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Showing 1 to 20 of 40 for “"Saltmarsh"”.
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Modeling Saltmarsh Sparrow Distribution in Connecticut
<p>To develop a map that would predict where saltmarsh sparrows live and reproduce in Connecticut, I compared models to test a) whether field data or remote-sensing data most effectively characterized within-marsh conditions that relate to sparrow occurrence, and b) whether including …
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Data-driven prediction of saltmarsh morphodynamics
Saltmarshes provide a diverse range of ecosystem services and are protected under a number of international designations. Nevertheless they are generally declining in extent in the United Kingdom and North West Europe. The drivers of this decline are complex and poorly understood. When considering …
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Mechanisms for accumulation and migration of technetium-99 in saltmarsh sediments
… input, migration and accumulation in saltmarshes. The inventory of <sup>99</sup>Tc stored in the Thornflatt Saltmarsh, Esk Estuary has also been determined. The routine determination of <sup>99</sup>Tc in bulk samples uses <sup>99m</sup>Tc as a yield monitor. Samples are ignited …
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The migration and accumulation of radionuclides in the Ravenglass saltmarsh, Cumbria, UK
… in four corescollected from the Ravenglass saltmarsh, Cumbria and one core collected from the Irish Sea, near the effluent pipeline of the Sellafield nuclear reprocessing plant. Major and trace elements have also been measured to look at the effects of sediment composition and any redox …
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Spatial analysis of blue carbon in a UK Saltmarsh: Implications of carbon distribution.
In recent years saltmarshes have been found to be significant stores of blue carbon with important links to the global carbon cycle. Saltmarshes have the ability to sequester a significant amount of carbon with long residence times once buried. In this investigation, the spatial distribution of …
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Ecology and physiology of bacterial activity in a temperate saltmarsh lagoon, with an emphasis on nitrogen fixation
… to nutrient regeneration and nitrogen cycling in saltmarsh ecosystems. Ecological and physiological aspects of bacterial production and nitrogenase activity in marine sediments and water were examined in Langebaan Lagoon, a temperate saltmarsh ecosystem. Emphasis was placed on factors modulating …
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Projections of Mangrove, Saltmarsh, and Oyster Reef Viability in the US East Coast and their Role in Coastal Defense
… project the possible extent of mangrove forests, saltmarshes, and oyster reefs in the southeast and mid-Atlantic coasts of the United States (South Carolina, North Carolina, Virginia, and Maryland) through the end of the 21st century. These projections are based on several climatic scenarios …
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Some Effects of Screens and Screen Treatments in Retarding Entry of the Common Saltmarsh Sandfly or Punkie, Culicoides Furens (Poey). Diptera: Heleidae
Made available in DSpace on 2014-12-05T21:33:53Z (GMT). No. of bitstreams: 1 0013544.pdf: 3268797 bytes, checksum: 1614817a2604166f111d32ea4a803f4b (MD5) Previous issue date: 1955
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Spatial and temporal variability of carbon stocks within the River Colne Estuary
Saltmarshes are one of the most significant blue carbon sinks but there is a paucity of information regarding saltmarsh carbon stocks globally, consequently these habitats are not included in the global carbon budget. The aim of this study is therefore to better understand the spatial and temporal …
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Ecological Community Changes and Ecosystem Functioning During Structured Wetland Development
Saltmarshes provide important ecosystem services, including protection from tidal inundation, grazing for livestock, resources for birds and breeding grounds for fish. After a long history of saltmarsh reclamation there is now emphasis on restoration of existing or destroyed saltmarshes to provide …
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A wetland vulnerability assessment : consequences for the avian communities of saltmarshes
… these consequences for the avian communities of saltmarshes and associated reed beds. The research has four objectives: to classify saltmarsh and reed bed vegetation distribution; to assess the vulnerability of these habitats to sea level rise; to determine the impacts of sea level rise on …
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THE IMPACT OF SEA-LEVEL RISE ON COASTAL WETLANDS USING IN-SITU MESOCOSM EXPERIMENTS, LANDSCAPE MODELING, AND TRADITIONAL ECOLOGICAL KNOWLEDGE MAPPING
… of inundation and nitrogen on two commonly found saltmarsh species,<em> Spartina alterniflora </em>and <em>Spartina patens</em>. I examined productivity and metrics to these stressors using a controlled mesocosm experiment in the western channel of the Pascagoula River, Mississippi. I found …
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Environmental and biochemical controls on the molecular distribution and stable isotope composition of leaf wax biomarkers
… n-alkane composition, leaf waxes from seven UK saltmarsh plants were analysed over two growing seasons. Linked analysis of sedimentary n-alkanes enabled further investigation of leaf wax biomarker integration into saltmarsh sediments. The molecular distribution and concentration of n-alkanes …
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Use of carbon isotope and C/N geochemistry in reconstructing vegetation communities: a mid- to late- Holocene palaeoenvironmental investigation from Romney Marsh, Kent, UK
… communities, particularly alder carr and saltmarsh. Romney Marsh is a large, extensively studied reclaimed coastal wetland in south east England containing a 2-metre thick peat layer that formed between c. 5500-1500 cal. yrs. BP. The palynological data from two mid- to late- Holocene …
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The determination of pure beta-emitters and their behaviour in a salt-marsh environment
… levels of anthropogenic pure beta-emitters in a saltmarsh sediment core collected from the Esk Estuary in Cumbria. Analysis of the four beta emitting radioisotopes was complemented by the analysis of major elements, trace elements and gamma emitting radioisotopes. This information was used to …
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Impacts of coastal realignment on intertidal sediment dynamics: Freiston Shore, the Wash
… of land reclamation and managed realignment on saltmarsh and the adjacent intertidal flats at Freiston Shore (The Wash) are investigated. The hydrodynamic and sediment dynamics over the intertidal flats and a managed realignment site are discussed, with an extensive set of hydrodynamic, sediment …
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Investigation of salinity and nutrient characteristics of two groundwater based flow systems on Virginia's Eastern Shore
… a 300 meter wide mesic forest, 300 meter wide saltmarsh, and 550 meters offshore into Magothy Bay. Wells in the surficial, Columbia aquifer were screened over 30 centimeters at depths of 3.05, 9.14, and 15.25 meters below the surface. Most monitoring sites consisted of clusters of multiple …
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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 …
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Habitat use and energetics of American black ducks wintering at Chincoteague, Virginia
… 1986-87) over a time-tide matrix within refuge, saltmarsh, and tidal water habitats. Sixty-four ducks were collected during early, mid, and late winter in 1985-86 to determine changes in carcass composition. The Habitat Suitability Index (HSI) model for wintering black ducks was evaluated. Age …
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Microplastics in saltmarshes: developing extraction methods and examining past accumulation
Saltmarshes are complex, dynamic environments, which play a vital role in protecting both humans and wildlife, by acting as a natural barrier against coastal erosion and flooding, and providing habitats for a diverse range of biota. However, the sources and accumulation of microplastics on …
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