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


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Sweden has been doing a remarkably good job in beaver-research lately. It took them a while but they seem to be firmly on the beaver-train now. Just just look at this great thesis from Lovisa Hökby, a PhD student at SLU.

Beaver’s role in the spread of tularemia investigated: No increased risk found

Beaver dams have sometimes been identified as potential hotspots for pathogens and the spread of animal-borne diseases such as tularemia. But a new thesis from SLU clears the Swedish beavers of these suspicions. Beaver ponds do not pose a greater risk of disease transmission than other wetlands.
– Beavers build dams and create wetlands that promote biodiversity, but these same environments can also favour the spread of zoonotic diseases. Having now investigated and assessed the risks, we can see that beavers in Sweden do not appear to cause an increased spread of infection, says Lovisa Hökby, a PhD student at SLU and the author of the thesis.

One of the pathogens she has examined is the tularemia bacterium. It can be transmitted to humans via mosquitoes, which are often abundant in stagnant water and ponds. Whilst working on her thesis, Lovisa Hökby  collected water samples from both beaver dams and other wetlands in Sweden. The water samples, along with tissue and faeces from beavers, were then tested for a total of 21 different infectious agents, known as pathogens. These included the bacterium that can cause tularemia.

Well what did she find?

– The results show that pathogens occurred at similar prevalences in wetlands regardless of whether there were beavers there or not. Nor do the beavers themselves appear to play a central role as host animals. Most of the beavers we examined tested negative for all pathogens, says Lovisa Hökby.

There you go. Beavers and their ponds do not cause or carry Tularemia any worse than any other wetlands. And in fact since there is greater diversity at beaver ponds and lots of things that eat mosquito larva they may actually reduce its prevalence.

Click on the link at the headline to read the rest of the article or if you want to hear more or participate in her dissertation defense.

Thanks Lovisa.


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TIME FOR BEAVERS TO GET TO WORK.


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I like to think the beavers were helpfully pointing out that materials have to be carefully selected

Beavers destroy sign warning about beavers

A sign installed to warn the public about damage caused by beavers has been destroyed by the beavers themselves, according to the Polish foresters who erected it.

The incident was reported in a post on social media by the forestry district of Lubliniec in southern Poland, which shared photos of the sign, which read “Warning! Damage caused by beavers”. The wooden post it was displayed on had been destroyed in an apparent beaver attack.

“We wanted to warn you about the potential consequences of beaver activity at the pond and the surrounding area – since beavers dig burrows under the road and fell trees near the pond – but the beavers didn’t want you to be warned, so…they cut down the oak post displaying the hazard notice,” wrote the foresters.

“So, if you are around the pond, please exercise caution; and if you spot a piece of wood sticking out of the ground that has been gnawed by beavers, just imagine there was a sign there reading ‘Warning! Damage caused by beavers’.”

Beavers were once almost hunted to extinction in Poland. By 1928, it was estimated that only 235 remained in the country. However, thanks to postwar efforts to reintroduce the animals into the Polish wilderness, the beaver population has grown and is currently estimated at around 150,000.

Ecologists note that beavers play an important role in tackling drought by retaining water through the dams they build. Those dams also create “oases of biodiversity”, notes the state water agency PGW WP.

However, the rodents can cause damage to roads, houses and farmland, which has led some to call for culls to keep beaver numbers down.


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So well done and thoughtful. There’s really only one part I disagree with. I bet when you watch you will be able to guess what it is…

On the University of Washington Bothell campus, a family of beavers has transformed a restored urban wetland — and challenged the grounds team responsible for managing it. Follow one student’s investigation into how beavers reshape landscapes, support wetlands and help us withstand a changing climate.

A film by Kenny Katz


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Years ago, before the world was woke to beavers, when Martinez was acting like a tyrant about hosting a handful of the villains in Alhambra Creek, I used to look wistfully north and see Washington state and all its good works and view it as a kind of  Nirvana where beavers were treated like water deities. And I would be SO JEALOUS. And think, SOMEDAY. That could happen here. Maybe SOMEDAY.

And with all that wishing and dreaming I never stopped to think that the reverse was also true. By which I mean that the entire genuine Martinez-stupidity disease could spread North.

Washington landowners say county-owned beaver dams left wells brown as parts of creek ran dry

A dispute is unfolding along Clover Creek in Pierce County, Washington. Residents say county-owned parcels thick with vegetation and beaver dams are flooding private property, turning well water brown, and drying up parts of the creek.

Property owner Bob Trapp told KIRO 7 that his Tacoma property along Clover Creek once included grassy acreage where his dogs could roam. The land now floods for part of the year, Trapp said, then dries into cracked ground in the summer.

“This whole thing is covered with water,” he said.

Trapp said the flooding has also turned the water in his shallow well brown.

“We have to boil our water, because we don’t know; it stinks like

swamp,” he said.

Well now. That doesn’t sound like Washington does it? That sounds like Contra Costa stupid. Maybe worse. I am just fascinated to see how the smarty pants state handles this ignorance. Wait, get me some popcorn,

“This whole thing is covered with water,” he said.

Trapp said the flooding has also turned the water in his shallow well brown

Smith said the county is continuing to monitor the area and actively managing it to support public benefit, protect natural resources, and address local flooding concerns.

Residents and restoration advocates, meanwhile, say degraded parts of the creek need more direct cleanup, especially where they believe invasive growth and obstructions are worsening conditions.

As Grams put it, “It’s an uphill battle.”

including on county-owned property between 20th Avenue East and 25th Avenue East.On the far side of those same county parcels, resident Randy Grams said he is dealing with a different result: too little water in the creek bed near his home.

“A lot of the trees are drying out and dying,” he said.

Once a year we have the local chimney sweep in to clean the stove pipe. And every year he complains about flooding in Martinez. He says he lives two miles away on the creek and his yard floods every year almost to his door.

Because of the beavers. He explains.

Sometimes I try explaining that we haven’t had beavers living in the creek for a decade. Ot doesn’t make a whit of difference. He says the same thing the next year. Sometimes I just let him do his shuffing and hozing. Because what I say really doesn’t matter. His mind is  made up.

Maybe he has a brother in Washington.

On the far side of those same county parcels, resident Randy Grams said he is dealing with a different result: too little water in the creek bed near his home.

“A lot of the trees are drying out and dying,” he said.

Grams, a member of the Clover Creek Restoration Alliance, said volunteers have been trying to get into areas they consider blocked, overgrown or otherwise degraded so they can help clean them up.

“It’s an uphill battle,” he said. “We’ve tried to get access to some of the properties to go in and clean them up where the creek is degraded and overgrown and has invasive species growing, and they don’t want

County officials say residents are oversimplifying the situation.

Amanda Smith, a public information specialist with Pierce County’s Planning & Public Works Department, said the county has confirmed beaver dams on its land but believes there may also be additional dams on private property both upstream and downstream.

“This reach of Clover Creek is very flat, and both high surface water and high groundwater levels are common,” she wrote in an email. “The area is designated as a regulated floodplain and a wetland. Elevated water levels can result from multiple factors and are not solely attributable to beaver activity.”

“These county-owned properties are allowed to function in a natural state to provide water quality and ecological benefits to the stream,” Smith wrote, adding that shrubs and tall grass help keep water clean and that downed trees can help reduce downstream flooding.

See what I mean about Washington? So well-meaning. Flood plains and ecological benefits. They might as well be speaking Armenian. These words are not the words that comfort anxious residents.

County officials say residents are oversimplifying the situation.

Amanda Smith, a public information specialist with Pierce County’s Planning & Public Works Department, said the county has confirmed beaver dams on its land but believes there may also be additional dams on private property both upstream and downstream.

“This reach of Clover Creek is very flat, and both high surface water and high groundwater levels are common,” she wrote in an email. “The area is designated as a regulated floodplain and a wetland. Elevated water levels can result from multiple factors and are not solely attributable to beaver activity.”

“These county-owned properties are allowed to function in a natural state to provide water quality and ecological benefits to the stream,” Smith wrote, adding that shrubs and tall grass help keep water clean and that downed trees can help reduce downstream flooding.

Smith said the county is continuing to monitor the area and actively managing it to support public benefit, protect natural resources, and address local flooding concerns.

Residents and restoration advocates, meanwhile, say degraded parts of the creek need more direct cleanup, especially where they believe invasive growth and obstructions are worsening conditions.

As Grams put it, “It’s an uphill battle.”

I’m thinking you need a couple neighborhood barbecues where the city buys the beer and the steaks and there are plenty of smart folks on hand to talk sense about beavers. Have a chat with our friends at Cows and Fish, maybe. Sometimes it takes a real neighborly approach to welcome new neighbors.

Invite my chimney sweep, will you?

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