Question

3 look at this food web. then answer the questions.
a name two producers in the food web.
b name three consumers in the food web.
c write a food chain from this food web with six trophic levels.
d name the animals that the small fish eats.
e name the animals that eat the small fish.
f explain what could happen to the community if all the frogs suddenly died.

1. how are food webs different to food chains? explain why food webs are more useful.

Explanation:

a. Producers are organisms that make their own food, which are the plants in the food web.
b. Consumers are organisms that eat other organisms; any animals in the web qualify.
c. A food chain with six trophic levels needs to follow a linear feeding path from producer to top consumer, counting each level.
d. Follow the arrows pointing to small fish to find its prey.
e. Follow the arrows pointing away from small fish to find its predators.
f. Analyze the direct and indirect effects of removing frogs: their prey will increase, their predators will lose a food source, and this ripples through the web.
g. Food chains are linear single paths, while food webs show all interconnected feeding relationships, making them more realistic for ecosystems.

Answer:

a. Land plants, tiny water plants
b. Fox, slug, frog (any three animals from the web are acceptable)
c. Tiny water plants → water fleas → diving beetle → frog → fox (Note: correction to meet 6 trophic levels: Tiny water plants → water fleas → diving beetle → frog → heron (wait, no, full 6: Tiny water plants → water fleas → diving beetle → frog → fox is 5, correct 6-level: Land plants → insect → frog → fox? No, 4. Correct path: Tiny water plants → water fleas → diving beetle → small fish → perch → heron (this is 6 trophic levels: producer, primary, secondary, tertiary, quaternary, quinary consumer))
d. Diving beetle, water fleas
e. Heron, perch
f. If all frogs died, the population of insects and diving beetles (frog's prey) would likely increase due to less predation. The fox and heron (frog's predators) would lose a food source, so their populations might decrease or they would rely more heavily on other prey like slugs or small fish, which could then see their own populations decline from increased predation. This would disrupt the balance of the community.
g. Food chains are simple, linear sequences of one organism eating another, while food webs are complex networks that show all the overlapping and interconnected feeding relationships in an ecosystem. Food webs are more useful because they provide a more accurate, realistic representation of how energy and nutrients flow through an entire ecosystem, rather than just a single isolated path, so they better show the stability and interdependence of organisms in a community.