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After being deployed as a biological indicator of nitrogen source, the gills of this oyster were dissected and dried and will be ground for isotope analysis.
Dried oyster gills
Collecting oyster biological indicators after deployment in Maryland's Coastal Bays.
Collecting oyster biological indicators
A sediment slurry was mixed and the flask capped to trap gases formed as intermediary steps of denitrification.
Sediment slurry
Water quality monitoring fieldwork in Maryland's Coastal Bays
Fieldwork in Maryland's Coastal Bays
Oyster biological indicator cages have been collected after deployment.
Fieldwork in Maryland's Coastal Bays
Preparing sediment corers made from 60 ml syringes for sampling and water quality monitoring fieldwork in Maryland's Coastal Bays.
Preparing sediment cores in Maryland's Coastal…
Sediment slurries in triplicate were mixed and flasks were capped to trap gases released during denitrification
Sediment slurries
Cages used for deploying oyster biological indicators in Monie Bay component of Chesapeake Bay National Estuarine Research Reserve are collected in the small boat.
Collecting oyster biological indicator buoys
Some cages became very fouled with algae and bryozoans during deployment while others did not. These two cages were deployed at the same location during the same time period.
Fouling of cages for oyster biological indicators
Cages for oyster biological indicators are messy with sediment and fouling after deployment
Messy cages
Conceptual diagram illustrating how sampling is to be conducted based on available resources, data needed, and analyses conducted.
Choosing sampling methods
Conceptual diagram illustrating how an estuary can be divided in ecological reporting.
Division of regions in ecological report cards
Conceptual diagram illustrating two different methods of measuring a coastal bay. Sixty fixed monitoring stations indicate threshold concentration of nitrogen in the coastal bays.
Spatially fixed sampling
An autoanalyzer setup to measure isotope ratios in dissolved gases in water samples.
Autoanalyzer
Isotope ratio mass spectrometer equipment to analyze dissolved gases in water samples
Isotope ratio mass spectrometer
An old mass spectrometer for analyzing stable isotopes
Isotope ratio mass spectrometer
Isotope ratio mass spectrometer. The tubing allows different gases to flow in and out of the mass spectrometer to meausure gas chemistry and isotope ratios
Isotope ratio mass spectrometer
Isotope ratio mass spectrometer with water bath to set samples at a constant temperature
Isotope ratio mass spectrometer with water bath
Water samples collected for analysis. These samples have been capped and crimped to seal against gas exchange so that dissolved gases can be analyzed.
Water samples
Snorkeling to gather samples for research aboard the Parker
Collecting samples with the Parker
Illustration of box corer
Box corer
Illustration of the UMCES research vessel, RV Rachel Carson
Research vessel 2
Illustration of sediment trap
Sediment trap
Filtering water samples for chlorophyll a, total suspended solids, total volatile solids, and suspended particulate matter. Filtered water can be used to measure dissolved nutrients such as nitrogen and phosphorus.
Filtering water samples
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