Question

part 1:
below is a food web. using the key label each organism with its trophic level.
a - autotroph
1 - primary consumer
2 - secondary consumer
3 - tertiary consumer
4 - quaternary consumer
part 2:
what do the arrows represent in a food chain or a food web?
part 3:
if 5972 calories were found in the shark, how many calories would be in the limpet trophic level, if the shark ate the starfish that ate the limpet?

Explanation:

Step1: <Understand energy transfer>

In a food chain, only about 10% of the energy is transferred from one trophic level to the next. So if we go from shark (higher - level consumer) to starfish (lower - level) to limpet (even lower - level), we need to work backwards.

Step2: <Calculate energy at each level>

Let \(E_{shark}=5972\) calories.
If the shark ate the starfish, and assuming the energy transfer rate \(r = 10\%=0.1\), then the energy in the starfish \(E_{starfish}=\frac{E_{shark}}{r}=\frac{5972}{0.1}=59720\) calories.
Since the starfish ate the limpet, the energy in the limpet \(E_{limpet}=\frac{E_{starfish}}{r}=\frac{59720}{0.1}=597200\) calories.

Answer:

597200