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- Title
Distribution, Abundance, and Population Dynamics of Goldenseal (Hydrastis canadensis L.) in an Indiana Nature Preserve, USA.
- Authors
Sanders, Suzanne M.; McGraw, James B.
- Abstract
The expanding market for herbal remedies has stimulated increased harvest of goldenseal (Hydrastis canadensis L.) from the wild. We examined net population change of H. canadensis over 26 years in Bryan Nature Preserve, central Indiana, USA. Individuals were mapped and censused in 0.1 ha quadrats over the entire preserve, repeating a similar procedure carried out by others in 1974. The net trajectory of abundance was negative: H. canadensis was present in 46 quadrats in 1974, but had become extinct in 31 of those quadrats and decreased in 15; three quadrats contained new patches. Only 10 of the 99 patches present in 1974 were relocated. Fifteen new patches were found in 2000. The total number of quadrats with H. canadensis declined between the two censuses. The number of quadrats in which the abundance trajectory was positive between the two time periods was significantly less than the number showing a negative trajectory. Patches in edge quadrats had higher survival than those in the interior. Extinction probability was not dependent on population size. There is no known cause of the decline in H. canadensis in the preserve, although one possibility is the damage from a severn wind and ice storm that occurred in February 1991. Harvest history is unknown, although recent harvest was not evident. Periodic recensusing of this preserve is needed to understand the causes of H. canadensis decline.
- Subjects
INDIANA; UNITED States; GOLDENSEAL; NATURE reserves
- Publication
Natural Areas Journal, 2002, Vol 22, Issue 2, p129
- ISSN
0885-8608
- Publication type
Article