Why does CLF heart estuaries? For so many reasons. Estuaries are one of nature’s great ideas. Not just an elegant transition from freshwater to saltwater, estuaries also provide rich feeding grounds for coastal birds and are important places for fish and other marine life to reproduce. Their sheltered waters and unique vegetation provide juvenile animals with places to hide and find food. This is why estuaries are often called the “nurseries of the sea.”

Some of New England’s best known estuaries include Casco Bay, the many small bays and inlets of Massachusetts’ shore, the Great Bay in New Hampshire and, of course, Narragansett Bay in Rhode Island. Estuaries are great places for recreation and tourism. Boating, bird-watching, and fishing are some of our favorite estuary pastimes. Not only are estuaries beneficial to us for relaxing and enjoying nature, they are extremely valuable and provide other services as well. They are natural filters – storing and trapping pollutants and sediments that come off the land, preventing them from reaching the blue water. They also provide protection from coastal flooding. With all these wonderful reasons, what’s not to love about estuaries!

CLF works to protect and restore these amazing and valuable places with a network of like-minded conservation groups across the nation. Restore America’s Estuaries is a national alliance of coastal conservation organizations committed to protecting and restoring the lands and waters essential to the richness and diversity of coastal life. The challenge we all face is to make sure our estuaries and other waterways receive the care and proper management they deserve. Restoring degraded streams and rivers is a great way to provide healthy estuaries and the benefits we love and depend upon. If you love estuaries too (and we know you do), then take a minute to share the love online through the I Heart Estuaries Facebook page. Let the Congress and the Administration know of your heartfelt desire to see New England’s estuaries receive better protection and stewardship.

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  Monkfish with apple butter and shaved vegetables prepared by Chef Matt Jennings of Farmstead & La Laiterie - get his recipe on TalkingFish.org! (Photo credit: Matt Jennings)

  “Ask an Expert: Chef Matt Jennings never compromises on serving fresh and local seafood” - TalkingFish.org interviews Matt Jennings, Executive Chef, Co-owner and Master Cheesemonger of Farmstead & La Laiterie, who buys locally-caught whole fish from dependable sources he knows personally and trusts wholeheartedly – and he has a great recipe for monkfish as well!

• “Talking Eeelgrass” – When we talk about fish, it’s good to remember that they not only come from somewhere but that that somewhere makes the fish. Habitat is essential; without it even many migratory fish won’t have a place to call home. Many North Atlantic fish spend an important part of their life cycles in coastal eelgrass habitat, and eelgrass is declining.
• “Fish Talk in the News – Friday, February 3″ – A weekly roundup of stories we think will interest readers. This week: a new system to estimate recreational catch, Massachusetts’s new Commercial Fisheries Revolving Loan Fund and its efforts to brand Massachusetts seafood, raising tilapia in garbage bins in the Bronx, the latest in CLF’s work to protect estuaries and fish habitat, and updates on Gulf of Maine cod.

Robin Just is a volunteer for CLF with an educational and professional background in biology and water quality issues. This blog was originally published on TalkingFish.org.

When we talk about fish, it’s good to remember that they not only come from somewhere but that the somewhere makes the fish. Habitat is essential; without it even many migratory fish won’t have a place to call home.

An eelgrass bed beneath the waters of New Hampshire's Great Bay (Photo credit: Ben Kimball, courtesy of NH Division of Forests and Lands).

Many North Atlantic fish spend an important part of their life cycles in coastal eelgrass habitat, and eelgrass is declining. Eelgrass is a native submerged aquatic plant found in shallow waters from Nova Scotia to North Carolina’s Outer Banks. In the northern areas this hearty plant spends part of each year under sea ice. It is not a true grass, but a flowering plant that evolved from terrestrial flora. With thin, streamlined leaves, and an extensive root system, it is uniquely adapted to thrive in ocean tides and swell. What it isn’t adapted to deal with is nutrient pollution, dredging, and other anthropogenic stressors that have our productive eelgrass meadow areas on the decline.

Why does this matter to fish? Eelgrass is one of the most valuable habitats in the northeast. For example, in the early 1930s a “wasting disease” decimated 90% of the Atlantic eelgrass communities. This decline took a heavy toll on, among other things, bay scallops. Bay scallops are a commercially important shellfish that range from Cape Cod to Florida, and are very dependent on seagrass meadows. Not only do they attach to living eelgrass leaves after their larval stage, but they consume decaying leaves for a significant portion of their diet. Bay scallops declined dramatically throughout their range, coincident with the wasting disease, and populations didn’t begin to recover until the mid-1940s. Some populations, such as those in the Chesapeake Bay, have never come back.  Lobsters, clams, and other invertebrates also declined.

Loss of eelgrass habitat has an effect on other commercial fishery species as well. Some of these animals, such as cod, winter flounder, and lobster use eelgrass meadows as a refuge in their early life stages. The eelgrass provides places to stay hidden, feeding opportunities, and shelter from wave energy. Some species, such as striped bass, bluefish, tautog, and fluke will use eelgrass habitat as adults, as a place to hunt and forage.

A tautog in an eelgrass bed (Photo credit: MA Divison of Marine Fisheries).

In addition to providing a place to eat and live, eelgrass is part of the foundation of our marine food web. Eelgrass is a primary producer – turning aquatic carbon dioxide into food and energy through photosynthesis; it is then eaten by many animals that are then consumed by our commercially important species. In short: eelgrass matters a lot to New England fishery resources, and its decline is not good news.

The impact of the loss of eelgrass on these fisheries is hard to tease out from the many drivers of the decline in fish populations, including fishing pressure, habitat destruction, nutrient pollution, climate change, and other stressors. There has been almost no research done to numerically link the decline in eelgrass with population-level changes in commercial fisheries species. However, an 11-year study in Buzzards and Waquoit Bays found that loss of eelgrass was accompanied by significant declines in fish biomass, species richness, and other measures of community integrity. Worryingly, a recent investigation of New Hampshire eelgrass populations found they are declining by about 9% a year, and eelgrass mapping efforts in Massachusetts show significant declines as well. This is an issue the Conservation Law Foundation’s new Great Bay-Piscatqua Waterkeeper will be addressing.

While the link has yet to be fully characterized between commercial fish populations and healthy eelgrass, it is vital that recovering species have functioning near-shore ecosystems to support their reproduction and growth.

Why is eelgrass declining? The decline is worldwide. Our local populations are suffering from a combination of coastal development and nutrient pollution, dredging activities, over-grazing by Canada geese, and climate change. Here’s a brief description of each of those stressors:

• Eelgrass is extremely sensitive to light levels. Urban build-up and construction activities in our coastal areas put sediment in the water, which decreases water clarity, and that takes a toll on eelgrass populations . Nutrient pollution from wastewater, stormwater, and other human activities can promote blooms of algae that block light to these photosensitive plants and prevent them from growing.
•  Dredging activities uproot eelgrass and can completely decimate an eelgrass meadow. It can take ten years or more for eelgrass to recover from this kind of stress.
• Grazing pressure from Canada geese is on the rise as the warmer winters encourage more of them to stay local instead of heading south. More geese means competition for food, and the geese increasingly turn to eelgrass to get them through the winters.
• Climate change: as ocean temperatures rise, native plants feel the heat. There is evidence that northern populations of eelgrass will not be able to adapt to warmer waters as easily as the southern populations might.

Efforts to restore eelgrass are underway around New England, but it’s not a simple process. Areas that once supported thriving eelgrass meadows can be re-planted, but unless the factors involved in eelgrass decline are addressed, the efforts will probably fail. For example, if construction activities degrade nearby water quality, leading to eelgrass loss, and then the water quality recovers, restoration is possible. But if the water is still dirty, it’s not going to help, and the habitat is lost.

Waiting until we know exactly how eelgrass ecosystems and commercial fish populations are linked before we address eelgrass decline is a dangerous path to follow. Since we know for sure that many of our economically important species utilize this habitat, it makes sense to try and protect it. We need good science about the utilization of eelgrass habitat, and we need effective restoration efforts that address water quality and other physical stressors. This will give our recovering fish populations every opportunity to grow and thrive.

The New England coastline has many faces, from the rocky slabs on Schoodic Point in Maine to the cascading sand dunes at the Cape Cod National Seashore. One of the coastal resources with which virtually all New Englanders are familiar, however, is salt marshes. Every coastal New England state is blessed with these resource areas. Some are high marshes that are flooded by salt water only infrequently at maximum high tides; others are low marshes that are flooded on every tidal cycle. These marshes are comprised of a variety of rugged marsh grasses and plants that are adapted to this complex environment, as well as mud flats that form below the lowest grasses and can only be seen at the lowest tides.

We say New England is “blessed” with these resources because marshes have been critical to human activities from the earliest days of human presence in New England. In pre-colonial days, Native Americans hunted on the marshes for birds, clams and fish, and the early European settlers harvested salt marsh grasses for hay and took advantage of tidal cycles to set up fishing traps that caught the then-abundant variety of coastal marine fish. Later settlers discovered that these marsh areas could be diked to create valuable upland farmland, a good thing for the struggling farmers but a significant ecological loss to New England.

A salt marsh in Sandwich, MA. Salt marshes perform a number of critical functions for our environment. (CLF photo)

These salt marshes, you see, perform a number of critical functions in our environment. They are essential habitat for a diverse number of resident and migratory birds and juvenile marine fish; they protect the uplands from ocean storms, reducing storm surges and mitigating the power of ocean waves; and they filter the water running off the land and remove sediments and pollution before that run-off reaches the sea. They are also a fundamental part of our New England landscape, as any review of New England art will reveal.

To make way for agriculture, housing, marine commerce, and major urban centers like Boston, Portsmouth, and Portland, thousands of acres of coastal wetlands were filled. Fairly reliable estimates are that the Gulf of Maine, for example, has lost roughly half of its original inventory of rich salt marshes. With sea level rise a certainty in the coming decades, increasing numbers of people will begin to understand the protective role that these marshes once played.

It is not too late to restore some of this lost natural heritage. CLF and other conservation groups around the country formed Restore America’s Estuaries (RAE) in 1996. RAE’s mission is to restore one million acres of wetlands, and we are well on our way. Each year, CLF places more than $100,000 with municipalities and citizen groups to pay for the costs of wetland restoration.  These projects remove dams and dikes and eliminate tidal restrictions, such as highway culverts, that choke many marsh systems of the salt water tidal flows that they need to survive. Through this work, we are making important strides.

On September 24^th, the nation is celebrating National Estuaries Day. We ask you to celebrate it with us: take a walk in an estuary (and pick up any trash that you see), go to your library and read Life and Death of the Salt Marsh—a natural history classic written by CLF Board member Dr. John Teal – join an Audubon Society in your state, visit CLF’s estuaries website page to learn about CLF’s restoration projects and support our work, teach your children about salt marshes, or just spend a sunrise looking out at the ocean over a marsh. New England is blessed by our salt marshes; take some time on September 24th to discover why.

To learn more about National Estuaries Day, visit the RAE National Estuaries Day website. To learn more about CLF’s work with RAE, click here.