pyramids of biomass

• What is meant by a permit of biomass?

  A graphical representation of biomass at trophic levels
• How is biomass lost between different trophic levels?

  Through metabolic processes and waste
• How do you calculate the efficiency of biomass transfer?

  Gain in biomass divided by total intake
• What is the focus of this video for students?

  Triple biology students only
• What do trophic levels indicate?

  An organism's position on a food chain
• What is biomass?

  The mass of all organisms in a trophic level
• How would a scientist determine the biomass of caterpillars?

  Collect, kill, dry, and weigh them
• Why is dry biomass preferred over wet biomass?

  It provides more accurate results
• What do scientists often do instead of killing animals for biomass data?

  Look up data in scientific journals
• What is the role of producers in a food chain?

  They use light energy for photosynthesis
• What percentage of light energy is absorbed by producers?

  About 1%
• Why does biomass decrease at each trophic level?

  Due to energy loss in metabolic processes
• What does biomass include in an organism?

  Proteins, lipids, and carbohydrates
• If a bird eats 10 grams of caterpillar biomass, how much ends up as bird biomass?

  About 1 gram
• What happens to the biomass that is not absorbed by the bird?

  It is excreted as feces or waste
• How is energy from respiration used by birds?

  For movement and maintaining body temperature
• How does a realistic pyramid of biomass differ from an ideal one?

  It shows only about 10% transfer efficiency
• How many kilograms of grass biomass does a cow consume in a month?

  300 kilograms
• How much body mass does the cow gain from the grass biomass?

  15 kilograms
• What is the formula for calculating efficiency of biomass transfer?

  Efficiency = gain in biomass / total intake
• How do you convert the efficiency of biomass transfer to a percentage?

  Multiply by 100
• Why is the efficiency of biomass transfer low in cows?

  Due to movement and temperature maintenance
• What are the key points about biomass transfer in trophic levels?

  • Biomass decreases at each trophic level
  • Only about 10% of biomass transfers to the next level
  • Energy is lost through metabolism and waste
  • Producers absorb about 1% of light energy
• What steps are involved in calculating biomass transfer efficiency?

  1. Determine gain in biomass
  2. Determine total biomass intake
  3. Use the formula: Efficiency = gain / intake
  4. Convert to percentage by multiplying by 100