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

Month: January 2010


Our Estuary friend sent us a chapter she copied from the 1940 Audubon publication called “Bird Lore”. The title was “Beaver and Birds” by William H. Carr. From the opening sentence I was completely hooked.

No one could observe beaver and beaver ways for long without realizing that a unique bond exists between the pond builder and its bird and animal neighbors. We do not know whether birds and animals have the sightest ‘ interest’ in their flat-tailed benefactors, nor are we particularly concerned with this speculation herein: The fact is that whenever beaver are introduced and thrive in state or national parks, under complete protection from hunter and trapper, a highly important series of events is gruadually set in motion. Before many years have passed, innumerable wildlife developments have taken place, developments of increasing consequence to the welfare of local animal life in general, and to birds in particular.

How is it that this recognition was  printed 70 years ago, and fish and game were still able to argue that beavers threatened vireo in Lake Skinner Reservoir in the Riverside County Case?

The resolution described that in two creeks on the Reserve, Tucalota and Middle, beavers had cut down mature cottonwoods (Populus sp.) and willows (Salix sp.), including trees up to two feet in diameter. In some locations,tamarisk had replaced those trees cut down. The riparian zone of Middle and Tucalota creeks also supported nesting pairs of least Bell’s vireo, a federally listed endangered species, along with other sensitive riparian bird species.

Management by Assertion: Beavers and Songbirds at Lake Skinner (Riverside County, California)
Travis Longcore Æ Catherine Rich Æ Dietland Muller-Schwarze, 2007 Journal of Environmental Management

You will remember the “friends of lake skinner case” where beavers were removed because they were supposedly threatening habitat for endangered birds? A group of citizens successfully sued in appellate court that removal of the beavers without an environmental impact report was a violation of the California Environmental Qualities Act. How is it possible to continue to lie about beavers harming birds, when there is at least 70 years of data saying they significantly help birds?

Stephen Colbert might say this was an example of “Truthiness”, something that “feels true” and is therefore valued whether or not it has any factual basis at all. Beavers cut down trees > Birds need trees = Beavers harm birds. Seems true, right? We invaded Iraq after 9/11, so they must have been responsible for the world trade center bombing, right?   The city council says that the propsed Pacheco annexation is the “Gateway to Martinez”, so it must be true, right?

The Colbert Report Mon – Thurs 11:30pm / 10:30c
The Word – Truthiness
www.colbertnation.com



Saturday’s likely rain means that Thursday and Friday won’t be adequate for installation. Sorry for the false alarm, but I promise to keep you posted when the sunshine allows our project to move forward.


Part II: Public Outcry becomes Public Art!

Tomorrow morning Escobar bridge will be taped off by city staff and our contractor Dimitry Doronkin will begin the task of laying the ceramic painted tiles on the bridge surface. He will be helped by Roger of the Environmental Studies Academy, a student of Rona Zollinger and the son of a tile & granite contractor himself. Worth A Dam will be there, handing out water, picking up trash and making sure the right tiles go in the right places.I heard from Lisa at the Contra Costa Times that we might even have a photographer stop by to record the moment.

Dimitry tells me they will lay tiles on thursday, and grout them on friday. The tile will be sealed for graffiti and UV protection, and will need to dry 72 before the last layer can be applied. Maybe you’d like to stop by and honk your support? The blue trim tile was purchased at Laufen tile in nearby Pacheco, and they kindly gave us a “school” discount for beavers. The trim pieces will be cut today by Chris Johnson at Bullnosing by Craftsman on Nardi Lane in Martinez. Jon is meeting Dimitry at the Home Depot in Martinez to buy supplies. All in all it couldn’t be a more local project.

Back in July, Worth A Dam was able to land an interview plugging the beaver festival on KCBS. The beaver-weary radio man made a series of veiled remarks bemoaning their presence and said “I guess Martinez has decided to turn its lemons into lemonade“. Sigh. What can you do to combat that kind of prejudice?

Now I think I would smile very indulgently and say, “Gosh I don’t think its entirely fair to call our city council “lemons“. Sure they’ve been difficult, but we have managed to work with them.”

 

 


So I sent Cheryl’s lovely photo to Lisa Ownes Viani yesterday and she sent it around to her fish buddies, Bruce Herbold, Ph.D. and Robert Leidy. Ph.D. of the EPA. They got out their detective skills and set about counting fins.

well, Rob Leidy and I both think that it is probably a tule perch.  We both also first thought that it was probably some sunfish, but magnification clearly shows the line of scales along the dorsal fin that make it an Embiotocid rather than a Centrarchid and the absence of barring on teh body and the fact that it is in or near fresh water would make it most likely the tule perch Hysterocarpus traskii.

Bruce went onto say that a tule perch was his favorite because of its unique reproduction. Mom bears all the young live! That sounded pretty wild to me, but after learning that our snipe engage in joint custody arrangements, anything was possible. The UCB California Fish Website had this to say about tule motherhood:

Young perch then begin to develop within her, slowly at first, and more rapidly in the final two months. In around May or June the female bears 10-60 live fish. The number of young produced increases with body size and may vary from one environment to another.

It also pointed out that these perch require “cool well-oxgenated water”, a description that many beaver-phobic biologists have warned would never happen because of the beaver dams. But my favorite message came from Robert Leidy, who added this little tidbit:

By the way, I think this is the first record for tule perch from Alhambra Creek, as I am not aware of any historical collections or records!

The keystone beaver strikes again! Let’s just take a moment to enjoy the series of connections necessary for this to happen. Cheryl took the photo because she was out watching for the beavers. I sent the photo to Lisa because I met her through the beavers. Lisa sent the photo on to the top fish biologists in the state who worked to agree on its identification. Robert recognized it was a first sighting. And our wikipedia friend immediately recorded the find on the Alhambra Creek pages.

That’s what I call successful cooperation! And the beavers get the credit for it, which they genuinely deserve. Keep your eyes out for new species down at the dam! A team of experts is standing by….


Photo: Green Heron at Primary Dam 1-10-10 Cheryl Reynolds

Just in case you wondered what that crabby green heron is doing when he seems to be standing so still and looking for lost change in the water: here’s a hint. Look at the size of that fish. Not a meager challenge for a bird that can’t chew. This picture was take too early in the morning for great light, but its a fantastic glimpse of his culinary treasure. Anyone recognize the victim? Fish ID help?

We saw two yearlings this morning, and had a lovely close encounter with mom as she rooted around in the dam sticks for a treasure she just knew was there. Her eyes look the same, maybe a little better, but she is active and groomed and went home to sleep in the lodge.

If the fates are kind to us this year she is already pregnant. It was early January two years ago when Moses showed me footage of the parents nearly mating. That’s how we first knew mom had the different tail mark. (You could tell who was who by what they were um…doing). Now we just hope they um…do it again and give us kits for 2010.

Fingers crossed.

BEAVER FESTIVAL XVI

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