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Laboratory drying oven. Oyster tissue samples are on the bottom shelf and dried at 60 degrees Celcius overnight or until thoroughly dry. Dessicant is on the middle shelf to remove any moisture.
Drying oven
Samples are ground with mortar and pestle
Grinding with mortar and pestle
Oysters deployed as biological indicators of nitrogen source were dried and then ground for stable nitrogen isotope analysis. Muscle tissue is on the left, gills are in the middle, and mantle tissues are on the right.
Ground oyster tissue
For stable isotope analysis, small subsamples of homogenously ground oyster tissues in the scintillation vial are placed in the tin capsule, held by the forceps.
Ground oyster tissue and tin capsule
Preparing a sediment core for sampling
Sediment core preparation
Water samples from the Patuxent River are prepared for analysis on board the R/V Aquarius
Water sample preparation
Oyster biological indicators are deployed in mesh cages that will be suspended 0.5 meters above the bottom by the white buoys and anchored by the bricks.
Cages for deploying oyster biological indicators
Excess fine grained oxic and anoxic sediments from a sample core taken from the Patuxent River
Fine sediments from Patuxent River
A sediment core has been collected and is being prepared for storage and analysis by carefully filling the core with water from the sample site to minimize disturbance.
Sediment core preparation
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
A sediment slurry was mixed and the flask capped to trap gases formed as intermediary steps of denitrification.
Sediment slurry
Sorting seagrass biomass for analysis of biomass, shoot length, nutrient content
Sorting SAV biomass
Cubitainers filled with water samples for nutrient and plankton analysis
Cubitainers filled with water samples
Graduate student Ben Fertig holds a cage that will be used for deploying oyster biological indicators. This gear is also equipped to hold a perforated cup for deploying macroalgal biological indicators at half Secchi depth.
Deployment cage for oyster biological indicator
Collecting and preparing samples in the field in Johnson Bay, part of Maryland's Coastal Bays. Filtering for chlorophyll, dissolved nutrients, collecting samples for total nutrients, and bacteria/viruses.
Sampling in Johnson Bay
Samples were collected for Total Suspended Solids by filtering water samples onto GF/F Whatman filter paper.
Total Suspended Solids
Samples were collected for Total Suspended Solids by filtering water samples onto GF/F Whatman filter paper.
Total Suspended Solids

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