Existing comment:
Pioneers:
Have you noticed the multi-colored splotches on the rocks? Look closely -- they are not part of the rock, but tiny plants called lichens (sounds like "like-ens"). Only lichens and mosses can survive on bare rock. Lichens slowly corrode the rock surface thus providing anchorage for other plants. Mats of moss catch windblown and waterborne dust. Then, as insects and plants die, organic material is added. Almost imperceptibly, the creation of soil begins.
Just as human pioneers pushing west to settle the land provided opportunities for those who followed, these plant pioneers set a dynamic stage for plant and animal communities. In this process called succession, each new species to take hold contributes to soil formation and enrichment. Subtle changes provide suitable habitat for a greater diversity of species. Greater diversity equals greater stability. Could this be true for human communities as well?
The final stage of succession here at Black Canyon is the mature pinyon/pine juniper forest you see around you. |