Biology · BIODIVERSITY AND CONSERVATION

Consider the following statements regarding the stability of a biological community and ecosystem functioning: (A) A stable community should not show too much variation in productivity from year to year. (B) A stable community must be either resistant or resilient to occasional disturbances. (C) A stable community must show high susceptibility to invasions by alien species to promote diversity. (D) David Tilman demonstrated that plots with more species showed less year-to-year variation in total biomass. How many of the above statements are correct?

1. Only one
2. Only two
3. Only three
4. All four