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Estimating pollen diversity from pollen accumulation rates: a method to assess taxonomic richness in the landscape

Institute of Plant Sciences and Oeschger Centre for Climate Change Research, University of Bern, Altenbergrain 21, CH-3013 Bern, Switzerland, knaap{at}ips.unibe.ch

A new method is presented to estimate pollen diversity on the basis of pollen-accumulation rates, rather than on a constant count of pollen as is traditional. Accumulation-based estimates of pollen diversity can be interpreted in terms of taxonomic richness on the landscape. The traditionally used constant-count estimates, on the other hand, reflect the evenness in the vegetation much more than its taxonomic richness, but they reflect this in a distorted way because of the real but mostly unknown differences in pollen productivity among plant taxa. Pollen-accumulation rates might also be used to estimate turnover of plant species from pollen assemblages. Differences in pollen productivity among plant taxa also have effects on various other data-summarizing techniques, including estimates of rates of change.

Key Words: Pollen diversity • taxonomic richness • pollen accumulation rates • pollen count • pollen productivity • plant species turnover.

The Holocene, Vol. 19, No. 1, 159-163 (2009)
DOI: 10.1177/0959683608098962


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