Tuesday, July 1, 2014
Wednesday, April 23, 2014
Ephemeral Pools
In mid to late March, or in the case of a severe winter,
early April, the first signs of spring can be witnessed stirring in shallow
woodland pools filled with amphibians, reptiles, and even freshwater shrimp.
These creatures appear at least a couple weeks prior to the wildflowers that we
often view as the harbingers of spring. Usually
we will know the season has arrived by sound, rather than sight. After the
first warm rain, amphibians roused from their hibernation in the mud and
detritus of the forest floor gather together in copious quantities in temporary
ponds that have appeared with the addition of melt water from winter snow and
ice. The small ponds, usually not larger than a backyard swimming pool, go by
many names, such as vernal, woodland, or ephemeral pools, generally with the
latter being most appropriate. Within the basins a sonorous and usually
deafening hymn can be heard going round the clock for several weeks. A walk in
the quiet solitude of a gray-brown forest is often quickly interrupted upon
approach of one of these pools, quickening the pulse, and giving proof that the
landscape is in the process of being rebooted, just as our sluggish minds and
bodies are after being confined these past long, cold months.
Without a doubt, the first, and most prolific life to be
found, is the wood frog. This species has a wide distribution ranging from the
Southeast to the Midwest, and into Canada and Alaska. On a cold day just before
a warming rain, these pools are empty, aside from the innumerable leaves and
branches lining the bottom, and are nothing extraordinary to behold. After the
water begins to penetrate the leaf litter and sink into the ground, the frogs
burst from their hiding places in unison during the night if the ambient
temperature spikes to at least 40°, appearing in the thousands or millions in a
rain swept area. Drivers will have to be mindful of the roads during these
times as the frogs recklessly journey across the pavement in migration to their
watery mating grounds, often those in which they themselves were born. The following day a return visit to the pools
morphs into a lively spectacle, complete with a cacophony of sound that
resembles a mix begin the quacking of a flock of ducks and the buzzing of a bee
hive—the mating call produced by the males.
Wood frogs.
Wood frogs are able to make a speedy exit from their
winter hibernation locales. Rarely do they burrow into the earth more than a
few inches. They frequently lie just below the leaf litter in a zone that
offers protection from the physical elements, such as snow, harsh winter winds,
and predators, but doesn’t quite ensure adequate insulation from the
penetrating cold. The frigid weather that would easily kill most amphibian
species doesn’t seem to bother the wood frogs—their bodies are actually capable
of freezing solid during the winter and thawing out in the spring, the result
of special proteins that keep cells from being damaged by ice crystals.
Wood frogs in amplexus.
Each female lays about 1,000 eggs, all congealed into one
solid jelly-like mass that is usually attached to some sort of aquatic
vegetation or detritus. The black dots seen within the cluster are individual
eggs, which, within a month, will hatch and morph into tadpoles. Egg masses are rarely solitary; normally all
females of the pond group them together in only one or two areas, forming vast
clusters, or aggregates that can be quite thick, reaching from the bottom of
the pool to the surface. As the weather warms, algal blooms within the ephemeral
pool usually adhere to and coat the eggs, making the floating mats resemble
pond scum. This is a rudimentary cloaking device that keeps the eggs hidden from
sight, and ensures the slimy, green masses remain an unsavory meal choice for
any animal that can peer through the deception.
Wood frog egg masses.
If all goes well and the pools remain filled with water,
within two months the diminutive fish-like tadpoles will fully transform into
terrestrial adults. Once mature, they will exit their natal ponds and join
their parents in the forest until the following spring, when the end of winter
rains gently nudge them out of their hiding places and encourage the frogs to
take part in the cyclical vernal migration.
Wood frogs may be the most visible species to utilize
ephemeral pools, but they are far from the only ones that rely on them for
breeding. Numerous salamander and newt species, decked out with vibrant colors and
abstract mottling also journey to these places to mate. Spotted, blue-spotted, tiger,
marbled, and redback salamanders with their aptly descriptive names can be
found in these localized pools for a brief duration. The red-spotted newts, the plebian dwellers of these environs, are usually the only amphibian species aside from the frogs that are somewhat easily viewed. Most of their salamander cousins are rather elusive
and are rarely seen, with their eggs being the only trace giving hint of their
presence. Each species’ egg mass differs in shape, coloration, and number of
eggs contained within. Identifying species by egg clusters alone is normally
how biologists are able determine the amount of biodiversity within a given
area.
Red-spotted newt.
Along with frogs and salamanders, the occasional turtle can
be seen roaming about the pools before they dry up; various aquatic insects plying
the surface and some traversing the depths swarm throughout; and the fairy
shrimp, a crustacean similar to “sea-monkeys” (brine shrimp) know of no other
home. In short, these pools though small and transient occupy a significant
niche in the landscape. The size of these water bodies, however, often leads to
their demise. Individuals who lack a knowledge of the importance of ephemeral
pools too often view them as nothing more than mosquito breeding grounds. They
fail to get close enough to them in body and mindset to witness the beauty and
biologically rich array of life within, and thus, frequently set out to rid
their property of these bits of so-called swampland. Unless unusually
significant in some way, most pools garner no legal protection, being well
under the required wetland size of 12.4 acres (5 hectacres) to qualify for
protective status in New York. Ephemeral pools, as their name suggests, may be
just that—ephemeral—as they are quickly vanishing from our forests, a result of
continued sprawl and apathetic attitudes towards the environment.
Sunday, March 9, 2014
Aerial Acrobatics: The Odonates
Dragonflies and damselfies, also known as odonates, are
truly remarkable creatures. Apart from their often impressive physical characteristics
and vibrancy, these small insects dazzle in the sky with their aerial
acrobatics. They have the required finesse to hover over an object while
scanning their surroundings in all directions, then alight with their tiny appendages
on even the narrowest of vegetation with a gracefulness seen nowhere else in
the insect kingdom, and a second later, if the site doesn’t meet their requirements,
take to the sky again at lightning speed and be out of eye sight before you can
even blink. If that isn’t enough, they also have the innate ability to fly
backwards, as each wing is capable of moving independently. In short, odonates have evolved into something special, and unlike
many of their contemporaries have been this way for quite some time. These
organisms are incredibly ancient and have hardly changed over the 300 million
years that have elapsed since their original emergence. This lack of alteration
only further demonstrates their exceptional efficiency, as they need not be further
refined by the forces of evolution—they’re already at their peak.
In southern New York State alone there are approximately 128
dragonfly and 55 damselfly species. The Hudson Valley is inundated with numerous
common varieties, along with harboring several rarer species. The high
diversity is bolstered by the large estuary that runs through the heart of the
region. The Hudson River provides crucial habitat to some species which require
the optimal conditions that are only dished out by water bodies that contain
brackish tidal marshes. The hardening of shorelines and the destruction of
marshes has led to vast declines in certain species and are now severely
restricted in distribution.
All odonates require being situated by water—mating,
ovipositing, and the larval stage of the life cycle are all dependent on it. Most
can make due in fresh water, and undoubtedly anyone that has passed by a lake
or swamp in the warmer months has seen countless dragonflies basking in the sun
on reeds or skimming over the water and taping it gently at regular intervals
like a stone being skipped across the surface. The latter sight is when an
odonate is deposting its eggs; each tap is one being released into the water.
When these eggs eventually hatch they enter into the naiad (named after Greek
water nymphs) or larval stage of their lifecycle. They hardly resemble their
adult counterparts, being green-brown or dark brown, with varying degrees of
mottling, so not to stand out in their watery environs where they could easily
be devoured by fish. They also have a comparatively frightening appearance,
resembling something more akin to an underground grub than an organism that will
eventually take to the sky. At this
stage they are entirely aquatic. They also are carnivorous, feeding on other
insects and possibly even small fish at times. Some naiads will remain below
the surface for up to 6 years.
After numerous molts of the exoskeleton (sometimes up to 15),
each time the naiad getting progressively larger in the process, it’s time for
the creature to emerge to the surface and begin its life as a dragonfly or
damselfly. Upon making it to dry land the odonate’s exoskeleton is still
relatively soft and the adult generally must take it easy for a week until it
successfully hardens. During this time the individual will normally recuperate
in the woods or in an isolated field or glade until it is ready to partake in the
rigors of the mating process. Males will frequently compete with one another in
duels for the opportunity to claim the right to mate with females of their claimed
territories.
Best Spots to View
The Mid-Hudson Valley, and more particularly, the undeveloped
Hudson Highlands, contains numerous favorable locations for odonates to thrive
in. In these sheltered and protected areas rare varieties which have been
pushed out elsewhere live in relative peace and thrive among the lush
vegetation and salubrious aquatic environs.
Iona Island Marsh
Common Sneezeweed, Marsh Mallow, and Cardinal Flower
In Bear Mountain State Park in the southern tier of the
Highlands two particularly unique species can be found. On the eastern flank of the park lies Iona
Island. This rocky citadel holds dozens of different odonates which buzz past
your head in copious quantities, similarly to a swarm on gnats on a humid
summer’s day. Among the congregation is
the bright orange Needham’s skimmer. This species inhabits the brackish marshes
surrounding the island, and individuals are often spotted clinging to some of
the ubiquitous reeds of the invasive phragmites.
These creatures are found in only a handful of counties in lower New York.
Orange County is the farthest north they have been documented in the state.
Intermixed with the Needham population is the deceptively similar looking golden-winged
skimmer. From a distance it’s often difficult to tell the two apart.
Needham's Skimmer
Golden-winged Skimmer
Just west of Iona Island lies the Doodletown Brook which
penetrates the narrow vales between Bear and West Mountains. This moderately
sized brook flows through land once occupied by a thriving town, but was completely
abandoned upon creation of the park in the 1960’s, a result of eminent domain.
It’s now essentially a bona fide ghost town, complete with crumbling
foundations, subsiding roads, and forgotten cemeteries two hundred years old
that are gradually being engulfed by the looming forest. Along the dark openings
next to the Doodletown Brook, the primeval looking gray petaltails dart about
in minute quantities. As the name suggests, this species is rather mundane in
appearance, not exhibiting some of its kin’s vibrant color schemes. However, gray
petailtails are unique among all other dragonflies in the eastern half of the
country in that their larvae are not completely aquatic. Instead, they tend to
reside in moist mud beds, living amid low lying vegetation that’s only fed by
minor trickles of water from an adjacent stream or spring. Only 11 locations within New York are known to
harbor this distinctive species.
Doodletown Brook
Farther north, in Orange County, just outside the bounds of the Highlands, the russet-tipped clubtail lives along beaches that line the Hudson near the Moodna Creek area. Uncommon, but not exceptionally rare, these creatures prefer to spend their time along mudflats usually containing freshwater. They’re frequently documented inhabiting inland lakes and streams, but seem to be situated along tidal rivers more commonly. Their large, vivid green-blue eyes and puffed russet colored abdomens makes this an impressive species to identify. The moderately bulkier black-tipped darners also line the shores here, decked out in varying tones of aquamarine.
Russet-tipped Clubtail
Black-tipped Darner
Also lying west of the Hudson, Sterling Forest State Park
has a dramatic odonate display. A prime spot for a view is around Sterling
Lake. The 3 mile long loop path that circumnavigates the sizeable water body
passes through forest along the way that’s some of the wildest in the region.
Dense stands of hemlocks border the lake and flow into the depths of the
surrounding mountains as if applied by a painter drawing his brush quickly
across a matte canvas with broad and hurried strokes. Growing among, and atop,
some of the larger glacial erratics that litter the ground in vast boulder
fields are gnarled bushes of mountain laurel that provide the forest with a
thick and impenetrable understory, moderately mixed with low bush blueberries. Both
the eastern and western sides of the lake are flanked by steep, rocky slopes
that abruptly rise from the water’s edge; to the north a shallow and weedy
inlet contains the traces of lively beaver activity. The more mundane southern
outlet has a noisy whitewater stream that always keeps the stones bordering it damp
and cool, with its continual mists and relentless sputtering that only abates
with the harshest of droughts.
Sterling Lake
In the swampy northern portion of the lake many fluvial
shrubs grow along the sandy shoreline. It’s in this location the largest
gathering of odonates present themselves. On a sweet pepperbush one may see a
slaty or widow skimmer resting itself, basking next to the white flower spikes
that appear in the early days of summer, each swaying in the air like a twitching
squirrel’s tail. Or, looking into a weed covered cove see the insects zoom just
above the waterline, taking the occasional break on a slimy, hole-ridden lily
pad.
Slaty Skimmer
Juvenile Widow Skimmer
Now casting your eyes onto the bright yellow sand dozens of
lancet clubtails relax themselves on the beaches, resting as intently as a
fatigued and over-worked vactioner. Their orb-like eyes are of an especially
rare blue, and look as if chunks of turquoise. With their bodies matching the
color of the substrate, these turquoise gems are the only part that stand out
among the golden sands. In several of the stony pockets near the banks,
individuals defend their gravelly kingdoms from invaders, taking to the sky to
duel and once chasing away their would-be usurper, quickly descend again to the
beach in a fluid, almost spiral motion as though they’ve been gently blown by
the wind. Their ability to return to the exact same spot, however, just
demonstrates their graceful and apparently effortless skills. They’re the
figure skaters of the air.
Lancet Clubtail
Autumn Meadowhawk
Stewart State Forest in northern Orange County contains another
diverse assortment of odonates. About half of the 6,700 acre preserve contains
wetlands or moist areas perfect for the establishment of abundant populations.
This property was originally purchased to be included as part of the nearby
Stewart International Airport. In 1982, the area was converted into parkland
when plans to make the airport host supersonic travel fell through and the
large buffer zone necessary for noise abatement was no longer needed.
Swamp in Stewart
Most of the property was residential in the past, evinced by
the many crumbling roads and foundations still extant throughout. There are
around 18 miles of road, although now only passable on foot. The land still
serves utilitarian uses, however. A police shooting range exists in the western
portion and is used quite frequently. New York State also allows local farmers
to cultivate some 400 acres with wheat and corn.
Along some of the shallow ponds and swamps there are broad
meadows consisting of tall grasses and numerous weedy and invasive flowers,
comprising such plants as golden rod, purple loosestrife, asters, and the ever-ubiquitous
dandelion. In most cases, these meadows were purposely created, and continue to
be mowed on a regular basis in order to provide an additional type of habitat
for the park. Apart from the odonates which prowl through these areas, the land
is rich in butterflies, wasps, and even the occasional moth seen during the
light of day, such as the odd, but impressive looking hummingbird moth. While
walking through the high grass one may even come across a bird’s nest
constructed from the same material in which it rests.
Hummingbird Moth Visiting Purple Loosestrife
Unlike their larger cousins, the damselflies exhibit a much
daintier and reserved demeanor, as their name aptly suggests. Frequently they
are seen placidly bouncing from spot to spot and not moving farther than
necessary. Rarely do they show the same level of agitation as the jittery
dragonflies that grow restless at the least bit of disturbance. A resting
damselfly is likely to move if approached, but probably not more than a few
feet at a time, just enough to feel comfortable that harm has been avoided. They
don’t like to make a fuss and draw attention to themselves—they’re much more
covert and drama-free.
Familiar Bluet
Ebony Jewelwing
A unique class of damselflies known as spreadwings, inhabit
the wet environs of Stewart. While a vast majority of damselfies fold their
wings together neatly behind their backs, as a shopper would their hands while
examining the contents of some glass case in a ritzy store, these bold
creatures have their wings fully extended while at rest, in intimation of the
dragonflies. The metallic green-gray swamp spreadwing could well pose as the
models of the odonate world. With their tooth-pick thin abdomens and their
seemingly weightless bodies they would be a perfect fit for the job. While
supporting themselves on some scrap of vegetation with their diminutive
appendages, all as slender as an eyelash, it looks wholly effortless, as though
they’re buoyed by water, gravity never having latched on to these creatures.
Their wings are beautifully wrought, with delicate geometrical lattices stretched
throughout to the max, giving a firm support, reminiscent of a tennis racket
weave. Each structure looks as though threaded from spider thread, but of a
grade and fineness superseding anything an arachnid could produce. The
exquisite needle-work is something only Nature herself could tenderly sew.
Swamp Spreadwing
In the tall grass and shub-filled fields the Halloween
pennants unshyly come into view and show off their beautifully stained calico
wings. The shine and glassy reflections from each brings to mind the ethereal
windows of a European cathedral, especially when the light filters through. Each
pane is softened and warmed by the light; the cold stiffness melts away and life
is breathed into the slumbering scene. Like biblical depictions that embolden religious
piety when illuminated seemingly by the grace of God, so too, does each spotted
wing restore our faith in the land, showing that the wilderness holds an airy
paintbrush and is far more refined than the dim brute we too often imagine. The
pennant’s entire body is a work of art, meticulously sculpted and painted. The
symmetry of form and outline alone amazes.
Halloween Pennant
***
Most who are acquainted with watching the sky for wildlife
are accustomed to the sights and sounds coming solely from the avian variety,
paying little notice to the diverse world of the odonates. While lacking the
delightful calls that birds superbly deliver, dragonflies and damselflies
impress in other ways. Often, their vivid color scheme, usually as rich and
fresh as those reflected from a transient summer rainbow, emblazon the sky like
parade ribbons twirled in the air in rhythmic fashion. Their subtle and indistinct
motions leave interpretation of this mesmerizing show open to the viewer, where
one may at anytime simply wander over to a lake or stream to see a
tranquilizing encore.
Friday, February 21, 2014
Ice Caves of the Shawangunk Ridge
Here's an article I recently wrote for TrailGroove that deals with the Ellenville Ice Caves at Sam's Point.
http://www.trailgroove.com/issue13.html?autoflip=57
Monday, February 17, 2014
Dark Sky Movement
In most parts of this restless country, the night sky is now
overwhelmingly dull, a once black gulf studded with brilliant stars obscured by
a whitish glare from the lights of the cities and suburbs. Even away from
bustling population centers where it’s hard to find a lone streetlight, a look
to the horizon reveals a pervading yellowish glow, with orange undertones
discretely intermixed. If it wasn’t for us knowing what time it was, we would
swear this light was arising from the sun, the very first tinges of the dawn.
It’s remarkable how intense this light can be on such large a scale that it
would mimic the sun to an extent. And yet it does. Only the moon and the
brightest of stars pierce through our light pollution, leaving some of the most
splendid constellations and the auroral hue of the Milky Way to remain hidden
in the dark, behind the veil we throw over them.
We have tackled air and water pollution, as well as
addressing a myriad of other disastrous environmental problems, and yet the
issue of light pollution has been left untouched for the most part. Granted, compared
to other problems this is of a lesser magnitude, but now that these other
situations are greatly improving, our sights should be set on the sky and
finally attempt to fix a problem that has gone unmitigated since the dawn of
the industrial era.
The first time I really ever gave any thought to the matter
of light pollution took place several years ago while backpacking a section of
the Appalachian Trail that passes through Bear Mountain State Park in New
York’s Hudson Valley. I started my trip in Connecticut heading southbound. And
up until reaching the Hudson, most of the shelters I passed and slept in for a
night had an ample canopy overhead cloaking the heavens, and as a result, I didn’t
spend a whole lot of time trying to stargaze. When I did attempt to get a
glimpse of the stars the view was seemingly satisfactory, being beyond the
worst of the light pollution. The quaint New England towns below the ridges and
mountains only threw minimal amounts of light into the atmosphere. Looking back
on it now, the conditions were far from optimal, but they weren’t so poor as to
alert me that something wasn’t quite right. This all drastically changed upon a
stay at the West Mountain Shelter.
Built in 1928—making it one of the oldest shelters on the
AT—this structure is situated on the southern summit of West Mountain, providing
dramatic views to hikers of the Hudson River and Highlands during the day, and
at night, front row seats to the crisply illuminated New York City skyline. In
many ways the view from the shelter is all the more remarkable during the
night. I was thoroughly impressed,
snapping numerous photos of the unusual scene, enraptured to be see a vibrant
and lively New York from atop an airy mountain 30 miles north. You vaguely felt
as if you were close enough to descend into the action. It was the best of both
worlds to a hiker tiring of the monotonous forest green.
After the hours passed and the scene became more ordinary, I
couldn’t help but notice how it was barely possible to distinguish any stars in
the sky, despite being perfectly clear out. The light was flooding everything
and the beauty of it was wearing off quickly, devolving merely into a harsh
whitewash. New York’s motto “Excelsior,” or “Ever Upward,” took on a whole new
meaning.
A month later, while on another trip, this time in the woods
of northern New Hampshire at the base of the titanic Mount Washington, I would
see for the first time what a truly dark sky devoid of any extraneous light
looked like. I arrived in the state just before 1:00 am on a balmy August night
accompanied by three close friends. Such a late arrival was due a work conflict
that resulted in us not being able to leave home (New York) until the early
evening. Our excitement to hike a northern segment of the trail bolstered our
decision to leave that day instead of postponing our departure until the
following morning.
Exhausted upon reaching the trailhead parking lot near the
Great Gulf in Gorham NH, we briefly considered just sleeping in our vehicle
that night, but cramped conditions for the past 7 or so hours led us to reconsider.
In the midnight darkness we fumbled around for our gear. It was almost
impossible to see anything without the aid of a flashlight, the moon being
absent from the clear sky.
It felt like an eternity trying to find a place to pitch our
tent in the profuse vegetation. The northern states certainly have some of the
thickest woods around, comprised almost entirely of conifers and birches, which
sprout nearly as close together as corn stalks in a farm field. The additional
ubiquitous jumbled rocks, hummocks of sedges and tall ferns, and decaying limbs
strewn everywhere made finding a comfortable spot nearly impossible, especially
in the black of the forest.
After choosing the best spot we could find and getting
everything set up, I was strangely filled with energy. Not desiring to be
further confined in my tent just yet, I followed the trail back to the parking
lot to search for an item I had forgotten in the trunk. Once reaching the
opening in the forest afforded by the spacious lot, the Orion constellation
overhead caught my eye, this being the only star cluster beside the Dippers
that I could identify. It was expansive; much more so than I ever realized
before. Each star, especially those of his belt, looked like fixed gems set in
an expensive piece of jewelry, sparkling and shining resonantly—they no longer
resembled blurry dabs of paint on a wall, but rather morphed into something
firm and tangible. No matter where I turned my head the sky was populated with
these countless golden orbs in full relief, some remaining static, others
pulsating to a minor degree, and a select few noticeably twinkling, reminiscent
of the show exhibited by fireflies, with each light nearly being extinguished
and then quickly coming back with full and undiminished vigor. We often hear of
the “twinkling of the stars,” and frequently use it in common vernacular, but very
few are acquainted with the concept and know the actual sight. It’s vastly impressive.
When the sky has a true, primeval darkness, such as the one
that was towering over me in the isolated section of New Hampshire wilderness,
the entire sky, like a cosmic map, seems to unfold; the Milky Way now visible
points the way into the interior, far wilder and remote than the perceptions of
the American West of the past—the stars no longer faint appear close; the
universe overhead deepens. We grow small and insecure beneath it, realizing the
mote of cosmic dust that we reside on is nothing more than flake of snow in the
celestial blizzard above. This haphazard display of intertwined lights and shadows,
though filled with chaos and uncertainty is remarkably peaceful—every roving
question and unfilled desire drops away the instant your gaze takes hold of
this fluid, eternal artwork.
***
The sky-glow emitted from residences and industry doesn’t
solely impact our view of the heavens, but also negatively affects terrestrial and
aquatic ecosystems. Many organisms become disoriented and display unusual
behavior upon finding themselves inundated by an unusual degree of night-time
light. A prime example which everyone has undoubtedly witnessed when an
artificial light is turned on is the flurry of frenzied insects that descend
upon it, uncontrollably bombarding the light source. Apart from the physical
harm, their schedules are upset, so that feeding and mating opportunities may
be missed. Migrating birds are also drawn to the light and may impact high-rise
buildings—countless birds perish every year as a result. Additionally, some
amphibian species navigate to breeding sites by the light of the moon and
stars. An exceptionally bright sky makes finding these almost impossible. Physiological
injury may also be wrought: retinal damage, reduced fertility, and other homeostatic
upsets are all possible outcomes to creatures that are highly sensitive to changes
in their environment.
While the sky will never again be completely free of light
pollution, it is possible to significantly reduce the quantity that makes it
into the atmosphere with relative ease. The simplest method is obviously to
turn unnecessary lights off when not in use. It doesn’t take a lot of effort to
make a large difference. We must ask ourselves whether we really need to
illuminate every street corner and front stoop in America. Is such a level of
illumination really necessary? I don’t
think it is. It seems like we’re still somewhat afraid of the dark.
Aging light fixtures can also be replaced with more
contemporary designs that are capped with a shield-like enclosure. This ensures
that light shines directly onto the targeted feature while blocking extraneous
light from spreading above and sideways. Altering the components of the light
source can also be beneficial. By making the bulbs exude a more natural light,
harsh glare can be reduced which often is reflected and amplified in the sky;
lower watt bulbs can be substituted as well. Furthermore, municipalities have
the ability to enact regulations to aid the effort.
Certainly, there is no shortage of mitigation techniques available
to reduce our “lumen footprint.” When we cut down on light pollution we also
save energy and money in the process, further benefiting the environment (and
our wallets). There’s no reason why we shouldn't begin implementing these
simple, yet effective changes today.
Often we take the mundane for granted, never realizing what
a refreshment even the simplest piece of nature can bring about. In the spring,
for example, the dandelion makes a prolific appearance in our freshly greened
lawns, popping up randomly in cheery abundance, much to the consternation of
homeowners, who easily tire of this bright weed, mainly due to its widespread
nature, which lends to it being disregarded as anything of significance. The
stars of the firmament have the same plight. If only we looked at them
differently and recognized their inherent beauty regardless of their commonness,
then perhaps we would be more inclined to preserve the element they reside in.
As Ralph Waldo Emerson sagely noted: “If the stars should appear one night in a
thousand years, how would men believe and adore; and preserve for many
generations the remembrance of the city of God which had been shown! But every
night come out these envoys of beauty, and light the universe with their
admonishing smile.”
Saturday, January 25, 2014
The Great Bat Decline: A Story of the White Nose Fungus
There’s nothing more pleasant at the conclusion of a summer
day than to sit outside until dusk taking in the sights of nature, seeing the
life around you change as the light grows dim and the surroundings take on a
more melancholy and foreboding appearance. Such a time is perfect for
contemplation of the day’s events, but also to witness the creatures of the
night awaken, and realize how truly restless and robust this planet is—life is.
As we turn in for the night, we hand over the baton to the next set of creatures
that will continue this ceaseless relay race that isn’t set to the schedule of the
sun, but rather has its outlines only nebulously bound in the depths of
eternity. The hoot or screech of the owl, the mournful wails of the whip-poor-will,
and the epileptic flutter of the bats in shadowy outline against the rapidly
darkening sky always excited my imagination and was cause for inspiration,
undoubtedly setting the stage for vivid dreams to come.
However of late, the composition of these nocturnal creatures
has been swiftly changing. Though the owls and whip-poor-wills still hold in
relatively the same numbers, the bats—the only mammal apart from humans that
has truly mastered flight—are becoming increasingly absent from the skies,
dying in the millions. Now when I sit outside at night trying to admire what I
can that remains, I have to fend off vast swarms of mosquitoes, biting flies,
and numerous other annoying insects that love to harass man and are no longer
kept in check by those aerial predators. The time that I now devote to being
outside at twilight is diminishing every year as bat numbers further plummet,
insect levels spike, and my stress from both increases.
It’s hard to believe that all these interrelated problems are
the result of a simple fungus— a dull and obscure one at that—but still the
cause of the deadly White Nose Syndrome.
Pseudogymnoascus destructans, the white
nose fungus responsible for the mass die offs, first appeared in the U.S. in
upstate New York during the early months of 2006. Since then it has spread
throughout the entirety of the northeast and has been detected south to
Alabama. As of now it doesn’t appear to have crossed the Mississippi. While there
is debate as to its origin, it appears as though the fungus was transported to
the U.S. from Europe, as related bats there are also infected with it, although
most seem to have built up a resistance.
The fungus receives its name from its tendency to grow on the snouts of
bats, forming a small white patch that looks like a pinch of snow. It’s
damaging in the fact that the pathogen rouses bats from their hibernation
early, depleting their fat reserves, and ultimately causing them to starve to
death.
Fungi, in many cases, can be just as detrimental as even the most
virulent of viruses. Take, for example, the plight of the once ubiquitous
American chestnut tree. At the start of the 20th Century, this
species was perhaps the most common tree in eastern North America, comprising a
quarter of deciduous forests. Some
ancient specimens achieved truly gargantuan proportions, the trunks being nearly
10 feet thick and rising well over a hundred feet into the air. That is, until
another non-native fungus was accidentally introduced into the country, also,
as it happens, via New York. Within
several decades after its release into the wild, nearly every tree on the continent
was eliminated—over 99% of the population felled by spores, a multitude of
sizes smaller than a grain of sand. And so the same cycle has begun with our
bats, and is only in the earliest of stages. Unlike viral or bacterial
contagion that usually cannot survive outside its host for any significant
length of time, fungi are perfectly suited to endure the harsh environment and
be distributed vast distances on the wings of the wind, or perhaps, on the sole
of a human boot.
The Palisades Interstate Park League of Naturalists (PIPLON) has seen
firsthand how serious this decline has been. In early January members conduct
an annual wildlife count within Bear Mountain and Harriman State Parks. These
large and wild swaths of protected land on the western side of the Hudson
Highlands, historically have been the most diverse habitat in southeastern New
York, home to both rare and adrenaline inducing organisms. While still holding
many unique species in its depths, every year that passes by, so too, does time
drag away with it something of biological importance, leaving the land tamer
and less productive.
During each wildlife count an inventory of bats is undertaken in an
abandoned mine in Harriman State Park. Cranberry Mine, which actually wasn’t
dug by those seeking ore deposits, was constructed in the early part of the
last century to serve as a storage locale for dynamite that was being used in
projects to help with park construction, such as the numerous roads that allow
access to some of the more secreted lakes and other scenes of natural splendor
that would otherwise be hidden from most of the public. Burrowed into the rock, about a quarter of the
way up a gently sloping mountain, the mine is hidden from a casual glance at a
distance by a layer of oaks, that while aren’t overly dense, are exceedingly
tall, so that the eye is drawn to them and must trace the outlines of each from
the bottom to the topmost spire. It’s an ingenious cloaking device. Everything
just seems to blend together and flow naturally, as water cascading down a
waterfall. These ethereal looking trees, in conjunction with the rock of the
mountain that bows at the base, forming an amphitheater-like enclosure, creates
a wilderness cathedral. On a small knoll, a pew of this holy place, is where
those of the past chose to sink their mine into the billion year old bedrock. Not
until you reach the summit of this rise can you make out the entrance, which is
cleverly hidden from sight by being behind the knoll and dug in perpendicular
to the mountain, so that one on a head on approach to the amphitheater must
shift to the left to get a full glimpse of the opening, once lined up to it.
Apart from it being situated to exclude discovery by accident, its
perpendicular setting was probably created to provide a buffer to the nearby
Seven Lakes Drive. If, for some reason, the stored dynamite was ever to
detonate, instead of debris being hurled directly at the road, it would instead
fly parallel to it. Older dynamite could be a highly volatile substance. Many
brands of the time were essentially constituted of nitroglycerin mixed with
some type of absorbent material such as diatomaceous earth or sawdust to make
the product more stable. As the dynamite ages, the sticks may “sweat” and
crystals of pure nitroglycerin may form on the outside. Even a minor jolt or shock
to these crystals can result in a massive explosion. Today in some cases, the
nitroglycerin is being substituted by more stable explosive elements for safer
handling.
Cranberry Mine at its lengthiest point is around 200 feet long. At a
distance of about 50-60 feet in, the mine bifurcates, each leading section then
becoming much more rugged, no longer having an even floor, and the ceiling
contracts, so that you now must be conscious of every move to ensure you don’t
accidentally hit your head on the jagged rock above. The passage on the left-hand
side is the smallest of the two in all respects, and resembles much more a
natural cave than it does a man-made structure. On the floor, at the end of the
tunnel, are hundreds of dried fecal pellets of the Alleghany woodrat that are
at a bare minimum 30 years old. This species has been extirpated from this part
of the state for many years, dying off as a result from infection by raccoon
pathogens. The sole population that still resides within the state can be found
in the Palisades near the New Jersey border. The only visible traces here of
the bats that have succumbed to the fungus is the occasional slender wing bone,
each narrower than a toothpick, more resembling fish bones than anything else. The
bats which drop to the floor are quickly removed from the mine by roving scavengers,
such as the aforementioned raccoons.
The longer passage to the right, once you make it past the bifurcation,
quickly begins ascending, with a small rivulet running down the floor, making
the trek up somewhat slippery and dangerous. The farther you penetrate into the
earth, the wetter and steamier it becomes so that staying here for any length of
time will result in a thorough soaking from the omnipotent drops of water
plunging from the ceiling. It’s hard to imagine any bats wanting to hibernate
in this portion of the mine, and yet, in a very moist segment of the ceiling we
find a single little brown bat (Myotis lucifugus) clenching tightly to
the rock, visibly covered in water droplets. The wings surrounding the body
seem to act as a rudimentary rain coat. Perhaps this tiny bat resides here for
the warmth, regardless of the dampness. It must be noted that mines provide a much
more equable environment than in the open and capricious air outside. Year
round the temperatures remain about the same. In the winter it stays well above
freezing, while in summer provides refreshing relief from the oft-times
overbearing heat.
Scattered in various clusters throughout the entirety of the mine we
discover isolated pockets of the big brown bat (Eptesicus fuscus). In
certain nooks there are 2 or perhaps 3 bats nestled together, grouped so
closely it’s difficult to determine where one ends and another begins. It’s simple
to see how the fungus spreads easily with the bats so compacted. The occasional
loner is also present, unable to find a compatriot in this roomy cavern. Prior to
the fungus’ entry here, every survey turned up hundreds of individuals
comprising several species. On this January day 7 big brown bats and a single
little brown bat were recorded, giving us a grand total of 2 species and a mere
8 individuals. This precipitous decline is depressing to witness as you walk
around where there were once a multitude of slumbering mammals overhead forming
furry, brown blankets— now all you see is the cold, damp, and dismal rock, with
the addition of the occasional cave cricket hiding in the crevices of the lower
ledges, adding to the sense of loneliness and desolation.
This is just one cave of many that has experienced the punch that the
white nose fungus delivers indiscriminately.
To help lessen the spread to the few locales not yet contaminated, it’s
important to stay out of sites that bats like to frequent, such as their
favored caves and mines. As mentioned earlier the spores of the fungus can
easily hitch a ride on clothing and shoes. While bat numbers will undoubtedly continue
to fall for quite some time and certain previously rare species may
unfortunately pass into the history pages, unable to recoup their losses, it is
hoped that like their European counterparts, many will develop a resistance to
the fungus and make a rebound. We haven’t lost them entirely just yet.
Saturday, January 11, 2014
The Original A.T. Shelters
Approximately 12,000 years ago as the last of the glaciers
made their final retreat northward as the weather warmed, causing them to
rapidly melt, the ancestors of the Lenape tribe made their way into the land
that now comprises New Jersey, New York, and parts of Pennsylvania and
Connecticut. The first landscape was a barren tundra, resembling those now
found in the northern reaches of Canada and Alaska. Caribou, mastodon, and even
the occasional mammoth roamed the land, serving as prey for the newly arrived
people. Few trees existed. Large boulders strewn across the landscape, known as
glacial erratics, and overhanging rock ledges on the sides of mountains were
all that existed to shelter the Lenape from the frigid, arctic-like weather. As
the climate improved over the millenia, tundra gave way to spruce and birch
forests, and from there, to a forest similar to the one we know today comprised
of oaks, hickories, maples, and other well known species.
The bare and gray background developed into a lush, forested
landscape. Trees towered over the once all important “rockshelters.” Though
wigwams and longhouses were now being constructed from the ubiquitous
vegetation, these simple, craggy structures were still being utilized by Native
Americans. A lone hunter deep in the woods tracking his quarry for miles might
spend a night beneath an overhang afforded by a massive boulder to avoid the
wind of a cool fall night or perhaps to escape the drenching rain of a summer
thunderstorm. Additionally, these places were also frequented by larger groups
as they migrated. These people moved seasonally from site to site to be in a
better position to collect newly ripening plants or to make it to a certain
spot in time to find arriving game animals or spawning fish. They might move to
a grove of mast producing species to collect the nuts of oaks, hickories, or
chestnuts, of which they were especially fond. And in the spring they might
traverse the land to encamp near a stream or tributary of the Delaware or
Hudson River to trap the herring that swim up them to spawn. Their lives were
variable and subject to the capricious whims of the environment, but the rockshelters
were the one solid constant that could always be relied upon when they needed
protection from the elements.
Many of these once occupied rockshelters can still be seen
along portions of the A.T. today, even in some of the highest and most
seemingly inaccessible locations. As such, thru-hikers and Natives of the past
seem to share a few similarities. Apart from visiting these remote spots, both
have known the pain of lugging a tremendous amount of weight around for lengthy
distances—the hiker, a 30 pound pack on his back; a Lenape native, a recently
shot deer carcass that had to be dragged back to camp, or maybe a pack-like
bundle that contained the camp itself
and needed transportation to a seasonal locale that could only be accessed by crossing
over a steep mountain range or two. Each
has also witnessed the beauty of the forest, of nature itself, and has
reverenced the mysteries that are contained within. Though separated by
centuries they share a common uniting force—the rocky land of the Appalachians.
Every day a hiker makes his way through the Mid-Atlantic States
he passes by a multitude of sites used by the Lenape, although few recognize
them. Many see stone, but nothing more.
The cultural aspects of the land are just as important as its ecology or
natural history.
Many rockshelters
appear as though they would be the perfect spot to encamp; others are smaller
or more covert and their tales are only told by the archaeological record. The
occasional open air campsite can also be found on flat terraces near streams
and lakes, as are larger village sites.
Right around the creation of the Appalachian Trail in the
1920’s, archaeologists began seriously investigating the land that exists
within the bounds of Harriman and Bear Mountain State Parks in New York. It was
a boon time for excavations and for the documentation of new sites. Many of the
artifacts pulled from these digs made their way into the historical museum at
Trailside Museums and Zoo, located directly adjacent to the Bear Mountain
Bridge. Trailside was envisioned by Benton MacKaye, who wanted a nature center
such as this placed at regular intervals along the A.T. This is the only one
that actually came into being, unfortunately.
Despite what many people might think, Native Americans, in
most cases, actually ate quite well. We can tell this was true by examining the
bones, shells, and to a lesser extent, carbonized remains of organic material
left behind in rockshelters. Due to the acidic nature of northeastern soil,
many faunal remains will not generally survive more than a few centuries. If
sequestered within a rockshelter these artifacts may remain in better shape and
survive longer than they would in an open air campsite. A majority of surviving organic items pulled
from these structures in New Jersey and southern New York date back to the Late
Woodland period (1,000-400 years ago). These people consumed a wide array of
animals, many of which are now extinct or extirpated from the region, such as passenger
pigeons, Alleghany woodrats, mountain lions, and even bison (their historical
range extended to the western side of the Hudson River). They further
supplemented their diet with deer, turkey, beaver, bear, and shellfish that used
to exist in copious quantities in the upper reaches of the Hudson and Delaware
Rivers that routinely were as large as an outstretched hand. The Natives
certainly appear to have eaten better than some hikers do today.
Next time you’re on the trail I would definitely recommend
taking a few minutes to examine a rockshelter or two, especially the larger
ones. It’s no secret that the NYNJ Trail Conference purposely routes numerous
trails so that they pass by the most interesting rock formations. Usually a shelter is among them. While many look shabby today and are infested
with myriads of insects and have a dense leaf strewn floor, in prehistoric
times, if these sites were used for more than a few days at a time, the
appearance would be significantly different.
Let’s say for example, two people, a man and a woman, are occupying
a shelter for several days 1,000 years ago. If we were to look inside we would
find that the ground is swept of leaves and a fur garment is covering the dirt
floor to ensure a warm and congenial feel; the man is just outside butchering
an animal. When his task is complete he hands a clump of meat over to the woman
who promptly begins cooking it over the fire that’s constructed under the rock
eave. By her side in the rockshelter, sitting on the ground, stands a couple small,
decorated clay pots filled with water collected from a nearby stream that will
be utilized for a variety of tasks. When night settles in the two move closer
to the fire for added warmth and light. As they lightly converse the man does
some minor tool repair. Shortly after he finishes up, the two fall asleep
wrapped in blankets of thick deer and bear hides. The fire slowly wanes and all
is enveloped in darkness, with only the occasional yelp of a coyote sounding in
the distance.
You have to look past
the dreary mess in the shelters today and imagine how it once was.
The Cats Rock Rockshelter in Pawling, NY would have fitted a
pair of Natives comfortably like the ones just described. This very large
glacial erratic, on par with the size of a small house, is situated on a steep
mountain slope just north of the Telephone Pioneer lean-to. Its ample overhang would have ensured great
comfort, and ease when walking around.
These sites are fragile so it’s best to tread lightly.
There’s nothing worse than to see an archeological site contaminated with
modern debris—it really does diminish the ambiance of it. While this shelter is
a prime example of what Natives would seek out for a night’s rest, this
particular site is moderately degraded by the buildup of trash and through use
by rock climbers.
The Lenape viewed this world differently than most of us now
see it. Everything, living and non-living, was imbibed with a spirit, even the
cold and prosaic rock beneath our feet. Mankind was but a single puzzle piece
to this world. All deserved respect. The last remaining Lenape today hold the
rockshelters and other sites utilized by their ancestors to be sacred.
When it comes to sacred sites, some were revered more highly
than others. Waterfalls were especially meaningful to the Lenape and many would
travel far out of their way to reach one to pray or conduct ceremonies. The
same could be said with certain overlooks atop hills or mountains that afforded
sweeping views of the landscape that kindled their connection to the
divine. Every bit of the land was
precious, but especially the stone, which they used for shelter, made tools out
of, along with stone bowls and ceramic pots, not to mention use as a canvas—the
occasional petroglyph can be found etched into bedrock outcroppings. Though
they no longer frequent the rockshelters or tread the valleys and peaks of the
Appalachians, the land is still looked after and maintained by like minded
beings—A.T. hikers that see there is more to the land than just the value of
natural resources it contains.
Michael Adamovic is an avid A.T. hiker and serves as a site steward at several state parks in southern New York as part of the Native American Site Steward Program (NASSP). He holds a Bachelor's degree in Environmental Studies from Manhattanville College.
This article will be appearing in the July 2014 issue of A.T. Journeys.
Michael Adamovic is an avid A.T. hiker and serves as a site steward at several state parks in southern New York as part of the Native American Site Steward Program (NASSP). He holds a Bachelor's degree in Environmental Studies from Manhattanville College.
This article will be appearing in the July 2014 issue of A.T. Journeys.
Subscribe to:
Posts (Atom)