Trophic Levels and Food Chains Quiz



9 Questions

What is the trophic level of an organism?

What is a food chain?

What is the origin of the word 'trophic'?

Who developed the concept of trophic level?

What is a food web?

What is the average energy conversion rate for consumers at each trophic level?

What is the mean trophic level of humans?

What are tritrophic interactions?

What is the impact of climate change on tritrophic interactions?


Position of an Organism in a Food Chain:

  • The trophic level of an organism is the position it occupies in a food web.

  • A food chain is a succession of organisms that eat other organisms and may, in turn, be eaten themselves.

  • The trophic level of an organism is the number of steps it is from the start of the chain.

  • Ecological communities with higher biodiversity form more complex trophic paths.

  • Trophic derives from the Greek τροφή (trophē) referring to food or nourishment.

  • The concept of trophic level was developed by Raymond Lindeman (1942).

  • Trophic levels can be represented by numbers, starting at level 1 with plants.

  • A diagram that sets out the intricate network of intersecting and overlapping food chains for an ecosystem is called its food web.

  • Consumers at each level convert on average only about 10% of the chemical energy in their food to their own organic tissue.

  • The trophic level of a species may vary if it has a choice of diet.

  • Humans have a mean trophic level of about 2.21, about the same as a pig or an anchovy.

  • Since biomass transfer efficiencies are only about 10%, it follows that the rate of biological production is much greater at lower trophic levels than it is at higher levels.Tritrophic Interactions Summary

  • Tritrophic interactions involve three trophic levels: plants, herbivores, and predators.

  • Traditional ecological studies have focused on pairwise interactions between two trophic levels, which may be misleading.

  • Significant interactions can occur between the first and third trophic levels, affecting herbivore population growth.

  • Simple genetic changes can yield morphological variants in plants that differ in their resistance to herbivores.

  • Plant architecture can affect the enemies of the herbivore, which can impact herbivore population growth.

  • Plants can develop chemical defenses against herbivores.

  • Understanding tritrophic interactions is important for ecological studies and pest management strategies.

  • Tritrophic interactions can be complex and difficult to study, but advancements in technology and modeling can help.

  • Tritrophic interactions can have cascading effects on entire ecosystems.

  • Climate change can impact tritrophic interactions by altering plant and herbivore populations.

  • The study of tritrophic interactions is an active area of research in ecology.

  • More research is needed to fully understand the complexities of tritrophic interactions and their impacts on ecosystems.


Test your knowledge on the position of organisms in a food chain with this informative quiz! Learn about trophic levels, food chains, and food webs, and understand the intricate relationships between plants, herbivores, and predators in tritrophic interactions. Discover the impact of biodiversity and climate change on ecosystems, and explore the fascinating world of ecological studies and pest management strategies. This quiz will challenge your understanding of the complexities of trophic paths and the importance of understanding tritrophic interactions in ecological

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