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A scientist who works in the field.
Field researcher
Many parts of Pipe Creek are so shallow that you can see directly through the water to the bottom. This makes sampling difficult, since disturbing the sediment is almost inevitable. Sandusky, Ohio.
Shallow Creeks
Conceptual diagram illustrating the process used by scientists to explore the similarities and differences in modern fauna and core fauna of a specific region.
Modern vs. core fauna
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
Collecting plankton along the Patuxent River
Plankton collection
Preparing a sediment core for sampling
Sediment core preparation
This sediment grab remains open when sent to the bottom and the release snaps shut the mouth for sediment collection.
Sediment grab
Sediments from the Patuxent River are sifted through onboard the R/V Aquarius to collect and identify benthic organisms
Sifting for benthic organisms
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
The grab sampler will collect sediment samples once the spring releases the jaws at the bottom of the Patuxent River.
Sediment grab sampler
Collecting water samples in Maryland's Coastal Bays
Collecting water samples
Oysters in bags hang off the side of the Horn Point Laboratory dock on the Choptank River on the Chesapeake Bay
Sitting off the dock on the Bay
These oyster biological indicators were collected after deployment in a tributary of Monie Bay. One set had a greenish tinge, while the other did not, even though both sets were deployed at the same site.
Collected oysters
The eastern oyster (Crassostrea virginica) builds reefs as oyster larvae set onto other oyster shells, as seen in this small clump of at least four oysters.
The eastern oyster (Crassostrea virginica)
Excess fine grained oxic and anoxic sediments from a sample core taken from the Patuxent River
Fine sediments from Patuxent River
The oysters in this cage are being deployed as biological indicators of nitrogen source. They will be suspended 0.5 meters above the bottom by the white buoy.
Oyster biological indicators
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
Water samples from the Patuxent River are collected and prepared for analysis on board the R/V Aquarius
Water sample analysis
Plankton net tows behind a ship, collecting samples in the jar at the end of the net.
Plankton net
Tim Carruthers prepares a sediment corer with a rubber stopper. This corer is made by cutting off the top of a 60 mL syringe. Samples were collected from Maryland's Coastal Bays
Collecting sediment cores
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