Which earth organisms could survive on Venus?

Which existing life on earth is best suited for the Martian environment?

In the German Aerospace Center there is a chamber that is supposed to imitate the Martian environment. So far there are two published experiments that show that some organisms could survive in the chamber. An imitation of the Mars regolith was used and the organisms were exposed to an imitation of the Martian atmosphere with the pressure, temperature range, humidity fluctuations and solar radiation of Mars.

In the first test, alpine and polar lichens succeeded in increasing photosynthesis in this environment within 34 days - if only they had a reduced radiation dose that was similar to that in cracks and depressions of the regolith. Samples exposed to full doses of radiation simply survived. Some cyanobacteria also survived.

In the second test, after the first day of exposure, a black yeast species recovered from an initial dive of metabolic activity to normal levels after a full week. A second fungus, a microcolonial variety, survived but struggled.

Note: The test chamber does not mimic Mars' gravity or the cosmic rays that would appear on the surface of Mars. This may lead to distortion.

Mikey

How do they deal with the effects of harmful radiation and limited sunlight? I'm not challenging your answer, just really curious. I suspect lichens, of course, have experienced limited sunlight.

Kim Halter

@Mikey - I've gotten around to expanding the answer now - which ultimately required an almost complete rewrite.