By Beth Sullivan
As we wind up our fall
cleaning, we often make piles of leaves that will compost, but
sometimes we are left with fallen branches and limbs that are too big
to compost easily, and we just don’t want to haul to the landfill.
In my own garden I can make nice piles of sticks and branches and
always notice that those piles are the first places that Sparrows and
Wrens seem to choose when the day ends and the weather gets cold.
A Song Sparrow perches on top of a brush pile but later will find refuge inside it. |
We are doing fall clean
up on the preserves as well, but we do not try and get rid of all our
woody rough debris. Deep in the woodlands, these branches, some still
with leaves, would be left to decay naturally. Those closest to the
ground will be affected by ground moisture and start to rot first. A
log on the ground provides shelter for numerous life forms, from
worms and slugs, insects, spiders, centipedes, millipedes, and on up
to salamanders, small mammals like mice and shrews and voles, and
even snakes. The tangle of branches that remain suspended above
the ground will decay more slowly. They provide shelter and cover for
some of the same creatures, but also larger mammals, including
rabbits and squirrels and birds, will inhabit the top levels. Think
of a small mammal or bird being pursued by a hawk. The tangle of
branches protects the smaller creatures while thwarting the predator.
During the winter, the snow cover helps insulate the pile. |
Brush piles feed the soil
Over time, the leaves,
small branches, and pieces of wood continue to decay. Beetles move
in, and termites and ants take up residence in the rotting wood.
Worms do their part in composting and recycling. Nutrients return to
the forest floor and nourish remaining plants.
In Summer, vines and plants grow in the brush pile. |
Where tree limbs come
down on the trails on Avalonia Preserves, it can be a big effort to
remove them and open the trails and make them safe. In many cases we
are able to make well -constructed brush piles. Instead of loosely
arrayed branches just left on the side of the trail, a beneficial
brush pile is denser, more solidly piled. Heavier pieces are left
closer to the ground to provide support and structure as well as good
sized gaps close to the ground. Mid -sized branches are criss
-crossed on top next, and the whole pile is covered with smaller
pieces, especially evergreen boughs, to fill in the gaps. Think of
the pile covered deep in snow in the dead of winter. The smaller
spaces within are protected from biting winds and even retain some
warmth from the ground in the face of sub-freezing temperatures.
Small mammals can stash food-nuts, seeds, grasses-eliminating the
need to venture out. Birds also will find protection within.
Sparrows and wrens in particular make use of man-made piles.
While clearing invasive species, the debris is left to cover the ground in many places. |
To make a good brush pile, put bigger pieces on the bottom, making nice holes. |
Then pile on brush for shelter. |
Look for brush piles as you walk
As you walk on one of
our Preserves, look for man-made brush piles. Paffard Woods has
several and Perry Natural area as well. There are piles from Red
Oaks and some from White Pine that were toppled by Storm Sandy in
2012 and are still present and providing shelter. The Knox Preserve
has been cleaned up and the bigger piles removed to get out of the
way of our mowing efforts. You will notice piles along the trails
that look messy and off the top of the knoll there is a dense pile of
cut limbs. This is quite deliberate. We have cut invasive vines and
treated the stumps to prevent regrowth, but the branches were left in
place to provide the cover that the birds enjoy. Observe from a
distance to see what activity occurs at the piles. Later in the
winter, when snow covers the ground, look for tracks and trails
leading to and from the piles. Nature does a good job of protecting
small creatures, but Volunteers can enhance the effort with great
success.
Woodchucks will make their entry holes at the base of a brush pile for greater protection. |
I suggest making a
small pile in your yard and garden where you can watch from indoors
and enjoy the activity.
Photographs by Beth
Sullivan.
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