This Title Explains What An Ecosystem Is And How The Plants And Animals Within An Ecosystem Rely On And Effect Its Existence. Different Types Of Ecosystems Are Described, As Well As The Food Webs Within Them. How Some Changes To An Ecosystem Can Be Good And How Some Harmful Changes Can Destroy Them. Teaches Students What An Important Role They Can Play In Keeping These Intricate Ecosystems Alive.

The purpose of the vegetation mapping effort at Valley Forge National Historical Park is twofold. First, a vegetation classification is developed to identify the types of vegetation within the park. The second purpose of the vegetation mapping effort is the production of a digital vegetation map.