To produce a humped-back response [Fig: jpeg, 89K] in species richness against biomass, you need only three assumptions:
This model means that the number of plants will vary with the biomass in sample quadrats of equal physical size. This variation in number of plants will cause variation through species-area relation [Fig: jpeg, 9K].
Maximum number of plants and maximum species richness is achieved at the crowding biomass, and both the plant number and species number decrease in lower and higher biomass, because
[ front page] [ misconceptions] [ simulations] [ what to do?] [ fitting] [ case study ]