Ecosystem

Short answer type

1. Why producers are also named transducers?

2. How deep in sea , producers are present?

3. What are biogenetic nutrients?

4. Define a sere?

5. Which species can be named as dominant species?

Short answer type

1. Name the edaphic factors of an ecosystem?

2. What is ecological efficiency? Explain its significance?

3. What is detritus food chain? give an example?

4. Differentiate between a detritus and decomposer giving example of each?

5. List features that make a stable biological community?

Short answer type

1. What is primary productivity? Give the range pf primary productivity in different ecosystem of the world?

2. Write a note on pyramid of numbers?

3. What is ecological succession on bare rock called ? Name the first and the last but one succession stages in it. Explain how the climax community gets established in this succession?

4. How does succession differ in terrestrial and aquatic systems ? Give silent points?

5. Why are herbivores considered similar to predators in the ecological context? Explain.

Long answer type

1. Give an account of energy flow in an ecosystem?

2. Write a note on food web?

3. Describe the process of succession in a water body?

4. Describe how do oxygen and chemical composition of detritus control decomposition?

5. Healthy ecosystems are base of wide range of ecosystem services. justify?