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Collection, analysis, and age-dating of sediment cores from salt marshes on the south shore of Cape Cod, Massachusetts, from 2013 through 2014 The accretion history of fringing salt marshes located on the south shore of Cape Cod is reconstructed from sediment cores collected in low and high marsh vegetation zones. These marshes are micro-tidal, with a mean tidal range of 0.442 m. Their location within protected embayments and the absence of large rivers results in minimal sediment supply and a dominance of organic matter contributions to sediment peat. Age models based on 210-lead and 137-cesium are constructed to evaluate how vertical accretion and carbon burial rates have changed over the past century. The continuous rate of supply age model was used to age date 11 cores (10 low marsh and 1 high marsh) across four salt marshes. Both vertical accretion... Categories: Data; Tags: 137-cesium, 210-lead, Barnstable County, Cape Cod, Commonwealth of Massachusetts, All tags... Eel Pond, Environmental Health, Falmouth, Geochemistry, Great Pond, Hamblin Pond, Sage Lot Pond, Soil Sciences, United States of America, Waquoit Bay, Water Quality, Water Resources, accretion rate, carbon, carbon burial, carbon isotope analysis, elevation, geoscientificInformation, high marsh, location, low marsh, nitrogen, oceans, piston coring, radiometric dating, salt marsh elevation, sea-level change, sedimentation, soil chemistry, Fewer tags Static chamber gas fluxes and carbon and nitrogen isotope content of age-dated sediment cores from a Phragmites wetland in Sage Lot Pond, Massachusetts, 2013-2015 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 Time-series of biogeochemical and flow data from a tidal salt-marsh creek, Sage Lot Pond, Waquoit Bay, Massachusetts, 2012-2016 (ver. 2.0, July 2023) Extended time-series sensor data were collected between 2012 and 2016 in surface water of a tidal salt-marsh creek on Cape Cod, Massachusetts. The objective of this field study was to measure water chemical characteristics and flows, as part of a study to quantify lateral fluxes of dissolved carbon species between the salt marsh and estuary. Data consist of in-situ measurements including: salinity, temperature, pH, dissolved oxygen, redox potential, fluorescent dissolved organic matter, turbidity and chlorophyll. Surface water flow, water level and water elevation data were also measured. The data provided in this release represent a compiled data set consisting of multiple sensor deployments between 2012 and 2016. Categories: Data, Data Release - Revised; Tags: Barnstable County, Cape Cod, Commonwealth of Massachusetts, Falmouth, Geochemistry, All tags... Marine Geology, Sage Lot Pond, Waquoit Bay, Water Quality, acoustic doppler current profiling, biochemistry, chlorophyll, dissolved organic matter, inlandWaters, low and intermediate salt marsh, oceans, salinity, salt marshes, surface-water level, time series datasets, turbidity, water chemistry, water properties, water quality, water temperature, wetland ecosystems, Fewer tags Geochemical Data Supporting Analysis of Fate and Transport of Nitrogen in the Nearshore Groundwater and Subterranean Estuary near East Falmouth, Massachusetts, 2015-2016 Geochemical data were obtained to investigate the fate and transport of nitrogen in a subterranean estuary near East Falmouth, Massachusetts. The goal of this investigation was to assess nitrogen attenuation in the aquifer under the Eel River Estuary and the adjacent peninsula that was densely populated with residences having septic systems and legacy cesspool inputs of inorganic nitrogen. This estuary is one of many small embayments on Cape Cod where nutrient enrichment can lead to eutrophication and is a major concern for water-quality impairment. Groundwater water-quality data were collected from 3 transects from a total of 27 locations that were sampled between November 2015 and October 2016. Samples were... Categories: Data; Tags: Cape Cod, Massachusetts, Eel River, Massachusetts, Sea Coast Shores, East Falmouth, Massachusetts, USGS Science Data Catalog (SDC), Water Quality, All tags... biogeochemical cycling, geochemical processes, groundwater flow, groundwater level, groundwater quality, nutrient cycling, Fewer tags Collection, analysis, and age-dating of sediment cores from Herring River wetlands and other nearby wetlands in Wellfleet, Massachusetts, 2015–17 The Herring River estuary in Wellfleet, Cape Cod, Massachusetts, has been tidally restricted for more than a century by a dike constructed near the mouth of the river. Upstream from the dike, the tidal restriction has caused the conversion of salt marsh wetlands to various other ecosystems including impounded freshwater marshes, flooded shrub land, drained forested upland, and brackish wetlands dominated by Phragmites australis. This estuary is now managed by the National Park Service, which plans to replace the aging dike and restore tidal flow to the estuary. To assist National Park Service land managers with restoration planning, the U.S. Geological Survey collected fourteen sediment cores from different ecosystems... Categories: Data; Tags: 137-cesium, 210-lead, Barnstable County (606927), Cape Cod (606914), Cape Cod National Seashore (606900), All tags... Commonwealth of Massachusetts (606926), Constant Rate of Supply (CRS) model, Duck Creek (616758), Geochemistry, Herring River (616776), Town of Wellfleet (618261), United States of America, Wellfleet Harbor (616838), accretion rate, age model, carbon, carbon burial, carbon isotope analysis, ecological restoration, elevation, environment, geoscientificInformation, inlandWaters, location, nitrogen, oceans, piston coring, radiometric dating, salt marshes, sea-level change, sedimentation, soil chemistry, wetland ecosystems, wetland soils, wetlands, Fewer tags Continuous Water Level, Salinity, and Temperature Data from Monitoring Wells in Wetlands on the South Shore of Cape Cod, Massachusetts, 2020 Environmental parameters affecting plant productivity and microbial respiration, such as water level, salinity, and groundwater temperature included in these datasets, are key components of wetland carbon cycling, carbon storage, and capacity to maintain elevation. Data were collected to (1) provide background data to evaluate potential differences in water level and carbon flux between wetland sites with differing elevation and tidal inundation and (2) facilitate applications of Blue Carbon projects in coastal wetlands. Associated child pages include continuous water level, salinity, and temperature from shallow wells installed in coastal wetland sites on Cape Cod, Massachusetts. These datasets are grouped by the... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Barnstable County (606927), CTD measurement, Cape Cod (606914), Commonwealth of Massachusetts (606926), Sage Lot Pond (616548), All tags... Town of Mashpee (618256), United States of America (1890467), atmospheric pressure, ecological restoration, environment, field experiments, field inventory and monitoring, groundwater level, inlandWaters, salinity, salt marshes, water level measurements, water temperature, wetland ecosystems, wetland soils, wetlands, Fewer tags Collection, analysis, and age-dating of sediment cores from natural and restored salt marshes on Cape Cod, Massachusetts, 2015-16 Nineteen sediment cores were collected from five salt marshes on the northern shore of Cape Cod where previously restricted tidal exchange was restored to part of the marshes. Cores were collected in duplicate from two locations within each marsh complex: one upstream and one downstream from the former tidal restriction (typically caused by an undersized culvert or a berm). The unaltered, natural downstream sites provide a comparison against the historically restricted upstream sites. The sampled cores represent a chronosequence of restoration occurring between 2001–10. Collected cores were up to 168 cm in length with dry bulk density ranging from 0.04 to 2.62 grams per cubic centimeter and carbon content 0.12 %... Categories: Data; Tags: Barnstable County (606927), Bass Creek (617465), Boat Meadow River (616844), Cape Cod (606914), Cape Cod Canal (619536), All tags... Commonwealth of Massachusetts (606926), Constant Rate of Supply (CRS) model, Dock Creek (616591), Geochemistry, Mill Creek (616621), Sagamore Beach (617797), Scusset Beach (616340), Town of Bourne (619412), Town of Eastham (619414), Town of Orleans (618257), Town of Sandwich (618259), United States of America, accretion rate, age model, carbon, carbon burial, carbon isotope analysis, cesium-137, ecological restoration, elevation, environment, geoscientificInformation, inlandWaters, lead-210, location, nitrogen, oceans, piston coring, radiometric dating, salt marsh, salt marshes, sea-level change, sedimentation, soil chemistry, wetland ecosystems, wetland soils, wetlands, Fewer tags Continuous and optimized 3-arcsecond elevation model for the United States west coast (32-bit GeoTiff, geographic, NAD83) Investigations of coastal change and coastal resources often require continuous elevation profiles from the seafloor to coastal terrestrial landscapes. Differences in elevation data collection in the terrestrial and marine environments result in separate elevation products that may not share a vertical datum. This data release contains the assimilation of multiple elevation products into a continuous digital elevation model at a resolution of 3-arcseconds (approximately 90 meters) from the terrestrial landscape to the seafloor for the contiguous U.S., focused on the coastal interface. All datasets were converted to a consistent horizontal datum, the North American Datum of 1983, but the native vertical datum for... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry, CMGP, California, Coastal and Marine Geology Program, DEM, All tags... Depth, Digital Bathymetry, Elevation, Gridded Data, Gulf of the Farallones, Monterey Bay, Morphology, NED, NOAA, National Oceanic and Atmospheric Association, Oregon, Puget Sound, San Francisco Bay, Sea Floor, Sea Floor Topography, U.S. Geological Survey, USGS, United States, WHCMSC, Washington, Woods Hole Coastal and Marine Science Center, digital elevation models, elevation, geoscientificInformation, geospatial datasets, oceans, Fewer tags Eddy covariance fluxes of carbon dioxide and methane from the Herring River in Wellfleet, MA (ver 2.0, June 2022) Saline tidal wetlands are important sites of carbon sequestration and produce negligible methane (CH4) emissions due to regular inundation with sulfate-rich seawater. Yet, widespread management of coastal hydrology has restricted vast areas of coastal wetlands to tidal exchange. These ecosystems often undergo impoundment and freshening, which in turn cause vegetation shifts like invasion by Phragmites, that affect ecosystem carbon balance. Understanding controls of carbon exchange in these understudied ecosystems is critical for informing climate consequences of blue carbon restoration and/or management interventions. Here we present measurements of net ecosystem exchange of carbon dioxide (CO2) and methane, along... Categories: Data; Tags: Barnstable County (606927), Cape Cod (606914), Cape Cod National Seashore (606900), Commonwealth of Massachusetts (606926), Herring River (616776), All tags... biota, brackish marsh, carbon, carbon dioxide flux, climatologyMeteorologyAtmosphere, ecological processes, ecological restoration, ecology, eddy covariance, environment, geoscientificInformation, invasive species, methane flux, net ecosystem exchange, salt marshes, wetland ecosystems, wetland functions, wetlands, Fewer tags Nearshore groundwater seepage and geochemical data measured in 2015 at Guinea Creek, Rehoboth Bay, Delaware Assessment of biogeochemical processes and transformations at the aquifer-estuary interface and measurement of the chemical flux from submarine groundwater discharge (SGD) zones to coastal water bodies are critical for evaluating ecosystem service, geochemical budgets, and eutrophication status. The U.S. Geological Survey and the University of Delaware measured rates of SGD and concentrations of dissolved constituents, including nitrogen species, from recirculating ultrasonic and manual seepage meters, and in nearshore groundwater, on the southern shore of Guinea Creek, an estuarine tributary of Rehoboth Bay, in Millsboro, Delaware, in June, August, and October of 2015. A novel oxygen- and light-regulated seepage... Categories: Data; Tags: Delaware, Delmarva Peninsula, Geochemistry, Guinea Creek, Millsboro, All tags... Rehoboth Bay, Soil Sciences, United States, Water Quality, biogeochemical cycling, dissolved organic carbon, dissolved oxygen, environment, eutrophication, geochemistry, geoscientificInformation, groundwater chemistry, groundwater seepage, nitrogen, salinity, trace elements, water chemistry, water quality, Fewer tags Inventory of Managed Coastal Wetlands in Delaware Bay and Delaware's Inland Bays This data release contains areas within Delaware Bay and Delaware Inland Bays that are within tidal elevations, as determined by the Highest Astronomical Tide (HAT), but that are classified as non-tidal or managed wetlands by the National Wetlands Inventory (NWI) or as non-estuarine by the 2016 Coastal Change Analysis Program (C-CAP) land cover dataset. These areas have been assigned the classification codes of NWI, where available, and C-CAP. These data are based on a 5m resolution elevation raster from Coastal National Elevation Database (CoNED), an interpolated surface from Highest Astronomical Tide (HAT) data from National Oceanographic and Atmospheric Administration (NOAA) tide gauges, and NWI and C-CAP digital... Tags: Delaware, Delaware Bay, Geography, Hydrology, Land Use Change, All tags... New Jersey, United States, coastal ecosystems, elevation, environment, geospatial datasets, inlandWaters, salt marsh, vegetation, wetland ecosystems, wetland functions, Fewer tags Continuous Monitoring Data From Great Barnstable Marsh on Cape Cod, Massachusetts, 2017-19 Salt marshes are environmental ecosystems that contribute to coastal landscape resiliency to storms and rising sea level. Ninety percent of mid-Atlantic and New England salt marshes have been impacted by parallel grid ditching that began in the 1920s–40s to control mosquito populations and to provide employment opportunities during the Great Depression (James-Pirri and others, 2009; Kennish, 2001). Continued alteration of salt marsh hydrology has had unintended consequences for salt marsh sustainability and ecosystem services. Great Barnstable Marsh (Barnstable, Cape Cod, Massachusetts) has areas of salt marsh that were ditched as well as natural areas. The U.S. Geological Survey (USGS) measured parameters for groundwater... Tags: Barnstable County (606927), CTD measurement, Cape Cod (606914), Commonwealth of Massachusetts (606926), Environmental Health, All tags... Geochemistry, Great Marshes (615723), Sandy Neck (615779), United States of America (1890467), air temperature, atmospheric pressure, ecological restoration, environment, field experiments, field inventory and monitoring, groundwater level, inlandWaters, photosynthetically active radiation, salinity, salt marshes, soil temperature, water level measurements, water temperature, wetland ecosystems, wetland soils, wetlands, Fewer tags Continuous Monitoring Data From Natural and Restored Salt Marshes on Cape Cod, Massachusetts, 2016-17 Continuous monitoring data reported are a portion of data from a larger study investigating changes in soil properties, carbon accumulation, and greenhouse gas fluxes in four recently restored salt marsh sites and nearby natural salt marshes. For several decades, local towns, conservation groups, and government organizations have worked to identify, replace, repair, and enlarge culverts to restore tidal flow upstream from historical tidal restrictions in an effort to restore salt marsh ecosystems on Cape Cod, Massachusetts. Undersized or failed culverts restrict tidal exchange between the marsh and the bays and estuaries, which leads to alterations in plant community composition and in fundamental processes controlling... Tags: Barnstable County (606927), Bass Creek (615672), CTD measurement, Cape Cod (606914), Cape Cod Museum of Natural History (604249), All tags... Commonwealth of Massachusetts (606926), Ecology, Geochemistry, Massachusetts State Game Farm (604201), Quivett Creek (615976), Quivett Creek Marshes (603467), Scorton Creek Marshes (603460), Stony Brook (616002), Town of Brewster (618249), Town of Dennis (618252), Town of Sandwich (618259), Town of Yarmouth (618262), United States of America (1890467), air temperature, atmospheric pressure, ecological restoration, environment, field experiments, field inventory and monitoring, groundwater level, inlandWaters, photosynthetically active radiation, salinity, salt marshes, soil temperature, surface-water level, water level measurements, water temperature, wetland ecosystems, wetland soils, wetlands, Fewer tags Static chamber fluxes of carbon dioxide and methane from Phragmites wetlands and supporting data collected across a salinity gradient on Cape Cod, Massachusetts Saline tidal wetlands are important sites of carbon sequestration and produce negligible methane (CH4) emissions due to regular inundation with sulfate-rich seawater. Yet, widespread management of coastal hydrology has restricted vast areas of coastal wetlands to tidal exchange. These ecosystems often undergo impoundment and freshening, which in turn cause vegetation shifts like invasion by Phragmites, that affect ecosystem carbon balance. Understanding controls of carbon exchange in these understudied ecosystems is critical for informing climate consequences of blue carbon restoration and/or management interventions. Here we present measurements of net ecosystem exchange of carbon dioxide (CO2) and methane, along... Categories: Data; Tags: Barnstable County (606927), Cape Cod (606914), Cape Cod National Seashore (606900), Commonwealth of Massachusetts (606926), Herring River (616776), All tags... Sage Lot Pond (616548), United States of America, biota, carbon, climatologyMeteorologyAtmosphere, ecological processes, ecological restoration, ecology, environment, geoscientificInformation, invasive species, salt marshes, wetland ecosystems, wetland functions, wetlands, Fewer tags Continuous Water Level, Salinity, and Temperature Data from Monitoring Wells in Herring River Wetlands, Cape Cod, Massachusetts, 2020-2021 Environmental parameters affecting plant productivity and microbial respiration, such as water level, salinity, and groundwater temperature included in these datasets, are key components of wetland carbon cycling, carbon storage, and capacity to maintain elevation. Data were collected to (1) provide background data to evaluate potential differences in water level and carbon flux between wetland sites with differing elevation and tidal inundation and (2) facilitate applications of Blue Carbon projects in coastal wetlands. Associated child pages include continuous water level, salinity, and temperature from shallow wells installed in coastal wetland sites on Cape Cod, Massachusetts. These datasets are grouped by the... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Barnstable County (606927), CTD measurement, Cape Cod (606914), Cape Cod National Seashore (606900), Commonwealth of Massachusetts (606926), All tags... Herring River (616776), Town of Wellfleet (618261), United States of America (1890467), atmospheric pressure, ecological restoration, environment, field experiments, field inventory and monitoring, groundwater level, inlandWaters, salinity, salt marshes, water level measurements, water temperature, wetland ecosystems, wetland soils, wetlands, Fewer tags Continuous Water Level, Salinity, and Temperature Data from Creeks and Monitoring Wells in Natural and Restored Wetlands on Cape Cod, Massachusetts, 2019 Environmental parameters affecting plant productivity and microbial respiration, such as water level, salinity, and groundwater temperature included in these datasets, are key components of wetland carbon cycling, carbon storage, and capacity to maintain elevation. Data were collected to (1) provide background data to evaluate potential differences in water level and carbon flux between wetland sites with differing elevation and tidal inundation and (2) facilitate applications of Blue Carbon projects in coastal wetlands. Associated child pages include continuous water level, salinity, and temperature from shallow wells installed in coastal wetland sites on Cape Cod, Massachusetts. These datasets are grouped by the... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Barnstable County (606927), Bass Creek (617465), Boat Meadow River (616844), CTD measurement, Cape Cod (606914), All tags... Cape Cod Canal (619536), Commonwealth of Massachusetts (606926), Dock Creek (616591), Mill Creek (616621), Sagamore Beach (617797), Scusset Beach (616340), Town of Bourne (619412), Town of Eastham (619414), Town of Orleans (618257), Town of Sandwich (618259), USGS Science Data Catalog (SDC), atmospheric pressure, ecological restoration, environment, field experiments, field inventory and monitoring, groundwater level, inlandWaters, salinity, salt marshes, surface-water level, water level measurements, water temperature, wetland ecosystems, wetland soils, wetlands, Fewer tags Static chamber fluxes of carbon dioxide and methane from coastal wetlands on Upper Cape Cod, Massachusetts and supporting environmental data, 2021 Saline tidal wetlands are important sites of carbon sequestration and produce negligible methane (CH4) emissions due to regular inundation with sulfate-rich seawater. Yet, widespread management of coastal hydrology has restricted vast areas of coastal wetlands to tidal exchange. These ecosystems often undergo impoundment and freshening, which in turn cause vegetation shifts like invasion by Phragmites, that affect ecosystem carbon balance. Understanding controls of carbon exchange in these understudied ecosystems is critical for informing climate consequences of blue carbon restoration and/or management interventions. Here we present measurements of net ecosystem exchange of carbon dioxide (CO2) and methane, along... Categories: Data, Data Release - Under Revision; Tags: Barnstable County (606927), Cape Cod (606914), Commonwealth of Massachusetts (606926), Flat Pond (615605), Sage Lot Pond (616548), All tags... United States of America, Waquoit Village (617261), West Falmouth (616149), Woods Hole (617060), biota, carbon, climatologyMeteorologyAtmosphere, ecological processes, ecological restoration, ecology, environment, geoscientificInformation, invasive species, salt marshes, wetland ecosystems, wetland functions, wetlands, Fewer tags Geochemical data supporting analysis of geochemical conditions and nitrogen transport in nearshore groundwater and the subterranean estuary at a Cape Cod embayment, East Falmouth, Massachusetts, 2013 This data release provides analytical and other data in support of an analysis of nitrogen transport and transformation in groundwater and in a subterranean estuary in the Eel River and onshore locations on the Seacoast Shores peninsula, Falmouth, Massachusetts. The analysis is described in U.S. Geological Survey Scientific Investigations Report 2018-5095 by Colman and others (2018). This data release is structured as a set of comma-separated values (CSV) files, each of which contains data columns for laboratory (if applicable), USGS Site Name, date sampled, time sampled, and columns of specific analytical and(or) other data. The .csv data files have the same number of rows and each row in each .csv file corresponds... Categories: Data; Types: Citation; Tags: Cape Cod, Massachusetts, Eel River, Massachusetts, Hydrogeology, Sea Coast Shores, East Falmouth, Massachusetts, USGS Science Data Catalog (SDC), All tags... Water Resources, biogeochemical cycling, geochemical processes, groundwater flow, groundwater level, groundwater quality, nutrient cycling, Fewer tags Collection, analysis, and age-dating of sediment cores from mangrove and salt marsh ecosystems in Tampa Bay, Florida, 2015 Coastal wetlands in Tampa Bay, Florida, are important ecosystems that deliver a variety of ecosystem services. Key to ecosystem functioning is wetland response to sea-level rise through accumulation of mineral and organic sediment. The organic sediment within coastal wetlands is composed of carbon sequestered over the time scale of the wetland’s existence. This study was conducted to provide information on soil accretion and carbon storage rates across a variety of coastal ecosystems that was utilized in the Tampa Bay Blue Carbon Assessment (ESA, 2017; linkage below). Ten sediment cores were collected from six Tampa Bay wetland sites in October 2015 (maximum core length 40 centimeters). Three main vegetation types... Categories: Data; Tags: 137-cesium, 210-lead, City of Saint Petersburg (2405401), City of Tampa (2405568), Double Branch Bay (281701), All tags... Fort de Soto Park (282682), Geochemistry, Hillsborough County (295757), Hunter Pass (284405), Manatee County (295744), Old Tampa Bay (294109), Pelican Cove (288669), Pinellas County (295745), Rocky Creek (289882), Ruskin (290065), State of Florida (294478), Tampa Bay (294169), Terra Ceia Bay (292128), United States of America, Weedon Island (292981), accretion rate, age model, carbon, carbon burial, carbon isotope analysis, ecological restoration, elevation, environment, geoscientificInformation, inlandWaters, location, mangrove sediments, mangroves, nitrogen, oceans, radiometric dating, salt marshes, sea-level change, sedimentation, soil chemistry, wetland ecosystems, wetland soils, wetlands, Fewer tags Collection, Analysis, and Age-Dating of Sediment Cores from Salt Marshes, Rhode Island, 2016 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 1 2 »