Different between the following terms by giving sustainable examples in about 120 words (a) primary succession and secondary succession. (b).direct and indirect use value of biodiversity
Answers
Answer:
Primary succession
It is a kind of ecological succession which occurs from the barren, uninhabited and unoccupied areas, such as the newly formed pond, rock, dunes, etc.
It occurs in a barren area
In the beginning, the environment is unfavorable.
Absence of any previous community.
Time taken for the completion of the process is 1000 years or more.
Secondary succession
It occurs in an area where there was the existence of life previously but got abandoned due to natural disturbances, such as flood, tsunami, earthquake, etc.
It happens in an area, which has been recently got deprived of life and was previously inhabited.
The environment is favorable, since the beginning.
Presence of the previous community use to live in that area.
Time taken for the completion of the process is around 50-200 years.