KAUST And EPFL Conduct Groundbreaking Study On Microbiomes In Glacier-Fed Streams

King Abdullah University of Science and Technology (KAUST), in partnership with the Swiss Federal Institute of Technology Lausanne (EPFL), has completed a groundbreaking study on microbiomes in glacier-fed streams. These streams, originating from glaciers on Earth's tallest mountains, host a diverse range of microorganisms. Over five years, researchers gathered samples from 170 streams across various regions, including New Zealand, the Himalayas, and the Andes.

The research findings were published in Nature, marking the first global reference for microbiomes in these unique ecosystems. Glacier-fed streams are among the most extreme freshwater environments, located at high altitudes with near-freezing temperatures and low nutrients. They also serve as crucial water sources for many major rivers worldwide.

The study revealed that glacier-fed streams possess a distinct microbiome compared to other cryospheric systems like glaciers and ice-covered lakes. Approximately half of the bacterial species found are endemic to specific mountain ranges. This uniqueness is attributed to geographical isolation and harsh environmental conditions.

Dr. Ramona Marasco from KAUST highlighted the vulnerability of these streams to climate change. Establishing a baseline for their microbiomes is essential for understanding ecological changes over time. KAUST's genetic sequencing efforts played a significant role in mapping these endangered microbiomes.

The researchers successfully created the first global atlas of microorganisms in glacier-fed streams. This comprehensive map provides valuable insights into how these ecosystems function and adapt to environmental pressures. The study underscores the importance of preserving these natural reservoirs amid changing climates.

Glacier-fed streams act as vital "water reservoirs" for our planet, feeding into some of the world's largest rivers. Their unique microbial communities are shaped by both isolation and natural selection due to extreme conditions. Understanding these dynamics is crucial for future conservation efforts.

This extensive research spanned multiple continents, including regions like Greenland, Alaska, and Uganda's Rwenzori Mountains. By analyzing samples from diverse locations, scientists gained a deeper understanding of how different factors influence microbial diversity in glacier-fed streams.

The collaboration between KAUST and EPFL has set a new standard for studying microbiomes in extreme environments. Their work not only enhances scientific knowledge but also highlights the urgent need to protect these fragile ecosystems from climate impacts.

With inputs from SPA