Which statement accurately describes ecological succession?
1. The lack of animals in an altered ecosystem speeds up the process of natural succession.
2. Abrupt changes in an ecosystem only result from human activities.
3. After a major disaster, stable ecosystems can never become established again.
4. An abrupt change in an ecosystem can lead to a long-term gradual change.
1. The lack of animals in an altered ecosystem speeds up the process of natural succession.
2. Abrupt changes in an ecosystem only result from human activities.
3. After a major disaster, stable ecosystems can never become established again.
4. An abrupt change in an ecosystem can lead to a long-term gradual change.