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Study shows mountain treelines are rising due to climate crisis

by admineconai August 19, 2023
written by admineconai August 19, 2023
938

A new study, undertaken by Scientists from the Southern University of Science and Technology in Shenzhen, China, has found that Mountain treelines are rising in response to the climate crisis.

To carry out the study, the scientists used remote sensing to map the highest points of patches of tree coverage on mountains. They found that 70% of mountain treelines had moved uphill between 2000 and 2010.

They found that on average, treelines moved upwards by 1.2 metres (4ft) a year, but the shift was greatest in tropical regions, with an average increase in elevation of 3.1 metres a year – and in all regions they found the rate of change was accelerating.

In total, the researchers tracked almost 1m km (620,000 miles) of treeline across 243 mountain regions around the world.

They found that treelines sometimes move in response to human activities such as changes to land use. However, in this study the researchers focused on closed-loop mountain treelines, which encircle the very tops of mountains and are mostly isolated from human activities.

Also, they researchers found that the treelines still moved, which demonstrates that they are sensitive to changes to climate beyond human influence.

Read also: Report: Switzerland is installing solar panels in train tracks

It is not clear what the consequences of treeline movement will be. Rising temperatures will enhance growth above the level of the current treeline: more trees mean more carbon will be removed from the atmosphere. It could also expand the habitats of some forest species.

However, upward movement of treelines reduces the area of tundra, which puts alpine species at risk of extinction and may affect water supply to areas that rely on it.

“Mountain treelines are important indicators of the impact of climate change on upland ecosystems,” the researchers wrote in the journal Global Change Biology. “Our work … has important implications for biodiversity, natural resources, and ecosystem adaptation in a changing climate.”

Story was adapted from the Guardian.

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