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

Category: Beaver Behavior


Well, you know the old story. Famous nature group wants to do a piece on beavers and talk to our ‘biologist’ but settles for me, and then this famous nature group scurries off to talk to the real players  and then crawls back and asks for some photos. Because they come to the stunning conclusion that ours are better than anyone else’s and document the dramatic changes the beavers make!

Ya ya ya, of course they do. Because in our non-biologist ways we actually watched things and observed the changes. Because scientists are more focused on data and we were more focused on SEEING. Surprised?

Anyway, it looks like we can expect a fun beaver article from the big wigs soon, so I’m happy. Until then we can make do with this nice report from the New York Adirondack.

Beavers: Nature’s Architects and Engineers

Beavers are the great architects of American ponds and streams. The North American beaver competes with the Eurasian beaver to be the 2nd largest rodent in the world, after another semi-aquatic mammal, the South American Capybara.

More than any other mammal, the industrious and hard working beavers have the greatest impact on water bodies, with their tree harvesting, manipulation and dam building. The purpose of dam building is to create lakes or ponds of sufficient depth to allow beavers underwater access to their lodges if and when the water surface freezes in winter, as well as to keep predators like wolves, coyotes, cougars or bears from approaching or breaking into the lodge for access to the beavers.

Beaver ponds naturally produce a huge and beneficial support habitat for everything from invertebrates, fish, crayfish, frogs, newts, snakes and turtles to predators like otters, minks, weasels and bears, as well as osprey, eagles, ducks, geese, etc. so the same factors which seem to make beavers a headache for farmers and land owners, provide a rich biodiversity for the flourishing of a wide range of plants, crustaceans and animals. Beaver ponds act as one of nature’s best filters, removing sediments and pollutants from water, including total suspended solids, total nitrogen, phosphates, carbon and silicates.

Why yes they do! Nice of you to notice. Someday this message will catch on I keep thinking.

They also provide game for hunters and fishermen, and a place to drink for deer and other mammals like moose, who browse the sodium rich water plants, often diving beneath the water surface to access the plants. Car accidents with moose are usually caused by moose coming up onto the road to lick the salt we spray around to melt the ice.

If the aim of trapping beavers is to eliminate them, trapping backfires because the same habitat which attracted the beavers in the first place, will attract other beavers, who will rebuild the dams and infrastructure. This is why beaver deceivers are such a useful invention, as they preserve the beaver’s habitat, and all of its benefits, while preventing too many acres from being absorbed into the beaver’s habitat. Working with the beavers is generally a win-win for all parties.

Yup! And this is the way I wish all beaver stories would end!


There are three fine things to share this morning. The first is that Roland Dumas just posted grand photos of his first beaver sighting in Napa this season and I knew you’d want to share.

Isn’t that splendid? I well remember that after the shut-ins of winter we would start to see our beavers again in april and may. It is very likely that if there are kits they are already born or nearly so. Ahh memories.

The second good thing is that we had lots of fun going through the beaver scrapbooks to scan articles for the grad student and seeing this again, which was just about the most polite and simultaneously provoking thing I ever wrote in my life. I’m so proud.

2020-04-14 14-34

Ahh the basking! But like any good Catholic I saved the best for last. Because guess what Martinez resident I do not know posted Monday on Facebook?

 

This was seen Monday morning around 7 am near Starbucks. I especially got excited by the second image, which shows this is an adult beaver. Not likely a lost disperser, but somebody with a significant other somewhere.

Keep a lookout, Martinez. These are strange days and anything could happen!


We are all feeling a little displaced these days, so this video from British Columbia should come as no surprise. It’s being touted as an effect of empty cities but of course we know it’s the effect of APRIL and the need to disperse. I sure hope those empty streets help the beaver safely find water soon.

[wonderplugin_video videotype=”mp4″ mp4=”https://i.rmbl.ws/s8/2/l/g/t/6/lgt6a.caa.1.mp4?b=0&u=8t6f” webm=”” poster=”” lightbox=0 lightboxsize=1 lightboxwidth=960 lightboxheight=540 autoopen=0 autoopendelay=0 autoclose=0 lightboxtitle=”” lightboxgroup=”” lightboxshownavigation=0 showimage=”” lightboxoptions=”” videowidth=600 videoheight=400 keepaspectratio=1 autoplay=0 loop=0 videocss=”position:relative;display:block;background-color:#000;overflow:hidden;max-width:100%;margin:0 auto;” playbutton=”https://www.martinezbeavers.org/wordpress/wp-content/plugins/wonderplugin-video-embed/engine/playvideo-64-64-0.png”]

The Campbell river flows through Vancouver island and into the straiht of Georgia beside which this store is located. The strait is pure Pacific ocean with high waves, salty water and resident orcas so you can imagine for yourself why this parking lot looks like a much better deal to our young friend. The store is about 100 miles up the strait from Nanaimo Island which we’ve talked about a lot and these happy beavers were lovingly filmed.

[wonderplugin_video iframe=”https://youtu.be/Yo_gZ54gHBI” lightbox=0 lightboxsize=1 lightboxwidth=960 lightboxheight=540 autoopen=0 autoopendelay=0 autoclose=0 lightboxtitle=”” lightboxgroup=”” lightboxshownavigation=0 showimage=”” lightboxoptions=”” videowidth=600 videoheight=400 keepaspectratio=1 autoplay=0 loop=0 videocss=”position:relative;display:block;background-color:#000;overflow:hidden;max-width:100%;margin:0 auto;” playbutton=”https://www.martinezbeavers.org/wordpress/wp-content/plugins/wonderplugin-video-embed/engine/playvideo-64-64-0.png”]

The whole region is drop dead gorgeous. It’s about 175 miles north of Judy and Jim Atkinson in Port Moody. If I were planning  an early fall ferry trip any time soon, I would head that direction.

[wonderplugin_video iframe=”https://youtu.be/tOZecNYtmZQ” lightbox=0 lightboxsize=1 lightboxwidth=960 lightboxheight=540 autoopen=0 autoopendelay=0 autoclose=0 lightboxtitle=”” lightboxgroup=”” lightboxshownavigation=0 showimage=”” lightboxoptions=”” videowidth=600 videoheight=400 keepaspectratio=1 autoplay=0 loop=0 videocss=”position:relative;display:block;background-color:#000;overflow:hidden;max-width:100%;margin:0 auto;” playbutton=”https://www.martinezbeavers.org/wordpress/wp-content/plugins/wonderplugin-video-embed/engine/playvideo-64-64-0.png”]


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.

DONATE

TREE PROTECTION

BAY AREA PODCAST

Our story told around the county

Beaver Interactive: Click to view

LASSIE INVENTS BDA

URBAN BEAVERS

LASSIE AND BEAVERS

Ten Years

The Beaver Cheat Sheet

Restoration

RANGER RICK

Ranger rick

The meeting that started it all

Past Reports

November 2024
M T W T F S S
 123
45678910
11121314151617
18192021222324
252627282930  

Story By Year

close

Share the beaver gospel!