Lichens Start Soil by Breaking Down Rock

A rock can look lifeless, yet a tiny living front line may be at work on its surface. Lichens are tough partnerships between fungi and algae. They can cling to the barest places and make the first move toward life.\n\nThat grip brings both chemical and physical weathering. Lichens can release acid-like compounds that dissolve minerals, and they can wedge into cracks to break rock apart. The resulting dust mixed with organic leftovers forms the earliest soil-like layer.\n\nIn detail, this starter layer can later support mosses, grasses, and eventually larger plants. A lichen patch is the opening scene of ecological succession. The road from rock to forest can begin with an organism the size of a stain.\n\nNoticing lichens also changes your sense of time in nature. They are invisible to eyes that demand quick results, but foundations often form slowly. The pattern on a rock may be the soil of the future.