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

Month: July 2022


I think I must have stepped into a time machine or touched some kind of temporal portal without realizing it. My own personal Outlander without the handsome scotsman. Haven’t I done this before? Is this 2022 or 2008 stuck on some kind of loop reel and playing over and over. Yesterday I was over the MOON about the little beaver in pleasant hill. Seeing new life spring into what is such a grim space and being able to start the beaver story all over again. Writing the media and all my photographer friends.

And then I found out about the Grayson Creek Desilting project of 2023 and I felt like I had entered a mobius strip of beavers.

As you may or may not know Grayson Creek was the reinvention of the 1960s army corps of engineers who said there as they did all over Contra Costa – hey, that crazy creek doesn’t NEED to bend all over and take up so much space. We can straighten it and move it into the right spaces that will leave lots more room for building houses and parking lots. Tadaaa!!! The new and improved Grayson Creek! And all we have to do ever few years is bring in some bulldozers and pull out all the sediment we allowed to accumulate and we’ll be as good as new!

Now maybe you have a long memory and maybe you remember the Alhambra watershed project in 2008 that decided that once we saved the beavers they needed to rip out all the soil around their new dam as part of a sediment removal project that had been in the works for years. The plan was to take out all the trees near the secondary dam and just bulldoze away all the accumulated mud.

Well that’s what’s on the menu for the grayson creek beavers. All the way from Chilpancingo to Imhoff and all the beavers in between.

There is approximately 2 to 7 feet of sediment to be removed on each of the sediment bars contributing to about 172,300 cubic yards (cy); 129,800 cy from Walnut Creek and 42,500 cy from Grayson Creek. The sediment removal activities will take place within District right-of-way.

And you might be thinking, hey that’s lot of sediment to be removed. 2 two seven feet for a mile of creek hauled away in dump trucks over a two year period.

Work is proposed to occur from April to October of two consecutive years expected to start in 2023 such that only one side of the channel is desilted each year minimizing impacts to the ESAs. The contractor is anticipated to work sequentially on the channels, desilting each of them separately, with a single crew using all the equipment to complete work on one side before proceeding with the next. The estimated duration of Project work is a total of 192 days spent over two seasons (96 days per season).

Can you imagine what the water is going to look like? Desilting one side at a time? I believe the words OH PUZEEZE are in order. Never mind that if the creek had enough beavers it wouldn’t NEED a desilting projet. The friends of pleasant hill creeks wrote me about this yesterday and said that the EIR has already been completed and no beavers were seen at the time. Comments needed to be submitted ASAP and would Worth A Dam be willing to sign on to their comments because we might carry some more weight.

To which I said, isn’t this where I came in?????

Three sensitive or locally rare mammal species were determined to have the potential to occur within the Project area: pallid bat (Antrozous pallidus), western red bat (Lasiurus blossevillii), and hoary bat (Lasiurus cinereus).

As to any other mammal species in the area we neither know nor care.


Do you all hear that whirring draining sucking sound all around us? It’s the noise of the tide finally turning. We knew it would happen. But mark July 25th in your calendars. It will all be easier after this. Remember that.

Op-Ed: Want to fight climate change and drought at the same time? Bring back beavers

Millions of highly skilled environmental engineers stand ready to make our continent more resilient to climate change. They restore wetlands that absorb carbon, store water, filter pollution and clean and cool waters for salmon and trout. They are recognized around the world for helping to reduce wildfire risk. Scientists have valued their environmental services at close to $179,000 per square mile annually.

And they work for free.

Our ally in mitigating and adapting to climate change across the West could be a paddle-tailed rodent: the North American beaver.

Oh My GOODNESS! I’m so excited. I’m sitting in the front row so eager for the state of California to read this article I can’t see strait.

There’s a strong consensus among scientists and environmental managers on the benefits of working with beavers to protect our natural environments. Beavers can help us continue to live on, work with and enjoy our Western landscape. As ecosystem engineers, they build dams and dig canals to escape predators. Their manipulation of plants for food and building materials produces wide-ranging environmental gains.

Yet despite beavers’ ecosystem benefits, we have long pushed them out of their homes. When the European-American fur trade killed hundreds of millions of beavers, it destroyed the engine that built and maintained North American wetlands. California alone has lost an estimated 90% of its wetland area. Humans continue to tear down beavers’ dams and lodges when they get in our way.

Rather than chase beavers off, it is time to invite them back.

Watershed scientists and state and federal land managers can identify the thousands of streams most suited to beavers. Simple steps can help bring them to watersheds in need — whether that means helping restore river environments to attract dispersing juvenile beavers from existing nearby populations, or reintroducing beavers to locations where they had thrived before the fur trade and habitat degradation destroyed them as well as their homes.

I think it’s kind of odd to suggest we are just telling them to “move along, we don’t need your kind around here” instead of directly stating that we are in fact KILLING them and throwing their treasures down to toilet because it would require an ounce of effort to manage their behavior.

But that’s just me.

Beavers can then set in motion protective natural processes. Their dams and canals slow the flow of streams and rivers, spreading water across the floodplain. Once slowed, the water loses its ability to carry sand, silt and gravel, so these materials accumulate. The wet ground and regular sediment deposits make fertile conditions for vegetation that has evolved with beavers and is more productive when regularly chewed. All of this builds and maintains wetlands.

This nature-based restoration can in turn help stave off the worst effects of climate change that are warming streams, deepening droughts and fueling wildfires. These threats harm native fish and wildlife in our communities while draining billions of dollars from our economies.

Riverine wetlands rebuilt by beavers can counteract rising temperatures, nourishing vegetation that stores carbon and benefiting sensitive species including steelhead trout. Spreading water across the floodplain creates a network of firebreaks — gaps in combustible vegetation that can stop or slow wildfires. And beaver wetlands help combat drought because their dams raise water levels so the ground stores water like a sponge, percolating out in drier seasons, which keeps streams flowing instead of going dry.

As part of a team of state, federal and university researchers, we tested the capacity of beavers along an eastern Oregon creek so eroded from years of poor management that the water ran many feet below the surrounding terrain. The erosion led to dried-out floodplains, dead stream-side vegetation and a self-sustaining cycle of drying and degradation in the channel.

Well now this is definitely going to piss off the folks in San Diego that are sure beavers aren’t native and destructive to the endangered magic arroyo toad. I hope they have an extra cup of coffee this morning.

Fixing the creek would require slowing that water down, piling it up to reconnect the channel to its floodplain. This would be a big ask for beavers on their own, so we helped. We hand-built structures to mimic beaver dams to begin slowing and spreading the flow.

This work attracted the first beavers from other environments. In just a few years, more beavers found the spot and assumed the maintenance. Building on our initial efforts, they transformed logs, mud and sticks into structures that spanned the valley and spread the water across many small branching channels, canals and ponds. Willows and other stream-side vegetation emerged. Water soaked the ground in storage that gradually filtered back out, offsetting dry spells.

Stream-side communities might worry that letting a wild dam builder loose might spur flooding that could damage property. But beavers are creatures of habit, meaning we can predict which locations have the lowest potential for human conflicts and greatest potential for environmental benefits. We can entice beavers to remote areas such as millions of acres of national forest and other federal and state lands. And we have tools to prevent beavers’ work from damaging property, such as devices that keep beaver ponds at safe levels, fencing or paint to protect trees and screening to ensure drainage systems are not plugged.

The work is also relatively cheap. The main costs of beaver-based stream restoration involve helping them get a foothold by starting restoration work ourselves and, where necessary, transporting beavers to the right natural site. This approach typically costs thousands of dollars per mile, not the millions per mile we often spend on infrastructure   solutions.

Well that will turn some heads. BDAs are like crack or meth to these folks. Your first hits free. They aren’t excited yet about the actual B’S but that will come. We hope.

This solution also requires not destroying our population of environmental heroes. Last year alone, approximately 25,000 beavers were killed by wildlife control officers in response to people’s complaints and requests to protect their property. Imagine the value to communities of promoting nonlethal options instead, such as adapting the environment for coexistence with beavers or, when that’s not an option, moving them to less conflict-prone locations.

The job is enormous, but so is the capacity of beavers to help. Modest funding for beaver restoration was added to California’s budget this year. Groups that protect wildlife, fisheries and wetlands should join forces across the West to make beavers integral to a coordinated climate change response.

That’s a weird statistic to share. Why not focus on beaver deaths in California specifically? We know how many permission slips were handed to kill beavers in the golden state. Why not report that number maybe even specifying how many in the bottom half of California?

Still. Still WONDERFUL to have an OpEd in the LA Times and wonderful to think of all the eyes it will be read by. At a certain point this is going to make sense to people. And we’re going to get to stop clearing the path with a machete through the back country.

Remember July 25th.

Oh and what a great day to share this video that Cheryl caught of our new beaver friends in Pleasant Hill. Which is suddenly looking a whole lot more pleasant to me.


Do you remember back  before the festival when Elizabeth Winstead wrote that excellent article for Golden Gate Audubon about the Laurel Creek beavers in Fairfield? Well folks were SO excited about this that they wanted a field trip so this weekend Elizabeth and Virginia Holsworth teamed up and gave them the morning they never had before.

Look at these photos and you’ll understand why Audubon matters so much to beavers. Great work ladies!

 


Good lord. It’s BEAVERTOP{A our there. Such good news to support. A fantastic article about beavers on Vox of all places which means literally everybody is talking about it and I have  all kinds of civilians sending me the article and asking me if I knew? Then a friend of the Martinez beavers wrote about a potential dam she’s been watching on Grayson creek behind Target in Pleasant Hill  and I got some buddies to check it out. This pholo is from Bill Feil who ran the nonprofit Lands for Urban Wildlife we were under when Worth A Dam first started. Check it out.

The woman who told me about it was happy when I agreed it was a dam and went back that evening and met another couple who’s been watching it for 2 months and said they’d seen TWO beavers at work on the dam before and saw them come out of a hole in the bank.  She said her son worked for Wild Birds Unlimited and they have always kept an eye on that creek, I’ll keep you posted as I learn more about our new beaver neighbors.

Beavers are heat wave heroes

During an intense heat wave, humans have a number of tools to stay cool, such as air conditioning, swimming pools, and ice cream. Wild animals, meanwhile, have beavers.

Yes, beavers. These web-footed, fat-tailed amphibious rodents help countless other critters survive a heat wave. They not only drench certain landscapes in cold water but also help cool the air. They even make forests and grasslands less likely to burn.

This is especially important right now. In the last two weeks, an oppressive heat wave has been roasting much of the US and Europe, putting both humans and wildlife at risk. The UK saw its hottest day on record. Temperatures in parts of Oklahoma and Texas hit 115 degrees. And there are still two months of summer left.

The fact that most people know about beavers is that they build dams. But these structures are more than just a pile of sticks laid in a stream. They’re hydrological wonders.

Dams form ponds, widen rivers, and create wetlands, building all kinds of aquatic habitats that many other animals like birds and frogs rely on. That’s why beavers are often called ecosystem engineers.

Oh boy. Really really good news for beavers.I’m rubbing my hands together eagerly, which makes typing very difficult as you can imagine., Its worth it,

More than just spreading water around, however, beavers also help cool it down.

Dams can deepen streams, and deeper layers of water tend to be cooler. As streams run into these structures, they can start to dig into the river bed, according to Emily Fairfax, an expert in ecology and hydrology at California State University Channel Islands. So there can be, say, a six-foot-deep pool behind a three-foot-high beaver dam, she said.

Dams also help force cold groundwater to the surface. Made of sticks, leaves, and mud, dams block water as it rushes downstream, forcing some of it to travel underground, where it mixes with chillier groundwater before resurfacing.

“That is really important for a lot of temperature-sensitive species like salmon and trout,” Fairfax says.I aIn one recent study, scientists relocated 69 beavers to a river basin in northwestern Washington state, and found that, on average, their dams cooled the streams by more than 4 degrees Fahrenheit (2.3 Celsius) during certain times of the year. Another study, published in 2017, saw similarly large drops in temperature after beavers built dams.

Are you super excited yet? I am. Send this to all your uncles who like to fish and your friends who can’t be bothered,

Remarkably, beavers can also help chill the air.

“If you’re standing near a beaver meadow, pretty much anywhere, it’s going to be way cooler,” said Christine Hatch, an extension associate professor at the University of Massachusetts Amherst.

As all that water in a beaver habitat starts to evaporate, the air cools down. That’s because turning water into vapor requires energy, and some of that energy comes from the heat in the air, Fairfax said. (This is how swamp coolers, or evaporative coolers, work; it’s also the same reason sweating cools the body down.)

“It’s like an AC system sitting out there in the landscape, keeping the air temperature, you know, 10 or 15 degrees cooler — which can make a big difference,” Fairfax said.

We gave screwed up our planet so badly and have so little will to fix it that at this point we are shrugging and saying, sure maybe the rodents can help. Give it a shot.

By inundating land with water, beavers can also create fire breaks

Intense heat waves can also fuel other problems like droughts and wildfires.

Beavers, again, can help.

There’s one obvious benefit that comes from beaver dams flooding the landscape with water: Wet things don’t burn as easily. “The plants are effectively irrigated year-round,” said Fairfax, who led a study published in 2020 that showed that areas full of beaver dams are “relatively unaffected by wildfire,” compared to similar but dam-less habitats.

LOVE LOVE LOVE THIS.

“Beaver damming plays a significant role in protecting riparian [i.e., river-adjacent] vegetation during wildfires,” Fairfax and her co-author wrote in the study, titled “Smokey the Beaver.”

During wildfires, areas with beaver dams essentially can function as “a refuge for absolutely every critter that can get in there,” Hatch said.

And it’s not just fires. Beavers also provide insurance against droughts, by helping replenish the groundwater that humans rely on, Hatch said. Their dams generally slow water that’s traveling downstream, allowing it to percolate deep underground, where it’s less likely to dry up.

(By slowing the flow of water, beavers also help mitigate the severity of floods — yet another natural disaster that climate change can make worse.)

 


Real Trout fishermen are usually good friends of beavers. There are a few stupid ones that blow up dams but if they are worth their salted cod they know that beaver ponds are the best place to fish.

TALKING TROUT: The good, the bad and the beaver

In a recent TU National on-line newsletter there was an article called “Be the Beaver” detailing work that Lizzie Stifel participated in, in Northeast Oregon headwater tributaries, including streams in the North Fork John Day and Grande Ronde river basins. The work was with the U.S. Forest Service, the Bureau of Land Management, and Trout Unlimited. Lizzie is a TU intern.

The project was to place manmade structures that mimicked or resembled beaver dams

Quoting Lizzie from the article: “In Oregon, our crew forged this connection through a relatively new type of restoration tool: beaver dam analogues (BDAs). Water that backs up behind BDAs recharges the floodplain and increases the wetted width of the stream flow. Essentially, a BDA creates a porous wall of sticks, logs, and leaves that slows the flow of water in one part of the stream and retains much of this flow behind the ‘dam,’ allowing some of this backed-up water to seep into the floodplain. This beaver-like engineering helps promote channel aggradation, or in other words, prevents channels from incising into themselves and away from the natural floodplain.”

Well sure BDAs are popular until their popularity is tested by getting actual beavers. Then how do they fair?

The BDAs that have been and are being built in Oregon and other areas with high altitude, and that are located much farther north than Georgia, have been very beneficial to trout, giving the fish places to live and to feed. Many areas of Oregon suffered from devastating forest fires of recent times. Again, quoting Lizzie, “While many square miles of forests were devastated, after the burn, scientists discovered occasional patches of land that looked untouched in many cases due to beaver dams. Where many streams became troughs of black slush, the waters near beaver dams were clear and still harbored trout.”

Beavers are not always welcome in heavily populated areas and in close proximity to farms. Homes near beavers often lose favorite trees and shrubs. Smaller young trees are often first to go, as well as things from the garden such as green beans, apples, potatoes, lettuce and broccoli. My friend Steve, who lives on the river, complains of beavers every year.

Beavers in locations such as Oregon and northern areas such as Minnesota and Maine can be of great benefit to trout and other salmonids. In Georgia, the beaver ponds on most streams help with flood and sediment control and provide great habitat for all types of sunfish and other warm water fish.

Hmm. That’s confusing.  So beavers from one side of the country to the OTHER side can be a great benefit to trout and other salmonids. But in Georgia they only help warm water fish? Is it a latitude thing? Are you saying that in the southern states beavers make the water so warm that trout can’t benefit from them?

I’m putting on my thinking cap and I can’t pull up a single southern study on beavers and trout. Can you? I better ask Ben or Michael Pollock.

 

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