Why do lichens come out on rainy days and disappear after the sun shines?

Evaporation. Lichen, also known as Nostoc commune and Nostoc commune, is a combination of algae and fungi. Fungi that appear on unpolluted mountains or rocks after heavy rain disappear after the sun comes out. This is evaporation. Auricularia auricula has a strong vitality, and it can quickly absorb water and expand after rain. Auricularia auricula is rich in resources in China, widely distributed throughout the country, and can be found in many places.