Results
We successfully fitted the negative exponential function to all the
simulated results and plotted the three estimated parameters (δ, ε, and
ζ) and intercepts (ζ – δ) along with the change in the parameter values
of the neutral model (θ, J , d , and m ). The blue and
orange circles indicate the results of the Bray–Curtis and Sørensen
dissimilarity indices, respectively. First, as the fundamental
biodiversity number (θ) increased, the parameters δ and ζ and the
intercepts (ζ – δ) increased (Fig. 3a, i, m), but the parameter ε
remained constant (Fig. 3e). Second, as the local community size
(J ) increased, the parameters δ and ζ and the intercepts (ζ – δ)
decreased (Fig. 3b, j, n); however, the parameter ε increased and then
remained constant when J was larger than approximately 10,000
(Fig. 3f). Third, as mortality rate (d ) increased, the parameters
δ and ζ and the intercepts (ζ – δ) decreased (Fig. 1c, k, o), but the
parameter ε increased (Fig. 3g). Finally, as immigration rate (m )
increased, the parameters δ and ζ and the intercepts (ζ – δ) decreased
(Fig. 3d, l, p), but the parameter ε increases (Fig. 3h).