CharronGagnon1991
Référence
Charron, D., Gagnon, D. (1991) The demography of northern populations of Panax quinquefolium (American ginseng). Journal of Ecology, 79(2):431-445.
Résumé
Panax quinquefolium in S Quebec reaches its northern limit of distribution in North America. All four examined populations possessed similar size-structure and flowering patterns. There was a net dominance of individuals of reproductive stages over non-reproductive individuals and annual mortality was higher for smaller plants (69-92%) than for larger ones (<10%). Differences were detected between the four populations with respect to reproductive and mortality rates. Values of ? (population growth rate) varied from 0.87-1.19. Elasticity analyses revealed that changes affecting size classes 3 and 4 (largest plants) had the highest impact on the populations. Simulations of the effects of harvesting plants showed that 0% (poor growing season) to 16% (good growing season) of the individuals of each size class of a population can be harvested without threatening population survival. -from Authors
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@ARTICLE { CharronGagnon1991,
AUTHOR = { Charron, D. and Gagnon, D. },
TITLE = { The demography of northern populations of Panax quinquefolium (American ginseng) },
JOURNAL = { Journal of Ecology },
YEAR = { 1991 },
VOLUME = { 79 },
PAGES = { 431-445 },
NUMBER = { 2 },
NOTE = { 00220477 (ISSN) Cited By (since 1996): 49 Export Date: 25 April 2007 Source: Scopus Language of Original Document: English },
ABSTRACT = { Panax quinquefolium in S Quebec reaches its northern limit of distribution in North America. All four examined populations possessed similar size-structure and flowering patterns. There was a net dominance of individuals of reproductive stages over non-reproductive individuals and annual mortality was higher for smaller plants (69-92%) than for larger ones (<10%). Differences were detected between the four populations with respect to reproductive and mortality rates. Values of ? (population growth rate) varied from 0.87-1.19. Elasticity analyses revealed that changes affecting size classes 3 and 4 (largest plants) had the highest impact on the populations. Simulations of the effects of harvesting plants showed that 0% (poor growing season) to 16% (good growing season) of the individuals of each size class of a population can be harvested without threatening population survival. -from Authors },
KEYWORDS = { American ginseng demography ginseng Canada, Quebec Panax quinquefolium },
OWNER = { brugerolles },
TIMESTAMP = { 2007.12.05 },
}
