If the sardines in the marine food web shown disappeared, which organisms would be left with no food at all? A food web drawn as labelled boxes on rows by feeding level, with arrows pointing from each organism to the one that eats it. Arrows: Phytoplankton to Zooplankton; Zooplankton to Sardine; Zooplankton to Jellyfish; Sardine to Tuna; Sardine to Seabird; Jellyfish to Turtle; Tuna to Shark; Turtle to Shark.

If the sardines in the marine food web shown…

If the sardines in the marine food web shown disappeared, which organisms would be left with no food at all?

Question 12

MediumOriginal question

If the sardines in the marine food web shown disappeared, which organisms would be left with no food at all?

A food web drawn as labelled boxes on rows by feeding level, with arrows pointing from each organism to the one that eats it. Arrows: Phytoplankton to Zooplankton; Zooplankton to Sardine; Zooplankton to Jellyfish; Sardine to Tuna; Sardine to Seabird; Jellyfish to Turtle; Tuna to Shark; Turtle to Shark.

The tuna and the seabirdCorrect answerYour answerThe shark onlyCorrect answerYour answerThe jellyfish and the turtleCorrect answerYour answerThe zooplanktonCorrect answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer A

Correct answer: A

In this web the tuna and the seabird each eat only sardines.
The shark would still have turtles, which eat jellyfish, so it keeps a food source.

Worth noting

An animal with more than one prey is buffered against losing one of them; that is why webs are more stable than single chains.

Concept: Dependence within a food web
Typical timeTypical: 60 s
Your timeYours: —

The rule this testsFood chains and energy flow

Practise this chapter →

Ten questions from Ecosystems and Biodiversity, at your own pace.

Practise this chapter →

Ten questions from Ecosystems and Biodiversity, at your own pace.

If the sardines in the marine food web shown disappeared, which organisms would be left with no food at all?

Question 12

Explanation