m2 year-1. This is the highest rate reported for any natural ecosystem. Sulfate reduction is the most important form of respiration in the marsh and results in the annual consumption of 1800 g C m-2, approximately …
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The 3D Structure of A Salt Marsh Island
<p>Studies have shown marsh topography exerts considerable control on the timing and duration of platform inundation. However, topographic structure of the intertidal salt marsh remains poorly quantified. In this study, I used a survey grade Digital Elevation Model to accurately quantify the …
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Examining Coastal Marsh Sedimentation In Northeastern North Carolina
Coastal marshes are critical environments that are ephemeral on geologic timescales. Understanding the dynamics that naturally maintain these systems is becoming increasingly important in the face of accelerated sea-level rise. Ceramic tiles, radioisotopes (²¹⁰Pb and ¹³⁷Cs), shoreline mapping, and …
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Marsh-Exported Dissolved Organic Matter Fate in Estuaries
… ocean color, and light attenuation. While marshes are largely considered sinks for carbon due to their high productivity and low soil carbon degradation rates, laterally they are sources of carbon as optically and chemically distinct DOM to surrounding aquatic ecosystems; these inputs are …
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Biophysical interactions and stability at salt marsh margins
… regional variability in rates of erosion at salt marsh margins, and, with widespread loss of tidal wetlands, there is a need to better understand the factors which make salt marshes more or less likely to persist over time. The resistance of salt marsh sediments to erosion is influenced by …
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The flow of water in salt marsh peat
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1982.
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Distribution of hydrocarbons in a salt marsh ecosystem after an oil spill and physiological changes in marsh animals from the polluted environment
… problems relating to the recovery of a salt marsh heavily polluted by an accidental spill of Number 2 fuel oil. Field and laboratory studies were conducted for 5 years comparing the oiled Wild Harbor Marsh with the unoiled Sippewissett Marsh, both on Buzzards Bay in Massachusetts. The data …
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Mechanisms of tidal dispersion in a salt marsh estuary
… maintain the salt balance in the North River (Marshfield, MA), a tidally-dominated salt marsh estuary with complex topography. First, a field campaign was conducted to determine the dispersion associated with the out-of-phase exchange between tributary creeks and the main channel. Then, …
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Conservation biology of the marsh fritillary butterfly Euphydryas aurinia
The conservation biology of Euphydryas aurinia was investigated, analysing its metapopulation dynamics, interactions with parasitoids and the efficacy of habitat restoration. Euphydryas aurinia has undergone a widespread national decline in recent years. This decline is quantified at a 10km scale. …
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