Neutral Theory of Biodiversity
Hubbell's unified neutral theory — speciation, drift, dispersal balance
SAD (log-series): φ(n) = θ·x
n
/n | θ = 2J
M
·ν | Fundamental biodiversity number θ
Preston lognormal emerges for large J | I = m·J/(1−m)
Community size J =
500
Biodiversity number θ =
10
Dispersal fraction m =
0.10
Simulate Metacommunity
—
Species richness S
—
Shannon H'
—
Evenness J'
—
Simpson D