|
Coastal wetlands are major global carbon sinks, however, they are heterogeneous and dynamic ecosystems. To characterize spatial and temporal variability in a New England salt marsh, static chamber measurements of greenhouse gas (GHG) fluxes were compared among major plant-defined zones (high marsh dominated by Distichlis spicata and a zone of invasive Phragmites australis) during 2013 and 2014 growing seasons. Two sediment cores were collected in 2015 from the Phragmites zone to support previously reported core collections from the high marsh sites (Gonneea and others 2018). Collected cores were up to 70 cm in length with dry bulk density ranges from 0.04 to 0.33 grams per cubic centimeter and carbon content 22.4%...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: 137-cesium,
210-lead,
Cape Cod (606914),
Commonwealth of Massachusetts (606926),
Constant Rate of Supply (CRS) model, All tags...
Ecology,
Masphee (615624),
Sage Lot Pond (616458),
United States of America,
accretion rate,
age model,
biota,
carbon,
carbon burial,
carbon isotope analysis,
coastal processes,
ecological processes,
ecological restoration,
elevation,
environment,
geoscientificInformation,
inlandWaters,
invasive species,
location,
nitrogen,
oceans,
piston coring,
plot sampling,
radiometric dating,
salt marshes,
sea-level change,
sedimentation,
soil chemistry,
wetland ecosystems,
wetland functions,
wetland soils,
wetlands, Fewer tags
|
The accretion history of fringing salt marshes in Narragansett Bay, Rhode Island, was reconstructed from sediment cores. Age models, based on excess lead-210 and cesium-137 radionuclide analysis, were constructed to evaluate how vertical accretion and carbon burial rates have changed during the past century. The Constant Rate of Supply (CRS) age model was used to date six cores collected from three salt marshes. Both vertical accretion rates and carbon burial increased from 1900 to 2016, the year the data were collected. Cores were up to 90 cm in length with dry bulk density ranging from 0.07 to 3.08 grams per cubic centimeter and carbon content 0.71 % to 33.58 %.
Categories: Data;
Tags: 137-cesium,
210-lead,
Almy Brook (1218186),
Constant Rate of Supply (CRS) model,
Geochemistry, All tags...
Mary C Donovan Marsh (1901736),
Mary's Creek (2090042),
Narragansett Bay (1218465),
Prudence Island (1218169),
Rhode Island,
United States of America,
accretion rate,
age model,
carbon burial,
ecological restoration,
environment,
geoscientificInformation,
inlandWaters,
location,
piston coring,
radiometric dating,
salt marsh,
salt marshes,
sea-level change,
sedimentation,
soil chemistry,
wetland ecosystems,
wetland soils,
wetlands, Fewer tags
|
|