Research Ecologist
Columbia Environmental Research Center
Email:
waltersd@usgs.gov
Office Phone:
573-876-1815
Fax:
573-876-1863
ORCID:
0000-0002-4237-2158
Location
CERC - Tech Center
4200 New Haven Road
Columbia
, MO
65201
US
Supervisor:
Amy M Beussink
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Here we provide data used to report on changes in tidal marsh elevation in relation to our network of 20 fixed benchmarks located across a geographically broad network of coastal elevation monitoring stations with standard monitoring protocols. This dataset includes Surface Elevation Table (SET) measurements taken from 10 sites along the US Atlantic coast, ranging from Virginia to Maine. Each site includes 2 SETs where repeat measurements of wetland surface elevation were made from 2005-2019.
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We measured turbidity along transects from channel to marsh interior for 4 sites along the east coast of the United States at: Mockhorn Island, on the Eastern Shore of VA, USA; Plum Island in MA, USA; Goodwin Islands on the York River, VA USA; and the Altamaha River estuary, in GA, USA.
Tags: Ecology,
Geomorphology,
Geomorphology,
Sedimentology,
Sedimentology, All tags...
USGS Science Data Catalog (SDC),
United States,
environment,
suspended material (water),
turbidity,
wetland ecosystems, Fewer tags
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Survival and size of mayflies at each life stage, as well as MeHg concentrations in diatoms and mayflies exposed to low and high MeHg concentrations and a range of selenomethione (SeMet) concentrations.
Tags: Aquatic Biology,
Columbia Environmental Research Center,
Environmental Health,
Mayfly,
Methylmercury, All tags...
USGS Science Data Catalog (SDC),
bioaccumulation,
biota,
diatoms,
ecotoxicology,
mercury contamination,
selenium, Fewer tags
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The data contain yearly modeled estimates of Pacific salmon escapement (in annual metric tons of wet mass) from 1976 to 2015 across four regions of western North America. A second data file contains modeled estimates of contaminant or nutrient concentrations in Pacific Salmon. The modeled estimates were derived from Bayesian generalized linear models (contaminant or nutrient concentrations) or from Bayesian generalized additive models (Salmon Escapement).
Categories: Data;
Tags: Aquatic Biology,
Bering Sea Wilderness,
British Columbia,
North America,
Southeast Alaska, All tags...
USGS Science Data Catalog (SDC),
biota,
contamination and pollution,
escapement,
nutrient cycling,
salmon,
subsidies, Fewer tags
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Polychlorinated biphenyl (PCB) concentrations were measured in the lower Ottawa River in 2009 before dredging and after dredging in 2011, 2012, 2013, and 2015. Media collected for analysis included sediment, water, macroinvertebrates, and tetragnathid spiders at 18 stations. At each station 16 surface sediment core samples (top 15 cm) were collected and composited together with a mechanical mixer to achieve a homogeneous composite sample. Mid-depth water column samples were collected using a Van Dorn, Niskin or similar type sampler. Artificial substrate samplers (Hester Dendys) were used to collect aquatic macroinvertebrates. Riparian spiders (family Tetragnathidae) were collected from their webs by gloved hand...
Categories: Data;
Tags: Environmental Health,
Ottawa River,
PCB Compounds,
USGS Science Data Catalog (SDC),
arachnids, All tags...
biota,
dredging,
environment,
industrial pollution,
remediation, Fewer tags
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