As CO₂ concentrations in the atmosphere increase, how might the increase be expected to influence land-based NPP rates? A) NPP will increase because the CO₂ will replace other nutrients. B) NPP will decrease because the extra CO₂ will be toxic. C) NPP will not change because photosynthesis is not limited by CO₂. D) NPP will increase because CO₂ will inhibit respiration. E) NPP will decrease because CO₂ will stimulate respiration.

Question

Quizplus · Accepted Answer

CO₂ is not a limiting nutrient for photosynthesis, so an increase in its concentration would not directly affect land-based NPP rates. Other nutrients like nitrogen, phosphorus, and carbon dioxide can affect NPP rates.

As CO2 Concentrations in the Atmosphere Increase, How Might the Increase

As CO₂ Concentrations in the Atmosphere Increase, How Might the Increase