Primary Productivity Flashcards
Where do plants get most of their mass? For example, the biomass of a tree comes mainly from….
A. Nutrients in the soil
B. Water in the soil
C. Air from the atmosphere
D. Energy from the sun
C. Air from the atmosphere
The sun emits a wide range of ___, which contains energy.
The sun emits a wide range of SOLAR RADIATION, which contains energy.
T or F
Within the spectrum of visible light, plants DO absorb all wavelengths.
FALSE
Within the spectrum of visible light, plants DO NOT absorb all wavelengths.
In eukaryotic primary producers, photosynthesis is carried out by ____.
chloroplasts
Chlorophylls absorb
red and violet light
reflect green and yellow
Carotenoids absorb
blue and green light
reflect yellow and orange and red
Cellulose
made up of hundreds to thousands of molecules of glucose
main component of plant cell walls
Photosynthesis
solar energy comes in, photosynthesis happens, photorespiration occurs, chemical energy (ATP) and heat produced
Primary productivity
characteristic of the primary producers of an ecosystem and determines how much energy will be available to higher trophic levels per unit time
What are the two types of primary productivity?
GPP
NPP
Gross primary productivity (GPP)
the amount of energy captured in an ecosystem
Net primary productivity (NPP)
the amount of energy that is actually assimilated into new growth and reproduction
NPP formula
NPP = GPP - respiration rate
Suppose the net primary productivity of an ecosystem in 80 units per year. The respiration
rate of primary producers is 30 units per year, and the respiration rate of herbivores is 10 units per year. The gross primary productivity is ______ units per year.
A. 40
B. 110
C. 70
D. 50
B. 110
