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Shannon-Weiner Index (H). Maintains that diversity can be measured much like the information contained in a code or message “if you know a letter in a message, you can know the uncertainty of the next letter in a coded message” (ex. The next species that can be found in a community)
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Shannon-Weiner Index (H) • Maintains that diversity can be measured much like the information contained in a code or message • “if you know a letter in a message, you can know the uncertainty of the next letter in a coded message” (ex. The next species that can be found in a community) • bbbbbbbb has low uncertainty
Shannon-Weiner Index (H) • Assumes all species are represented in a sample and that the sample was obtained randomly: • H = - Sum(pi ln pi) • Where pi is the proportion of individuals found in the i species and ln is the natural logarithm
Total H = 1.201 Shannon-Weiner Index
Error possibility • Not all species in community