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A Garden Experiment on Competition Between Biotypes of the Common Dandelion (Taraxacum Officinale)

Otto T. Solbrig and Beryl B. Simpson
Journal of Ecology
Vol. 65, No. 2 (Jul., 1977), pp. 427-430
DOI: 10.2307/2259492
Stable URL: http://www.jstor.org/stable/2259492
Page Count: 4
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A Garden Experiment on Competition Between Biotypes of the Common Dandelion (Taraxacum Officinale)
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Abstract

Of two biotypes of Taraxacum officinale one (D) was shown previously in a glasshouse experiment to out-compete the other (A), but to set fewer seeds in unit time. The two biotypes have now been grown separately and in mixture in garden plots for four years; in certain plots they were subjected to artificial disturbance by defoliation or removal of the entire plant at midsummer for the first two years. After four years biotype D accounted for c. 85% of the plants and 91% of the biomass in the mixtures on the undisturbed plots, but only 7-9% of the plants and 3-7% of the biomass on the disturbed plots.

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