Dynamics of threatened goldenseal populations and implications for recovery

Sinclair, Adrianne; Nantel, Patrick; Catling, Paul M.

doi:10.1016/j.biocon.2004.12.004

Cited by 22 publications

(13 citation statements)

References 18 publications

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“…Our classification of H. canadensis life history stages was similar to that of Sinclair and Catling (2005), except we recognized 3, rather than 2 size classes of sterile plants and did not segregate newly produced ramets as separate life history stages. We also recognized dormant seeds after our field experiments indicated they were present.…”

Section: Population Growth Modelmentioning

confidence: 68%

“…While vegetative reproduction has been assumed to be important in H. canadensis populations (Davis 1999;Van der Voort et al 2003;McGraw et al 2003;Sinclair et al 2005), tracking of new ramets from buds had not been done before. Sinclair et al (2005) assumed each new ramet was derived from the ramet it was immediately adjacent to. However, our excavation of ramets in the field found the parent plant could be [ 60 cm from the daughter ramet, with connections often bypassing other plants.…”

Section: Sexual Versus Vegetative Recruitmentmentioning

confidence: 99%

“…Our subdivision of steriles into three size classes, rather than two as done by Sinclair and Catling (2005), enabled us to better quantify recruitment and model its role in population growth. Their 'small vegetative' class included all plants with leaf width B12.5 cm, so it would include most of our 'medium sterile' class (5-15 cm) as well as our 'small steriles.'…”

Section: Sexual Versus Vegetative Recruitmentmentioning

confidence: 99%

“…Population trends during recovery following harvesting have been documented Sanders and McGraw 2005), but the only comprehensive study of natural H. canadensis populations was done at the northern limit of its range (Sinclair et al 2005). This study did not observe recruitment from seed, and it modeled population dynamics assuming only asexual reproduction.…”

Section: Introductionmentioning

confidence: 99%

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Population dynamics of goldenseal (Hydrastis canadensis) in the core of its historical range

Christensen

Gorchov

2010

Plant Ecol

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Goldenseal, Hydrastis canadensis L. (Ranunculaceae), is a perennial woodland herb of eastern North America harvested for the medicinal properties of its rhizome. Although listed in Appendix II of the Convention on Trade in Endangered Species, little is known of its population dynamics in the core of its historical range. We investigated the demography of wild populations at three forest interior sites in Ohio, including both sexual and asexual reproduction, in order to model population dynamics in the core of its historical range. We recognized six life history stages, and parameterized stage-structured (Lefkovich) transition matrices for each population. Marked individuals were monitored and field experiments were conducted to characterize and quantify seed dormancy, seedling establishment, and vegetative reproduction. We found seedling recruitment to be more common than suggested by previous studies, but less common than vegetative reproduction, and less important to projected population growth. The finite rate of increase, k, was greater than 1 for each population based on transition matrices for 1998-1999, but much less than 1 for two populations (and &1 for the third) based on 1999-2000 matrices. This reduction in k appears due to lower survival and growth of established (non-seedling) plants, which may have been due to drought in spring 1999. In both year-to-year transitions, fertile plants typically regressed to the large sterile stage. This research provides a basis for exploring the effects of different harvest strategies on the population dynamics of H. canadensis, enabling assessment of sustainability.

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Section: Population Growth Modelmentioning

confidence: 68%

Section: Sexual Versus Vegetative Recruitmentmentioning

confidence: 99%

Section: Sexual Versus Vegetative Recruitmentmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Population dynamics of goldenseal (Hydrastis canadensis) in the core of its historical range

Christensen

Gorchov

2010

Plant Ecol

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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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