Question
- What is meant by ecological succession? How does it occur? Explain.
- Differentiate between Primary and Secondary succession.
✓
Answer
- The gradual and fairly predictable change in the species composition of a given area = 1. During succession some species colonise an area and their populations become more numerous, where as population of other species decline and even disappear = 1 + 1 = 2.
| | Primary Succession | Secondary Succession |
| 1. | It occurs in an area which has been bare from the beginning. | It occurs in an area which has been denuded recently. |
| 2. | Soil is absent at the time of beginning of primary succession. | Soil is present in the area where secondary succession begins. |
| 3. | Takes a long time for completion. | Takes less time for completion. |
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