Soa Dunaliella in the Driest Desert of the World?

Researchersds ibed a species of dunaliela found on the walls of a cave in the ottakama desert of chile. So one of the driest places in the world. How would the alga be surviving? In a desert cave. While it's living on silk from spider web threads, which, you know, collects moisture from the fog in the air. And then it stays in the twilight transition zone of the cave, so it can still get some sunlight in order to do photo synthesis. This process of adaptation recapitulates the transition that lowed land colonization by primitive plants.