Testing the reliability of pollen-based diversity estimates |
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Authors: | Matthew Charles Peros Konrad Gajewski |
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Institution: | (1) Laboratory for Paleoclimatology and Climatology, Department of Geography, University of Ottawa, 60 University Avenue, Ottawa, ON, Canada, K1N 6N5 |
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Abstract: | Rarefaction analysis is a common tool for estimating pollen richness. Using modern and fossil pollen data from the Canadian
Arctic and Greenland, we examine the effects of pollen concentration (grains/cc) and evenness (the distribution of species
abundances) on palynological richness. Our results show that pollen richness and concentration have a strong negative correlation
at low pollen concentrations. There is a positive correlation between pollen evenness and richness, although the strength
of this relationship is difficult to determine. Rarefaction analysis on samples of low concentration or high evenness is likely
to lead to pollen richness being less underestimated than on samples of high concentration or low evenness. These findings
corroborate theoretical research on these issues. |
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Keywords: | Pollen analysis Rarefaction Diversity Pollen concentration Evenness Paleoecology Arctic |
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