11.1 Energy in Ecosystems

Question 1

Biomass

Answer 1

how energy is measured in living things

Question 2

Productivity

Answer 2

how much energy producers produce

Question 3

Efficiency

Answer 3

how much energy is transferred to the next Trophic level

Question 4

Photosynthesis

Answer 4

sunlight(energy) + 6 carbon dioxide + 6 water -> glucose + 6 oxygen gas

Question 5

Respiration

Answer 5

glucose + 6 oxygen gas -> 6 carbon dioxide + 6 water + ATP(energy)

Question 6

What type of organisms perform the processes of photosynthesis and cellular respiration?

Answer 6

Photosynthesis: producers
Respiration: producers and consumers

Question 7

What is shown in a pyramid of energy vs. a pyramid of numbers vs. a pyramid of biomass?

Answer 7

pyramid of energy: amount of energy passing through each Trophic level over a period of time
pyramid of biomass: mass of biological matter at each Trophic level
pyramid of numbers: number of organisms at each Trophic level

Question 8

why it is considered more efficient to eat at a lower trophic level vs. a higher trophic level?

Answer 8

less energy has been lost due to cellular respiration and waste at lower Trophic levels than higher Trophic levels

Question 9

Predict how the amount of solar energy in a location relates to productivity

Answer 9

more solar energy -> more productivity
less solar energy -> less productivity

Question 10

Predict how the amount of solar energy in a location relates to biomass

Answer 10

more solar energy -> more biomass
less solar energy -> less biomass

Question 11

Rule of 10:
If producers capture 2.7 W/m2, how much energy will be available for the secondary consumer?

Answer 11

producer to primary: 2.7 * 0.1 = 0.27
primary to secondary: 0.27 * 0.1 = 0.027
producer to secondary = 0.027