sentences:  This grove has some of the tallest and oldest trees in the Henry Cowell Redwoods State Park, because the environment has been preserved to maintain a natural ecology.Undergrowth is never cleared, there is no logging allowed and deadfalls and lightning-struck trees are allowed to proceed naturally with their processes, unless they impair access to the grove.This rich, biotic environment is filled with natural nutrients which make up for the massive amounts of waterfall which might otherwise deplete the soil.