Is it possible that a different number of bird point-counts may bias the results of statistical analyses such as diversity indexes?

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Gabriel Silva dos Santos

Hi, Otto Monge,

I don’t specialist in richness index, but I think that this difference may bias the result. But if you across rarefy method you can access the species number estimated without problems notwithstanding this difference.

I recommend “Ecological Diversity and Its Measurement” (Magurran, 1988), I think that this can help you.

Otto Monge

Thanks Gabriel, I'm acquainted with rarefaction methods to standardize different sampling efforts. The sampling is going to be done within a single habitat type (not in different habitats), but involves two different seasons: dry and wet.