Answer:
1- Decrease in alligator and anhingas populations (tertiary consumer)
2- Overgrow of everglade crayfish population (primary consumer)
3- Decrease in plants and algae population (producers)
Explanation:
The trophic web is the process of energy transference through a series of organisms, in which every organism feeds on the preceding one and becomes food for the next one. The first link is an autotroph organism or producer, such as a vegetable, that can synthesize organic matter from inorganic matter. The next links are the consumers: herbivores are primary consumers and feed on producers. Carnivores are secondary consumers and feed on herbivores, and so on. The last links are the decomposers, microorganisms that act on dead animals degrading organic matter.
When one of the links disappears, it affects the superior links as they will not have their food source. The immediately anterior link will be beneficiated, as it will not be eaten by its predator. And finally, as this last link will overgrow, it will consume greater quantities of its food, causing a decrease in its anterior link.
In the exposed example, pig frog is a secondary consumer. The primary consumer is the everglade crayfish, that feeds on plant leaves, seeds and fruits, and algae. And finally, in this chain, alligators and anhingas feed on the pig frog acting as a tertiary consumer. If pig frog disappears it will cause a decrease in alligator and anhingas populations, as the frog will not be available as their food source. The everglade crayfish will overgrow as it will not be consumed by the pig frog. And finally, as the everglade crayfish population increases, it will affect the plants and algae population, as well as the grass shrimp and worms, which are also the crayfish source of food.
