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Science and Technology Daily, Beijing, February 7 (Reporter Zhang Mengran) A microbiological study recently published in the British journal "Nature Communications" showed that a higher energy metabolism rate enables a microbial population to live more than 1,000 meters below the seabed.
in sediments at 120°C
.
The findings help shed light on the survival strategies of organisms at the highest temperatures thought to be sustainable for life
Microorganisms are a large group of organisms including bacteria, viruses, fungi, and some small protists and microscopic algae
.
Microbes are extremely tiny and hard to see with the naked eye, but they are closely related to humans
On the other hand, the marine sediments below the surface are believed to contain a large part of the microorganisms on the earth and are the focus of research in related fields
.
A previous international expedition drilled sediment cores in the subduction zone of the South China Sea Trough to study what extreme life could be in this habitat
Building on previous research, UCLA scientist Tina Trued and colleagues conducted sensitive radiotracer experiments under highly sterile operating conditions to see how these microbes survived in these sediments down
.
They found that microbes living in deep, hot sediments had extremely high energy metabolism rates, in stark contrast to slow-metabolizing microbes previously found on the deep ocean floor
.
The researchers believe that this microbial population must maintain a high metabolic rate in this extreme environment to provide the energy they need to repair cell damage caused by high temperature, and the heating of organic matter in the sediment provides them with abundant nutrients.
substance
The researchers believe their findings have important implications for our understanding of the sediment environment below the surface and the maximum temperatures at which life can exist
