IMPORTANT QUESTIONS FOR ECOSYSTEM

                                                                                ECOSYSTEMS

1.       How is a food web formed?

2.       What is stratification in a forest?

3.       Define standing crop? How is it measured?

4.       What is the importance of humus?

5.       Why is secondary succession faster than primary succession?

6.       Name the pioneers and climax of primary succession in water and on rocks.

7.       As succession proceeds the type and number of animals and decomposers also change.

8.       Define Ecological succession? What is SERE?

9.       What characteristic  features seen in Ecological succession?

10.   Why is there a restriction on tropic levels in a grazing food chain? Is there  such a limitation in the detritus food chain? Explain.

11.   Schematically show the flow of energy in a grazing food chain from the sun.

12.   Justify the statement succession and evolution would have been parallel  process at that time when life started on Earth.

13.   In general all pyramids are upright. Explain. What are the exceptions to this generalization?

14.   What are the limitations of Ecological pyramids?

15.   What are the producers in grassland and oceans. How is GPP different from NPP? Why is the productivity in oceans lesser than in land?

16.   Why is it reasonable to think that biodiversity should carry a hefty price tag? Justify.

17.   a)    Why are Carbon and Phosphorus essential to living organism?

b)    What are the natural reservoirs  of these elements and in what form?

c)    Give the important  differences between two cycles in nature?

18.    With a flow chart explain the process of decomposition. What factors affect this process Work as a unit to perform the function?

19.   Humans do a disservice to nature by creating a desert from a forest. Comment and say why should it be a cause of concern

20.   What is primary productivity? Why does it vary in different types of ecosystems?