Energy Flow in Ecosystems

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Questions and Answers

What percentage of energy is available to the next trophic level in an ecosystem?

  • 50%
  • 90%
  • 20%
  • 10% (correct)

What is the term for the percentage of useable energy transferred as biomass from one trophic level to the next?

  • Energy balance
  • Ecological efficiency (correct)
  • Assimilation efficiency
  • Production efficiency

What is the main driver of biogeochemical cycles?

  • The flow of energy (correct)
  • Ecological efficiency
  • Trophic levels
  • Living organisms

What is the term for the proportion of production at one trophic level that is eaten by the next trophic level?

<p>Consumption efficiency (D)</p> Signup and view all the answers

What is the typical number of levels in a food chain?

<p>3-5 (A)</p> Signup and view all the answers

What is the term for the activities performed by living organisms?

<p>Biological processes (C)</p> Signup and view all the answers

What type of organisms are responsible for producing most of the organic nutrients for the biosphere?

<p>Photoautotrophs (C)</p> Signup and view all the answers

What is the primary source of energy for autotrophs?

<p>An energy source, such as sunlight (D)</p> Signup and view all the answers

What is the term for the breakdown of dead organic matter by bacteria and fungi?

<p>Decomposition (B)</p> Signup and view all the answers

Which type of organism feeds on dead remains of animals and plants?

<p>Scavenger (C)</p> Signup and view all the answers

What is the term for the network of interconnected paths of energy flow in an ecosystem?

<p>Food web (B)</p> Signup and view all the answers

Which type of organism is responsible for releasing nutrients back into the environment through the decomposition of organic matter?

<p>Decomposer (C)</p> Signup and view all the answers

What is the main limitation of using ecological pyramids to explain energy flow in an ecosystem?

<p>They oversimplify energy flow (B)</p> Signup and view all the answers

What happens to the chemical energy available at each higher trophic level due to heat loss?

<p>It decreases by 90% (C)</p> Signup and view all the answers

What is the purpose of the 10% Rule in the context of energy supply and food chains?

<p>To limit the length of food chains (A)</p> Signup and view all the answers

What is the net primary production of an ecosystem?

<p>The amount of biomass produced minus the amount used by producers in cellular respiration (D)</p> Signup and view all the answers

What is the primary purpose of pyramids of energy?

<p>To show the relative amount of energy available at each trophic level (D)</p> Signup and view all the answers

What is the main factor that sets the energy budget for ecosystems?

<p>Primary production (B)</p> Signup and view all the answers

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