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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 184 for “"Marshes"”.
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Species richness in reed marshes
Contains fulltext : 146655.pdf (Publisher’s version ) (Open Access)
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Plant-habitat interactions in brackish marshes
Estuarine marshes are ecosystems that are situated at the transition zone between land and water and are thus controlled by physical and biological interactions. Marsh vegetation offers important ecosystem services by filtrating solid and dissolved substances from the water and providing habitat. …
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Carbon Sequestration in Tidal Salt Marshes and Mangrove Ecosystems
… fixation, production and storage in tidal salt marshes and mangrove ecosystems. The results showed that both coastal wetland ecosystems types are a significant carbon pools compared to other terrestrial ecosystems. Global estimations indicated that carbon storage in coastal wetlands ranges from …
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Towards Characterisation and Classification of Canadian Macrotidal Salt Marshes
… the extent, distribution, and condition of tidal marshes in Canada, they have yet to be comprehensively mapped. Existing inventories show significant overestimation of Canadian tidal marsh extent, indicating that a regional model may be required. This thesis provides a review of freely available …
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Storm signatures in coastal ponds and marshes over the late Holocene
… the impacts of storms on coastal ponds and marshes along the eastern coast of the United States. Tropical cyclones and other storms have been shown to cause a spectrum of effects on these coastal systems, ranging from widespread erosion to deposition of thick sediment deposits. Sediments …
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The Aquatic Ecology of Two Seasonal Marshes in Eastern South Dakota
… the physical-chemical limnology of two seasonal marshes in eastern South Dakota were monitored from April-June 1975. Bothwell and Lund Marshes contained water from 15 April-July 1975. The dominant i. ons, Ca ++, Mg+ +, and sulfate, made the water hardness non-carbonate. Floating vegetation, Lemna …
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Water Column Productivity, Calcite Precipitation, and Phosphorus Dynamics in Freshwater Marshes
… full-scale 1-ha created experimental freshwater marshes and in twenty 1-m2 experimental mesocosms in central Ohio. Water, algae, and sediment samples were taken from July 1998 to May 1999 at sitesfrom the inflow to the outflow of the marshes. Diurnal dissolved oxygen data taken every half-hour …
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Developing tools to identify factors that limit production in coastal marshes
… areas around the world. In Louisiana’s coastal marshes, where Spartina patens is the most common plant, restoration and management seek to slow wetland loss rates that average approximately 77.4 km2/year. To combat the problem, scientists and managers require tools to determine local causes and …
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Predicting Plant Zonation in the Salt and Brackish Marshes of Georgia
<p>Tidal marshes provide important economic and environmental functions. There are 1,745 km<sup>2</sup> of tidal marsh habitat along the Georgia coast that can be separated into three distinct marsh types based on salinity levels. Tidal fresh, brackish, and salt marshes occur along a gradient that …
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Storm signatures in coastal ponds and marshes over the late Holocene
… the impacts of storms on coastal ponds and marshes along the eastern coast of the United States. Tropical cyclones and other storms have been shown to cause a spectrum of effects on these coastal systems, ranging from widespread erosion to deposition of thick sediment deposits. Sediments …
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Soil Buoyancy as a Potential Indicator of Hurricane Susceptibility in Louisiana Marshes
… restoration projects create marsh similar to marshes that are more susceptible to hurricane damage. This study analyzes soil, bulk density, plant composition, and buoyancy of restoration projects and sites adjacent to those that experienced land loss during Hurricanes Katrina and Rita. Results …
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Ecological effects of ditching and ditch-plugging in New England salt marshes
<p>Anthropogenic activities in New England salt marshes have altered hydrologic flows in various ways, but unintended consequences from some of these habitat modifications have received little attention. Specifically, ditches have existed on salt marshes for decades, but the effects of these …
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The role of denitrification in the nitrogen cycle of New England salt marshes
I used direct measurements of nitrogen gas (N2) fluxes and a 15N stable isotope tracer to determine the contribution of denitrification to salt marsh sediment N cycling. Denitrification in salt marsh tidal creekbottoms is a major sink for groundwater nitrate of terrestrial origin. I studied …
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Peat hydrology in two New England salt marshes : a field and model study
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil Engineering, 1981.
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The role of denitrification in the nitrogen cycle of New England salt marshes
I used direct measurements of nitrogen gas (N₂ fluxes and a ¹⁵N stable isotope tracer to determine the contribution of denitrification to salt marsh sediment N cycling. Denitrification in salt marsh tidal creekbottoms is a major sink for groundwater nitrate of terrestrial origin. I studied …
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Accumulation of sediment and radionuclides in tidal marshes of the Murderkill River Estuary, Delaware
… 90% of United States Atlantic East coast salt marshes have been ditched to some degree, but little quantitative work has been done to examine the specific effects on marsh sedimentary processes. An understanding how these ditches have affected sediment delivery to and retention on the marsh …
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Nutrient constraints on plant community production and organic matter accumulation of subtropical floating marshes
… Later in the delta cycle, freshwater floating marshes become increasingly removed from external sediment subsidy and internal nutrient cycling controls plant productivity and organic matter accumulation. An interesting question is whether increased external nutrient loading can affect the basic …
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