You can help advance science from your own backyard. All you have to do is spend about 30 minutes once a year, standing on your dock and answering a brief questionnaire about what you see when you look out at the marsh. Your observations, at the same time, in the same place, once a year for 30 minutes is all it takes to help us understand the health of our estuaries.

What does a Salt Marsh Sentinel do?

As a Salt Marsh Sentinel, you will collect data and record it on an NSRWA datasheet once a year between August and September at low tide. Your quick observations from your dock, over multiple years, will be invaluable to our efforts to protect the local watershed.

When you volunteer, NSRWA will place a few small markers (colored pushpins) on your dock floor to mark specific distances from the bank of the river. Dr. Sara Grady, NSRWA’s watershed ecologist, will show you what to monitor, what information to gather, and how to record it. We will pool the data collected for analysis. Your dock will be used only as a viewing platform along the river; it will not be associated in any way with the data we collect.

As a Salt Marsh Sentinel, you will receive:
• A banner for your dock to showcase your participation in this exciting new study
• An annual report with an update on this exciting new initiative

Why study the salt marsh?

Salt marshes are in peril. We are starting to see concerning change and loss in the marches along the North and South Rivers estuaries. The major threats are sea level rise and physical obstacles to marsh migration, over-flooding, pollution and nutrients from fertilizers, boat traffic, and invasive species such as the green crab. These threats are causing our local salt marshes to lose their structure and fall apart.

Salt marshes serve important ecological functions. They protect our waters by absorbing nutrients from the land; offer nursery habitat and shelter for a variety of fish like striped bass, bluefish, and herring; and they provide food for birds, fish, and other creatures. Marshes also help sequester carbon—“blue carbon,” which is another way of saying that marine plants help mitigate climate change.

Why should I be a Salt Marsh Sentinel?

The health of our local estuaries, now and for years to come, relies on your help in this project.  As someone who lives near a salt marsh, you appreciate how beautiful and important they are. As part of a New England-wide effort, the NSRWA collects scientific data on local salt marshes to inform management decisions and broad policy efforts. With your help, we will be able to assess changes in the marsh over time. This information is essential in our efforts to protect the estuary and the hundreds of creatures that make it their home.

Please email Sara Grady, Ph.D., at or call the NSRWA at 781-659-8168 to participate in this exciting new initiative.