The use of Rarefaction Analysis for Estimating Palynological Richness from Quaternary Pollen-Analytical Data

摘要: Reconstructing temporal changes in diversity from pollen assemblages is potentially important both palaeoecologically and ecologically because community may, part, result historical processes. The use of indices such as Shannon's information index or Simpson's not appropriate with percentage data consider the numbers different taxa their relative frequencies representation. latter aspect inevitably influenced by inherent differences production dispersal. total number present a sample robust useful measure palynological richness if, only all counts are standardized to fixed grains. Rarefaction analysis implements standardization provides minimum variance unbiased estimates expected (t) random n individuals taken larger collection N containing T taxa. underlying m...