Transfers of biomass between trophic levels

12 questions

1. Look at the food chain diagram below. Name the producer.
2. Look at the food web diagram. What type of organism is the triggerfish?
3. How many apex predators are there in this food web and what organisms are they?
4. What word describes the amount of living material found in one or more organisms?
5. Which option correctly matches the predator to the prey, based on the food web below?
6. The diagram below shows a food chain. If the number of ladybirds decreases due to disease, what will happen to the numbers of other organisms in the food chain?
7. Look at the food chain diagram below. Match the organism to the correct trophic level it occupies.
8. Look at the pyramid of biomass. What can you tell from the pyramid of biomass?
9. In food chains, biomass can be lost between different trophic levels. One example is when food that is eaten is not digested. The undigested food is released from the body. What is the release called?
10. Food chains show how food (biomass) is transferred from one organism to another. Most food chains contain five trophic levels or less. Why are food chains not longer than this?
11. How much of something (e.g. biomass) is transferred compared to how much is available is known as what?
12. Look at the table of biomasses of organisms that could be found in a food chain diagram. What is the approximate percentage efficiency of biomass transfer between each trophic level?

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