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231223s2009 xx |||||o 00| ||eng c |
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|a 10.1111/j.1523-1739.2008.01136.x
|2 doi
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|e rakwb
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|a eng
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1 |
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|a Farrington, Susan J
|e verfasserin
|4 aut
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|a Interactive effects of harvest and deer herbivory on the population dynamics of American ginseng
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|c 2009
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|a Date Completed 24.10.2012
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|a Date Revised 03.07.2012
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a ©2008 Society for Conservation Biology.
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|a Few demographic models for any species consider the role of multiple, interacting ecological threats. Many forest herbs are heavily browsed by white-tailed deer (Odocoileus virginianus) and a number of these are also harvested for the medicinal, floral, or horticultural trades. Previous studies of the viability of American ginseng (Panax quinquefolius) have separately examined the effects of harvesting and deer herbivory. We followed individually marked ginseng plants in 6 populations for 8 years and documented deer browse levels, conducted helicopter surveys to estimate the deer herd size, and documented 2 ginseng harvests. We used this long-term data set to develop a stochastic demographic model that quantified the separate and interactive role of these threats to ginseng viability. Although harvesting and deer herbivory negatively affected ginseng population growth, their effects were not additive. Deer herbivory negatively affected population growth in the absence but not in the presence of harvesting. Life table response experiments revealed that in the presence of harvesting, deer herbivory had some positive effects on vital rates because browsed plants were less apparent to harvesters. Ginseng populations that were harvested responsibly (i.e., planting seeds from harvested individuals) had higher growth rates than those that were harvested irresponsibly. We concluded that both deer populations and harvesting must be managed to ensure sustainable populations of American ginseng. Our findings underscore the importance of long-term monitoring to assess threats to viability and the need for a broad ecological understanding of the complexity of ecosystem management
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Research Support, U.S. Gov't, Non-P.H.S.
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|a Muzika, Rose-Marie
|e verfasserin
|4 aut
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|a Drees, Dan
|e verfasserin
|4 aut
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|a Knight, Tiffany M
|e verfasserin
|4 aut
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|i Enthalten in
|t Conservation biology : the journal of the Society for Conservation Biology
|d 1999
|g 23(2009), 3 vom: 01. Juni, Seite 719-28
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|x 1523-1739
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|g volume:23
|g year:2009
|g number:3
|g day:01
|g month:06
|g pages:719-28
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