What confuses this question from the very beginning, is the multiplicity of possible definitions of “diversity” and “stability.” There are probably no better instances of formalization indeterminacy in any scientific context. For instance, a reasonable first attempt to define diversity would be to equate the diversity of a community to the number of species in it, that is, its species “richness.” The trouble is that there is ample reason to doubt that richness captures all that is relevant about