37.15 - 37. 17 Productivity and Energetic Hypothesis Flashcards
Ecosystem Productivity
how productive an ecosystem is
How many types of ecosystem productivity are there
2
What are the 2 types of ecosystem productivity
Gross Primary Productivity and Net Primary Productivity
GPP
Gross Primary Productivity
NPP
Net Primary Productivity
Gross Primary Productivity
the total amount of solar energy that the producers in an ecosystem capture via photosynthesis over a given amount of time
Net Primary Productivity
the energy captured (GPP) that is lost due to cellular respiration
__% of solar energ is captured for photosynthesis and about ____ of that is lost due to cellular respiration
1; half
Energetic Hypothesis is aka
the 10% rule
Energetic Hypothesis
states only about 10% of the energy on a given trophic level gets passed on to the next trophic level, so 90% is lost as heat
Organisms do not eat all of the food in the previous trophic level
True or False
True
Ecological Pyramid
illustrative way of showing the 10% rule
Why is the Energetic Hypothesis true
bc we can only use about 10% of energy for growth and reproduction and bc we create waste and bc Organisms do not eat all of the food in the previous trophic level
Energy Pyramid
most common type of ecological pyramid which shows the 10% rule measured in calories or Joules
Pyramid of Biomass
measured in g or kg
