When plants are initially exposed to elevated carbon dioxide levels most increase their rate of photosynthesis; how might plant communities be affected?
A)no changes other than increased NPP
B)competition increases for other resources such as sunlight or phosphorus with the eventual disappearance of some community members
C)community members decrease in size over time with the removal of the selection pressure for carbon dioxide acquisition
D)Because carbon dioxide is never a limiting factor like water, nitrogen, or phosphorus, increased levels typically have no significant effects.

Question

Quizplus · Accepted Answer

Increased rates of photosynthesis in plants due to elevated carbon dioxide can lead to increased competition for other resources such as sunlight or phosphorus. This can eventually lead to the disappearance of some community members as they are outcompeted.

When Plants Are Initially Exposed to Elevated Carbon Dioxide Levels