The Demography of Northern Populations of Panax Quinquefolium (American Ginseng)

Charron, Danielle; Gagnon, Daniel

doi:10.2307/2260724

Cited by 117 publications

(100 citation statements)

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“…For example, they can be used to identify the most important life-history stage or process to the population growth of a species, information which can be used to guide decisions with the objective of sustaining or increasing the population size of rare species (e.g., Charron and Gagnon 1991;Maschinski et al 1997;Kaye et al 2001) or to target and decrease the population size of invasive species (e.g., Maxwell et al 1988;Shea and Kelly 1998;McEvoy and Coombs 1999;Parker 2000). A further application of demographic analyses to invasive plant study is they can provide valuable, but often ignored, insights into the connection between theories of plant invasions and quantitative field data, such as determining whether population growth remains constant throughout the stages of invasion (Parker 2000).…”

Section: Introductionmentioning

confidence: 99%

Population demographics and trade-offs to reproduction of an invasive and noninvasive species of Rubus

Lambrecht-McDowell

Radosevich

2005

Biol Invasions

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Do trade-offs between growth and reproduction differ between an invasive and noninvasive plant species and how do such trade-offs relate to population demographics? To help address these questions, we compared demographics for an invasive plant species, Rubus discolor, with a noninvasive congener, R. ursinus, in several populations of varying density. Removal of floral buds from reproductive canes increased the size of juvenile canes that arose from clonal sprouting in R. ursinus, suggesting a trade-off between current reproduction and growth. Removal of floral buds had no effect on growth of R. discolor. R. ursinus displayed trade-offs between reproduction (sexual and vegetative) and future growth based on negative correlations between leaf area production and both clonal sprouting and seedling production during the previous year. R. discolor did not exhibit these trade-offs. Both species had high population growth rates in low-density populations, but exhibited little or no growth in high-density populations. A life table response experiment was used to determine the underlying cause for the effect of density on population growth. For R. ursinus, lack of population growth in high-density populations was due primarily to increased mortality of clonally sprouting canes, while for R. discolor, it was due to decreased clonal cane production. Elasticity analysis revealed that clonal growth was more important than sexual reproduction for population growth of both species. However, elasticity values for sexual reproduction in R. discolor were greater in high-than low-density populations. This suggests an increased reliance on sexual reproduction in populations that had reached stable sizes, which could increase the capacity of R. discolor to disperse to new sites. Elasticity analyses were also used to simulate the efficacy of various control strategies for R. discolor. Control of this species could be attained by reducing clonal production within existing populations while reducing seed production to limit establishment of new populations.

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Section: Introductionmentioning

confidence: 99%

Population demographics and trade-offs to reproduction of an invasive and noninvasive species of Rubus

Lambrecht-McDowell

Radosevich

2005

Biol Invasions

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“…The stem bears a whorl of leaves each with 3-5 leaflets. Under good growth conditions, a new leaf may be added each year up to a maximum of five or six leaves (Charron & Gagnon 1991), but under poor growth conditions it may take several years before each new leaf is 256 New Zealand Journal of Crop and Horticultural Science, 2000, Vol. 28 added.…”

Section: Introductionmentioning

confidence: 99%

Effect of shade on growth and photosynthesis ofPanax ginseng

Parmenter

Littlejohn²

2000

New Zealand Journal of Crop and Horticultural Science

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“…Collection from wild populations is a concern since many species are slow-growing perennials with low fecundity and/or juvenile recruitment rates (Bierzychudek 1982;Charron and Gagnon 1991;Meagher and Antonovics 1982;Sinclair et al 2005). Harvest of these species removes all or a significant portion of the root or rhizome, resulting in high mortality.…”

Section: Introductionmentioning

confidence: 99%

Transitioning from wild collection to forest cultivation of indigenous medicinal forest plants in eastern North America is constrained by lack of profitability

Burkhart

Jacobson

2008

Agroforest Syst

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The forest flora of eastern North America includes many herbaceous plant species traded in domestic and international medicinal markets. Conservation concerns surrounding wild-collection exist and transitioning to cultivation in agroforestry systems has potential economic and ecological benefits. Costs and revenues associated with adopting forest cultivation were modeled for eight North American medicinal forest plants. Sensitivity analysis examined profit potential in relation to (1) discount rates; (2) propagation methods; (3) prices; (4) growing period; (5) production costs; and (6) yields. Results indicate that intensive husbandry of six of eight species would be unprofitable at recent (1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003)(2004)(2005) price levels. Exceptions are American ginseng (Panax quinquefolius L.), and under certain circumstances (e.g.

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The Demography of Northern Populations of Panax Quinquefolium (American Ginseng)

Cited by 117 publications

References 0 publications

Population demographics and trade-offs to reproduction of an invasive and noninvasive species of Rubus

Population demographics and trade-offs to reproduction of an invasive and noninvasive species of Rubus

Effect of shade on growth and photosynthesis ofPanax ginseng

Transitioning from wild collection to forest cultivation of indigenous medicinal forest plants in eastern North America is constrained by lack of profitability

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