Initial 8.0 mg/L; light 11.5; dark 6.0.
What are the NPP and respiration values, and what do they tell us about the system?
- A
NPP = 5.5; R = 5.5; balanced system
- B
NPP = 11.5; R = 0; no respiration
- Ccheck_circle
NPP = 3.5; R = 2.0; the system is net autotrophic (producing more than it consumes)
- D
NPP = 2.0; R = 3.5; net heterotrophic
Explanation
NPP = light final - initial = 11.5 - 8.0 = 3.5 (net O2 made available). R = initial - dark final = 8.0 - 6.0 = 2.0. Because NPP > 0, the system is net autotrophic, producing more organic matter than is consumed.