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NEST2016BiologyEcosystem

The diagram below shows the relationships among the midge larvae (Chaoborus nyblaei), larval salamander (Ambystoma tigrinum) and two species of the crustacean Daphnia (D. rosea and the larger D. pulex) that inhabit certain pond communities. Study the relationships and deduce which of the following is/are correct.

Options

  1. APresence of high numbers of larval salamander has an indirect effect on D . rosea and it is a positive effect.
  2. BWhen larval salamanders are present, predation reduces the population growth rate of the larger Daphnia, facil
  3. CThe two species of Daphnia compete for the same resources and hence increase in resource availability will red
  4. DIncrease in the number of D . pulex would lead to a decrease in the number of midge larvae.

Correct answer

D. Increase in the number of D . pulex would lead to a decrease in the number of midge larvae.

Step-by-step solution

No solution available.

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