Concept of productivity
- 1. CLICK TO EDIT MASTER TITLE STYLE 7/25/2017 1 CONCEPT OF PRODUCTIVITY
- 2. PRODUCTIVITY rate of biomass production • biomass-the mass of living organisms within a particular environment has 2 kinds (primary and secondary)
- 3. 2 Kinds of Productivity Primary Productivity Secondary Productivity
- 4. 2 Kinds of Productivity 1. Primary Productivity ☺ Green plants fix solar energy and accumulate it in organic forms as chemical energy ☺Photosynthesis ☺Chemosynthesis
- 6. 2 Aspects of Primary productivity Gross Primary Productivity Net Primary Productivity
- 7. 2 Aspects of Primary productivity • The rate of production of biomass/ organic matter by producers during photosynthesis • Total gain in energy or biomass per unit time Gross Primary Productivity (GPP) Respiration • opposite of photosynthesis • absorb free molecules of oxygen to create water, carbon dioxide, and energy which helps the plant grow
- 10. • Refers to the biomass/organic matter available for the consumption to heterotrophs, left after some respiration loses • The amount of energy-bound organic matter created per unit area and time that is left after respiration • NPP = GPP – respiration 2 Aspects of Primary productivity Net Primary Productivity (NPP)
- 12. 2 Kinds of Productivity ☻The rates at which the heterotrophic organisms resynthesize the energy-yielding substances ☻transfer of organic material between trophic levels 2. Secondary Productivity
- 14. Summary 1. gross productivity – total biomass produced 2. net productivity – total biomass produced minus amount used by organism 3. primary productivity – productivity at 1st trophic level 4. secondary productivity – productivity at higher trophic level 5. gross primary productivity – rate at which producers use photosynthesis to make more biomass 6. net primary productivity – rate at which energy for use by consumers is stored in new biomass
- 15. References • http://www.biologydiscussion.com/ecology/productivity-in-ecosystem/52928 • http://ib.bioninja.com.au/standard-level/topic-4-ecology/42-energy-flow/ecological- productivity.html • https://en.wikipedia.org/wiki/Productivity_(ecology) • http://www.mrgscience.com/ess-topic-23-flows-of-energy-and-matter.html