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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
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
Assembled gear to deploy oyster biological indicators. Cages will hold the oysters and will be suspended 0.5 meters above the bottom by the buoys and anchored by the bricks.
Cages for deploying oyster biological indicators
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
Oysters are placed in cages which are suspended by buoys and anchored with bricks.
Cages for oyster biological indicators
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
Deploying oyster biological indicators of nitrogen source overboard in Monie Bay, National Estuarine Research Reserve System
Deploying oyster bioindicators
This buoy is marking a deployment of oyster biological indicators in Monie Creek, part of the Chesapeake Bay, National Estuarine Research Reserve
Buoy marking oyster biological indicators
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
Deploying oyster (Crassostrea virginica) biological indicators of nitrogen source in Monie Bay National Estuarine Research Reserve System
Deploying oyster biological indicators
Collecting oyster biological indicators after deployment in Maryland's Coastal Bays.
Collecting oyster biological indicators
A few housing developments can be seen in upstream areas of Monie Creek.
Development along Monie Creek
buoys marking oyster biological indicators of nitrogen source in Little Monie Creek, Monie Bay, National Estuarine Research Reserve System.
buoys in Little Monie Creek
Oyster biological indicator cages have been collected after deployment.
Fieldwork in Maryland's Coastal Bays
Buoy marking oyster biological indicator in Little Monie Creek, Chesapeake Bay National Estuarine Research Reserve
Little Monie Creek
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
Monitoring water quality with a YSI 85 instrument in Monie Creek, part of the Chesapeake Bay National Estuarine Research Reserve. Buoys marking oyster biological indicators can be seen in the background.
Monitoring water quality
deploying oyster biological indicators of nitrogen source in Monie Bay, National Estuarine Research Reserve.
Deploying Oysters in Monie Bay
Bricks anchor the cages for deploying oyster biological indicators
Assembling biological indicator gear
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

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