Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 126 for “"Salt marsh"”.
-
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 …
-
Elements of salt marsh hydrology
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1986.
-
Positive interactions in salt marsh conservation
Contains fulltext : 219667.pdf (Publisher’s version ) (Open Access)
-
The role of sulfur in salt marsh metabolism
… Spartina 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, …
-
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 …
-
Biophysical interactions and stability at salt marsh margins
… and 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 …
-
The flow of water in salt marsh peat
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1982.
-
Mechanisms of tidal dispersion in a salt marsh estuary
… the mechanisms of dispersion that 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 …
-
Salt marsh substrate composition and responses to applied stress
Salt marshes provide a variety of ecosystem services, including habitat provision, pollutant storage and attenuation of waves and currents. As such, understanding the resistance of the marsh sedimentary platform to erosion is important, particularly as marsh edge erosion is common on many shores. …
-
Mechanisms of Tidal Dispersion in a Salt Marsh Estuary
… the mechanisms of dispersion that 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 …
-
Effects of Pier Shading on Salt Marsh Plants in Mississippi
<p>Saltmarshes are important environments that are valuable to both humans and wildlife. As saltmarshes are under threat from erosion, sea level rise, and human development, efforts should be made to conserve them. The vegetation that occupies these environments are vital to the continued …
-
Spatial Variability of Metals and Organic Carbon In Salt Marsh Sediment
<p>The occurrences of pollutants in salt marsh, especially metals, have been widely studied due to their adverse effects on ecosystem. However, most of the studies use single measurement to assess the metal contamination and ignore the spatial variability of sediment metal concentration. In this …
-
The Geochemistry of Selenium and Sulfur in a Coastal Salt Marsh
… Five cores were obtained from the Great Marsh, from April 1985 to June 1986. Sampling times coincided with the seasonal redox cycle known to occur within the marsh system. Sediments were analyzed for various selenium and sulfur phases.</p> <p>Iron monosulfides and elemental sulfur both …
-
Biotransformation and distribution of selenium in cultures of a salt-marsh yeast
… and volatile fractions of cultures of a salt-marsh yeast isolate, Rhodotorula mucilaginosa-13B. More than 20% of amended selenite accumulated in cell pellets, while 1% was dispersed in volatile form. Elemental selenium only accumulated during the exponential and stationary growth phases …
-
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 …
-
Spartina anglica population and environmental studies within the Solent salt marsh system
… possible causes of decline of Spartina anglica marshes along the south coast of Britain with emphasis on the Solent marshes. The study shows that although there may be some genotypic differences between S. anglica gathered from sites in Britain. The disparities are not large enough to explain …
-
Phenotypic plasticity and population differentiation in Suaeda maritima on a salt marsh
… that in the UK occurs exclusively in coastal salt marshes. The main aim of this study has been to examine the phenotypic variations within and between its populations in the heterogeneous microenvironments of a salt marsh. Detailed field characterizations of the growth, seed production and …
Page 1 of 7