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- W2018045360 abstract "Abstract: Harvesting of wild American ginseng ( Panax quinquefolius ) for the herbal trade has lowered natural population sizes. We tested for reproductive limitation due to small population size (a form of the Allee effect) by experimentally planting “natural” populations numbering 4, 16, and 64 using 4‐year‐old cultivated plants. Plant size traits and reproductive traits ( bud, flower, green fruit, and mature fruit) were recorded through the ensuing summer. Fruit production per flower and per plant increased in proportion to flowering population size ( p = 0.0063 and p = 0.0017, respectively), strongly suggesting that an Allee effect occurs in very small populations. The increase in fruit production was not explained by either plant or inflorescence size differences. Although population size‐dependent pollination, through insufficient pollinator visitation rate or pollen transfer rate, seems the most likely cause of the observed effects, our limited observations of pollinators were not sufficient to demonstrate a change in pollination rates as a function of population size. Knowledge of the presence as well as the mechanism underlying this Allee effect may be especially useful for management and determination of minimum viable population size of the species in the wild." @default.
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- W2018045360 date "2001-02-01" @default.
- W2018045360 modified "2023-10-10" @default.
- W2018045360 title "Experimental Demonstration of an Allee Effect in American Ginseng" @default.
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- W2018045360 doi "https://doi.org/10.1111/j.1523-1739.2001.98546.x" @default.
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