Energy Transfers Flashcards
1
Q
Gross primary productivity definition
A
The total amount of chemical energy from photosynthesis that is incorporated into biomass by plants.
2
Q
Net primary productivity equation
A
gross primary productivity – respiratory loses
3
Q
Energy efficiency equation
A
(net productivity / energy received) x 100
4
Q
Reasons for energy loss in food chains
A
- not eating all of organism/unable to digest parts e.g teeth, fur, bones
- body heat
- excretion (e.g urine)
5
Q
What does having high GPP mean?
A
Lots of energy is being converted into biomass from sunlight
6
Q
Explain the relationship between GPP, NPP and respiration (2 marks)
A
Respiration releases energy (1)
NPP = GPP - energy lost through respiration
