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A Model of Pollen Source Area for an Entire Lake Surface


A model of pollen deposition on the surface of an entire basin is developed to estimate pollen source area, and results are compared with those for a point at the center of a basin (I. C. Prentice, 1985, Quaternary Research 23, 76-86; 1988, "Vegetation History," (pp. 17-42, Kluwer Academic). This model is more appropriate for approximating the source area of pollen in lake sediment, since mixing in lake water and focusing of sediment redistribute pollen originally deposited over the entire surface. In general, the pollen source radius for the entire basin surface is 10-30% smaller than the source radius for a point at the center; the difference in the source radius is more profound for heavier pollen types such as spruce and sugar maple than for lighter types such as oak and ragweed. The average pollen input to the entire surface is more strongly influenced by nearby pollen sources than pollen deposition at the center. The pollen record from a lake may therefore provide different spatial resolution than the record from a bog of similar radius.

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A. P. Bonny (1980). Seasonal and annual variation over 5 years in contemporary airborne pollen trapped at a Cumbrian lake. Journal of Ecology 68, 421441.

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I. C. Prentice (1985). Pollen representation, source area, and basin size: Toward a unified theory of pollen analysis. Quaternary Research 23, 7686.

I. C. Prentice (1988). Records of vegetation in time and space: the principles of pollen analysis. In “Vegetation History” ( B. Huntley and T. Webb III., Eds.), pp. 1742. Kluwer Academic, Dordrecht.

I. C Prentice B. E. Berglund , and T. Olsson (1987). Quantitative forest-composition sensing characteristics of pollen samples from Swedish lakes. Boreas 16, 4354.

M. W. Schwartz (1989). Predicting tree frequencies from pollen frequency: An attempt to validate the R value method. New Phytologisi 112, 129143.

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Quaternary Research
  • ISSN: 0033-5894
  • EISSN: 1096-0287
  • URL: /core/journals/quaternary-research
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