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8. If the killer whale obtained 26,000 Joules of energy by eating the crabeater seal, how much energy was
available at each of the following trophic levels of the food chain?
Algae → Krill → Adelie Penguin → Crabeater Seal

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Answer:

According to the Ecological tithe law, if the Killer whale obtained 26,000 joules from Crabeater Seal, the amount of energy available in each link in the chain was:

  • From the Algae for Krill was 26,000 Kilojoules
  • From Krill to the Adelie Penguin was 2,600 Kilojoules
  • From Adelie penguin for Crabeater Seal was 260 Kilojoules.

Explanation:

The energy obtained by the killer whale was 26,000 joules, or 26 Kilojoules (1000 joules = 1 Kilojoule) and corresponds to 10% of the energy available in the previous link in the chain.

In ecology and trophic chains, according to the 10% law -also called the Ecological tithe law- the amount of energy available that is transferred at each level of the chain is equivalent to 10% of the previous level.

If one takes into account that the amount of energy obtained by the final link, in this case the killer whale was 26,000 joules, it can be said that at the previous level the available and transferred energy was 10 times greater:

  • From Algae to Krill was 26,000,000 joules = 26,000 Kilojoules.
  • From Krill to Adelie Penguin was 2,600,000 joules = 2,600 KJoules
  • From Adelie penguin for Crabeater Seal 260,000 joules = 260 KJoules.

Finally, the killer whale only obtained a fraction of the energy that was initially available in the Algae.

Learn more:

Energy transfer within an ecosystem https://brainly.com/question/1698053

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