Bacteria have been found surviving in the extreme conditions of a crater lake in an active volcano in Costa Rica, which may mimic conditions of ancient lakes on Mars
To characterise Laguna Caliente’s microbiology, Wang and his team analysed the DNA of microorganisms found in samples of lake fluid, clumps of sulphur and sediment in 2013 and 2017.
The researchers found that the samples had a remarkably low biodiversity compared with most ecosystems on Earth. The microorganisms were mostly bacteria from the genus“We either expected to find nothing at all because this [environment] was so extreme or to find multiple organisms because that’s how most microorganisms live with each other,” says Wang. “They rely on each other in very symbiotic interactions.
at the University of Edinburgh in the UK. “Even if these environments were habitable, we may never know whether they were actually inhabited unless they produced fossils of some kind.”
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