Nature's Complexity: Can Wolves Be Absent From The Environment?
What if you
knew that a manager of a nature reserve full of deer and pets decided to
simulate the ecosystem and send to the reserve a pack of predatory wolves?
Do you
believe that his decision is vainness and destruction of a secure and peaceful
life?
Another
question! ….
What if we
removed predators or disgusting insects from life, won’t the world be nicer?
How far
does the presence or absence of a living creature –even if it was undesired-
affect the overall biological system?
What happened in Yellowstone?!
In 1995,
the wolves
were reintroduced to Yellowstone Park in the U.S. after their absence for
seventy years from the park. Although the pack of wolves was small, its
existence led to dramatic changes in almost everything concerning this reserve!
At first,
the herding behavior of herbivorous animals changed, as they started avoiding
valleys and open areas. Which led to the regrowth of trees and plants largely.
In
addition, after Yellowstone had almost turned into a desert and lacked life manifestations,
it reverted to be covered with green areas.
It is time
for the next fluctuation!
After the
growth of trees that have been multiplied five times in only six years, birds
began to re-exist and build nests. Beavers also returned to build dams on
rivers. Reptiles, amphibians, falcons, and eagles also pre-existed
consequently.
Moreover,
as the growth of plants and trees fixes the soil and prevents its erosion,
rivers changed their course.
Wolves…
these that seemed as absolute evil, its existence
appeared to result in so much goodness!
Wolves were
one of the factors that preserve the balance of the whole ecological and
geographical system, that if it hadn’t been made in such complexity and
obscurity, we probably wouldn’t have noticed this fine-tune in it.
Trophic Cascade
The
powerful indirect interactions that control the ecosystem, are referred to as a
trophic cascade. This term was applied to that phenomenon because of the
imbalance of the ecosystem caused by our interference in it by removing a
living organism from it or by damaging a natural factor, is similar to a
waterfall racing down in a series of cascades, every downfall is followed by
another downfall till it reaches the bottom.
That is
exactly what happened on the coasts of the pacific ocean when the anglers saw
the sea otter with its precious fur and decided to densely hunt it until it was
almost extinct…
Will you
believe me if I told you that the absence of this luxurious animal would cause
an ecological and geographical issue for the entire area?
Seems
strange, isn’t it? Just a furry animal living most of its life lying on its
back in the water and continuously eating sea urchins and starfish.
However,
with its absence, the sea urchins have greatly increased which caused the
complete destruction of kelp forests that shelters a huge variety of marine
organisms.
The
destructed forests have been absorbing a large amount of carbon dioxide present
in the atmosphere, which its accumulation leads to life suffocation, global
warming, and climate change.
The annual
carbon absorption level through kelp forests has decreased after the absence of
sea otters- from forty-three billion kg to only thirteen billion kg.
What is interesting about trophic cascades is... that it does not only occur from the top-down but also from the bottom up.
The absence
of either the head or the tail of the food chain will lead to the same result.
For
example,
what do you think would happen if disgusting cockroaches are absent from life?
Cockroaches
feed on decomposed organic substances that trap nitrogen; it digests it and
releases nitrogen in their feces so it could return to the soil.
With
cockroaches’ absence, the nitrogen cycle imbalances. This nitrogen plays a
vital role in the growth of plants and insects that feed on plants and
contribute to their fertilization.
Slight
changes in plant characteristics such as the length and density of the grass or
nitrogen concentration are followed by a complete change in the inhabitants of
the area from insects and animals.
It's hard
to believe that the sea otter or the ugly cockroaches preserve life as we know
it, but it's another truth about this magnificent world and pre-destined
nature!
The tragedy of the Commons
Imagine
there is a public pasture open for all herders to have their cattle graze with
no limits.
Now, everyone should add the largest possible number of cattle to make the
utmost gain and save the cost of buying feed for his cattle.
However,
any pasture has a capacity, which if was surpassed, plants would not be able to
complete their life cycle, hence leading to the destruction of the pasture and
the loss of everyone.
Yet, if one
herder wanted to maintain the pasture and prioritize others over himself by
buying feed for his cattle, this would not stop the tragedy, because others
would keep adding more cattle. Then he would lose twice, one when he stopped
adding more cattle and another when the pasture is consumed and everyone loses.
The perfect
action, according to the materialistic benefit/loss standard, would be
selfishness; by adding more cattle from everyone, until the free pasture is
consumed even until all free pastures are consumed!
This
important phenomenon is called the Tragedy of the Commons, which means that
competing for common resources shall lead to their destruction and the loss of
all competitors.
Do you know
what's strange about it?
That common
resources characterize life in general, however, it's not that much of a
tragedy!
The
non-tragic tragedy of the commons shows you that there is a higher power
managing and controlling everything in this system which can never be
self-managed according to the benefit/loss principle directing the members of
this system.
Old Maids' Cats
Darwin! The
well-known biologist and the developer of the most famous theory, has written
in his book (The Origin of Species) something about this correlation between
living creatures and environmental balance.
As he
noticed a relationship between the increase of cats of his neighbors and the
flourish of clover flowers!
He explained this by saying that cats kill mice hence they decrease, and since mice tamper with beehives, then the decrease in mice shall lead to an increase in bees, and the increase of bees shall lead to more pollination of plants, so flowers would flourish and the harvest would increase as well.
Then Thomas
Huxley, his loyal student, began to dwell on that and to promote it
politically, saying that old unmarried women always raise cats, which
eventually leads to the increase of clover harvest, so cattle would graze more
efficiently, leading to providing more meat for the soldiers in the British
army which contributes to the glory of the British kingdom.
So, the
cats of old maids lead to a powerful army and kingdom!
Thus, the
supporters of the theory of evolution have marketed it claiming that we can organize the laws of nature which control and explain the phenomena of
life, and of course, we can then harness these laws for our own benefit and
development.
It took
humans other decades to realize that it wasn't that simple and that the
connections among living creatures within the biological system are
substantially crucial, and it affects the existence of all kinds of life and
even the weather and geography.
Life is a strict fussily made system!
As we saw
with the trophic cascades and the tragedy of the commons, interfering in the
system by adding or taking away a living creature, may lead to the destruction
of the whole system, including the increased species itself.
Also, if we
assumed that the mechanisms of evolution -like the random sabotaging mutations
which constantly manipulate nature- extend back to millions of years, then this
life shall reach an inevitable end, that is the impossibility of the existence
of persistence of life or the whole biological system.
Can this
ultimate precision and perfect calculations be explained by anything but the
fact that this fussily balanced world as if it's standing on the edge of a
knife, and this vast rich life with known components?
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