A chain of a pond has 8000 kJ of energy in each square metre in a year at the first trophic level…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A chain of a pond has of energy in each square metre in a year at the first trophic level. Only of the energy passes to each next level.
- How much energy is there at T2?
- How much at T3?
- How much at T4?
Need a reminder? The key ideaShow
The Sun is the only source of energy for ecosystems, except the deep sea hydrothermal ones. Less than of the sunlight is PAR, and plants capture to of the PAR. The flow of energy is one way. Only about of the energy passes from one trophic level to the next.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. at T1. passes on.
Plan. Multiply by for each step.
Step 1. (a) .
Step 2. (b) .
Step 3. (c) .
Answer: ; ; .
Check. Each level has one tenth of the level below.
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