1997b) that relates the

equilibrial biomass of a plant community, [B.sup.(N)], to its original plant species diversity, N:

The models diverged in their predictions about how

equilibrial algal biomass would respond to grazer manipulations across systems that varied in algal carrying capacity (i.e., as determined by phosphorus levels).

3) be expressed as a change in

equilibrial response rather than as a rate to better reflect effects on population persistence.

Regardless of whether stability can be viewed as the product of an

equilibrial process (DeAngelis and Waterhouse 1987, Doherty and Williams 1988a) or as a measure of environmental determinism (Grossman 1982, Meffe and Sheldon 1990), its measurement is critical.

Note that the

equilibrial free space of the dominant as a single species, [Mathematical Expression Omitted]([Alpha], [Beta]), is constant with respect to area.

For Lotka-Volterra type models,

equilibrial values can be obtained by taking the negative inverse of the community matrix described above (-[A.sup.-1]) and multiplying it by a column vector, which contains the density-independent terms in the underlying differential equations (e.g., [b.sub.v] - [m.sub.v] and -[m.sub.h] in Eqs.

Selection that does not depend upon genotype frequency tends to increase either the average growth rate or the

equilibrial abundance of the species experiencing selection (Roughgarden 1979).

For my analyses, I considered the number of species remaining after each level of habitat destruction, recommencing each time with

equilibrial abundances from the level of habitat destruction immediately preceding.