Understanding What a Lichen Is
A lichen is a partnership between a fungus and an alga or a type of bacteria. Together, they form a single organism that can survive in tough environments.
How Lichens Work
The fungus provides structure and protection, while the alga or bacteria produces food through photosynthesis. This teamwork helps both partners survive.
Where Lichens Grow
Lichens grow on rocks, tree bark, soil, and even rooftops. They thrive in places where many plants cannot survive, including deserts, mountains, and cold climates.
Different Types of Lichens
There are crusty lichens that cling tightly to surfaces, leafy lichens that spread out like foliage, and shrubby lichens that grow upward or hang like branches.
Why Lichens Matter
Lichens help break down rocks into soil, provide food for animals, and are indicators of air quality because they are sensitive to pollution.
How Lichens Reproduce
Lichens can reproduce by releasing spores or by breaking off small pieces that grow into new lichens when they land in the right place.
The Simple Takeaway
A lichen is a partnership organism made of fungus and algae living together. They are tough, widespread, and important for ecosystems around the world.