Archive for Ecology

#119 Fernbrook Natural Area hosts winter landscapes and much more

Massive hunk of sooty mold

January 15, 2009

Fernbrook Natural Area in northern Albemarle County near Stony Brook is host of images of death, decay, and resurrection in the flora and fauna of the Piedmont woods.

 
icon for podpress  Standard Podcast [4:49m]: Play Now | Play in Popup | Download

The January cold spell has arrived – always a harsh reminder, especially here in Virginia – of the intractability of winter.  Being from New England, it feels welcome, like a patch of remnant habitat – familiar and necessary for my survival.   The bite of cold when I first leave the house for my walk, the peeling back of layers as heat of my body meets morning chill. The knowledge of light that has come with experiencing over half a decade of Januarys, as the skies are brighter, the days are longer, but still, somehow, muted by the cold.  My need to be outside is greater at this time of year than others –against the inertia that a warm house foster, an urgency tugs at me as the voices of the winter landscape are calling.

I went to feed this winter hunger last weekend at Fernbook Natural Area, the  63-acre preserve owned by The Nature Conservancy in northern Albemarle County near Stony Point.  This time of year, it is a palette of earth tones, rich with every shade of brown, red, yellow, orange, and black.  Green pokes up here and there: running cedar emerging from the layer of leaves, the rhododendron on the northern slopes; and the ever-reliable, Christmas fern, though sagging from the weight of wingter, it is still standing, ready to be counted. The trail slopes down through a tall stand of red oak, hickory and yellow poplar towards a small stream that drains the ridge.  Only the beech trees and few oaks still hold their leaves, browned now, quaking in the slight wind.  The late afternoon light is mediated by clouds, occasional patches of blue lingering before a darkening sky.

This winter in particular, I am attuned to disintegration and death, and a forest like the one at Fernbrook is as good a place as any to find it.  Decay is everywhere:  dense downed logs along the trail are scuffed by travelers’ boots into light tufts.  The bark of Virginia pine still standing, is pocked by holes that spiral round the trunk marking the drill of the downy woodpecker.  A cavity higher up could be home to a pileated.  These are some of the larger agents of change in the forest, foraging for a meal beneath the bark of host trees giving way slowly to insects.

Still on the branches of beech trees, are black clumps of sooty mold.  A hunk the size of my fist has dropped to the ground at the base of a beech, and I pick it up – light as a sponge, this is final stage for the mold that is unique to the beech tree.  Scorias spongiosa, as a species of sooty mold that grows below colonies of beech woolly aphids, whose honeydew – or excrement – provides nourishment through its life stages.  In January, these aphids are long gone, but when I pry the mold apart, I find shiny black ants feasting on the spores.

Cleared in colonial days for timber, Fernbrook was abandoned sometime after the Civil War.  But here and there, the pencil-sharp snags of Virginia cedar point skyward, and from time to time, the slope is anchored by a mound of rocks that marked perhaps the corner of an old field.  The small stream has the characteristic steep banks of our Piedmont streams that have been cut vertically during the years of high erosion when no protective measures stemmed the flow of topsoil from newly logged acres.

Just as surely as I am looking at death and decay, I am also witness to rebirth, in everything from the defiant fist-like buds of the dogwoods in understudy, to the delicate, cigar-shaped twist of the beech bud.  Each soggy, rotten log hosts its own ecosystem of fungi, bacteria, and insects, thriving in dark spaces, drunk on the nutrients they release back to the cycle of life.

Through the bare trees I can see upward to the sky, another gift of winter and my spirit, likewise, has been lifted by this time in the woods.

Contents Copyright 2009 Leslie Middleton

Comments

#116 The Emerald Ash Borer

December 18, 2008

Learning to identify trees is the business of the amateur naturalist — and these days, one that includes learning about and spreading the word about invasive pests that are threatening whole species, such as the Emerald Ash Borer.

Last weekend I took a short walk along the scrubby and thinly buffered banks of the Rivanna near Free Bridge with some fellow Master Naturalists.  We were out to hone our tree identification skills – best done, I’ve found, after the fall of leaves when one is forced to use the most reliable tools of branching, bark, and leaf scar shape to confirm the ID.

Land disturbance and compaction at this site along the river has been pretty much uninterrupted

Read the rest of this entry »

 
icon for podpress  Standard Podcast [5:34m]: Play Now | Play in Popup | Download

Comments

#114 Winter Stoneflies

February 28, 2008

In the midst of winter, there are bugs in the stream that are alive and well – and some, eve, are hatching out to become insects, having found their aquatic niche at a time when no others compete.  During StreamWatch sampling on the upper Doyle’s, we find several families of winter stoneflies.

 
icon for podpress  Standard Podcast [5:10m]: Play Now | Play in Popup | Download

This show originally aired on February 28, 2008 and again on December 4, 2008 on “The Rivanna Rambler,” a weekly public affairs show airing every Thursday at 11:55 a.m. on WTJU 91.1 FM or wtju.net.

The upper Doyles River, like most headwater streams in the Rivanna watershed, is about as pristine as they come.  The waters that collect from springs and drainages of the land that is protected by Shenandoah National Park do not suffer the assaults of sediment and runoff that challenge the health of streams at lower elevations.  For this reason, the community based water monitoring program, StreamWatch, has chosen a spot high on the Doyles as one of several headwater streams that will be used during the next few years as “reference streams” – a standard of “as good as it gets in our watershed” — against which other tributaries of the Rivanna will be evaluated.

Read the rest of this entry »

Comments (1)

#112 Ginkgo Trees: The Oldest Living Plant

November 20, 2008

One of the oldest living plants on earth, Ginkgo biloba, owes its longevity to its ability to tolerate a wide range of climatic condition.

 
icon for podpress  Standard Podcast [
Warning: parse_url(/rambler/wp-content/plugins/podpress/podpress_backend.php?action=getduration&filename=http://www.cvillepublicmedia.org/rambler/wp-content/uploads/2008/12/112_rambler_ginkgo_mp3.mp3) [function.parse-url]: Unable to parse url in /home/.juilee/seantubbs/cvillepublicmedia.org/rambler/wp-content/plugins/podpress/podpress.php on line 151
5:22m]: Play Now | Play in Popup | Download

This show originally aired on November 20, 2007 on “The Rivanna Rambler,” a weekly public affairs show airing every Thursday at 11:55 a.m. on WTJU 91.1 FM or wtju.net

Occasionally, I get a call from someone – usually my husband – to report a sighting that is noteworthy of investigating for this show.  So last week, when my husband called, asking for the Rivanna Rambler in a whiny, pinched voice, I knew another tip was on its way.

“I want to report a tree,” the voice said.

I pretended it was a crank call.  “What kind of tree?  Who Is this?”

“A tree with leaves falling off of it.”

“What kind of tree?”  Hey, leaves were falling everywhere around town as the cold air and shorter days were finally forcing autumn’s leafy splendor to the ground.

“Gink-go.” The voice said.

Read the rest of this entry »

Comments

#111 Autumn on the Rivanna (Encore)

November 13, 2008

A warm day on the river traveling to Rivanna Mills to sample provides opportunity to reflect on the need for both the short and long view of changes in the watershed.

 
icon for podpress  Standard Podcast [
Warning: parse_url(/rambler/wp-content/plugins/podpress/podpress_backend.php?action=getduration&filename=http://www.cvillepublicmedia.org/rambler/wp-content/uploads/2008/12/_65-autumn-on-the-rivanna-mp3.mp3) [function.parse-url]: Unable to parse url in /home/.juilee/seantubbs/cvillepublicmedia.org/rambler/wp-content/plugins/podpress/podpress.php on line 151
4:40m]: Play Now | Play in Popup | Download

This show originally aired on November 8, 2007 and then again on November 13, 2008 on “The Rivanna Rambler,” a weekly public affairs show airing every Thursday at 11:55 a.m. on WTJU 91.1 FM or wtju.net.

There is something not altogether right about this day.  Here it is, November 1st, and we should be bundled in fleece and wearing high rubber boots to venture out on the water.  Instead, we’re wearing light rubber wading shoes that sink into the mud as we shove the canoe from the launch into the Rivanna at Hells Bend Farm, striving for a patch of water that will be deep enough to float the boat.  Though the water is a cool 56 degrees, the air temperature is climbing past 65 as the sun arcs into the autumn afternoon.  I’m not sure what doesn’t feel right: is it the air temperature? or the water level? which is still near historic lows in spite of patches of rain we’ve had.

Read the rest of this entry »

Comments