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It's not really much
to look at. A little bit too big to call a stick, but not quite big enough
to call a log, the piece of wood is a more or less straight, 8 inches
long by about an inch in diameter. Black on one end, fading to gray on
the other, it's splotched here and there with an ocher colored mud. I pulled it out of
the bank of a small stream close to my home. This small stream runs through
an open field, a former pasture that used to graze a herd of cattle. For
what ever reason, the farmer who's land it is that the creek runs through
got tired of grazing his cattle out there. The cattle went somewhere else,
and all that's left now is the creek running through the open field. |
I was there at the creek with my seven-year-old daughter. We had met a couple of friends of ours there, one a Habitat Biologist with the Wisconsin Department of Natural Resources, the other his seasonal assistant. Together, we were waiting for more people to show up, all of whom were going to help out with a restoration project that still another friend had organized. The project centered on restoring this stream, subject to a century of non-existent land management practices, to a point where it's wild brook trout would be able to not only survive, but reproduce, as well. Shocking surveys indicated that only a very few of the small char lived in the cold, clear water; the streams sediment load allowed only the barest minimum of cover for the fish to survive. While
we were waiting, my friend caught me up on the details of the project.
He showed me where the wooden "lunkers" had been placed; basically
a large wooden pallet, a lunker is placed along the bank of a stream,
under the water. Rock is piled on top of the structure, and dirt is bulldozed
over that. Seeded with grass, it eventually becomes a cut-bank, accomplishing
a number of things all at once. The wooden structure becomes home to many
types of fish, both trout and other species. The once collapsing banks
are now stabilized with turf-covered rock, and the now narrowed stream,
swifter and colder than before, is now better able to scour down to its
original gravel beds. "There
a bunch of it down here - here, let me show you." We walked over
to the bank, and he pointed down to the edge of the stream. Sticking out
of the bank under the water was a snag of wood. I stumbled down to it
and pointed a questioning finger at it. |
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"Yeah, that's one of them. They're all over down through there," he replied. My friend went on to explain how you could tell the ancient lumbers approximate age by the angle and depth of the woods deposition. Below the agricultural runoff of the previous century lay the former stream bank. Below this lay gravel and fine grained, wind blown loess clay beds deposited by the glaciers. Sticking out of this was an ugly piece of wood, a little bit too big to call a stick, but not quite big enough to call a log. As
I grabbed hold and pulled the stinking, mud-covered branch out of the
bank, my imagination swam with the possibilities... |
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