environmental stress and biodiversity
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Environmental Stress and Biodiversity. Diversity Indices. Diversity is composed of / \ richness eveness (# of taxa) (distrib. of indiv. among taxa) Note: richness alone often useful but problems: - PowerPoint PPT PresentationTRANSCRIPT
Diversity Indices
Diversity is composed of / \ richness eveness (# of taxa) (distrib. of indiv. among taxa)
Note: richness alone often useful but problems: - does not take # of individuals into account
- very dependent on sample size unless large
Sequential Comparison Index
• Developed for use in 3rd world countries• Main advantage – no taxonomic
expertise required• Measures probability of next sampled
organism being the same as the last one• Will go over how to calculate in lab