Research Ecologist
Email:
staggc@usgs.gov
Office Phone:
337-266-8537
Fax:
337-266-8586
ORCID:
0000-0002-1125-7253
Location
700 Cajundome Blvd.
Lafayette
, LA
70506
US
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This dataset provides maps of biomass carbon (C) in gC/m2 of coastal herbaceous wetlands at a resolution of 30 m across the conterminous United States (CONUS) for 2015.
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In recent decades the encroachment of woody mangrove species into herbaceous marshes has been documented along the U.S. northern Gulf of Mexico coast. These species shifts have been attributed primarily to rising sea levels and warming winter temperatures, but the role of elevated atmospheric carbon dioxide (CO2) and water availability may become more prominent drivers of species interactions under future climate conditions. In this greenhouse study we examined the effects of CO2 concentration (ambient, elevated) and water regime (drought, saturated, flooded) on early growth of the mangrove species Avicennia germinans and Spartina alterniflora, a herbaceous grass.
Categories: Data;
Tags: Avicennia germinans,
Biota,
Botany,
Ecology,
Lafayette, La, All tags...
Louisiana,
Spartina alterniflora,
USGS Science Data Catalog (SDC),
atmospheric carbon dioxide,
drought,
greenhouse experiment,
greenhouse gases,
mangrove encroachment,
mangroves,
salt marshes,
species interactions,
vegetation,
water availability, Fewer tags
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The Mississippi River Deltaic Plain has extensive marsh habitats (fresh, intermediate, brackish, and saline) where soil cores were collected to a depth of 100 cm at 24 sites to assess long-term carbon accumulation rates and coast-wide burial rates. Each core was sectioned into 2-cm depth intervals, and select intervals were analyzed for percent moisture, bulk density, total carbon, and radionuclide (137Cs and 210Pb).
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Above- and belowground production in coastal wetlands are important contributors to carbon accumulation and ecosystem sustainability. As sea level rises, we can expect shifts to more salt-tolerant communities, which may alter these ecosystem functions and services. Although the direct influence of salinity on species-level primary production has been documented, we lack an understanding of the landscape-level response of coastal wetlands to increasing salinity. What are the indirect effects of sea-level rise, i.e. how does primary production vary across a landscape gradient of increasing salinity that incorporates changes in wetland type? We measured above- and belowground production in four wetland types that span...
Categories: Data;
Types: Citation,
Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Barataria Basin,
Louisiana,
Terrebonne Basin,
aboveground production,
belowground production, All tags...
climate change,
coastal wetlands,
landscape scale,
salinity gradient,
sea-level rise,
wetland type, Fewer tags
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