Chile's distant paradise where scientists study climate change

Scientists study moss, lichen and fungi at the Omora Etnobotanical Park in Puerto Williams in order to observe the effects of cl
Scientists study moss, lichen and fungi at the Omora Etnobotanical Park in Puerto Williams in order to observe the effects of climate change.

Hidden inside pristine forests in Chile's deep south, known as the end of the world, lie potential early warning signs of climate change.

Puerto Williams on Navarino island, which is separated from the South American mainland by the Beagle Channel, is the world's southern-most town.

Far from the pollution that blights major urban and industrial centers, it is a paradise that provides unique conditions to study .

"There is nowhere else like it," Ricardo Rozzi, director of the Cape Horn International Center for global change studies and bio-cultural conservation in Puerto Williams, told AFP.

It is "a place that is especially sensitive to change" as do not rise above five degrees Celsius.

This cold and windy area is the last inhabited southern frontier before reaching the Antarctic.

The ethnobotanical Omora park is home to an immense variety of lichens, mosses and fungi that scientists study by crouching down onto their knees with magnifying glasses.

In the crystal clear Robalo river, minuscule organisms act as sentinels of the changes produced by global warming.

In both the park and river, the alarm bells are ringing.

Biologist Ricardo Rozzi, director of the Cape Horn International Center, says studying lichen and moss can help prevent the exti
Biologist Ricardo Rozzi, director of the Cape Horn International Center, says studying lichen and moss can help prevent the extinction of humanity.

Moss and lichen on the move

At this latitude—55 degrees south—climate change has an exponential effect on flora that react by seeking out , said Rozzi, 61.

"The most obvious aspect of climate change is the rising temperatures," he said.

"These lichens cannot survive" if a certain threshold is passed.

To escape the higher temperatures, they move.

"In the case of (mosses) we've noticed that they have moved. Before they were between 50 and 350 (meters above sea level) and now they are between 100 and 400," said Rozzi.

He says Omora has more diversity per square meter of lichens and mosses than anywhere else in the world.

They also help to absorb carbon dioxide.

Another aspect is the elevational diversity gradient, an ecological pattern in which biodiversity changes with elevation.

AN Amplified view of A 'miniature forest' formed by moss and lichen at the Omora Etnobotanical Park in Puerto Williams
AN Amplified view of A 'miniature forest' formed by moss and lichen at the Omora Etnobotanical Park in Puerto Williams.

The 700-meter high Bandera hill's biodiversity changes every 200 meters and there is a mammoth 1.5 degrees Celsius difference in temperature between top and bottom.

"We can see what changes happen in the and in the area close to the sea in a very short distance, and we can see how the temperature affects the biodiversity that lives in this river," Tamara Contador, 38, a biologist at the Cape Horn International Center, told AFP.

She studies the gradients themselves.

If the height difference between gradients rises or falls on the mountain, scientists can determine whether there has been a in temperature.

They say there has been.

Avoiding 'extermination'

"On a global level, the polar and subpolar ecosystems are the most affected by climate change, so we are in a place where has a much bigger effect on biodiversity than other places," said Contador.

River organisms also form part of the alert system.

A glacier over Darwin's mountain range visible from the Beagle Channel in the southern Magallanes region of Chile
A glacier over Darwin's mountain range visible from the Beagle Channel in the southern Magallanes region of Chile.

"The organisms that live here are also indicators of water quality and global environmental change," added Contador.

River organisms move about and have already increased their , says Rozzi. This confirms there has been a small change to the climate in the area that could have been much greater elsewhere on the planet.

"Some insects that have an annual eggs to larvae to adulthood cycle are now having two cycles because the has risen," said Rozzi.

By studying these organisms and learning from them "we can avoid crossing the threshold that brings us to the extermination of humanity and other life forms," he added.

© 2022 AFP

Citation: Chile's distant paradise where scientists study climate change (2022, October 4) retrieved 9 December 2022 from https://phys.org/news/2022-10-chile-distant-paradise-scientists-climate.html
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