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Get Answers to all your Questions
(a) What is an ecological succession ?
(b) Differentiate between primary and secondary succession. Why is secondary succession faster than primary succession ? Explain with suitable examples.
(c) What are pioneer species ? Give examples of pioneer species in Xerarch and Hydrarch successions respectively.
Answers (1)
a) Ecological succession is the gradual and impartially predictable change in the species composition of a particular given area.
b)
|
Primary succession |
Secondary succession |
|
1. The area where no living organisms ever existed |
1. Areas that somehow lost all the living organisms that existed |
| 2. bare rock |
2. farmland |
| 3. newly created pond |
3. flooded field area |
Secondary succession is faster than primary succession because some soil or sediment is already present there. For eg. burnt / cut forests
c) Pioneer species are those species that invade a bare area means those species which are the first to colonize a barren environment.
Xerarch- lichens
Hydrarch- phytoplanktons
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