Refer to the Graph

Refer to the graph. According to the graph, which statement best describes the relationship between total plant cover (a measure of productivity) and number of species (species richness) in test plots?

A) Greater species richness is associated with lower productivity.
B) Greater species richness is associated with greater productivity.
C) Productivity and species richness do not appear to show a relationship.
D) Productivity remains relatively high regardless of total plant cover.
E) Productivity increases when species richness is low but decreases when it is high.

Correct Answer:

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