David Tilman's experiments showed that as species richness increases, productivity _______ and the variation in productivity _______.
A) decreases; increases
B) decreases; remains constant
C) decreases; decreases
D) increases; increases
E) increases; decreases

Question

Quizplus · Accepted Answer

Through his experiments, David Tilman found that as species richness increases, productivity increases as different species utilize resources differently and increase overall productivity. Furthermore, variation in productivity decreases as more species are added, indicating greater stability in the ecosystem. Therefore, the option E (increases; decreases) is the best choice.

David Tilman's Experiments Showed That as Species Richness Increases, Productivity