Question

Which of the following processes will be most adversely affected if microorganisms are removed from forest ecosystem?

• A. Solar energy fixation and nutrient cycling
• B. Decomposition of organic matter and photosynthesis
• C. Nitrogen fixation and decomposition of organic matter
• D. Carbon assimilation and nitrogen fixation

Answer 1

Answer: (C)

Nitrogen fixation and decomposition of organic matter

Nitrogen fixation is the process of fixing atmospheric nitrogen with the help of microorganisms. The atmospheric nitrogen is made available to the plant for its use. Decomposition is the process of breaking down organic matter into simpler form. This process is carried by microorganisms. Hence, if microorganisms are removed from forest system, nitrogen fixation and decomposition of organic matter will be adversely affected.

Thus, the correct answer is 'Nitrogen fixation and decomposition of organic matter.'