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Celebrating 100 Years of Science! | 1925-2025

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Adult Scarlet Honeycreeper standing
Drepanis coccinea (Scarlet Honeycreeper)
Mangroves and oyster reefs at Pumpkin Bay in the Ten Thousand Islands, Florida.
Mangroves and oyster reefs
Conceptual diagram illustrating cesspool seepage into a residential canal prior to improved wastewater treatment.
Cesspool seepage prior to improved wastewater…
Illustration of Japanese stiltgrass
Microstegium vimineum 2 (Japanese Stiltgrass)
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
Dredging the Champlain Canal, upper Hudson River, NY, to remove PCBs from the riverbed sediment is the one of the largest environmental dredging projects ever undertaken in the U.S.
Bulldozer with bucket unloads dredge spoils into…
Conceptual diagram illustrating how the filtration capacity of a natural system is much larger.
Natural versus impervious water filtration
Science in action. Tim Carruthers samples sea grass
Sea Grass Sampling
Tim Carruthers samples sea grass
Sea Grass Sampling
Caroline Wicks and Tim Carruthers sample seagrass in the cold waters of the Sinnepatuxent Bay
Seagrass Sampling
This photo was taken on Manasota Key in Southwest Florida. It is a Calico Box Crab or Leopard Crab. Hepatius epheliticus
Leopard Crab
Sorting seagrass biomass for analysis of biomass, shoot length, nutrient content
Sorting SAV biomass
Illustration of Microstegium vimineum (Japanese Stilt Grass)
Microstegium vimineum (Japanese Stilt Grass) 1
Illustration of a small corner store
Retail: corner store
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