Question

The graph to the right shows the results from one of Tilman’s experiments to investigate the relationship between diversity and stability in plant communities. From this graph, one can conclude that

Drought resistance (change in biomass 1986-1988) 10 Plant species richness before drought 15 20

a. resistance to drought increases with species diversity.

b. drought resistance is not improved much by increasing S from 20 to 25, suggesting some redundancy.

c. diverse communities tend to be more stable than less diverse ones.

d. All of the above.

Answer 1

Answer is option a that is resistance to drought increases with species diversity, that is as the species number increases the drought resistance species number also increases, also some species are do not have resistance to drought but some species has high resistance so answer is option a and other option not relevant to graph.