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Showing 1 to 19 of 19 for “"coastal marshes"”.
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Developing tools to identify factors that limit production in coastal marshes
… in many 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 …
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Upland Migration of Coastal Marshes as a Response to Sea Level Rise and Fire Management: Past, Present, and Predicted
<p>Coastal marshes are one of the most productive and intensively used ecosystems in the world. However, they are under threat due to natural and anthropogenic stressors, such as sea level rise (SLR). SLR can cause marshes to drown, converting them to open water. Marshes can respond to SLR through …
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Influence of Altitude and Scan Angle on UAS-LiDAR Ground Height Measurement Accuracy in Juncus roemerianus Scheele (Black Needle Rush)-dominated Marshes
<p>Coastal marshes are influenced by complex interactions among environmental and human factors. Marsh plant communities exist across subtle elevation gradients which are highly influenced by the local tidal regime. To better understand these dynamic conditions, improved methodologies for acquiring …
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RESPONSE OF A SPARTINA PATENS-DOMINATED OLIGOHALINE MARSH TO NITROGEN ENRICHMENT IN COASTAL NORTH CAROLINA, USA.
Coastal marshes are highly productive ecosystems that play a significant role in the global carbon budget. Anthropogenic alterations to coastal landscapes can significantly impact these marsh ecosystems, though the actual loss of ecosystem functioning may depend on the type of marsh being impacted. …
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Relationship between coastal vegetation biomass with elevation and salinity gradients
… damage to property and loss of life in coastal areas. Vegetation in wetlands and coastal fringes can reduce storm surges and waves while complementing traditional coastal defense approaches such as permanent levees, seawalls and gates. The effectiveness of marsh vegetation in attenuating …
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Effects of body size on goose behavior: lesser snow goose and Ross's goose
… that both adult and juvenile snow geese from coastal marshes had larger bodies and bills than did those from rice-prairie habitats. Adult snow geese from coastal marshes spent more time feeding than did those in rice-prairies, whereas the opposite was true for juveniles. I conclude that snow …
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Vegetative Response to Hurricane Sedimentation
… hurricane sedimentation may benefit subsiding coastal marshes by stimulating aboveground vegetation mass as well as soil organic matter volume. However, these results imply that there may be a sediment thickness threshold that must be met before such positive effects are expressed.
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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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Linkages between Marsh Fragmentation, Prey Availability, and Blue Crab (<i>Callinectes sapidus</i>) Abundance and Mortality
<p>Coastal marshes are important nursery habitats for many commercially important invertebrate species, yet these marshes are being lost worldwide at an unprecedented rate due to subsidence, erosion, climate change, and human activity. As marsh is lost, it creates the opportunity for submerged …
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Sedimentology and Shallow Groundwater Responses of a Coastal Marsh Along a Salinity Gradient: A Case Study In Grand Bay National Estuarine Research Reserve, Mississippi
… in saltwater intrusion and inundation of coastal marshes. This study investigates factors affecting marsh hydrology, including sediment composition, seasonal variability, and coastal storms in Grand Bay National Estuarine Research Reserve (NERR) near Pascagoula, Mississippi. Analysis of …
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Evaluating Marsh Restoration Success Using Structural and Trophic Metrics on Deer Island, MS
<p>Coastal marshes in the northern Gulf of Mexico provide essential habitat for various consumer species, however, land loss has severely degraded marsh habitat in this region. Few studies have examined restored black needlerush (<em>Juncus roemerianus</em>) marshes, such as those found in …
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Keeping Pace with Relative Sea Level Rise: Marsh Platform Monitoring Shows Minimal Sediment Deficit along the Louisiana Coast
<p>Recent reports estimate that the marshes of the Mississippi Delta receive just 30% of the sediment necessary to sustain current land area1. An extensive monitoring campaign by the USGS and LCPRA provides direct measurements of sediment accumulation, subsidence rates, and deposit characteristics …
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Biogeochemical heterogeneity in the salt marsh pools of the north Norfolk coast
… presents a study of pools found on the salt marshes of the north Norfolk coast, whose sediments have previously been observed to be extremely geochemically heterogeneous on small spatial scales. The work tests the hypothesis that the larger geomorphic features of the marsh exert a spatial …
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Life History Divergence & Tidal Salt Marsh Adaptations of the Coastal Plain Swamp Sparrow
… season length, salinity and tidal flow of the coastal marshes relative to inland wetlands has resulted in a number of adaptations among coastal sparrows due to natural selection, sexual selection, and phenotypic plasticity. Specifically I examine the habitat preferences of the coastal plain …
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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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Mapping and Modeling the Seattle Fault Tsunami Inundation in Puget Sound
<p>Coastal communities of Puget Sound are susceptible to tsunami inundation from multiple sources. Two sources of potential tsunami hazard that threaten the region are earthquakes on crustal faults in the Puget Lowlands, or earthquakes originating on the Cascadia subduction zone. This study …
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Determining the Status and Distribution of the Eastern Black Rail (Laterallus jamaicensis) in Coastal Texas
… a small and secretive marsh bird that inhabits coastal high marshes and freshwater wetlands throughout the Americas and is a species of conservation concern. In Texas, winter migrant and breeding populations of the eastern black rail (L. j. jamaicensis) are known to occur in disjunct wetlands …
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Spring Landbird Migration along the Northern Coast of the Gulf of Mexico: Multi-Scaled Investigation of Stopover Ecology Within an Urbanized Landscape
… Gulf coast during spring and fall passage. These coastal landscapes are some of the most rapidly developing areas in the U.S. with population growth rates five times higher than that of inland areas. Anthropogenic pressures, along with human-created (e.g., oil spills) and natural disturbances …
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Vegetation-environment relationships in a subalpine wet meadow and a brackish tidal marsh
… is resident to many species common to Pacific coastal marshes. The lower zone is a mono specific stand of Carex lvnqbvei that is exposed to high-low tide alternation which may remove organic content, sand, and deposit clay. Salinity did not share strong correlative relationships with the …