Species Diversity Two factors define species diversity:

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Species Diversity Two factors define species diversity: Species Richness: Number of species in the community. Species Evenness: Relative abundance of species.

Common Diversity Indices Shannon-Wiener index is: H = -  pilogepi Simpson’s index is: D = 1/pi2 where: pi = the proportion of each species in the total sample

Park A Park B HA= -5[(1/5)ln(1/5)]= 0.70 HB= -3[(1/3)ln(1/3)]= 0.48 HA > HB

Park C Park D HC = 0.48 HD = 0.38 HC > HD

Park E Park F HE = 0.48 HF = 0.48 HE = HF

Park G Park H HG = 0.30 HH = 0.60 HG < HH

Mark and recapture population estimate Single marking and single recapture Lincoln-Petersen index date to 1786, Laplace estimated the population size of France. MC N C N = => = R M R M: marked animal C: total recaptured sample R: recaptured and marked in C

M R N = , p = p C assumption: 1. population is closed: no migration 2. all animals are equally to be captured in each sample 3. marks are not lost, gain, and overlooked