Filling In
(And, the “Goblin”
Gets Ready for Halloween)
October 11, 2017
(Note: some photos are of
the same views taken for the previous post. Go to “The Scree”,
October 4, 2017, for comparison.)
I will start right out
with big questions; What is this place? Where is it going?
I've pondered the first
question in the early days of Cottonwood Pond in the post called
“Pond(ering) ...” of July 23, 2013 – is it a pond? A pool? A
puddle? I will ponder this further sometime this winter when things
slow down and I can assess what the previous year, and four years,
has done.
Much has changed during my
four-year study of this place, and so the factors for considering
what this place really is, and what it has become, have also changed
since 2013.
The shape and depth of the
“main pond” - that is the major thing. Over time, water and
sediment have been shoved into the pond from run-off that has
traveled through the Inlet (under the Barkless Log,) which has
widened and deepened from a couple of small holes to a complete
rectangular opening under the log. That sediment added to the fill of
the pond floor, and the water sculpted the perimeter and bottom into
new shapes and dimensions.
From the north - "little pond"
Water and sediment also
poured under the Trunk and into “little pond” on the other side,
again sculpting and depositing, sometimes flowing on via Temporary
Creek #2 to meet with the Creek downstream.
The push of water opened
up a Cove at the bottom of the Root Ball. Both water and frogs could
pass through between the main and “little pond.”
Most significantly, soil
kept falling from the Root Ball (Top and Bottom,) thinning its
profile and exposing more Cottonwood roots. Through rain, freezing,
thawing and, most recently, extensive drying, soil has been loosened
and dropped. Animals have also loosened dirt as they dug burrows into
the Root Ball soil.
New, dry Root Ball soil added to the Mud Pile below
Falling soil first created
Mud Pile #1 below the Root Ball Bottom, to the northwest end.
Eventually Mud Pile #2 was created at the southeast end. These
supported new populations of plants.
Jewelweed plants, beyond blooming on October 11, pushed over by soil fallen from the Root Ball
Almost suddenly, there
became only one whole Mud Pile stretching across the base of the Root
Ball Bottom, growing higher and blocking the Cove, though not closing
it (since the Root Ball Bottom is exposed to much more weather and
change than the Root Ball Top, it has experienced more erosion, with
a greater pile-up of soil below.)
The Mud Pile changed the
dynamics of the main pond, giving it more of a crescent moon shape
(it had started out as a distinct half moon.) The main pond may also
have become more shallow.
Root Ball, Mud Pile and main pond bed on October 11
Lately, a great deal more
soil had dropped from the Root Ball, not only onto the Mud Pile but
also pouring down to the pond bottom (i.e.: The Scree.)
What will become of this
spot? Will it become ever shallower, or will excess sediment be
pushed out by heavy water flow, into the Seep, and also across the
Isthmus?
End of the Seep (bottom) as it enters the Creek (spanned by Very Rotten Log)
The Isthmus, connecting the main pond with "little pond"
How will the shape of the
bowl of soil (main pond) change? How long will it be before the Root
Ball is devoid of soil and rain has washed the last bits from a
scraggly skeleton of roots?
Root Ball Bottom, Mud Pile, Scree
Whole Root Ball - tree saplings on left side
When the soil is all gone
from the Root Ball, what will become of the rapidly-growing tree
saplings that have taken root in the Root Ball Top and the top edge?
Or, are they effectively holding the soil in with their own roots,
turning one Cottonwood tree into a group of diverse tree species?
Old Cottonwood roots have been decaying, and succumbing to the work of birds and other animals, or breaking and falling to the ground
Will the main and “little
pond” ever again fill with enough water to support frogs and other
aquatic wildlife I have found there over the years?
We have just gone through
a near drought season, when almost everything became completely dry.
Rains were simply absorbed by the thirsty soil and plants, with no
chance of pooling or running. It will take a series of sustained,
heavy rains, and maybe even a significant snow accumulation and melt,
to know how the newly reshaped soil bowl will respond.
We finally had some good,
steady, heavy rains on October 11 and previous, enough to break the
near-drought period. Everything at Cottonwood Pond was soaked and
glistening, though still not pooled or running.
The Creek bed near Cottonwood Pond, looking upstream
The slope facing Cottonwood Pond, and the bottom land below, with Creek bed
Wet woodland floor on the slope
The soggy soil of the Swampy Spot on October 11, after days of heavy rain
The new Scree, in the middle, was soaking wet on October 11 for the first time
Water had soaked into the
hard clods of silty soil of the Scree, softening them and even
allowing them to crack. Soon they should disintegrate and add much
more sediment to the pond floor.
Scree clods beginning to meld into the pond bottom
And, more dry grains of
soil had fallen after the rains.
Hard rains also had sent
more leaves and sticks from the canopy to the floor, especially as
autumn was starting to become more brittle. These would also
disintegrate into the pond floor.
Sycamore leaf
Sassafras leaf
Dry, skeletonized leaf on the pond floor
Section of Cottonwood root fallen from the Root Ball Bottom onto the Scree
Broken-off section of the upper Very Rotten Log, in the middle of the main pond
Clearweed plant, possibly with chlorosis, on the upper broken, mossy section of the Very Rotten Log
Plants, including tree
saplings, continued to feed from the Root Ball soil and help break it
down.
New vine on the Root Ball Top
The Trunk continued to
feed fungi, lichen, moss, and flowering plants, which help break down
its wood.
Decayed Oyster mushrooms along the Cottonwood Trunk
Mosses and blue-green Lichens on the Trunk
The Trunk's fallen bark
pieces added to the woods floor as well as “little pond,” into where
they had been washed.
So, it remains to be seen.
I wait for more rains and hopefully snow.
Since it is nearing
Halloween, let's take a look at the “Goblin” in the Root Ball
Bottom and how he has changed. Last time, he lost his nose!
Now that the Cove has been
re-exposed, the Goblin is sporting a toothy grin!
And, as soil falls from
the top edge, his vine-y “hair” has become more scraggly, and two
pointy “ears” have been exposed.
Nice Halloween costume,
Cottonwood Pond!
Some plants in seed on
October 11, 2017:
White Snakeroot
Great Blue Lobelia
Wood Nettle