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- W2092045362 abstract "Although the dispersal of seeds around individual plants (the seed shadow) has frequently been characterized, the dispersion of seedlings around plants (the seedling shadow) has rarely been examined. We mapped 101 and 149 seedlings of the prairie compass plant (Silphium laciniatum) that appeared in our study area in 1987 and 1990 following mass flowering in 1986 and 1989. We also mapped the locations of flowering stems which appeared in 1986 and 1989 and recorded the number of flowerheads at each stem location. The frequency distributions of distance between a seedling and the nearest flowering stem were identical in the 2 years, with a median distance of 1.0 m. The large size and lack of wind-dispersal structures of compass plant seeds (achenes) are responsible for their limited dispersal. From estimates of the total seed production in the study area in 1986 and 1989, we calculated that about 1% of seeds became seedlings in each year. Flowering stem locations with a higher number of flowerheads had a significantly higher density of seedlings around them. This indicates that recruitment to compass plant populations is not a lottery; individual plants that produce more seeds produce, on average, more seedlings." @default.
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- W2092045362 date "1992-02-01" @default.
- W2092045362 modified "2023-09-24" @default.
- W2092045362 title "DISPERSION OF SEEDLINGS OF THE PRAIRIE COMPASS PLANT, SILPHIUM LACINIATUM (ASTERACEAE)" @default.
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- W2092045362 doi "https://doi.org/10.1002/j.1537-2197.1992.tb13629.x" @default.
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