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| The Collins glacier on King George Island in the Antarctic has retreated in the last 10 years and shows signs of fragility |
A decade ago, a thick layer of ice covered the Collins Glacier on Antarctica's King George Island.
Now, the
rocky landscape is visible to the naked eye, in a region that is both a victim
of and a laboratory for climate change.
"I had
the opportunity to come here over a 15-year period, and even within a human's
lifetime, you can already see the changes brought about by climate
change," the director of the Chilean Antarctic Institute (INACH), Marcelo
Leppe, told AFP.
Observers
can now see "rocks that we weren't seeing five or 10 years ago, and that
is direct evidence of the shrinking of these glaciers and loss of mass,"
he said.
But even as
these melting glaciers worry the scientific world, the presence in Antarctica
of plants proving resistant to extreme conditions has also sparked hope for a
warming planet.
Chile is
one of some 20 countries with scientific bases on the cold continent. Its
Professor Julio Escudero complex on King George Island is where dozens of
researchers are measuring the effects of climate change on native flora and
fauna.
"We
need to quantify the change to predict what could happen in the near
future," Leppe said.
Blooming
algae
Measurements
taken last year by Chilean scientists on Doumer Island in Antarctica's Palmer
Archipelago showed water temperature had risen to 2.5 degrees Celsius (36.5
degrees Fahrenheit), up from its normal range of between 0 and 1.5 degrees. And
at a depth of 40 meters (130 feet), it was still at 2.0 degrees.
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Changes in
ice cover in the Antarctic between 2002 and 2016
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The warming
waters have attracted species previously unseen in the Antarctic, such as a
spider crab normally found south of Chile.
There is
also a blooming of green algae which is vital for the local ecosystem,
especially for crustaceans.
"Even
though they're really small, the algae and the micro-algae are really important
for balance in the food chain," said Nelson Valdivia, a professor at
Austral University of Chile.
"They
supply nutrients to the rest of the ecosystem, and we know that the number of
species in the same ecosystem is a very important factor in terms of it
remaining in good health."
But over a
longer term, this flourishing of algae could unsettle the ecological balance.
The worry
is "losing species that we don't even yet know exist," Valdivia said.
Scientists
also fear the effect of warmer temperatures on the rest of the world.
According
to NASA monitoring, between 2002 and 2016, Antarctica lost 125 gigatonnes of
ice per year, causing sea levels worldwide to rise by 0.35 millimeters
annually.
Antarctica
holds 62 percent of the planet's freshwater reserves, so the melting there
could have far-reaching consequences, not least by diminishing the salinity of
the seas, which could prove fatal for many marine species.
Adapting
plant life
However, the
white continent also may hold the key to plant and animal life adapting to
changing temperatures.
Already, Antarctic plants -- which are resistant to ultraviolet radiation and extreme conditions -- are being used in biotechnology to give us sun protection lotion, antioxidants and natural sugars.
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| A colony of young Gentoo penguins seen on Ardley Island, Antarctica, are among the many species being studied by scientists from Chile |
Already, Antarctic plants -- which are resistant to ultraviolet radiation and extreme conditions -- are being used in biotechnology to give us sun protection lotion, antioxidants and natural sugars.
To survive
the rigorous conditions, vegetation here hoards sugar to survive the harsh
winter months buried under the snow.
In some
mini-greenhouses, Marisol Pizarro, a biotechnology researcher from the University
of Santiago, studies how Antarctic plants react to temperatures artificially
raised by one or two degrees Celsius.
Her finding
is that mosses survive the change quite well -- an advantage that could serve
other vegetation in the future.
"We
could transfer a gene linked to this tolerance for dry conditions to a common
plant, such as lettuce or rice, to give that plant the ability to tolerate
drought," she said.
"As a
result, it would be less affected by the adverse, unfavorable conditions due to
diminished water in its environment," she said.
With
Antarctica being one of the fastest-warming regions on Earth, the scientists
here are working against the clock.
Those from
Chile are conducting around 100 projects ranging from genetic observations in
penguins, to how solar activity influences the polar environment, to comparing
indigenous mollusks with those in South America.
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