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

Month: August 2009


I always remember enjoying my astronomy class. I liked staring up at the constantly rotating planetarium ceiling, and I liked writing notes with a flashlight. I even enjoyed the weird math procedures necessary to add hours of ascension, which is almost unheard of in my “math is hard” brain. I remember one night the teacher telling us to look for the nebula near the spiral and me whispering to my classmate in a panic “What’s the spiral?” Was he referring to our galaxy? Some weird space shape newly documented? We generated anxious questions along the whole back row until a very calm person in front of us said that by “spiral” he was referring to the binding of the notebook.

Oh.

Anyway, notwithstanding that memorable bit of panicked stupidity (or perhaps because of it) I liked astronomy. I especially liked the idea that certain constellations, like the big dipper, were “circumpolar” meaning if your latitude was high enough they never set at all for you but simply rotated around the sky like the lable on a record. I mention this because one of our most important beaver friends, Mike Callahan of beaver Solutions, is this very day in Juneau Alaska under a circumpolar (but very rainy sky) and getting ready for some beaver management training next week.

You’ll remember that Bob Armstrong got together a group of volunteers to work on keeping the pathways and culverts clear when some Mendenhall Glacier beavers started to outwear their welcome. Like all problem solving involving beavers, the only solution offered was the final solution, and Bob wasn’t willing to let that happen. So he and a group of scrappy beaver-saving friends showed up on weekends to mitigate the damage. I read about this wildly familiar dedication and wrote Bob to start a dialogue. I learned that their primary concern was dealing with the beavers in a way that did not block salmon passage. I put him in touch with Skip Lisle and Mike Callahan, and talked about solutions.

Mike and Bob talked about beavers and big pictures and longer term solutions that helped, rather than hurt, salmon. They arranged for Mike to come to Juneau this week, and he’s even staying in Bob’s home and getting the inside view. Two weeks before he was leaving he got word that he had received the AWI grant, and agreed with my suggestion that Juneau training would be an ideal place to film, so his videographer friend is coming with him and will catch the training for posterity.

In the meantime beaver friend LB is happy to hear that Bob is a nice guy in person because she’s meeting him for a blitzkreig beaver tour of the Mendenhall Glacier when she visits Juneau next month.

Just in case you forgot the lovely view those beavers wake up to each evening, here’s a reminder. Imagine this with dripping rain and 50 degree weather and you’ll have some idea how it looks to Mike right now.

Photo: Bob Armstrong from The Mendenhall Glacier Beavers



[youtube:http://youtube.com/watch?v=ELGZCww0ikI]

Beaver friend GTK let me know this was accidentally classified as “private” which has now been changed. Sorry about that!  Last night we sat in unbeavered silence until nearly eight O’Clock, when all at once this little muskrat made an appearance, immediately followed by the low over-the-dam flight of two green herons and then voila! A beaver! I was interested in how he’d greet his muskrat neighbor, so I had the camera pointing to the right place! That’s us giggling in the background.


Years of heading back to school in the fall have left me imprinted with an instinct to buy new pencils and crisp binder paper around this time–maybe even a new pair of shoes. I can’t remember how old I was when I finally realized that September was the End (not the beginning) of the year, but I’m still confused by it.

I actually dislike summer, and August particularly. By this time I’m usually craving cool evenings and long sleeves. I always get a little excited as we start the countdown to September, but this year, I’m also getting a little nervous.

it was September 15 last year that I got the seemingly innocuous email from the city engineer that they were going to “take down the dam a bit” to lower the water level so they could check for holes in the bank. Within a month they had issued a report to allow emergency exception to the standards of CEQA and voted to install a wall of metal through the beavers living room. I was just coming home from my birthday vacation to the coast when I saw our brave city manager and city engineer gathered at the dam and plotting their next moves. I blogged about it here:

I will tell you the most striking finding of the day: staff had not considered the impact of the tides. They were so high that no one would have been able to “drain” off that water. I was asked, “is this because of the secondary dam?” No, I explained.

This is because of the moon.

Is it just me or are you getting a little apprehensive about what “emergency party” the city might decide to suddenly throw before the October 30th deadline? Councilman Ross may have been showing his hand a little when he cautioned that “because of EL NIÑO this year, we might need to make some compromises”. I shudder to think what they imagine we have left to compromise on, but I guess we should all pay very careful attention.


The beavers have been number one in dam-side cuteness for so long it must come as a shock to them that other creatures are giving them a run for their money. Remember when they were the only show in town, and a trip to the dam was entirely focused on them?

Victims of their own success, the beavers built the lovely habitat and now everyone wants a piece of it.  First the squaking green heron with the telltale band, then the adorable procession of baby muskrats, followed by those hollywood mink super-starlets with their sunglasses and trailing furs… and now this! The pesky bandit family of 6,7,8 (?) are seen here showing off the very skill beavers lack (climbing) in the very place that beavers most value (willow trees)!

Faced with such an uneven playing field, the beavers have decided to fight fire with fire. Drawing from the teenage-girl-getting-attention playbook they settled in to demonstrate rarely seen behaviors in prominent trademark places to keep audience interest. You think I exaggerate? See for yourself.

Photos: Cheryl Reynolds

This beaver is sitting on the primary dam, grooming himself with his foot in the air like a ballerina from a Degas painting. Quick get the camera!


I thought I’d start out with some images this morning of varietal feeding demonstrated by the Martinez Beavers: this is a yearling eating grass. And don’t worry, it’s not because he’s starving or can’t reach the high branches. Beavers eat a variety of plants, shifting their diet with the seasons. We’ve seen them enjoy tule, fennel, sow thistle, blackberry, and now grass.
[youtube:http://youtube.com/watch?v=yha7cgsnMRI]

Now for the real news…

The National Oceanic Atmospheric Association is the respected name in news that is too big to ignore. When there’s a hurricane approaching or a tornado warning or a sudden snowfall in the sierras, NOAA is the best predictor of what’s to come. It was report from NOAA that indicated to Louisana that Katrina was making her angry way to the coast. It’s NOAA that’s tracking newly formed “Bill” now and whatever Carley or Catherine that comes next.

I was surprised, then, when beaver friend Lisa Owens Viani sent me their new report on restoration measures for creeks. Its slick online tool “River rat” has everything you need for getting your tired, littered creek back to “Ship-shape” standards. It has advice on all the various tools you need to repair your watershed, and talks about the multiple hazards for our dwindling salmon population,

Guess what the NOAA recommends for increasing the numbers of salmon in an urban or rural creek? I’ll give you a hint, it starts with a “B”. It’s those crazy dams that everyone’s talking about! Apparently they make habitat for juvenile salmon in the winter, and the more salmon that survive early life to try their tails in the open ocean, the bigger crop your likely to have down the road.

Guess what they DON’T say is a problem for salmon? Beaver dams! NOAA is no fly-by-night, crazy beaver-luving organization. They are the arguably the single most trusted government agency in the world, so if they say beaver dams don’t hurt salmon I think we should probably isten. Apparently our very smart salmon can wait until high water periods and hop on over. Hmm, I think we might know this tune. Hum a few bars and let’s all join in! Afterwards maybe we can play a drinking game and do a shot for all time times we heard someone pretend to be worried that saving beavers will “hurt” the salmon population.

The loss of beavers, and subsequent degradation and failure of their dams and  associated wetlands, has dramatically affected the hydrology and sediment regimes of many western streams. Impacts associated with beaver decline are particularly pronounced in semi-arid regions and likely contributed to impacts associated with grazing, resulting in accelerated channel incision and associated lowering of groundwater levels and loss of summer base flows (Pollock et al. 2007).A recent comprehensive literature review of the effects of beaver impoundments on fish (Pollock et al. 2003) illustrates that loss of beavers in all probability was directly related to significant population declines of virtually all native fish species cohabiting with beaver.

pg 70: Science based tools for evaluating Stream Engineering Management and Restoration Proposals. Prepared for NOAA Fisheries and US Fish and Wildlife Services. April 2009

Scratch that idea. No drinking game. We need to be sober to spread this good news. Who wants to break it to Scotland?

BEAVER FESTIVAL XVI

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