Succsession

Question 1

What is succession ?

Answer 1

The change in an ecological community over time

Question 2

What primary succession?

Answer 2

1. Pioneer species colonising bare rock/sand
2. Pioneer species adapted to survive in harsh abiotic factors
3. Through their death-decomposition change abiotic factors-becomes less harsh-forms thin layer of soil & humus
4. Mosses and smaller plants now survive-increase the depth of nutrients in soil
5. Environment becomes less sustainable for previous species
6. Climax community-trees dominated

Question 3

What secondary succession?

Answer 3

1. Succession is disrupted & plants destroyed
2. Succession starts again
3. Soil is already created-does not need to start from bare rock serval stage