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Celebrating 100 Years of Science! | 1925-2025

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Conceptual digram illustrating a rain barrel design to stop sediment and nutrients from running off property into storm drains.
Rain barrel
Illustration of nutrient, toxin, and sediment inputs.
Inputs: nutrients, toxins, sediment
Conceptual diagram illustrating the biomagnification of mercury within the aquatic food chain.
Biomagnification of mercury within aquatic food…
Conceptual diagram illustrating changes in seagrasses in Johnson Key Basin, Western Florida Bay, and the relative coverage of seagrass species.
Changes in seagrass in Johnson Key Basin
Conceptual diagram illustrating how phytoplankton blooms in eastern Florida Bay and southern Biscayne Bay were sustained through feedback loops among ecosystem components.
Phytoplankton bloom feedback loops
Conceptual diagram illustrating the inverse relationship between the size of plants and their growth rates and nutrient requirements.
Relationship between plant size, nutrient…
Conceptual diagram illustrating differences in nutrient transport between benthic algae and seagrasses.
Seagrass nutrient transport
Conceptual diagram illustrating the nitrogen cycle.
The nitrogen cycle
Conceptual diagram illustrating the phosphorus cycle.
The phosphorus cycle
After tropical Storm Irene, trash, mud, and logs washed into the bay.
Affects of tropical storm Irene
Triptych comparison of a river mouth, showing a pristine environment (left) with subsequent sediment, nutrients, and toxin inputs leading to an unhealthy and unproductive environment with a hardened shoreline (right).
Estuary 3D: River Mouth Triptych
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
Sediment slurries in 125 mL Erlenmeyer flasks capped with rubber stoppers to prevent gas exchange for indirect measurements of denitrification using acetylene inhibition techniques
Sediment slurries
Sediments from the Patuxent River are sifted through onboard the R/V Aquarius to collect and identify benthic organisms
Sifting for benthic organisms
The grab sampler will collect sediment samples once the spring releases the jaws at the bottom of the Patuxent River.
Sediment grab sampler
low tide along one of the three tributary creeks to Monie Bay, National Estuarine Research Reserve
Low tide along a salt marsh
low tide along one of the three tributary creeks to Monie Bay
low tide along a salt marsh
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
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
A sediment slurry was mixed and the flask capped to trap gases formed as intermediary steps of denitrification.
Sediment slurry
Photo demonstrating sedimentation, found in the War at the Pacific National Historical Park in Guam.
Sediment runoff
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…
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