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Jeddah - Yasmine El Tohamy - RIYADH: The King Abdullah University of Science and Technology, in collaboration with scientists from the Swiss Federal Technology Institute of Lausanne, has conducted an unprecedented, in-depth study on microbiomes — microorganisms that live symbiotically with humans or other organisms — in glacier-fed streams.
These streams, originating from glaciers atop the Earth’s highest mountains, harbor a wealth of unique microorganisms.
The research team collected and analyzed samples from 170 glacier-fed streams over five years across regions including New Zealand, the Himalayas, the Russian Caucasus, the Tien Shan and Pamir Mountains, the European Alps, the Scandinavian Alps, Greenland, Alaska, the Rwenzori Mountains in Uganda, and the Ecuadorian and Chilean Andes, the Saudi Press Agency reported.
The findings, published in the renowned scientific journal Nature, represent the first global reference for microbiomes in glacier-fed streams.
These streams, which are among the most extreme natural freshwater ecosystems in the world, are located at mountain summits and are characterized by near-freezing temperatures and low nutrient levels.
They also serve as the origin for many of the world’s largest rivers, functioning as vital water reservoirs for the planet.
KAUST researcher Dr. Ramona Marasco emphasized that glacier-fed streams were highly vulnerable to climate change.
She spoke of the importance of establishing a baseline for their microbiomes to better understand the rate of ecological change, while highlighting KAUST’s extensive genetic sequencing efforts, which have significantly contributed to creating a comprehensive picture of these endangered microbiomes.
The researchers successfully developed the first global atlas of microorganisms in glacier-fed streams.
Their work revealed that these streams harbor a unique microbiome distinct from other cryospheric systems, such as glaciers, frozen soils, and ice-covered lakes.
About half of the bacterial species in these streams are endemic to specific mountain ranges. The scientists attribute this phenomenon to the geographical isolation of mountain ranges, similar to islands, and to the powerful natural selection exerted by the harsh conditions in glacier-fed streams.
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