|
Written by Administrator
|
|
August 05, 2008 |
|
|
|
Read more...
|
|
|
Written by Administrator
|
|
August 28, 2008 |
Consider the lowly frog.
Its approximately 4600 different species cover most of the globe. No
frogs in Antarctica, but there are species such as the Wood Frog that
live in the Arctic, hiding underground and surviving a partial freezing
of its body to endure the winter. Frogs are successful in marshlands
and ponds, desert and savanna, in the trees and on the forest floor.
Having evolved during the Devonian Period (360-415 million years ago),
frogs and their amphibian family are older than the human species and
very successful, yet their numbers have been on a precipitous decline
over the last few decades.
Frogs are often considered an indicator species, the animal we should
look to when we wonder how healthy a given ecosystem currently is and
has been. Why look to the slimy, squishy frog? That sliminess is part
of the reason, a product of the frog’s respiratory system that pulls
air directly through its skin, bypassing the protective barriers a
nose, mouth, and lungs provide. Through their skin, frogs are directly
exposed to the pesticides, hormones, fertilizer, heavy metals, and
other contaminants we have piled into our shared world. Increased UV
exposure and changes in temperature we have created weaken their immune
systems and alter their breeding habits and reproductive success rates.
We steal away their habitat, introduce invasive species that crowd them
out or eat them up, and we capture them in excessive numbers for use in
our laboratories and pet shops.
Why do we keep track of
the frog? Because 168 of their species have been driven to extinction
over the past several decades, and nearly half of the remaining species
have faced declining numbers over that same period (at normal, historic
rates of extinction, one lost frog species over those same decades
would have been conceivable, at the utmost). Even in heavily protected,
vast national parks and forests where human threats are kept as distant
as possible, frog numbers are plummeting. Our actions affect them even
at the greatest distances. We keep an eye on frogs because they are
sensitive, they will be the first to go as our planet becomes
uninhabitable—they are already being kicked out the door at the end of
the same tunnel we humans are walking down.
Speaking of tunnels, you
might think of frogs as the canary in the coal mine. Do you know this
anecdote? Miners of the past (and likely many still in the present-day)
would carry along a small cage housing a canary in their descent into
deep mine shafts. The birds have a swift, sensitive metabolism that
makes them very susceptible to changes in the environment. Thus, they
were able to detect the presence of methane and carbon monoxide when
those two gases built up under natural processes in the working mines.
The canaries would fall down or die in the presence of these gases,
just before the men themselves would be affected, giving the miners
time to escape to the surface and allow the tunnels to be flushed with
clean air.
Maybe we can imagine the
entire planet as a mine of a sort, and frogs our canaries singing a
song of peril into the twilight. Yet if that is all as we have said,
there is one problem with our analogy. There is no escaping this
mineshaft we’ve dug ourselves down into.
We don’t encourage or
even tolerate hopelessness here at Frog King. There are things that can
be done, to save the frogs and us as well. However, there is no
elevator to climb into, headed for clean air. Our only choice is to
clean up the mine itself, scrub the air clean, and give all the world
and its many species another chance at survival.
Consider Costa Rica,
where frog populations were found to have fallen 75% between 1970 and
2005. At first, scientists blamed the developing tragedy on a fungal
infection that has increasingly affected the amphibians. Global climate
changes have forced the vertebrates to climb higher in the rainforest,
to reach an elevation that offers their preferred temperature, a
climate they were accustomed to find previously at lower elevations.
Unfortunately, this climb also gave them a greater exposure to the
fungus and its deadly effects. All of this has been proven true.
However, at the same time lizards in the same rainforests have been
dying off at identical rates to the frogs. Here’s the kicker—the
lizards aren’t susceptible to the fungus. Obviously, something besides
the fungus is killing off the amphibians in Costa Rica, and the newest
candidate is a lack of leaf material on the forest floor. Increased
temperatures, invasive worms, and changes in rainfall have cleared the
ground of the leaf cover these species need to survive. In this
changing climate, the ground litter decays faster and trees aren’t
succeeding as well. Consequently, leaf litter is diminished on the
ground, denying the frogs food and shelter.
In the end, the
conclusion scientists are coming to over the decline in frogs – in
Costa Rica as throughout the world, even in expansive national forests
and other protected places – is that every little change affects the
amphibians. The massive changes we are making affect the frogs
massively. Cumulatively, all the small and large changes together are
making it incredibly difficult for their survival. It isn’t just any
one thing. The frogs are dying because of the sum and total of the
shortsighted things humans are doing to the world’s environment.
Why are we Frog King?
Because if every little change for the worse can hurt the world’s
frogs, despite that we never intended a single hurt to them, then every
little change we make for the better is bound to do all of us good,
especially if it is the Good we intend.
We are Frog King because
we would miss the frogs. We don’t want to be alone in the world,
couldn’t live without the oddly adorable frogs. In ways that we don’t
know and could hardly understand, we will not be the same without them,
and they are leaving us.
|
|
Read more...
|
|
|
