What is a pioneer organism?

Scientists are after finding out pioneer organism. But they failed to identify a single pioneer organism.
They have tried to generate a computer model of simplest organism. This model organism should survive as its own. It should have energy source, membrane, DNA, RNA, should synthesize necessary structural and enzyme proteins. This organism should have a capacity of duplication.
This model organism shall be independent with only 800 genes.
Name of such model organism is ,
last unknown common ancestor.
After this scientists are after synthesis of common ancestor.

A pioneer species is a species that colonizes an area after a disturbance. Pioneer species are able to withstand and thrive in habitats that would be too barren or harsh for many other species. They typically have unique adaptations specifically for these environments and grow quickly. Pioneer species are the first species in ecological succession, and they contribute to soil formation by breaking down rock.

Lichens are a pioneer species. They are able to grow on bare rocks. Other examples include certain species of moss and grass.