There has never been a better time to care about the ocean than now. The ocean provides us with so many things – half of the air we breathe, an amazing variety of things to eat, a place of beauty and refuge and sometimes fury. This year the New England coast line was pummeled by tropical storms and Northeasters, reminding us yet again that our glorious ocean is powerful, relentless and unforgiving. Despite our ingenuity and technical know-how, we live in a natural and changing environment and need to better plan and protect our ocean ourselves going forward.

We used to think that the ocean was so big, and life in it so abundant, that nothing we did could harm it or exhaust its resources. But now, because of us, the ocean is changing fast and in dramatic ways. It is getting warmer, more acidic, and ever more crowded – as we consider new uses like tidal and wind energy development in addition to our historic ones like fishing, shipping, sailing and other recreation. The fabric of New England’s ocean ecosystems is changing, too. Previously depleted populations of sharks and seals are on the rise, while other species like Atlantic cod and yellowtail flounder have plummeted. And there’s evidence that the changing ocean chemistry will profoundly affect the entire food chain, from tiny plankton on up.

The time to care is now. With climate change affecting our oceans in ways we are only beginning to understand, now is the time to restore the health of our ocean so that it can be as resilient as possible to the changes that are coming. Ocean conservation has been part of our work at CLF since the mid-1970s when we were a scrappy little organization on Beacon Hill fighting the federal government and the oil industry over oil and gas drilling on Georges Bank – New England’s most important fishing grounds. We won that case, then won it again and again as the oil industry kept knocking on New England’s door. Ocean conservation is part of our history and is embedded in our DNA, and we are still working hard to  protect our ocean and keep it thriving for future generations of New Englanders in many ways:

• Keeping vital habitat protected – special places like Cashes Ledge, a breathtakingly beautiful underwater mountain range 80 miles off the coast of Cape Ann, home to the largest coldwater kelp forest on the North Atlantic seaboard. Cashes Ledge provides rich habitat for many of our most amazing and iconic sea creatures – Atlantic cod and wolffish to bluefin tuna and North Atlantic right whales. Some of these species are on the brink of existence in our waters, and truly need places of refuge to sustain and rebuild their populations. CLF has recently gone to court to keep current protected habitat areas, including Cashes Ledge, closed to destructive trawl and dredge fishing gear.

• Working for an end to overfishing – all the habitat protection in the world won’t help a species recover if the fishing pressure is too high. CLF has been fighting for sustainable New England fisheries for decades, and we still aren’t there. Cod numbers are currently at a very small fraction of what a healthy population would be. We have asked for a moratorium on directed cod fishing until their numbers recover – in opposition to the current political push to increase catch limits. Can you imagine New England without cod? Neither can we – which is why we have gone to federal court against fisheries managers to stop them from increasing catch limits on cod and other imperiled groundfish until the populations are better recovered.

• Supporting our nation’s first regional ocean plan – New England is leading the nation in ocean planning. With the increasing pressures on our rapidly changing water, we need to better coordinate all of our uses to minimize conflict and make decisions based on the whole ecosystem, as opposed to individual uses. CLF has been involved in ocean planning from the start, advising and supporting our states on the Massachusetts Ocean Management Plan and Rhode Island Special Area Management Plan. And now we are actively supporting  development of the nation’s first regional ocean plan by the Northeast Regional Planning Body – made up of state, federal, and tribal representatives and convened pursuant to the National Ocean Policy.

• Celebrating our beautiful ocean – Our New England Ocean Odyssey campaign is all about showcasing the amazing, breathtaking, important, and often strange things that lie beneath our waves. We have one of the most productive, diverse ocean ecosystems on the planet right off our shores, and we hope that by bringing you the gorgeous photography of Brian Skerry and others, and engaging stories, you will be inspired to help us protect it.

• Restoring historic river herring runs – After 18 years, ocean-going alewives (also known as river herring) can return to their ancestral spawning habitat on the St. Croix River in northern Maine and eventually make the St. Croix the largest river herring run in New England once again.  CLF fought for this right on two fronts.  First, we successfully filed suit against the EPA last year to enforce water quality standards, successfully arguing that a 1995 law excluding alewives from parts of the St. Croix river conflicted with the river’s Class A water quality designation under the Clean Water Act. Second, CLF worked with other environmental organizations and the Passamaquoddy Nation to support emergency legislation in Maine to repeal the alewife exclusion law. The alewife, is a “keystone species” that provides food for many animals, birds and larger fish species native to Maine’s marine and fresh waters, and restoring it to its native river habitat is a wonderful reason to celebrate.

We will continue to fight these battles for a healthy ocean so we have more to celebrate next World Oceans Day, and the one after that, and beyond. Please stay with us on our voyage and be part of a better ocean future in New England.

Originally posted on New England Ocean Odyssey.

Now that we are in the throes of a real ocean planning process in New England , how will we protect special places in New England’s ocean? We have both a great responsibility and a great opportunity to do so as we bring people together to make decisions about how we will manage multiple and growing uses in our already busy ocean.

We must identify and protect the beautiful places in New England’s ocean that provide food and shelter and spawning areas that can help our ocean thrive. Places like Cashes Ledge, located about 80 miles east of Cape Ann, Massachusetts. It’s a unique underwater mountain range which provides refuge for a vibrant, diverse world of ocean wildlife.

The steep ridges and deep basins of Cashes Ledge create ideal conditions for marine life as currents mix nutrient- and oxygen-rich water at a depth exposed to sunlight. Home to the deepest and largest cold water kelp forest along the Atlantic seaboard, Cashes Ledge provides an important source of food and a diverse habitat for common New England fish and rare species such as the Atlantic wolffish. This abundance draws in even more ocean wildlife like migrating schools of bluefin tuna, blue and porbeagle sharks, and passing pods of highly endangered North Atlantic right whales and humpback whales.

Cashes Ledge is important not only to marine life but also to scientists hoping to learn about the health and function of New England’s oceans – many scientists believe that Cashes Ledge represents the best remaining example of an undisturbed Gulf of Maine ecosystem. As a result, scientists have used Cashes Ledge as an underwater laboratory for decades.

There are many other beautiful places in the Gulf of Maine, some we know about, and some we may not have identified yet. That’s why it’s essential that our regional planning process includes science-driven work to actively identify and protect these ecologically important areas. The basic chemistry of our ocean is rapidly changing, and if our ecosystems are going to adapt, they will need the space and time to do so. Reducing fishing, shipping, and other pressures on certain areas may be one of the best ways to give them these.

As CLF continues to be extremely active in New England’s ocean planning process, we will also continue highlighting the need to protect New England’s beautiful places and thriving ecosystems.

Under the Ice. Photo by Zach Whalen.

I’ll be honest with you – I tend to stay on top of the water when I’m in the ocean. Or, I try, anyway. As a surfer the goal is to spend as little time underwater as possible. Especially in the winter. But I’m starting to think I’m missing out on something by avoiding the chilly depths of our Gulf of Maine.

The Boston Sea Rovers, one of the oldest underwater clubs in the nation, hosted its 59^th annual show this past weekend, and I was lucky enough to be there with some fellow CLFers. We went to talk about the importance of preserving valuable habitat, like Cashes Ledge, for protecting our fragile ocean ecosystems and helping our dwindling groundfish stocks recover.

We hoped that by showing people Brian Skerry’s beautiful photographs of the gorgeous kelp forest and amazing animals of Cashes Ledge, the divers would be inspired to help us protect it. They were – we got hundreds of signatures on our petition to ask our fisheries managers to protect essential habitat in the Gulf of Maine. And, while we may have gone there to talk, we ended up doing a lot of listening as well. Here are just a few things I learned after spending two days talking with divers:

• The Gulf of Maine is an excellent place to dive. There are so many wonderful animals to see here.
• But visibility often stinks. This is partly due to the very productive nature of our waters. As phytoplankton bloom and the food chain gets going, it gets a little harder to see. Or, poor visibility can be due to human activities in the water (see next bullet).
• The ocean floor looks pretty bad after a bottom trawler comes through. I heard this dozens of times this weekend. “It looks like a freshly plowed field,” said one diver, and you can see the sediment plume from miles away.
• The next time I want to talk to divers about the amazing beauty of Cashes Ledge, I’d better bring a map so they know how to get there and see for themselves.
• The Massachusetts Division of Marine Fisheries, Woods Hole Oceanographic Institution, and the Discovery Channel have partnered to develop a robot that can follow a white shark. Seriously. I saw the footage. More on this later in the month (yes, I am totally geeking out on this).

I also learned that, in spite of difficulties equalizing my ears underwater, there may be ways I can still get down below, if I take things very slowly. I’m pretty stoked to find out if that’s true. My 10 year old son, who was with me this weekend, wants to learn also. Even more motivating!

I’m not sure I’ll be as hardy as diver Zachary Whalen, who took this awesome picture under the ice, but maybe I can at least go down below on a warmer day and watch the seals that I usually only see when they pop their heads up next to me while I surf.  But if there are waves – I’m bringing my board.

Will you help keep this Atlantic wolffish home for the holidays?

For the holidays you can’t beat home sweet home. “Home” means something different for each wildlife species in their ocean habitat of the Gulf of Maine. For example, animals like the Atlantic wolffish  tend to live in rocky areas where they can hide out, guard their eggs and ambush prey. Wolffish depend on this particular type of habitat to live, and other species are just as dependent on other types of habitat. Places such as Cashes Ledge, Jeffreys Ledge and Stellwagen Bank National Marine Sanctuary provide rich habitat for highly depleted cod and haddock, sea turtles and four species of whales.

Most of these three areas in the Gulf of Maine currently benefit from fishing regulations which prohibit harmful bottom trawling, but these protections are temporary. With groundfish populations at their lowest recorded levels, some members of the trawling industry are pushing for regulations to increase trawling in the few protected habitat areas in the Gulf of Maine. After being declared a “fishery disaster,” changes in regulations to allow bottom trawling in Cashes Ledge, Jeffreys Ledge and the only protected portion of Stellwagen Bank National Marine Sanctuary seems counterintuitive to ever devising a long-term strategy that could help restore groundfish populations in the Gulf of Maine. At a time of the lowest recorded groundfish populations in history, how does it make sense to increase bottom trawling in the best, remaining habitat areas?

This week the New England Fishery Management Council (NEFMC) could make some decisions that decide the fate of important habitat areas in the Gulf of Maine. On Thursday, Dec. 20^th, the NEFMC meets to consider fishing catch limits and proposals to allow trawling in currently protected habitat areas. The NEFMC is an important advisory body to the National Marine Fisheries Service, but it is really NMFS who is legally responsible for providing sustainable management of this public resource and it’s NMFS who has the responsibility to adequately protect ocean wildlife habitat. If there is a time to take action to help put this fishery on a path to eventual recovery, it is now.

Other New England fishermen, both commercial and recreational, understand the value of protected habitat and how healthy habitat benefits their own interests. In fact, the recreational fishing advisory panel of NEFMC voted in October to retain all current protections for habitat areas. Recreational fishermen and charter captains from Maine to Rhode Island well know that the cod their clients catch in the Gulf of Maine spawn from areas where large bottom trawlers are not allowed. In the words of one recreational fishing captain, “I’m not an advocate of opening any of the closed areas and dead set against the opening of the WGOM (Western Gulf of Maine) area. You’re destroying the livelihood of the recreational boats and you’re allowing the big boats to compete with the little boats.”

NOAA needs to hear this message loud and clear. Send a message to NOAA to urge the responsible protection of Cashes Ledge and other important habitat areas in the Gulf of Maine. Because, no matter where you celebrate your holidays, healthy ocean habitat is a gift that benefits us all.

One of the fundamental concepts of marine ecology and modern fisheries management is that fish and other ocean wildlife need various types of habitat to feed, grow, and reproduce. Healthy ocean habitat is crucial to the well-being of ocean ecosystems and also provides spawning grounds for commercially important groundfish. New England’s ocean waters are home to several special places that deserve permanent protection.

Cashes Ledge, an underwater mountain range 80 miles off the coast of Maine, supports the largest and deepest kelp forest off the Northeastern United States and is home to an enormous diversity of ocean wildlife – from whales, Atlantic wolffish, and blue sharks, to fields of anemones and sponges. This kelp forest provides an important source of food and habitat for a vast array of ocean wildlife. Other places such as Jeffreys Ledge and Stellwagen Bank National Marine Sanctuary provide rich habitat for highly depleted cod and haddock, sea turtles, and four species of whales.

Most of these three areas in the Gulf of Maine currently benefit from fishing regulations which prohibit harmful bottom trawling, but these protections are temporary. Some of the largest commercial fishing trawlers in the region are pushing for changes in regulations to allow bottom trawling in Cashes Ledge, Jeffreys Ledge and the only protected portion of Stellwagen Bank National Marine Sanctuary.

After the last cod crisis in the 1990s the New England Fishery Management Council (NEFMC), after a court decree spurred by a CLF legal action, designated Cashes Ledge and an area known as the “Western Gulf of Maine” which holds Jeffreys Ledge and 22% of Stellwagen Bank National Marine Sanctuary, as “mortality closures.” The action restricted destructive trawling, but it allowed a wide array of other commercial fishing gear such as bottom gillnets, purse seines, hook and line and more the questionable practice of “mid-water trawls,” which despite their name, often catch groundfish. Recreational fishing and charter boats were not restricted.

This single protective measure restricting commercial bottom trawling helped to restore seriously depleted populations in these areas. Moreover, protecting areas like Cashes Ledge created the “spillover effect” where larger populations of fish migrate out of the boundaries of the protected area. This is why commercial fishing vessels often “fish the borders” of protected areas.

After a new stock assessment released one year ago showed that populations of cod, haddock and other groundfish were at all time lows, the National Marine Fisheries Service (NMFS) under pressure from some of the largest trawlers in the New England fleet started to hint that allowing bottom trawling in previously protected habitat areas – places like Cashes Ledge – might help to increase falling harvest amounts. At a time of the lowest recorded groundfish populations in history, how does it make sense to increase trawling in the best, remaining habitat areas?

This is why we must urge NOAA to keep our habitat protections in place.

Cashes Ledge is important not only to fish and ocean wildlife but also to scientists hoping to learn about the health and function of New England’s oceans. Many scientists believe that Cashes Ledge represents the best remaining example of an undisturbed Gulf of Maine ecosystem and have used Cashes Ledge as an underwater laboratory to which they have compared more degraded habitat in the Gulf of Maine.

The basic fact is that opening scarce protected habitat in the Gulf of Maine to bottom trawling at a time of historically low groundfish populations is among the worst ideas for recovering fish populations and the industry which depend upon them. But fisheries politics in New England remain. On Dec. 20^th the NEFMC may take action through a backdoor exemption process to allow bottom trawling in a large portion of Cashes Ledge and other areas. NOAA needs to keep current protections in place. CLF is committed to securing permanent protection to ensure the long-term health of this important and vulnerable ecosystem. Click here to urge NOAA to protect New England ocean habitat and help ensure a healthy future for New England’s ocean.

A red cod swims in the healthy kelp forest on Cashes Ledge

Note: This blog was originally posted on One World One Ocean as part of their National Sustainable Seafood Month Campaign. 

When you buy a piece of cod, do you wonder how many are left in the ocean? Are you curious about what kind of gear was used to catch the fish? Gillnets? Hooks? Or, maybe it was a bottom trawler? Do you consider a different choice – maybe there is a more sustainable fish to buy?

These are important questions to ask, but there’s something more basic to consider as well. Where do these fish live? What essential requirements do these animals have to survive and thrive in the ocean?

Figuring out what “sustainable seafood” means is a familiar dilemma for New Englanders. We have some of the most productive fisheries in the world, but we also have some of the most heavily fished areas in the world. New Englanders work very hard to manage our fisheries, and there is much we are still learning. Yet, there is one simple fact that scientists and many fishermen are very confident about – if fish don’t have healthy habitat, then we don’t have fish.

We have some very special ocean places in New England. Cashes Ledge, an underwater mountain range about 80 miles off the coast of Maine, is home to the deepest and largest continuous kelp forest in all offshore waters along the US east coast. Stretching 22 miles long and 17 miles wide, Cashes Ledge provides food and shelter to an enormous diversity of creatures – from bottom-dwelling tube worms and sponges to endangered North Atlantic right whales and highly migratory blue sharks and Atlantic bluefin tuna. Cashes Ledge is also rich in a variety of groundfish including Atlantic cod, white hake, monkfish, haddock, and redfish. Many kinds of offshore sea birds can be found dining here, such as sooty shearwaters and Wilson’s storm-petrels.

The reason for such enormous diversity and richness lies in the mountain range itself, whose pinnacles interrupt the primary Gulf of Maine current and create a stunning oceanographic phenomenon known as internal waves, which carry high levels of nutrients and oxygen from the sea surface to the sea floor. This unusual circulation pattern results in an incredibly productive ecosystem. It’s no wonder that scientists have used Cashes Ledge as an oceanographic research lab for decades. It represents one of the healthiest existing marine habitats, and if more of the ocean was like it, there would be a lot more fish.

In 2002 many habitat areas in the Gulf of Maine, including Cashes Ledge, were protected from harmful bottom trawling, and these areas have begun a slow recovery. But as large reductions in the catch of cod, yellowtail flounder, and other groundfish loom in New England, there is increasing pressure to open these areas again. Places like Cashes Ledge must be protected if we are going to keep relying on our oceans to feed us and allow our ocean ecosystems to regenerate and thrive. These are irreplaceable resources, and the permanent protection of marine habitat should be a top priority for any sustainable fisheries management plan.

While it is important to think about fish in numbers – how many we catch, how big they are, how many are left – it is equally important to consider the ecosystem on a larger scale, with all its moving parts, dependent on each other for survival. When do the plankton bloom, and where? Where are the currents taking the food? Where will certain fish spawn if their favorite ledge is dragged? How will the animals adapt to our warmer, more acidic oceans?

So, as we celebrate National “Sustainable” Seafood Month, take a moment to consider where your seafood lived before it was on your plate. The ocean ecosystems that produce the oxygen in 2 out of every 3 breaths we take, regulate our climate, drive tens of billions of dollars of economic benefits, and provide us with considerable recreational activities won’t continue to produce such benefits unless we do a better job at protecting the basic components of a healthy ocean. And, while you enjoy the good decision you made about your sustainably caught fish, also be thankful that the fish came from a good home, and do what you can to help keep it that way.

Help support habit protection for special places like Cashes Ledge – click here. 

The beauty, health, and wealth provided by the productivity of New England’s ocean is illustrated in the diversity of ocean and coastal habitat found in the Gulf of Maine, Georges Bank, southern New England waters, and the far edge of the Outer Continental Shelf. New England’s ocean habitats provide a huge economic service, but only if the underlying ecological foundation is healthy and sustained. Pushing our ocean waters to produce more fish and seafood than is sustainable can lead to a severe decline in goods and services – as we are seeing with the most recent groundfish depletion crisis – or even to an unrecoverable collapse as has happened in eastern Canada.

There are really two major components to a healthy ocean: don’t take out too much in the way of fish and other living resources and don’t put in too much in the way of runoff, nutrients, carbon dioxide, and other pollutants. In New England’s celebrated cod and groundfish fishery we have clearly been taking out too much through decades of overfishing. The National Oceanic and Atmospheric Administration (NOAA), at the request of the New England Fishery Management Council, has for years taken the riskiest possible approach to managing fish stocks. NOAA and the Fishery Management Council have set catch limits at the highest levels allowed by law and then shown great surprise when fish stocks fail to recover.

We need NOAA to show proactive leadership by ensuring a more precautionary approach to setting annual catch limits and to rebuilding fish populations. Decades of unsustainable catch levels should not continue to plague New England’s fisheries or our ocean’s health.

The other problem of overfishing is that the methods used to catch fish have gotten more destructive. Since the development of more powerful engines and sonar during World War II, fishing vessels can go farther out to sea, fish in deeper water, and drag heavier bottom trawls. These inventions not only catch a lot more fish, but also cause more damage to ocean bottom habitat – the kelp beds, boulders and rocky fields, tube worms, anemones, sponges, corals, and mussel beds which serve as nurseries and spawning areas. Over decades we are left with cumulative impacts to large areas of New England’s ocean habitat.

This makes the remaining special areas such as Cashes Ledge even more important as a place where small fish can grow and become large enough to reproduce.

In New England, NOAA is headed in reverse on its legal responsibility and the ecological necessity to further protect juvenile groundfish in their nursery grounds. The commercial fishing industry, led by big trawlers, has argued for opening these nursery grounds. Areas of sea bottom that provide essential fish habitat must be protected from destructive fishing practices like trawling and dredging.  For nearly a decade regional fishery managers have failed to take serious action to protect essential fish habitat.  It’s time to make habitat conservation a priority.

The Conservation Law Foundation, our conservation partners, marine scientists, fishermen, and ocean users agree that permanent habitat protection is needed for Cashes Ledge and other special places.

Join our statement to NOAA asking for their leadership. Click here to urge NOAA to protect our ocean beauty, health, and wealth.

Brian Skerry and Luis Lamare get ready to photograph Cashes Ledge on their recent dive. Photograph by Christian Conroy.

What’s so special about Cashes Ledge? In this second of a planned series of dives on this New England biodiversity hotspot, Brian Skerry was joined by marine ecologist, Jon Witman, an expert on Cashes Ledge.  Jon has been studying Cashes Ledge for 35 years, and has been watching how the diversity and abundance of sea life has been changing there, and how it has responded to its current limited-protection status. We talked to him and found out more about why Cashes Ledge is so important to the Gulf of Maine, and what we can do to keep it thriving.

Robin:

Why have you spent so much time on Cashes Ledge?

Jon:

Cashes Ledge is a fascinating and wild offshore place that helps us understand how marine ecosystems tick. It is also a unique storehouse of Atlantic marine biodiversity. Cashes Ledge provides an opportunity to understand why biodiversity matters in an ecological sense. Unfortunately, we are losing marine biodiversity in the world’s oceans faster than we can study it.

Currently, I’m trying to figure out how the whole benthic ecosystem out on Cashes Ledge – from the fish, to the kelp forests and the diverse invertebrates communities have changed over the past decades. I’m particularly interested in how resilient the system is to human disturbance and to climate-related changes in the oceanography.

When we studied Cashes Ledge intensively in the 1980’s, it was like a time machine providing a fleeting glimpse of what New England marine coastal communities might have been like hundreds of years ago, when lots of large predatory fish – especially cod,  were commonplace close to shore. We videotaped over 100 cod an hour going by an area of bottom about the size of a large picnic table on Cashes Ledge, compared to no cod seen at the same depth at coastal sites in the Gulf of Maine.

I actually saw a whale cod as long as a diver and schools of Atlantic bluefin tuna while diving on Cashes Ledge then. There have been substantial reductions of predatory fish since then, which is something I’m studying, but Cashes Ledge is still a vitally rich ecosystem compared to coastal ones that have been more heavily impacted by humans.

Robin:

What other kinds of interesting animals have you seen on Cashes Ledge?

Jon:

There are layers of marine life on Cashes Ledge, including minke, right, humpback and pilot whales, blue sharks, basking sharks, atlantic white sided dolphins, big schools of bluefin tuna chasing herring, whale cod, red cod, pollock, wolffish, torpedo rays, squid, strange feather stars called crinoids, and unusual sponges and sea squirts typical of sub arctic areas of Scandinavia.

Robin:

Can you talk about the internal waves and why they are important?

Jon:

The top of the ridge on Cashes Ledge is an incredibly dynamic place – layers of plankton in warmer overlying waters are driven right down to the bottom as much as 20 times a day by these phenomena known as internal waves. This is a big deal because the downwelling plankton layers are pulses of concentrated food that sustain bottom dwelling organisms and, in effect, fuel the food web.

We stumbled across this phenomenon in the course of our scuba dives to the top of the ridge at 30 m. One dive team would go down and report that the water on the bottom was cold and beautifully clear but the next team an hour later found pea soup visibility in greenish warm water. This, of course, turned out to be the plankton layer pushed down onto the bottom like a yo-yo by internal waves.

The temperature increase was so large that we could feel the warm water through our drysuits. At that time, the prevailing view of the subtidal zone was that it was a stable place with nearly constant environmental conditions, compared to the rocky intertidal zone. But out on Cashes we were documenting as much as 5 degree centigrade temperature increases in 10 minutes right on the rocky sea floor at 30 m depth.

Internal waves are like a sine wave travelling along the boundary between the warm surface waters and the colder layer below. They can be huge – spanning 50 m vertically in some parts of the world and 30 m high on Cashes.  I’ve seen these downwelling green water waves approaching the ridge on Cashes Ledge while scuba diving and sitting off the ridge in the Johnson Sea Link submersible – it’s one of the most spectacular things I’ve seen underwater.

Robin:

What makes Cashes Ledge so unique?

Jon:

There are at least three things make Cashes Ledge so unique. First of all, it is the largest continuous kelp forest in offshore waters on the entire east coast of the US. The kelp grow unusually deep there, beyond  30 m depth. The forest and the ledge itself provide many valuable goods and services to keep the offshore Gulf of Maine ecosystem healthy, vibrant, and productive. For example, it’s a nursery habitat for commercially valuable groundfish. It’s also an energy rich food source for marine life living in habitats both on the ledge and far away from it – in the form of detritus as the kelp breaks down.

Secondly, the Cashes Ledge ecosystem contains a wide range of different bottom types – it isn’t just all rocky ledge. Just like on a mountain slope in the Green or White Mountains in New England, there are cobble and boulder fields on the lower sides of rocky slopes on Cashes Ledge. Deeper down, the sea floor is covered in sand and gravel that grades into soft bottom areas of silt and mud in the basins. So what you have in the Cashes Ledge underwater landscape is a representative collection of most of the major types of bottom habitats found in the Gulf of Maine, but in an incredibly compact area, as ecosystems go.

Each of those different habitat types has its own community of species that do especially well in that particular habitat. For example, there are pink northern shrimp, clams, and tube worms living in the muddy basins at the edge of a boulder field, then communities of soccer ball-sized yellow sponges, bright red sea anemones, and little upright calcified candelabras called bryozoans that look like miniature coral reefs, attached to the boulder tops. Different habitats enhance biodiversity overall. If you sum up all the different species living in each of these different types of habitats from kelp forests to the muddy basins, you have some of the highest biodiversity levels in the Gulf of Maine right on Cashes Ledge.

Finally, as an abrupt topographic high in relatively clear, shallow, sunlit waters, Cashes Ledge is an especially productive offshore ecosystem in the Gulf of Maine. I mentioned the role of the kelp detritus exporting food to adjacent ecosystems, but the dynamic oceanography of the ledge itself also contributes to the productivity of the bottom community in the way that internal waves push concentrated layers of plankton to the top of the ridge.

I think both mechanisms help make Cashes Ledge such a productive area for many species – including groundfish and marine mammals. We’ve seen minke whales feeding in the slicks of internal waves on Cashes Ledge, presumably due to high concentrations of food there.

Robin:

What kind of protection does Cashes Ledge need and why?

Jon:

As special as it is, Cashes Ledge is a very vulnerable marine ecosystem. Right now Cashes Ledge has a small amount of protection from certain types of fishing activity as an Essential Fish Habitat and as a Habitat Area of Special Concern. This is laudable and a real achievement by fisheries managers in New England. However, this protection is only temporary and it could be eliminated at any moment.  It could be opened to fishing practices that further deplete stocks of groundfish, damage biodiverse communities, and decrease the sustainability of the kelp forests.

Because it is such a unique, valuable, and diverse New England marine ecosystem, the rocky ridge, adjacent bottom habitats, and the overlying water column on Cashes Ledge need permanent protection from human impacts. It has been shown many times that marine protected areas help exploited stocks recover and can ensure the sustainability of biodiversity and other goods and services that keep our oceans healthy. We also know that really small protected areas don’t do these jobs very well, so it pays in the long run to preserve larger areas containing different types of habitats.

Globally, we aren’t doing a very good job of protecting the oceans as less than 2% of the worlds oceans are fully protected, despite all the scientific findings showing that marine ecosystems are under ever increasing levels of stress from all sorts of human impacts.

New England is as famous for its coastline as for its fish – but what lies beneath New England’s waves goes largely unseen and unremembered. One of these unknown treasures is Cashes Ledge, a 25-mile long underwater mountain range which lies 80 miles off the coasts of Massachusetts, Maine, and New Hampshire and shelters one of the most distinctive marine ecosystems in the Atlantic. But Cashes Ledge is as sensitive to human interference as it is important to ecological diversity. With limited protection against increasingly destructive fishing techniques, Cashes Ledge remains vulnerable.

Atlantic Riches

Cashes Ledge hosts a remarkable diversity of marine life, from the Atlantic wolffish and rare blue sponge to the unusual red cod. The reason for such diversity lies in the mountain range itself, whose pinnacles interrupt the primary Gulf of Maine current and create a stunning oceanographic phenomenon known as internal waves, which carry high levels of nutrients and oxygen from the sea surface to the sea floor. This unusual circulation pattern results in an incredibly productive and diverse ecosystem. Cashes Ledge boasts the deepest cold water kelp forest in the Gulf of Maine and possibly the North Atlantic and has a rich array of invertebrates including sea anemones; bright orange, red, yellow and blue sponges; horse mussels; sea stars; brittle and feather stars; sea squirts; worms and northern shrimp. Atlantic bluefin tuna can be found pursuing herring on Cashes Ledge and blue sharks are common during the warm summer months. Humpback and Northern right whales often stop off to feed on the abundant supply of plankton. Cashes Ledge is also rich in a variety of groundfish including Atlantic cod, white hake, monkfish, haddock and redfish. A variety of offshore sea birds can be found dining at Cashes, such as sooty shearwaters and Wilson’s storm-petrels.

Cashes Ledge is also a rarity in New England waters. Though the ledge’s jagged, rocky formation has protected this particular habitat from significant human interference, other areas in the Gulf of Maine have not been so lucky. Cashes Ledge is unique in the greater Gulf of Maine system because its mountains shield one of the few remaining examples of what an undisturbed and thriving ecosystem in this region could look like. It’s no wonder that scientists have used Cashes Ledge as an oceanographic research lab for decades.

Under Attack

Up until the late 1900s, the rocky seafloor surrounding the Cashes Ledge mountain range prevented fishermen from trawling the ocean floor for their catch. Today, modern fishing gear equipped with “rock-hoppers” is more effective and more destructive, and poses a serious threat to this ecological treasure beneath the waves. Certain species are especially at risk. Bottom trawling could easily wipe out certain populations of sea anemones, and scientists estimate that it would take over 200 years for the population to recover and return to the area. The kelp forests are also prone to shredding from simple fishing gear like lines, hooks, and traps, and bottom trawling could remove entire sections of the kelp forests – requiring years to recover. Any sustained damage to this delicately balanced ecosystem could last for decades or more.

Inadequate Protection

Though a portion of Cashes Ledge is currently protected by the New England Fishery Management Council (NEFMC), this protection is very limited. A part of Cashes Ledge has been designated as a habitat protection area and much of it is currently closed to fishing for cod, haddock and other groundfish. However, Cashes Ledge remains open to fishing with certain kinds of gear such as “mid-water” trawlers, large offshore lobster pots and seine nets that can seriously impact this sensitive ecosystem. Furthermore, the NEFMC is now considering modifications or elimination of these already limited protections – threatening the diversity of ocean wildlife and the unique habitat found on Cashes Ledge and the long-term health of this important and vulnerable ecosystem.

CLF Action

CLF has taken the lead in campaigning for the permanent protection of Cashes Ledge from damaging fishing gear. It is clear to us that the real value of this special place lies in preserving this treasure for ocean wildlife and as an open sea laboratory for the world’s scientists.

CLF is also committed to raising public awareness for Cashes Ledge and other ocean habitats through the recent launch of the New England Ocean Odyssey, featured earlier in this issue. This five-year program is just one of many ways CLF remains dedicated to conserving New England’s oceans.

Protecting Cashes Ledge is more than an environmental obligation – it is an opportunity. Preserving this area of natural beauty offers the chance to create another legacy for New England – one that recognizes its biodiversity and provides a thriving environment for generations to come.

Note: This article was originally pulished in Conservation Matters, CLF’s quarterly publication. Find a copy of this issues, as well as archives, here.