Because the beaver isn't just an animal; it's an ecosystem!

Category: Beavers and climate change


I think we should start our day with a little beaver listen from Yale. Can’t embed it but this is close.
Don’t you feel 90 seconds smarter? I sure do. Today is the day that Kevin Swift of OAEC will be installing a flow device in that beaver habitat behind the stream in Sonoma we talked about a while ago. Yeah for flow device! Not quite a yeah for the timing, as it is smack dab in the middle of kit bearing. I gave my usual alarm bell but others were less concerned. Fingers crossed the beavers won’t be either.

Meanwhile there’s more beaver and climate new from our favorite science friend

Dramatic loss of food plants for insects

“Over the past 100 years, there has been a general decline in food plants for all kinds of insects in the canton of Zurich,” says Dr. Stefan Abrahamczyk from the Nees Institute for Biodiversity of Plants at the University of Bonn. The homogenization of the originally diverse landscape has resulted in the disappearance of many habitats, especially the wetlands, which have shrunk by around 90 percent. Human settlements have spread more and more at the expense of cultivated land, and the general intensification of pasture and arable farming has led to a widespread depletion of meadows and arable habitats. The researchers compared the abundance of food plants of different insect groups, based on current mapping for the years 2012 to 2017, with data-based estimates from the years 1900 to 1930 in the canton of Zurich (Switzerland).

The of specialized groups of flower visitors are particularly affected by the decline. For instance, the Greater Knapweed (Centaurea scabiosa) is pollinated by bumblebees, bees and butterflies, as their tongues are long enough to reach the nectar. The decline is particularly dramatic for plant species that can only be pollinated by a single group of insects. In the case of Aconite (Aconitum napellus), for example, this can only be done by bumblebees because the plant’s toxin evidently does not affect them.

Gosh those darn disappearing wetlands! If only there were some kind of cheap and easy way to make wetlands all over Europe and North America so that the essential insect population could be saved.


Beaver bright spots don’t often come from Virginia. Admittedly there are a few true believers there, and that one awesome paper from Stephanie Boyles but in general it is not the best place in the world to be a beaver.

Ryan Bradley’s nice long article might change all that. I’m not sure I understand the timing, since he mentions Rachel Poliquin’s book and quotes Frances Backhouse but not Ben Goldfarb. But it’s a wonderful read. Here are some highlights but go check out the whole thing.

What the Beaver Can Teach Us About Innovative Conservation

The next morning, after my drive up the mountain, at the Mineral Lodge Restaurant, I met Kristen Wilson, an ecologist at the Nature Conservancy and one of the overseers of the BDA project. Soon we’d be heading out to Child’s Meadow to see the beaver dams she was looking after. Over breakfast, she outlined the broader implications of the project. What I had to understand, Wilson said, was that something seemingly as simple as a small dam constructed out of woven willow branches, blocking up a thin creek, was not quite so simple.

The dam was meant to perform several tasks. A few of these, such as habitat restoration and water retention, were fairly obvious. But one of the most important things the dam would be doing was trapping carbon in the murky, silty, slow river bottom behind it. This task—carbon capture—was what paid for the dam’s existence. The BDA pilot project in Child’s Meadow had received the bulk of its funding via California’s cap-and-trade program, which in 2018 paid out $1.4 billion to fund a huge range of projects, everything from rebates for buying environmentally friendly cars and buses, or for solar panels, to grants for planting trees in urban areas, to simply buying up land to preserve and restore it.

The BDAs were, Wilson explained, a newer and cheaper form of meadow restoration. The usual process of restoring a wetland in a meadow was simple construction: dig a pond, plug up the downstream end, watch the water fill it in. Pond-and-plug, it’s called. Of course, this requires some big machinery, but using big machines—engineering our environment—is something we are good at, and it results in a picture-perfect mountain meadow with a pond at its center. One problem with pond-and-plug is that it is expensive, easily four or five times the cost of BDAs, if not more.

Ryan is vising the site of that series of BDA’s that won the coveted grant money in 2018 for climate change projects. BDA’s capture carbon. That’s the whole point. All the other good things they do for fish and wildlife is just an added bonus.

Farther down the creek was a strand of dead trees. I asked Wilson what was going on down there and she told me that’s where the real chaos was, because a family of beavers lived there. We walked down toward the dead trees and, as we neared, Wilson and I spotted a woman hunched over a section of creek bank, staring intently at the water. The creek here was indeed chaotic. The beavers had dug channels, as they do, to avoid awkward passage over land. The waterways cleaved the landscape into jigsaw-puzzle pieces. It was easier just to stick to the waterways, rather than chance it on land and trip into an unseen channel.

The woman, Wilson whispered to me, was Karen Pope, a wildlife biologist who studies frogs. Specifically, the Cascades frog, a very endangered species that lives precisely within the beaver-induced chaos. We watched her watching the river, hunting for a frog, until she stood up, noticed us, and beckoned us over. She and Wilson immediately got down to it. Wilson wanted to know what Pope thought about the sections of dam that had blown out, where the water was coming over and the dam was no longer doing what we think a dam is supposed to do.

Pope pointed downriver slightly from one such damaged section, to where a small bite had formed from the flow of water hitting the bank and scooping away at its side, creating a still little pool. “That’s where the frogs breed, right there,” Pope said. “And here—in these little channels the beavers create, that’s perfect frog habitat too. This frog is tied completely to this environment.”

There were many such species. A bird called the willow flycatcher, also endangered, hunts in the beavers’ ponds and nests in the beavers’ willows. There were insects and muskrats, fish and waterfowl, and anything that needs an excess of water in an often dry landscape. It struck me then, as Wilson described species after species that benefits from beaver engineering, that the lesson of the human-built beaver dams, and of being more beaver-like generally, was one of deconstruction.

That is, instead of our built landscape existing as a way to live apart from nature, of keeping it at our doorstep, we should accept the fact that nature is inescapable. The whole climate is changing, and large swaths of the globe are becoming inimical to human life. Nature is a problem we can’t engineer our way out of. But, like the beavers, we might engineer our way back into it.

Isn’t that nice!  Yup there’s a lot more than sequestration on a beaver’s resume! I like to come across the passage as if by surprise in any article. It took Ryan a page and a half to get there. But that’s okay. He’s there now.

The whole of nature—which is to say, all of the world—is like the beaver’s patchwork quilt: dynamic, changing, chaotic. Beaver dam analogs and their champions often find themselves in uneasy coexistence with regulatory agencies responsible for keeping rivers manageable and controlled. The very purpose of a BDA is to add a bit less control—a bit of untidiness—to the river. The dams help the river burst its banks, begin to meander, and reenter the old floodplains. But then, it’s often a flood-control agency rubber-stamping such projects, and these agencies are inherently skeptical of introducing an object meant to bring about the very thing—a flood—they have been tasked with preventing.

“People are really attached to stasis. It’s the unfortunate result of human nature,” is how Kate Lundquist explained the resistance to BDAs. Lundquist is a director at the Water Institute at the Occidental Arts & Ecology Center in Sonoma, California. She and her colleague Brock Dolman describe themselves as being part of “the whole beaver dam analog movement,” which is also a movement toward what’s known as process-based restoration. The idea behind process based restoration is both simple and radical. Rather than reconstructing an ecosystem based on our ideas of how that ecosystem appears, to us, why not try to kickstart some of the primary drivers of that ecosystem and let nature take it from there?

Yes, it’s true. We like things to be the way we left them. We like our creeks in straight predictable lines and we don’t like them to jump their banks. And beavers change all that. It’s what they do. Change is every beavers middle name.

Dolman mentioned a place where the kind of regenerative disturbance and process-based restoration he and Lundquist were talking about had accomplished some extraordinary transformations in a very short amount of time. About three years earlier, some BDAs had been placed in a small creek outside of Lincoln, California, just north of Sacramento. It was hot, dry, brush-filled rangeland that had, a long time ago, been marshy floodplain pockmarked with beaver ponds. Gold miners came in, dynamited the creek, and named it Doty Ravine. It had been tamed ever since. But in just a few years, Dolman said, “a very large chunk of land has been turned back into an insane beaver habitat.” The place was, he told me, like going back in time to a prehistoric, practically prehuman landscape.

Damion Ciotti is a rangy man who speaks with the quiet enthusiasm of someone prone to spending long bouts outside the office whenever possible. Ciotti was driving a pickup through winding roads in the Sierra foothills, out toward Doty, while telling me about his early experiences in hydrology, when he really began learning a river. Ciotti is a restoration specialist at US Fish and Wildlife and is the reason there are BDAs in Doty. When he was in graduate school in Oregon, and becoming obsessed with fly-fishing, he’d skip class and hit the river, watching it very closely for hours—all day, more or less. That’s where he learned how to watch moving water.

Nice to see Damion in an article. He’s usually a quiet behind the scenes mover and shaker. It’s also nice to read about ANY GOOD BEAVER PROJECT IN PLACER COUNTY the trapping capital of the state. In fact I think Lincoln was the site of the most beaver permits issued for trapping. Ahh memories!

He hoped it had somehow managed to spawn, as the new wetlands made for perfect salmon hatcheries. Salmon, frogs, birds, and a seed bank for native aquatic plants—the beaver-built wetlands were nutrient-rich nurseries for all sorts of critters. And the cows, even though they didn’t have much to graze, seemed to enjoy hanging out near the water’s edge too. It certainly was cooler down there in the summertime.

We reached a locked fence by the side of the road and Ciotti pulled up to it, jumped out, unlocked it, and drove us onto the rangeland property. In the distance stood a strand of cottonwoods. This was where the wetlands began. Ciotti parked on a bluff above the strand and we quietly put on waders to trudge through the sludgy muck. In the silence, I noticed the air was alive with birdsong, coming from the cottonwoods, willows, rushes, still waters, a ringing that emanated from this oasis. We dropped down into it and the birdsong grew near cacophonous.

I love to think about the transformations beavers bring, both to the landscape they alter and to people lives who cherish them. There are rewards we all expect to see. But there are others, that we could never have imagined.

I asked Ciotti what had been the biggest surprise about the whole project, expecting him to say something about the extraordinarily low cost. “It’s the beavers, they did something so monumental. This, all this, was oak savannah. Now, in three years, this is the largest connected wetland in the whole Sierra foothills. These aren’t especially big creatures, they’re not burning a crazy amount of calories, and just look at all this!”

I thought, then, of the final words from the woman-turned-beaver in the Haida legend: “We have returned to our home in the water.” The story seems to be less Agreedabout how beavers are like us, and more about how we might become like them.

Agreed.


“Before I will see the worst of you all
To come into danger of death or a thrall,
This hand and this life I will venture so free”:
Was not this a brave bonny lass, Mary Ambree?

Well, sure I didn’t exactly storm the castle but I did okay and told the story well enough to earn some praise.It’s odd presenting remotely because I couldn’t hear the audience, although I am told there was one. Usually I hear laughter or ‘ahs’ in the right places and know how things are going, but with this I heard nothing until the questions at the end!

The fun part was being on the phone with Michael Pollock who, in addition to being friendly and brilliant, is also at GROUND ZERO for Covid-19 and dealing with a pretty unbelievable work environment at the moment. I guess if you work for the federal government right now your job is to NOT get the disease and also, ironically, not appear to be concerned about it either.

His presentation started on the evolving history of rivers and how much beavers were a part of that and how plants/trees depended on their work for nutrient regeneration etc – and had basically ‘trained them‘ with evolution to do what they do. (What an interesting thought!) Then he transitioned to talk about the work they are currently doing in the Scott’s Valley with BDA’s.

He also talked about how he hears over and over and over and over about beaver dams blocking salmon (which he knows they don’t) and they constructed a study to address this directly using a pit tags to track the moments of salmon they released specifically in a controlled dam to monitor the movements. They repeated it for steelhead and the paper found everyone could negotiate the dam. It is still in review but is going to be published soon and everyone was happy about that.

Anyway, he also said, alarmingly, that the California salmon population is “Tanking” and that the numbers are down to a few thousands. This was really shocking to hear, and made me think about all the obstacles we are giving them and all the beavers we are taking away. It also means it’s as good a time as any to talk about this which was published recently in Earth Island.

How Much Longer Will Wild Coho Hang on in the Golden State?

“Usually between here and the road there’s a half dozen redds or more,” says Todd Steiner, pointing 100 feet or so downstream to where Sir Francis Drake Boulevard passes over the confluence of Lagunitas Creek and San Geronimo Creek, near the town of Lagunitas. But only two ribbons hang from the trees. That’s been the typical story for this year’s coho salmon run throughout the Lagunitas Creek Watershed. Even for a wild salmon population that’s been listed as endangered since 1996, this year’s spawning survey came up with significantly low numbers.

This current year is one of the lowest numbers we’ve seen,” says Steiner, who is the executive director of the conservation group Turtle Island Restoration Network.

Marin has been talking about this issue for a while and arguing among itself about whether to reintroduce beavers. Are we going to keep arguing until the entire salmon population is gone?

Historically, anywhere from 5,000 to 10,000 adult coho created more than 2,600 redds in this watershed each year. According to NOAA’s recovery plan for the federally endangered Central California Coast population of coho salmon, Lagunitas Creek and its tributaries now have the capacity to hold 1,300 redds. This takes into account that half of the salmon habitat in this river system has been blocked or submerged by reservoirs that hold the water supply for the quarter-million people who live in Marin.

On average, Steiner and his team count 250 redds annually, but that number has been steadily decreasing. This year, there were less than 50 redds.

Fewer salmon eggs mean fewer salmon period. Or no salmon. Has California even considered that? We are still planning on a salmon season this year. But our time is running out. Its long past time for drastic measures.

For the past few years, SPAWN has worked closely with the National Park Service to rewild these two communities on federal land. In what was once Tocaloma, where SPAWN has made its headquarters, Brown points out where creekside retaining walls and structures have been replaced by restored floodplain. With help from volunteers, SPAWN placed fallen logs in the creek and built overhanging banks with straw logs to encourage logjams and side channels with slower water. Native grasses and willows from an onsite plant nursery have taken root in the riparian area, their shoots poking through a biodegradable erosion control fabric.

“It’s like a beaver pond,” Brown says. “It’s backwater habitat that’s quiet, complex, and deep.”

Of course, emulating beavers on just a few sections of the watershed goes only so far and, as Steiner says, won’t be enough to restore endangered salmon to NOAA’s goal of 1,300 redds. “At the same time that we’re repairing the land-use mistakes of the past, we’re repeating them,” he says.

Hey you know what ELSE IS LIKE A BEAVER POND????? A frickin’ BEAVER POND!!!

What on earth are we doing allowing any beavers in California to be killed when we know full well what an important role they play for salmon and how dire the situation is? Our salmon population is beyond dwindled and its like we’re killing off the few heroes that can help it.

Imagine if we were preventing firemen from moving in to a community because they took up too much space and blocked development. Do we need them any less? Our bad decisions are going to make us go up in flames and the only ones who could have helped we made sure were gone.

Hmm, that’s depressing. Have a nice beaver video as comfort, Courtesy of the Norwegian Beaver Project.


You read that right. The REAL NASA is studying beaver habitat. Not that crazy rocket building flat-earther who killed himself trying to prove the earth wasn’t round. Scientists who know better.

Be on the Beaver Lookout

Mass Audubon and the Boston NASA DEVELOP National Program team are collaborating to learn more about how Massachusetts beavers impact the landscape using satellite imagery, and we need your help.

The NASA DEVELOP National Program addresses environmental and public policy issues through interdisciplinary research projects, applying NASA Earth observations to community concerns around the globe. Teams of DEVELOP participants partner with decision-makers to conduct 10-week rapid feasibility projects, highlighting relevant applications of NASA Earth observing missions, cultivating advanced skills, and increasing understanding and use of NASA Earth science data and technology. The DEVELOP Program conducts 55-65 projects annually across 11 national locations. This spring, the DEVELOP Boston team is partnering with Mass Audubon to explore how beavers influence the Massachusetts landscape.

Wow! Astrobeavers! Science thinks beavers are important enough to study from space! I’m so excited! Do you think beavers will know they’re being watched and start showing off?

Beavers are known as ecological engineers. They alter and create new habitats by building dams from sticks and mud to create still, deep ponds. These ponds provide beavers with access to food, protection from land predators, and shelter.

By building dams and creating ponds, beavers restore lost wetlands, of which about half have disappeared in the lower 48 states since European settlement. Beaver ponds are home to rich biodiversity, including amphibians, reptiles, spawning fish, muskrats, bats, various birds, and a wide variety of plants.

Altering the hydrology helps control downstream flooding, improve water quality, trap silt, and resupply groundwater. When the dam is abandoned and the pond drains, nutrient-rich silt creates highly productive meadows. However, beaver dams may cause unwanted flooding to neighboring properties, but can be mitigated through various solutions.

Whoa. So you mean NASA has this written down somewhere? A grant application or thesis statement. This is actually OFFICAL NASA DATA NOW? I need to sit down.

The spring 2020 Boston NASA DEVELOP team is using NASA satellite imagery to find and track beaver flooding events across Massachusetts to see how their populations are impacting landscapes. The team will be corroborating potential beaver flooding using iNaturalist beaver observations. iNaturalist is an online citizen science platform, where users upload and identify species observations (images or audio recordings).

How You Can Help

Help Mass Audubon and the NASA DEVELOP team by reporting beaver signs, including dams, lodges, chewed logs, or beaver themselves using iNaturalist, either in our sanctuaries or anywhere across Massachusetts.

Ahh sadly when I look up the study on NASA DEVELOP it looks more like they’re looking to find all the PROBLEMS beavers cause with their dam building flooding ways. Sigh. Someday we’ll get there. I know it.

MA: Massachusetts –Boston(Boston, MA)Western Massachusetts Water Resources: Using the Landsat Series to Assess Flood Events Resulting from North American Beaver Reintroduction to Inform Biodiversity and Infrastructure Managemen


Folks are starting to wake up to the unexpected effects of climate change. Like a the effect a 1.5 celsius rise could have on evapotranspiration all across the United States. Not just in the west where we’re used to it.

As groundwater depletes, arid American West is moving east

“We asked what would the response look like if we included the entire complexity of subsurface water movement in a large-scale simulation, and we think this is the first time this has been done,” said Condon, lead author of the paper and assistant professor of hydrology and atmospheric sciences at the University of Arizona.

The results, published today in Nature Communications, show that as temperatures shift the balance between water supply and demand, shallow storage can buffer plant —but only where shallow groundwater connections are present, and not indefinitely. As warming persists, that storage can be depleted—at the expense of vital connections between surface water, such as rivers, streams and underground.

Excessive pumping from groundwater that feeds rivers, like the Ganges River (shown), is harming river ecosystems around the world.

The calculations revealed a direct response of shallow groundwater storage to warming that demonstrates the strong and early effect that even low to moderate warming may have on groundwater storage and evapotranspiration.

“Even with a 1.5 degrees Celsius warming case, we’re likely to lose a lot of groundwater,” said Reed Maxwell, professor of hydrology at the Colorado School of Mines, who co-authored the paper with Laura Condon of the University of Arizona and Adam Atchley of Los Alamos National Laboratory. “The East Coast could start looking like the West Coast from a water standpoint. That’s going to be a real challenge.”

Gosh if ONLY there were some kind of animal that was driven day and night to make and maintain little dams that would recharge the water table everywhere across the United States. But what are the odds of that happening? I ask you.

Well just because you have a graphic for it doesn’t mean its true. I’m sure there’s a whole division of the EPA devoted to making graphics to promote fake ideas. Like Climate change.

In the western U.S., changes in groundwater storage may remain masked for a long time, the study revealed, because the groundwater there is already deep, and dropping levels would not have as great an effect on surface waters. Additionally, the region’s vegetation is already largely water limited and adapted to being disconnected from deep groundwater sources.

However, the eastern U.S. will be much more sensitive to a lowering of the water table. Groundwater and are more closely linked, and depleting the groundwater will be more disruptive to vegetation, streams and rivers. Many of the systems that have been put in place in the western U.S. for handling and managing water shortage are lacking in the eastern part of the country, as well.

The study revealed that regions in the eastern U.S. may reach a tipping point sooner rather than later, when vegetation starts to lose access to shallow groundwater as storage is depleted with warming.

“We are facing a crisis in global groundwater storage,” Condon said. “Huge groundwater reservoirs are drying up at an alarming rate, and that’s a problem because they nourish major growing regions around the world.”

You can’t just wake up every day and keep saying over and over the problems we are facing could be helped by letting more beavers do the jobs they want to do. It just can’t be that simple. You sound like a crackpot. No one is going to believe you.

 

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