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Name___________________________________Date________________Period____ Succession in Ecosystems Guided Reading 1. What is a community in an ecosystem? 2. What is succession? 3. The two main types of succession are ____________________and _______________. 4. What is primary succession? 5. In primary succession, soil must first form the rock surface. The first species to populate an area in primary succession are called ____________. They help to break up the rock and form soil. Examples of these species are _____________________________ and mosses. 6. The series of changes that occur after a disturbance in an existing ecosystem is called ______________________________________________________. 7. The statements below describe areas where succession will occur. Identify each statement as either an example of primary or secondary succession. ___________________a. A new island formed by the eruption of an undersea volcano. ___________________b. A clearing in a forest left by cutting down the trees. ___________________c. An area without any trees or other plants following a forest fire. ___________________d. An area of bare rock uncovered by melting ice as a glacier recedes.