Environmental Engineering Reference
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Figure 3. Simulated steady-states of species-abundance distributions (SADs). From top to bottom,
graphs show average patterns for intrinsically neutral, Lotka-Volterra, and dominant-fugitive
communities. The SADs each show mean ± s.e. of six replicate communities with carrying capacity
K = 1000 habitable patches. Frequencies are compared to log-normal (left-hand column) and
MacArthur's broken-stick (right-hand column). See Materials and Methods for input parameter
values and the process of random species assembly.
 
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