Suppose That in a Study of an Ecological Community,NPP Increases

Multiple Choice

Suppose that in a study of an ecological community,NPP increases as species richness increases,but scientists find no relationship between NPP and the number of functional roles played by the species.Which conclusion could be inferred?

A) Ecological efficiency of the community is high.
B) Ecological efficiency of the community is low.
C) Tilman and his colleagues drew the wrong conclusions from their study of prairie communities.
D) Niche complementarity does not explain the richness-productivity relationship in this community.
E) Niche complementarity explains much of the richness-productivity relationship in this community.