Research Physical Scientist
Email:
meagle@usgs.gov
Office Phone:
508-457-2280
Fax:
508-457-2310
ORCID:
0000-0001-5072-2755
Location
384 Woods Hole Road
Woods Hole
, MA
02543-1598
US
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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
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Lake-bottom sediment and associated quality-control samples were collected in August 2020 from one coring location (U.S. Geological Survey station 413756070321301, ASHUMET POND, MASHPEE MI-ASHPD-0011) in Ashumet Pond downgradient from a former fire-training area on Cape Cod, Massachusetts. The core was collected to determine if per- and polyfluoroalkyl substances (PFAS) were present in the bottom sediments of a lake known to have elevated concentrations of PFAS in surface water and groundwater (Tokranov and others, 2021), and whether the sediments could act as a continuous source of PFAS to the lake. Processing the sediment core entailed collection of discrete samples at intervals ranging from 1-5 centimeters (cm)...
Categories: Data,
Data Release - Revised;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: Cape Cod,
Eastern United States,
Environmental Health,
Falmouth,
Hydrology, All tags...
Mashpee,
Massachusetts,
PFAS,
Sandwich,
Sedimentology,
USGS Science Data Catalog (SDC),
Water Quality,
chemical analysis,
environment,
grain-size analysis,
hydrogeology,
limnology,
radiometric dating,
sedimentation,
vibracoring, Fewer tags
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Assessment of geochemical cycling within tidal wetlands and measurement of fluxes of dissolved and particulate constituents between wetlands and coastal water bodies are critical to evaluating ecosystem function, service, and status. The U.S. Geological Survey and collaborators collected surface water and porewater geochemical data from a tidal wetland located on the eastern shore of Sage Lot Pond in Mashpee, Massachusetts, within the Waquoit Bay National Estuarine Research Reserve, between 2012 and 2019. Additional porewater geochemical and field data from a tidal wetland on the eastern shore of Great Pond in East Falmouth, MA are also included. These data can be used to evaluate biogeochemical conditions and cycling...
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The San Juan Bay Estuary, Puerto Rico, contains mangrove forests that store significant amounts of organic carbon in soils and biomass. There is a strong urbanization gradient across the estuary, from the highly urbanized and clogged Caño Martin Peña in the western part of the estuary, a series of lagoons in the center of the estuary, and a tropical forest reserve (Piñones) in the easternmost part with limited urbanization. We collected sediment cores to determine carbon burial rates and vertical sediment accretion from five sites in the San Juan Bay Estuary. Cores were radiometrically-dated using lead-210 and the Plum age model. Sites had soil C burial rates ranging from 50 grams per meter squared per year (g m-2...
Categories: Data;
Types: Map Service,
OGC WFS Layer,
OGC WMS Layer,
OGC WMS Service;
Tags: 137-cesium,
210-lead,
Caño de Martín Peña (1613013),
Commonwealth of Puerto Rico (1779808),
Geochemistry, All tags...
Laguna La Torrecilla (1611340),
Laguna San José (1611343),
Laguna de Pinoñes (1611336),
Plum age model,
San Juan (1612697),
United States of America (1890467),
accretion rate,
age model,
carbon,
carbon burial,
carbon isotope analysis,
ecological restoration,
environment,
geoscientificInformation,
health,
mangrove sediments,
nitrogen,
oceans,
radiometric dating,
sea-level change,
sedimentation,
soil chemistry,
utilitiesCommunication,
wetland ecosystems,
wetland soils,
wetlands, Fewer tags
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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
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