Q. With respect to ecology, which of the following statement is/are not correct?
1. A Plagioclimax community is an area or habitat in which the influences of humans have prevented the ecosystem from developing further.
2. Deflected succession is when the natural succession would continue if the arresting factors are removed.
3. If interferences are removed and succession to the original climax community is no longer possible is termed as arrested succession.
Select the correct answer using the codes given below:
Answer: B
Notes:
Plagioclimax Vegetation:
- A Plagioclimax community is an area or habitat in which the influences of humans have prevented the ecosystem from developing further.
- The ecosystem may have been stopped from reaching its full climatic climax or deflected towards a different climax by activities (arresting factors) such as: jhuming cultivation, large scale afforestation, overgrazing, etc.
- In each case, human activity has led to a community that is not the climax community expected in such an area.
It is of two types:
- Arrested succession: The natural succession would continue if the arresting factors are removed. Ex. If cultivation is stopped in Gangetic plains and Great Plains of USA, normal sere of vegetation succession will start.
- Deflected succession: Even if the interferences are removed, succession to the original climax community is no longer possible. Ex. Shola forest (Nilgiris), Sahara Desert, Thar Desert, etc.
Source: ForumIAS
