1.8

Question 1

Ecosystem Productivity

Answer 1

The amount of energy available in an ecosystem determines how much life the ecosystem can support. Energy enters the ecosystem as sunlight, through photosynthesis. (Only 1-2% o f the light falling on a tree is captured)

Question 2

Producers (Autotrophs)

Answer 2

Are able to use the sun’s energy to produce usable energy through the process called photosynthesis

Question 3

Photosynthesis Equation

Answer 3

6 Co2 ( Carbon dioxide) + 6 H2O (water) + sunlight –> C6H12O6 (glucose) + 6 O2 (oxygen)

Question 4

Net Primary Productivity (NPP)

Answer 4

Everything left over for other organisms to eat

Question 5

Gross Primary Productivity

Answer 5

The total amount of solar energy that the producers in an ecosystem capture via photosynthesis over a given amount of time. (Units : kcal / m^2 / yr )

Question 6

Solar radiation

Answer 6

quality/quantity of light

Question 7

Human Impact

Answer 7

Use, waste, or destroy 20-30% of Earth’s NPP. Make up <1% of the biomass of Earth’s consumers