Community Assembly. A pervasive theme in community ecology is that the species composition of a community is governed by deterministic “assembly rules” Typically these rules emphasize the importance of interspecific interactions (e.g. niche overlap, body size distributions). Community Assembly.
J = Nc / (N1 + N2 –Nc)
But it lacks a statistical distribution. So what?
What would your null model be?
Ess = mn / P
Ess = mn / Pn (where Pn is # of sp. in pool of larger island (m≤n)
Pij = RiCj / N
Frequency of Occurrence