One man's waste makes another oyster's spawning bed: tons of recycled shells are spread from a barge in the Squamscott River to restore an oyster reef. Photo courtesy of R. Konisky, TNC

Most people don’t realize that oysters are only found in estuaries. At one time, oysters thrived throughout the Great Bay estuary and were highly desired for human consumption. Because oysters filter the water to feed, they also help to remove pollutants and nutrients and play an important role in keeping our estuaries clean.

Unfortunately, it is increasingly difficult to find oysters in the Great Bay estuary due to disease and siltation. In the mid-1990s, the introduction of two parasitic protozoans – Dermo and MSX – caused a large-scale die-off of adult oysters.  Since then habitat changes due to excess siltation from numerous storm events – an impact of Climate Change – has furthered reduced populations. Forty years ago, there were approximately one thousand acres of oysters in the estuary; today, that number is closer to 70 acres.

To help reverse this decline, The Nature Conservancy and the University of New Hampshire have been working to restore populations by building new oyster reefs in the tidal rivers. Reefs are constructed by spreading tons of recycled shells as oyster spawn need a hard surface to settle on. Once in place, seed oysters are added with the hope they will survive and mature to adults.

After working in the Oyster and Lamprey rivers, the Squamscott River is now being targeted. This effort will build upon an existing reef that extends from the railroad trestle towards Great Bay. Working off a barge, crews recently spread 75 ton of recycled shell in hopes of establishing a two acre reef. Some of the recycled shell is from local restaurants collected by the Coastal Conservation Association-NH Chapter, another partner in the project.

Ray Grizzle at the UNH Jackson Estuarine Lab has been testing different brood stocks and general oyster restoration methods to determine how best to move forward. “During 2012, we hope to be able to conduct in collaboration with EPA scientists a comprehensive assessment of all the major restoration sites we have worked on since 2000. The aim of this effort will be to better determine what has worked and what hasn’t so we can improve the design – and the success – of future projects.”

Support for this year’s restoration project comes from several sources, including federal grants and State of NH Moose Plate funds. CLF and TNC have also been working together to make oyster restoration part of a recent settlement between EPA and Grimmel Industries.

For years, the massive scrap metal facility owned by Grimmel has discharged heavily contaminated stormwater into the Piscataqua River. As a direct result of CLF’s advocacy, the facility has been required to implement significant upgrades to address toxic stormwater pollution runoff into the Piscataqua River. During EPA’s enforcement process, CLF urged EPA and Grimmel to develop a Supplemental Environmental Project to restore oyster and eelgrass habitat in the estuary and worked with Ray Konisky of TNC to develop a restoration proposal. EPA embraced the approach, leading to a commitment by Grimmel to fund an oyster and eelgrass restoration project next year.

While any new oyster reef is a welcome addition, the health of the estuary continues to decline from nitrogen pollution. By filtering the water, oysters are an effective nitrogen-reducing agent. However, they are only a small part of the solution and much more needs to be done such as upgrading local wastewater treatment plants and reducing the amount of stormwater entering the estuary.

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For more, visit: http://www.clf.org/great-bay-waterkeeper/. You can also follow me on Facebook and Twitter.

Me on a recent beautiful day on the Great Bay estuary.

I’m thrilled to be launching an important and much needed effort to restore and protect the health of our treasured Great Bay estuary: CLF’s new Great Bay-Piscataqua Waterkeeper program.

As the Great Bay-Piscataqua Waterkeeper, I’ll be devoting all my time and effort to protecting this remarkable water resource – a resource that is threatened by pollution and deserves all the attention it can get. It’s a place I’ve come to know well through 20 years of managing the Great Bay National Estuarine Research Reserve, and by living in nearby Newmarket. The threats to the Bay have never been clearer, the opportunity to fix them never greater.

The objective of the Great Bay-Piscataqua Waterkeeper program is to work for and protect the health of the waters making up the Great Bay estuary – our major bays (Great Bay and Little Bay), our tidal rivers (the Piscataqua, Salmon Falls, Cocheco, Bellamy, Oyster, Lamprey, Squamscott and Winnicut Rivers), and our wonderful harbors and creeks (Portsmouth and Little Harbor; Spinney, Spruce and Sagamore Creeks). Each of these water bodies, on their own, is an important natural resource. Together, they comprise a remarkable and rich ecosystem that is under threat..

Population growth, sprawl, and outdated water infrastructure are all contributing to the decline of the Great Bay estuary. Pollution levels have increased, leading to the loss of critical habitat within the estuary. Reversing these trends will require a multi-pronged approach including: the need to invest in improved  infrastructure, such as sewage treatment plants; innovative approaches to reducing existing stormwater pollution; and better planning to prevent future sprawl development and the water pollution it causes.

My work as the Great Bay-Piscataqua Waterkeeper will include:

• advocating for needed policies and compliance with environmental laws such as the Clean Water Act,
• working with scientists and the many stakeholders involved in efforts related to the Great Bay estuary, and
• keeping a watchful eye on waters within the estuary.

Most importantly, I look forward to building a much stronger public voice for the estuary. Just as there are many people and organizations that care about the health and future of the Great Bay estuary, there are many more people who will care, and lend their voices to protecting this amazing water resource, once they learn more about the threats it’s facing. It’s my goal to grow the chorus of concerned citizens about our Great Bay.

I first learned about Great Bay 40 years ago as an undergraduate at the University of New Hampshire. I quickly fell in love with its beauty and richness and worked with others to reject the proposal by Aristotle Onassis to build the world’s largest oil refinery on the shores of Great Bay. These efforts led to the creation of the Great Bay National Estuarine Research Reserve – a Reserve I had the privilege to manage for more than 20 years, from its inception in 1990 to 2011.They were rich, wonderful years that provided me the opportunity to work with a wide diversity of dedicated individuals committed to saving this very special place.

Having worked on Great Bay matters for more than two decades, I am deeply concerned about the declining health of the estuary. Just as its threats are many, so too are multiple solutions are needed. We’re all in this together; only through greater public action can we protect the valuable ecological, recreational and cultural benefits of this remarkable resource. It’s a major challenge, but it’s one I welcome working on with you.

Please contact me with questions or concerns about the Great Bay estuary (603.498.3545, or pwellenberger@clf.org), and stay informed about my work by visiting www.clf.org/great-bay-waterkeeper.