(s) Students will be able to describe several relationships between living things at Craters. Students will be able to trace the flow of energy through a food web. Background John Muir said, "When we try to pick anything out by itself, we find it hitched to everything else in the universe." For example, lichens accelerate the erosion of rock and tree trunks on which they grow, enriching nearby soil and improving growing conditions for syringa. Syringa creates shade and further enriches the soil when it dies and is decomposed by wind-dispersed fungi and bacteria. A host of insects colonize the