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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

Water quality monitoring fieldwork in Maryland's Coastal Bays — Fieldwork in Maryland's Coastal Bays

Plankton net tows behind a ship, collecting samples in the jar at the end of the net. — Plankton net

buoys marking oyster biological indicators at a tributary of Monie Bay, National Estuarine Research Reserve at low tide along the salt marsh — buoys at low tide

Deploying oyster biological indicators of nitrogen source overboard in Monie Bay, National Estuarine Research Reserve System — Deploying oyster bioindicators

Measuring Secchi depth in winter presents a challenge. — Winter Secchi depth = 0

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

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 YSI meter is used to measure temperature, salinity, dissolved oxygen, and conductivity in Monie Bay, a component of Chesapeake Bay National Estuarine Research Reserve — Measuring water quality

Measuring Secchi depth in frozen water presents a challenge. — Winter Secchi depth

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 sediment slurry was mixed and the flask capped to trap gases formed as intermediary steps of denitrification. — Sediment slurry

The 2008 Severn River Report Card Release. The report card summarizes 2008 water quality results, which are based on data collected by the Severn Riverkeeper Program. This report card helps to clarify the Severn's health, and provides instructions on what individuals can do to improve its condition. The release of this report card was attended by local, state, and federal representatives, Severn River Keepers, and IAN staff. — John Sarbanes at the Severn River Report Card…

The 2008 Severn River Report Card Release. The report card summarizes 2008 water quality results, which are based on data collected by the Severn Riverkeeper Program. This report card helps to clarify the Severn's health, and provides instructions on what individuals can do to improve its condition. The release of this report card was attended by local, state, and federal representatives, Severn River Keepers, and IAN staff. — Severn River Report Card Release

buoys marking oyster biological indicators of nitrogen source in Little Monie Creek, Monie Bay, National Estuarine Research Reserve System. — buoys in Little Monie Creek

Bags holding oysters hang off the Horn Point Laboratory dock under a layer of ice in the Choptank River — Oyster bags under a frozen river

Filtration; pigment analyses

Filtration; total suspended solids analyses

Water quality monitoring fieldwork in Maryland's Coastal Bays — Fieldwork in Maryland's Coastal Bays

Oyster biological indicator cages have been collected after deployment. — Fieldwork in Maryland's Coastal Bays

Water quality monitoring fieldwork in Maryland's Coastal Bays. — Fieldwork in Maryland's Coastal Bays

David celebrates being muddy in the field at Johnson Bay — Fieldwork is fun!

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