Question

Following changes occur during the successive seral stages of ecological succession EXCEPT _______

• A. change in the diversity of species of organism.
• B. decrease in total biomass.
• C. increase in total biomass.
• D. increase in the number of species and organisms.

Hint:

During succession, biomass generally increases.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept
During successive seral stages the community becomes more complex and stable.

Step 2: Changes seen
Species diversity changes, total biomass increases, and the number of species and organisms increases.

Step 3: Compare the options
A decrease in total biomass does not occur, so it is the exception.

Final Answer:
Decrease in total biomass is the exception. \[ \boxed{\text{(B) }\text{decrease in total biomass.}} \]