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The decline of Taxodium distichum, bald cypress, forests along the Gulf Coast of North America is partly due to elevation loss and subsequent flooding. In many coastal wetlands, a common approach for coastal restoration is to rebuild elevation through the application of dredge spoil, but this technique has not been used widely in coastal forests due to concerns of negatively impacting trees. This experiment explored health responses of Nyssa aquatica, water tupelo, and T. distichum saplings to applications of low salinity dredge spoil in a greenhouse setting. Compared to controls, saplings of T. distichum grown in 7 and 15 cm sediment depths had higher final heights, and stem and total biomass while N. aquatica...
Categories: Data;
Types: Citation;
Tags: Ecology,
Lafayette, Lafayette Parish, Louisiana,
Sediment application,
Subsidence,
USGS Science Data Catalog (SDC),
It contains supporting data from the wetland morphology modeling to support the analysis on the landscape effects of Mississippi River diversions in the context of sea-level rise on soil organic carbon (SOC) sequestration along coastal Louisiana wetlands.
Categories: Data;
Types: Citation;
Tags: Barataria Basin,
Breton Sound Basin,
Ecology,
Jefferson Parish,
Louisiana,
Rising sea levels threaten the sustainability of coastal wetlands around the globe, thus understanding how increased inundation alters the elevation change mechanisms in these systems is increasingly important. Typically, the ability of coastal marshes to maintain their position in the intertidal zone depends on the accumulation of both organic and inorganic materials, so one, if not both, of these processes must increase to keep pace with rising seas, assuming all else constant. To determine the importance of vegetation in these processes, we measured elevation change and surface accretion over a 4-year period in recently subsided, unvegetated marshes, resulting from drought-induced marsh dieback, in paired planted...
Categories: Publication;
Types: Citation;
Tags: Accretion,
Coastal wetland,
Forests,
Grasslands and Plains,
Landscapes,
The U.S. Geological Survey in cooperation with the Harris-Galveston Subsidence District, City of Houston, Fort Bend Subsidence District, and Lone Star Groundwater Conservation District created this dataset that provides water‐level measurements, altitudes, and changes in water-level altitudes in the Chicot, Evangeline, and Jasper aquifers in the Houston‐Galveston region, Texas. The dataset shows current-year (2016-17) water-level altitudes, depth to water, and 1-year (2016-17) water-level changes of select wells screened in the Chicot, Jasper, or Evangeline aquifers. The water‐level measurements in the dataset are built upon and stored in the National Water Information System: Web Interface, groundwater information,...
Types: Citation;
Tags: Brazoria County,
Chambers County,
Chicot aquifer,
Evangeline aquifer,
Fort Bend County,
To avoid submergence during sea-level rise, coastal wetlands build soil surfaces vertically through accumulation of inorganic sediment and organic matter. At climatic boundaries where mangroves are expanding and replacing salt marsh, wetland capacity to respond to sea-level rise may change. To compare how well mangroves and salt marshes accommodate sea-level rise, we conducted a manipulative field experiment in a subtropical plant community in the rapidly subsiding Mississippi River Delta. Experimental plots were established in spatially equivalent positions along creek banks in monospecific stands of Spartina alterniflora (smooth cordgrass) or Avicennia germinans (black mangrove) and in mixed stands containing...
Categories: Data;
Types: Citation;
Tags: Ecology,
Geomorphology,
Louisiana,
Port Fourchon,
USGS Science Data Catalog (SDC),
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