EasyBiologyHigh School (11–12)Ecology and Environment › Ecosystems and Food ChainsConceptualAPA-LevelIB
A class lists seven things found in a pond: a water lily, the sunlight, a tadpole, bacteria on the…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A class lists seven things found in a pond: a water lily, the sunlight, a tadpole, bacteria on the bottom, the water temperature, a fish and a fungus on a dead leaf.
- Which of them are abiotic?
- Which are producers?
- Which are consumers?
- Which are decomposers?
Need a reminder? The key ideaShow
An ecosystem has an abiotic part (water, light, temperature, soil, nutrients) and a biotic part (producers, consumers, decomposers). The species sit in layers, which is called stratification. In a forest the layers are the trees, the shrubs, and the herbs and grasses.
The worked solution
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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.
Step 1. (a) The sunlight and the water temperature are abiotic. They are not living.
Step 2. (b) The water lily is a producer. It makes food from light.
Step 3. (c) The tadpole and the fish are consumers.
Step 4. (d) The bacteria and the fungus are decomposers. They live on dead matter.
Answer: (a) sunlight, temperature; (b) water lily; (c) tadpole, fish; (d) bacteria, fungus.
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