Problems with food web

Answer 1

There are four main problems with the food web theory:

1. It is hard to place organisms into trophic levels.

2. It is hard to place organisms into different functional groups (Some organisms can alter their feeding mechanism depending on age or circumstance).

3. There is a tendency to ignore or leave out certain groups.

For example meiofauna (organisms smaller than 0.5mm) tend to be left out as they are too difficult to study. Migratory animals suc as birds may be left out of a food web as they are not present in the habitat at the time of the study.

4. There is imperfect knowledge of the links in the food web. The complex interdependencies between organisms makes it difficult to describe the full range of relationships. Therefore food webs are always somewhat incomplete

Answer 2

It is usually used at the beginning except for mushrooms. Mushrooms are decomposers, which feed on dead bodies of animals.

Answer 3

The effects on a food web is that if either a single thing from the food chain shakes or is out the entire food web will drop.