The time it takes a community to recover from a disturbance and the degree to wh

Question

The time it takes a community to recover from a disturbance and the degree to which the new community resembles the pre-disturbance community both characterize...

Select one:

a. The resistance of the community

b. The disturbance frequency

c. The stability of the community

d. none of the above

Under top-down control of community structure, primary producers are more abundant in food chains with...

Select one:

a. an even number of trophic levels

b. an odd number of trophic levels

c. more than ten trophic levels

d. no light

Explanation / Answer

Answer

Option a is the right answer because resistance is a phenomenon of community or population to remain unchanged after disturbance. resistance is one of the major characterizes of ecological stability, and it has three fundamental properties e.g. returning to the pre-disturbance state after short disturbance, staying unchanged and persistence along time of an ecological system.

option b is the right answer because according to Lauri Oksanen top-down control of community structure, primary producers are more abundant in food chains with an odd number of trophic level but decrease the abundance of the producer in an even number of trophic level.

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