Yes! That! What a wonderful idea. I would like to see similar research projects applied to lichens. You might find it interesting to read up on the development of an ecosystem on Surtsey, a volcanic island that emerged from the sea in relatively recent times, and now supports a small but growing ecology. It started as a lump of cooling lava in the middle of a cold, wild ocean, and now has life. As is usually the case, the lichens were first in and created a substrate on which everything else could grow. Lichens would be wonderful as a terraforming tool for marginal planets, and they have so many uses!
Color me an optimist, but I would like to think that a planet that looks
anywhere near Surtsey - i.e., surface water, Earth-like temperatures, a sun providing the energy for that and an ecosystem-to-be, an atmosphere already carrying some of said energy (in the shape of easy-to-breathe oxygen) to the land, and most of that for nothing less than the last couple
Ga - would not
need terraforming but rather something the
PPO would like to think some more about.
A planet that still needs to have its oxygen broken out of whatever molecules it's "stored" in, possibly forming new atmospheric layers to alter the temperatures of those below, now
that's terraforming! (And about as far beyond our current reach as any extrasolar planets we might want to apply it to, of course.)
(I "watched"
The Titan a couple days ago. Dear script writer, the temperature on Titan is almost
200 K below Earth's. It doesn't matter whether your genetically engineered transhumans meant to skinny-walk (and skinny-soar) on that moon stop
feeling the cold, it's about avoiding that
the very materials their bodies consist of turn rock solid!)