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This study evaluated surface elevation change and vertical accretion of sediments in hollows and on top of hummocks associated with the base of tree stems in tidal freshwater forested wetlands. Sites were along a gradient of habitat change from freshwater forest to marsh and tracked hollow subsidence and in-filling with transgression over 6 (Virginia) to 12 (South Carolina/Georgia) years. Both deep and shallow Surface Elevation Tables (SETs) were used and compared with accretion of surficial sediments during overlapping assessment periods.
Categories: Data;
Tags: Ecology,
Mattaponi River, Virginia, USA,
Pamunkey River, Virginia, USA,
Savannah River, Georgia, USA,
USGS Science Data Catalog (SDC), All tags...
Waccamaw River, South Carolina, USA,
biota,
hollow,
hummock,
sediment elevation tables,
tidal freshwater rivers, Fewer tags
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Data were collected from coastal wetlands (tidal swamps and marsh) along the Waccamaw and Savannah Rivers in South Carolina and Georgia (See Krauss et al. 2009 for additional details). Data were collected from coastal wetlands (tidal swamps and marsh) along the Waccamaw and Savannah Rivers in South Carolina and Georgia (See Krauss et al. 2009 for additional details). Data collected include water level, porewater salinity (conductivity based), water temperature, and conductivity. First measurements began in 2004 and continued through 2016. Water level data: A network of water level recorders was established in 2004-2006 (forests) and in 2009 (marsh). Continuous hourly data were recorded using vented pressure...
Categories: Data;
Tags: Ecology,
Georgia,
Land Use Change,
Sampit River,
Savannah National Wildlife Refuge, All tags...
Savannah River,
South Carolina,
USGS Science Data Catalog (SDC),
Waccamaw National Wildlife Refuge,
Waccamaw River,
freshwater tidal forest/woodland,
oligohaline tidal marsh,
salinity,
saltwater intrusion,
sea-level change,
wetland ecosystems, Fewer tags
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Abstract (from Nature): “Blue carbon” wetland vegetation has a limited freshwater requirement. One type, mangroves, utilizes less freshwater during transpiration than adjacent terrestrial ecoregions, equating to only 43% (average) to 57% (potential) of evapotranspiration (ET). Here, we demonstrate that comparative consumptive water use by mangrove vegetation is as much as 2905 kL H2O ha−1 year−1 less than adjacent ecoregions with Ec-to-ET ratios of 47–70%. Lower porewater salinity would, however, increase mangrove Ec-to-ET ratios by affecting leaf-, tree-, and stand-level eco-physiological controls on transpiration. Restricted water use is also additive to other ecosystem services provided by mangroves, such as...
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