A patch of ground gives 1200 g of food in a day…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A patch of ground gives g of food in a day. At first, animals of one species share it equally. Then animals of a second species begin to eat from the same patch and take an equal share.
- How much food does each animal get before the second species comes?
- How much does each get afterwards?
- By what per cent does the share of each animal fall? Give the answer to one decimal.
Need a reminder? The key ideaShow
Competition harms both species. Closely related species that compete for a limited resource cannot live together for ever (Gause). Connell: Balanus excludes Chthamalus. Competitive release follows the removal of the better competitor. Species can live together by resource partitioning.
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. g in a day. and then animals.
Plan. Divide, then find the per cent fall.
Step 1. (a) g.
Step 2. (b) g.
Step 3. (c) .
Answer: g; g; .
Check. The newcomers press on the first species, which is what competition does.
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