MARS 3450 Lecture : 1 - Biodiversity.pdf
12 Nov 2013
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How is diversity expressed: diversity index: a mathematical calculation. H" = - ni/n * ln ni/n) total # individuals ni = importance value for each species. Benthic invertebrates from buzzards bay sampled sampled (valiela 1995) How is diversity expressed: diversity curves: a graphical representation. A practical limitation is deciding what is included in the. Usually determined by the technical limitations of identification. Accumulation curves n = number sampled: michigan plants (n = 1,783, costa rican birds (n = 5,007, human oral bacteria (n = 264, costa rican moths (n = 4,538, east amazonian soil bacteria (n = 98) Curvature tells how well the population has been sampled. Tropical moths (n = 4,538) (100"s of km of forest) Temperate soil bacteria (n = 137) (a few g of soil) Our ability to sample bacterial diversity in a few grams of some soils may be similar to our ability to sample moth diversity in a few hundred square kilometers of tropical forest.
