3 Primary And Secondary Production Flashcards
Rate at which light energy is converted to the chemical energy of organic compounds by autotrophs in an ecosystem
Primary productivity
Total primary production in an ecosystem
Gross Primary Productivity
Equal to gross primary production minus the energy used by the primary producers for respiration
Net Primary Production
Can be expressed as energy per unit area per unit time
Primary Production
Are among the most productive terrestrial ecosystem
Tropical rain forest
Are also very productive but they cover only a small area compared to that covered by tropical rain forest
Estuaries and coral reefs
Has a relatively low production per unit area but contributes more net primary production than any other single ecosystem because of its large size
Open ocean
Amount of chemical energy in consumer’s foods that is converted to their own new biomass during a given time period
secondary production
Is the energy stored in biomass represented by growth and reproduction
Net secondary production
Consists of the total energy taken in and used for growth, reproduction, and respiration
Assimilation
The percentage of production transferred from one trophic level to the next
Trophic efficiency
Or trophic pyramid, is a graphical representation designed to show the biomass or productivity at each trophic in a given ecosystem
Ecological pyramid
Represents the ecological consequence of low trophic efficiency
Biomass pyramid
