Currin, Rebecca E. , Meinke, Robert J. .
Establishing Two Experimental Populations of Wolf's Evening Primrose (Oenothera wolfii) on the Southern Oregon Coast.
OENOTHERA wolfii (Wolf’s evening primrose) is a biennial to short-lived perennial endemic to beach habitats in northwestern California and southwestern Oregon. O. wolfii faces several imminent threats, including habitat loss and alteration due to coastal development, roadside maintenance, and competition with exotic species, and hybridization with the common garden escape O. glazioviana. The goals of this study were to develop reintroduction protocol for O. wolfii, and then establish two experimental populations of this rare plant in administratively protected sites within the species’ historic range. Oenothera wolfii seeds germinated easily with no vernalization or scarification treatment, and the cultivation of O. wolfii in the greenhouse was similarly lacking in obstacles – almost all of the germinated seedlings survived transplantation into pots, and plants grew quickly and healthily in the greenhouse. Initial results from the experimental reintroduction of O. wolfii at two study sites are promising, with high transplant survival and reproduction rates. There was no statistically significant difference between the survival rates of propagules of different sizes, but larger propagules were more likely to reproduce in the first year after transplanting. Removal of ground cover at reintroduction sites did not significantly impact survival rates of transplants, but it did positively impact reproduction rates at one of the sites.
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1 - Oregon State University/Oregon Department of Agriculture, Department of Botany and Plant Pathology, 2082 Cordley, Corvallis, Oregon, 97331, USA
2 - Oregon State University, Department of Botany & Plant Pathology, 2082 Cordley Hall, Corvallis, Oregon, 97331-2902, USA
Presentation Type: Poster:Posters for Topics
Location: Auditorium/Bell Memorial Union
Date: Tuesday, August 1st, 2006
Time: 12:30 PM