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Enter to Win a One of a Kind Surfboard and Help Us Keep Casco Bay Blue

Thank you to Allagash Brewing Company, Grain Surfboards, and Neto Shapes for teaming up to create a one-of-kind surfboard to help keep Casco Bay blue.

The raffle for this surfboard is now closed.

Join us on Wednesday, September 4 at 4pm as we draw the winning raffle ticket at  Allagash’s tasting room, 50 Industrial Way, Portland.

Winner need not be present to win.

We will contact you via email if you are the winner.

The Board:

Grain Surfboards model: The Root

Dimensions: 8’ x 6” pintail
The custom-shaped board features Maine white cedar and accents with wood from Allagash Brewing Curieux barrels. The fin will be made by Neto Shapes and it, too, is made in part from Allagash Curieux barrel wood.

Valued at: $2,500

This specific board was specially made by Grain in conjunction with Allagash Brewing Company and Neto Shapes to support Friends of Casco Bay’s efforts to protect the coastal waters we all love.

Aptly named to represent where Grain began, the Root continues to be one of the company’s most popular boards. This nimble pintail is a performance-style longboard, meaning it is designed with speed generation and maneuverability in mind, while remaining a super fun cruiser of mellow surf. The Root excels in a myriad of conditions, having the speed and control to handle zippier beach breaks or the bigger stuff — plus the volume to catch all the waves you want on a small day. While Grain has grown quite a bit from its roots, this Root remains a dominant classic.

If you have questions about the surfboard or the raffle, please email Will Everitt, willeveritt [at] cascobay [dot] org

If you would like to support Friends of Casco Bay’s work directly rather than (or in addition to!) buying raffle tickets, click here.

Is it good green or bad green?

Many thanks to our Volunteer Water Reporters for keeping an eye on algal blooms—and other concerns around Casco Bay.

We shared these things to think about as they surveyed conditions around the Bay this summer. We are sharing it here as others may be interested as well.

A little algae is a good thing.

Nitrogen is one of the three most important “food groups” for plants. It is also one of the primary components of fertilizer, along with phosphorus and potassium. In the ocean, nitrogen is generally the critical element needed for plant growth. Algae, ranging in size from microscopic phytoplankton to sinuous seaweeds, form the base of the ocean food web.

Too much algae—when it covers a large area of the flat—is cause for concern.

Excess nitrogen can stimulate algal growth beyond healthy amounts for the ecosystem.

Nuisance algal blooms can cover tidal flats with a thick carpet of “green slime,” smothering animals below the mat and preventing juvenile clams from settling into the mud. Large phytoplankton blooms can reduce water clarity.

When the algal mats die, they release carbon dioxide. The carbon dioxide mixes with sea water to create carbonic acid, in a process known as coastal acidification. Coastal acidification changes water chemistry and can make it harder for shellfish such as oysters, clams, and mussels to build and maintain their shells.

For more information on excess nitrogen and green algae visit cascobay.org/our-work/science/nuisance-algal-bloom-tracking.

Observing and recording observations of an area regularly helps us track algal blooms around the Bay

We want to see images of algae from the small amounts to “concerning” amounts because we can’t predict where and when an outbreak may become a nuisance algal bloom.

To better document and track algal blooms spreading to worrisome levels, we encourage Water Reporters to choose a specific location to observe weekly, ideally an hour before or after low tide. More details at cascobay.org/water-reporter/#WRalgalblooms.

Go back every week—just not at the same time on the same day the next week! The time of low tide differs every week. For example, if it is low tide at 10 a.m. one Wednesday, low tide will be closer to 4 p.m. the following Wednesday. The tidal cycle changes by about 52 minutes each day. Tide charts can help you plan your visit: https://me.usharbors.com/monthly-tides/Maine-Southern%20Coast or use a tide app. You do not need to visit on the same day each week.

Green is really good news when it is eelgrass! 

The presence of eelgrass is a sign of healthy water, so share photos using another hashtag: #eelgrass.

Share your #eelgrass posts in celebration of healthy marine waters! We also want posts of places that used to have eelgrass but don’t now.

Eelgrass (Zostera marina) is one of the few flowering plants found in the ocean. It grows in shallow water on sandy or muddy bottom, and its long blades grow to 30 centimeters (11 inches) or more. Eelgrass needs clean, clear water to grow, so the presence of eelgrass is a visible sign that water quality is healthy in a location.

How do you tell the difference between eelgrass and green algae?

Eelgrass is usually a less bright green than green algae and is usually underwater. You may see it at the water’s edge at low tide, when the tops of the blades may be seen floating on the surface, as seen in the photo above. In contrast, green algae is usually further up the shore and is often exposed at low tide.

The image to the right shows eelgrass that has been washed ashore. From a distance, this can look like a green algal bloom.

Why do we love eelgrass?

  • It provides essential habitat for fish, crabs, and shellfish
  • It produces oxygen
  • Its roots anchor sediments
  • Its long, flowing leaves dampen wave action
  • It improves water quality by tempering the effect of ocean acidification because eelgrass captures and stores carbon dioxide.

Because eelgrass is such important habitat, it is essential to not disturb or trample it!

“A drowned island of shelter and security for many animals” is how Rachel Carson described the sinuous sea meadows that grow just beneath the surface of the Bay. Many commercially-important species, including flounder, striped bass, cod, lobsters, crabs, mussels, and scallops, use eelgrass beds as a nursery area, feeding ground, or refuge from predators. Dead eelgrass decomposes into a “sea soup” that is an essential part of the marine food web.

 

Get close! A close-up photo can help us to identify the green growth. 

Be careful where you step. We don’t want you falling and getting hurt, treading on private property, or damaging growing eelgrass.

 

Thank you to our Water Reporters!

And how is your summer going?

Summer is going swimmingly here at Friends of Casco Bay, and we have a lot of good news to share:

  • Our priority legislative bill to create a state-level Climate Change and Ocean Acidification Council was incorporated nearly word-for-word into the Governor’s comprehensive Climate Change Council bill. An Act to Promote Clean Energy Jobs and to Establish the Maine Climate Council passed with strong bipartisan support. In recognition of her yeoman’s work on this issue, Casco Baykeeper Ivy Frignoca was invited to attend the bill signing by Governor Janet Mills on June 26th.

 

  • Our water quality sampling season is well underway, as we continue to add to our long-term dataset at 22 shoreside and deepwater sites around the Bay. You may see Research Associate Mike Doan and Casco Baykeeper Ivy making the rounds by land and by sea every few weeks from April through October.

 

  • Photo by Kevin Morris

    Since early June, Executive Director Cathy Ramsdell has been attending bi-weekly meetings of the South Portland Fertilizer Working Group to assist the City in drafting a fertilizer ordinance.

 

  • July 20 marks the third anniversary of the launch of our Continuous Monitoring Station in Yarmouth. Our Monitoring Station is fondly nicknamed the “Cage of Science” because its high-tech sensors are housed inside a transformed lobster trap. The instruments measure temperature, salinity, oxygen, pH, and carbon dioxide.
    Photo by Kevin Morris

    Together, they collect data once an hour, every hour, year round.  At this time of year, Mike has to scrape off a new array of marine hitchhikers whenever he hauls up the Cage of Science to download data.

 

  • ‘Tis the season to think about what not to put on your lawn! With five workshops behind her, Associate Director Mary Cerullo has scheduled another five BayScaping presentations for August and beyond. She is happy to talk with neighborhood groups about green yards and a blue Bay.

 

  • There has been such a demand by community groups to volunteer for coastal cleanups and storm drain stenciling projects that Community Engagement Coordinator Sarah Lyman and summer intern Alexis Burns have been very busy. They already have hosted seven events with 106 participants who collected an estimated 238 lbs. of trash and stenciled 238 storm drains!

 

  • Photo by Kevin Morris

    Our new pumpout boat, Headmaster, was launched on June 10th to pump raw sewage from the marine toilets of recreational boats. Captain Jim Splude, our congenial pumpout boat coordinator, can go about his business more efficiently now with a new boat that has more than twice the holding capacity of the old one.

 

  • Our Water Reporter volunteer project is expanding as we hoped and planned. Nearly 40 enthusiastic volunteers attended our Water Reporter training on June 24. Volunteers continue to sign up to keep watch over specific areas of the Bay.
    July 10 was the first anniversary of Friends of Casco Bay’s launch of the Water Reporter app. To date, 162 volunteers in this observing network have made more than 500 posts. We call that a great start!

Our growing observing network on Casco Bay

Yesterday was the first anniversary of our launching Friends of Casco Bay’s Water Reporter effort. To date, 162 volunteers have made more than 500 posts. We call that a great start!

A standing-room only crowd of 37 Friends of the Bay gathered in South Portland on June 24th for an informal training on the app. Community Engagement Coordinator Sarah Lyman, volunteer Rick Frantz, and summer intern Alexis Burns guided newbies and veterans through the steps to post and comment on what they are seeing on the water.

Sarah explained that using hashtags to identify the type of incident helps organize reports. “If you are having trouble remembering the types of posts we are looking for and the hashtags to use, think WATERS!”

W  #wildlife
A   #algae
T   #trash
E   #erosion
R   #reportpollution
S   #sealevelrise

Although many of the posts expose concerning events happening on the water, Sarah reminded the group that we all care deeply about Casco Bay, so we also should share images that represent the reasons we love living near the Bay. You can see all of the Casco Bay related posts on Water Reporter here.

Great questions from the volunteers showed that they already had a good grasp of the Water Reporter app. After Sarah answered questions, she referred people to our website to reinforce her explanations. We recently updated our guide, www.cascobay.org/water-reporter, to include detailed instructions for posting on iPhone or Android device and troubleshooting tips.

After the training, Trish Peterson posted, “The water reporting training we recently received was confidence building for sure. Water reporting is not only interesting, but fun!”

Our summer intern Alexis Burns explained that she is monitoring nusiance algal blooms at three locations in South Portland on a weekly basis: Mill Cove behind Hannaford Supermarket, Pleasantdale Cove off Broadway, and behind Forest Lawn Cemetery on Lincoln Street.

Several people offered to help track nuisance algal blooms at specific locations around the Bay.

Sarah explained that we are connected to a worldwide network through our engagement with the Water Reporter app, developed by a group called Chesapeake Commons. Erin Hofmann, their Data Science and Communications Lead, told us, “Friends of Casco Bay is one our most active groups in terms of members, number of posts, and endurance of ongoing efforts. Some groups get their volunteers to share reports on one issue or event, and then fade away – but the Friends of Casco Bay team has found some really great ways to train volunteers and then keep them active and engaged on the app.”

The map showing the many locations around the Bay where our volunteers have posted images speaks for itself! Kudos to our Casco Bay Water Reporters!

Water Reporter App

Water Reporters: you are a growing observing network on Casco Bay

Water Reporters, this is your reference for using the Water Reporter app. It summarizes the topics covered at the Water Reporter training event held in June 2019. We are so pleased to see how volunteers like you are having an impact by being Water Reporters.

Types of Water Reporter Posts we want to see

Water Reporter App
“The more people who use Water Reporter, the better chance we have to tackle problems that otherwise may go unnoticed.” – Volunteer Rick Frantz

There are a variety of posts that are helpful. Using hashtags to identify the type of incident you are reporting helps organize your reports. If you are having trouble remembering the types of posts we are looking for and the hashtags to use, think WATERS!

W  #wildlife
A   #algae
T   #trash
E   #erosion
R   #reportpollution
S   #sealevelrise

Resources

We have new resources on our Water Reporter webpage. Some sections that may be of interest to you:

 

You can help us collect observations on two special issues we are tracking.

Nuisance Algal Blooms (#algae)

At the training, several people offered to help track nuisance algal blooms at specific locations around the Bay. We are still looking for volunteers to cover the following locations on a regular basis:

If you would like to take part by visiting one of these sites weekly, slyman [at] cascobay [dot] org“>let me know and I’ll send you the instructions.

Sea Level Rise (#sealevelrise)

#sealevelrise is all about capturing photos of extreme high tides and storm surges and their impacts on our coast. Water Reporters are helping us envision what our coastline may look like in the future as sea levels continue to rise:

  • when there is a King Tide, a predicted extra high tide, or
  • when we have storm surge.

When these two conditions happen at the same time, we see the greatest impact. You can see more about this on the Water Reporter webpage as well. Click the Sea level rise tab in the Special Water Reporter Posting Types section. The next opportunity to document a King Tide will be during the first few days of August.

Need help or can’t find what you are looking for?

Contact me via email: slyman [at] cascobay [dot] org, or text or call at (207) 370-7553.

Please keep your posts and questions coming! We are here to help you with Water Reporter, as it is quickly becoming an essential part of our work.

Maine takes a BIG step forward to address climate change

Photograph by Kevin Morris • Aerial support provided by LightHawk

We have good news to share: on June 19, 2019, the Maine Legislature passed LD 1679, Governor Janet Mills’ bill to establish the Maine Climate Council.

We fervently supported the Governor’s bill because it focuses on the root causes of climate change and recognizes that we must act now to remediate and adapt to inevitable change. The Governor’s bill incorporates many elements of a bipartisan bill that Friends of Casco Bay and the Maine Ocean and Coastal Acidification (MOCA) partnership championed: LD 1284: An Act To Create a Science and Policy Advisory Council on the Impacts of Climate Change on Maine’s Marine Species. Many Friends like you contacted the Legislature in support of that bill.

Ivy Frignoca, Casco Baykeeper and the coordinator of MOCA, says, “We could not be more excited about the Governor’s Climate Council bill. It takes on the herculean but necessary task of drastically reducing carbon emissions while setting up a council with subgroups of experts to help us address and adapt to inevitable changes. As the voice of Casco Bay, we strongly commend those portions of the bill that address the impacts of climate change — including ocean acidification — on Maine’s iconic marine resources.”

The Governor’s bill establishes six working groups, including a Coastal and Marine Working Group and a Scientific and Technical Working Group. We anticipate that many of the aspects of our collective efforts to address coastal and ocean acidification will be addressed by these groups. To aid that process, Friends of Casco Bay, as coordinator of MOCA, will meet with other partnership members this summer to create a marine climate change action plan. We look forward to sharing that plan with the Governor’s Council and will stand ready to serve as a resource to the Council.

Aquaculturists, resource harvesters, and lobstermen supported passage of this legislation. Bill Mook, owner of Mook Sea Farm, says “For those of us whose livelihoods are so tightly linked to a healthy environment, the passage of Governor Mill’s climate bill has rekindled hope. We must now show the rest of America how the path to a clean energy future will not only lead us to a healthier environment, but it will also take us to a vibrant, inclusive, and healthy economic future.”

Richard Nelson from Friendship, Maine, applauds the positive approach the state is taking on climate change, “As a lobsterman and, at times, spokesman for climate’s ill effects on the ocean’s realm, I would readily shed that position as harbinger and turn instead to being a participant in the real actions to combat it, as put forth in the Governor’s bill.”

The comprehensive bill sets tough goals to reduce Maine’s carbon footprint. It provides that by 2050, Maine must reduce our greenhouse gas emissions by 80% and get 100% of our electricity from renewable sources. The bill sets a pathway for achieving the goals in a statewide plan in order to turn these targets into actions. At a time when the federal administration is resistant to exploring mitigation and resiliency efforts, Maine is joining a growing number of states taking the lead to address climate change to collectively make a difference.

Governor Mills is expected to have a signing ceremony for the bill soon, and the Climate Council will likely begin its work this fall.

Headmaster sets the standards for a clean Casco Bay


Captain Pam Parker christened the newest member of Friends of Casco Bay’s fleet with the words, “We name you Headmaster. May the elements be kind, your captain wise, and the Bay rejoice in your work.”  More than 100 Friends of the Bay cheered as Portland Yacht Service’s giant blue travel lift Babe lowered our newly-named pumpout boat into Casco Bay. Our 26-foot pumpout boat is a very unique vessel that siphons raw sewage from the holding tanks of recreational boats, transferring the wastewater for shoreside treatment.

The ceremony on Monday, June 10, was emceed by Executive Director Cathy Ramsdell, who explained that the boat’s name, Headmaster, was chosen from the nearly 400 names submitted by the public. Fittingly, the name puns on the nautical term for a toilet — “head” — and gives a nod to the educational and ambassadorial role of our Vessel Pumpout Program.  To see photos from this event, visit the photo album on our Facebook page.

Through her work overseeing the state pumpout program at the Maine Department of Environmental Protection, Pam has been the facilitator for the federal support for our pumpout program for over two decades. Funding from the federal Clean Vessel Act financed 90% of the cost of the new boat. Our Pumpout Program has kept over 200,000 gallons of raw sewage out of the Bay since 1995.

Headmaster, built expressly for Friends of Casco Bay by Marine Boatbuilders of Warwick, Rhode Island, has a 650-gallon sewage holding tank, twice the capacity of our earlier pumpout boat, Wanda. From 1995 through 2018, Wanda pumped out marine toilets at marinas and moorings from South Portland to Freeport. She continues to be a champion for clean water in her new home at the Boston Sailing Center in Boston Harbor.

Headmaster’s Captain, Pumpout Coordinator Jim Splude is our ambassador on the Bay. In addition to servicing recreational boats from May through October, he is happy to teach customers how to perform the task themselves. Jim also educates boaters on the importance of keeping sewage, bacteria, and excess nitrogen out of the Bay.

Our Pumpout Program has done more for the health of the Bay than just serving recreational vessels. In order to become a No Discharge Area, a designation that protects our waters from cruise ship pollution, the EPA required that there be adequate pumpout facilities throughout the region before granting this designation. We encouraged local marinas to install their own pumpout stations while leading an advocacy effort to encourage Maine to request a no discharge status for the Bay. Our Pumpout Program then set the stage for Casco Bay to become Maine’s first federally-designated No Discharge Area, which prohibits vessels from dumping treated and untreated sewage.

This mobile pumpout service is part of our efforts to reduce nitrogen pollution from sewage, fertilizers, stormwater runoff, and air pollution. An overdose of nitrogen in coastal waters can trigger nuisance and harmful algal blooms that may reduce water clarity, prevent juvenile clams from settling, and suffocate animals in the mud. When these plants die, decomposing bacteria can deplete oxygen needed by marine life and create acidic conditions that make it harder for shellfish, such as clams, mussels, and oysters, to build and maintain their shells.

Learn more about our mobile pumpout service at: https://www.cascobay.org/how-to-help/pumpout/.

It Takes a Village

Rick Frantz keeps an eye on Casco Bay as he commutes between his home on Great Diamond Island and Andy’s Old Port Pub, the restaurant that he and his wife Jennifer Fox own on the Portland waterfront. When he sees something out of the ordinary, good or bad, he takes a photo using the Water Reporter app on his smartphone. During his work day, Rick may pause to capture images of an extreme high tide flooding the waterfront or trash adrift in the Bay.

Rick was one of the first friends of Casco Bay to start using the app that is building a network of observers to document, organize, and share their posts. Rick is an incredible ambassador for this volunteer effort. He has been recruiting friends and neighbors to join the observing community.

Community Engagement Coordinator Sarah Lyman oversees the program. She says, “Water Reporter is transforming how we connect with our volunteers to identify and help us address threats to the Bay, building a community around clean water.”

Water Reporter App
“The more people who use Water Reporter, the better chance we have to tackle problems that otherwise may go unnoticed.” – Volunteer Rick Frantz

Currently, 114 Water Reporters are recording their observations on how the Bay may be changing. These observations can be cause for worry or for celebration. One day, Rick posted a photo of a large accumulation of fish scales floating near a wharf. His report, complete with date, time, and location, led to the Department of Environmental Protection halting unpermitted discharges from a fishing vessel.

Another day, Rick noticed a new patch of eelgrass growing off Diamond Cove, a sign of healthy waters. Having a smartphone or camera at the ready encourages volunteers to capture unusual events, like his neighbor’s sighting of nearly 200 cormorants and gulls herding fish onto the shoreline of Great Diamond Island.

A photo is worth a thousand…

Rick's Water Reporter Post on #sealevelrise
A screenshot of one of Rick’s posts on Water Reporter

In keeping with our focus on climate change, we encourage volunteers to use Water Reporter to monitor sea level rise. King Tides, the highest tides of the year, give us a glimpse of the future. The photos can document current coastal flooding such as submerged streets and eroding beaches. These images help us all visualize what the “new normal” high tides may look like as sea levels continue to rise.

Chesapeake Commons created the Water Reporter app in partnership with Waterkeeper Alliance (of which we are a founding member). Says Erin Hofmann, Data Science and Communications Lead for Chesapeake Commons, “Friends of Casco Bay is one our most active groups in terms of members, number of posts, and ongoing efforts. Water Reporter has been around since 2014. Every winter, posts would slow to a trickle or stop altogether. I couldn’t believe how frequently posts kept rolling in from Maine this winter — bucking our long-held belief that people don’t engage in environmental efforts in the cold months. Leave it to Mainers to get outside, regardless of the weather, to keep the observations flowing!”

The more of us who are keeping watch on the environmental health of the Bay, the better protected our coastal waters can be. Sign up to become part of our observing network or just check on what is being posted at cascobay.org/waterreporter.

Whither Wanda?

Our trusty pumpout boat Wanda (aka Baykeeper II) kept over 200,000 gallons of raw sewage out of the Bay from 1995 to 2018, siphoning wastewater from the toilets of recreational boats and delivering it to shoreside facilities. After nearly a quarter century of service, it was time for an upgrade.

This spring, we took possession of a new 26-foot pumpout boat, built by Marine Boat Builders Company of Warwick, Rhode Island. Our new boat will enable us to haul 650 gallons of sewage — more than twice the capacity of our old workhorse.

Before our pumpout boat was on the scene, local boaters reported seeing raw sewage floating at popular anchorages. People sometimes said they got swimmer’s rash from being in the water.

Our Pumpout Program does more for the health of the Bay than just servicing recreational vessels. Our knowledge of pumpout facilities helped encourage local marinas to install their own pumpout stations. An added benefit of our pumpout advocacy: We led the charge for Casco Bay to become the first federally designated No Discharge Area in Maine, protecting it from cruise ship pollution. The Environmental Protection Agency requires that a region have adequate pumpout facilities before granting this designation, which prohibits boats from dumping both treated and untreated sewage.

As for Wanda, she will continue to be a champion for clean water in service for Boston Sailing Center in Boston Harbor.

Mike and Ivy on the Boat

Casco Bay Matters: Advancing the conversation—and action—on climate change

Mike and Ivy on the Boat

Living close to the ocean, Casco Bay residents are witnessing the effects of climate change happening here now: warming water temperatures, increasing ocean acidity, and more severe storms. We too are seeing the changes in our data and when we are out on the Bay.

From April through October, our Research Associate Mike Doan and Casco Baykeeper Ivy Frignoca are on the Bay frequently to monitor water quality, follow up on pollution reports, or meet with partners on issues best understood from the water. Their vigilance gives them a firsthand view of changes happening in our coastal waters.

Mike, Ivy, and Executive Director Cathy Ramsdell shared these and other observations in our first-ever Casco Bay Matters series. Nearly 400 people attended Ocean Acidification, Climate Change and You presentations about what we are learning about a changing Casco Bay.

They shared how Mainers are working together to shape policies and actions to respond to these threats. Ivy is coordinating the Maine Ocean and Coastal Acidification partnership, a diverse coalition of scientists, lawmakers, aquaculturalists, and seafood harvesters, who collaborate on research and strategies to confront the threats that climate change and acidification pose to Maine’s marine resources. We also are working with legislators to pass a bill to create a state-sponsored Science and Policy Advisory Council on the Impact of Climate Change on Maine’s Marine Species.

Video Recordings of Casco Bay Matters:

Casco Bay Matters Intro Video

If you missed our Casco Bay Matters presentations of Ocean Acidification, Climate Change and You, you are in luck — our stalwart volunteer Deb Dawson recorded and edited videos of our South Portland (March 25, 2019) event. See the series of three videos on our YouTube channel.

Highlights from Casco Bay Matters:

Warmer waters: Friends of Casco Bay has been tracking water temperatures for over a quarter century. On average, water temperatures in Casco Bay have risen 2.5°F (1.4°C) since 1993. The growth, reproduction, and survival of marine life are influenced by temperature.

Rising Water Temperatures in Casco Bay

More carbon dioxide in our coastal waters from air and from land: We know that burning fossil fuels adds carbon dioxide to the atmosphere, trapping heat and warming the planet. Nearly 30% of atmospheric carbon dioxide is absorbed by the ocean. Carbon dioxide mixes with water to form carbonic acid, making the water more acidic. This is ocean acidification.

Maine’s nearshore waters are also at risk from coastal acidification. Excess nitrogen from sewage treatment plants, polluted stormwater, and fertilizers can stimulate massive algal growth. When the algal blooms die, decomposition depletes the area of lifegiving oxygen and releases carbon dioxide, further acidifying the water.

Threats to the ocean food web: More carbon dioxide in our waters means less shell-building material (calcium carbonate) for clams, mussels, and planktonic creatures that support the ocean food chain. Data from our Continuous Monitoring Station enable us to calculate the calcium carbonate saturation state — what scientists term omega aragonite — which can tell us whether, at any given time, enough calcium carbonate is readily available to shell-building creatures. Shell formation becomes more difficult for some species when the amount of available calcium carbonate falls below a 1.5 aragonite saturation state.

Our data indicate that for part of the year, levels of calcium carbonate in Casco Bay fall below the threshold for optimal shell-building for some species.

Sea level rise: As water warms, it expands, and the seas encroach on our coastline. Coastal observers and property owners are reporting more erosion.

Increasing precipitation: Maine has seen a six-inch rise in average annual precipitation since 1895, further threatening coastal properties. Torrential rains intensify erosion and flush overloads of nitrogen, pollutants, and sediments into coastal waters.

Those who depend upon the sea can attest to the fast pace of change. What do these changes mean for Casco Bay?

  • As oceans become more acidic, we can anticipate more pitting or thinning of the shells of many commercially viable species in Casco Bay, such as clams, mussels, and oysters.
  • Voracious green crabs — which eat juvenile shellfish — thrive in warming waters.
  • Rising water temperatures are linked with shell disease in crustaceans, directly impacting Maine’s iconic lobster fishery.
  • Scientists and lobstermen are documenting lobster populations shifting north and east.
  • Copepods, tiny crustaceans that are the main food source for juvenile lobsters, may not be as plump as they once were. In laboratory experiments that simulate climate changes now happening in the Gulf of Maine, copepods were less fatty. With a less nutritious diet, young lobsters must divert energy from growth and resisting disease to finding enough food to survive.