Reports and documents by IAE staff.  

Lupinus lepidus var. cusickii population monitoring in Denny Flat, Baker County, Oregon

Charlotte C. Trowbridge, et al.   2012

The purpose of this project was to locate and resample the previously established L. lepidus var. cusickii monitoring plots. Specifically, we compared current population size and plant performance with data from previous years and analyzed differences between plots that were fenced and plots that were open to ORVs and cattle. This will provide the BLM […]

Assessing the status of Lupinus lepidus var. cusickii in Denny Flat, Baker County, Oregon

Rachel E. Newton and Andrea S. Thorpe   2010

The purpose of this project is to document all extant populations of L. lepidus var. cusickii on BLM managed land and develop restoration protocols. In 2010, our activities focused on determining the distribution of L. lepidus var. cusickii populations in the Denny Flat region of Baker County, estimating the size of populations, and determining potential […]

Population biology of Lomatium bradshawii II. Insect interactions, phenology, and breeding systems

Thomas N. Kaye and Melissa Kirkland   1994

Lomatium bradshawii (Bradshaw’s lomatium) is a state and federally listed endangered species that occurs in fragmented native-prairie habitat in western Oregon and southwestern Washington. A U.S. Fish and Wildlife Service recovery plan for the species identifies breeding- system and pollinator-availability research as needed for filling information gaps that could influence recovery efforts. We conducted field […]

Population trends of Lomatium bradshawii before and after prairie fires: 1988- 1997

Thomas N. Kaye   1998

A USFWS recovery plan for L. bradshawii (Parenti et al. 1993) targets population monitoring and enhancement as two actions needed to meet recovery objectives for the species. Population monitoring alone will not contribute to the species’ recovery unless it is combined with rigorous analysis to identify populations at risk and evaluate enhancement techniques. The goal […]

Developing reintroduction techniques for Lomatium cookii

Thomas N. Kaye, et al.   2013

The goal of this project was to develop reintroduction techniques for Lomatium cookii to support recovery of the species. The specific objectives of this study included: determining survival and growth of new individuals propagated from both seeds and root plugs, observing the effects of litter removal on  L. cookii transplant survival, testing for local adaptation of seeds sources, […]

Population viability analysis for the clustered lady’s slipper (Cypripedium fasciculatum)

Erin C. gray, et al.   2012

The purpose of this project was to survey populations of clustered lady’s slipper in the Medford District BLM in order to expand on earlier analyses and better model the probability of extinction [Population Viability Analysis (PVA)] for this species. The data collected suggest an ongoing trend of population decline and local extinction. Our data set includes […]

Lomatium cookii population monitoring in the Illinois Valley, Josephine County, Oregon

Ian A. Pfingsten, et al.   2013

Lomatium cookii is endemic to southwestern Oregon, and is listed as endangered by the State of Oregon and by the U.S. Fish and Wildlife Service (USFWS). Populations discussed in this report are located in the Illinois Valley in Josephine County. Long-term monitoring has occurred at French Flat since 1990, at Rough and Ready since 1994 […]

Habitat monitoring and improvement for Cordylanthus maritimus ssp. palustris

Giles-Johnson, Denise, Erin C. Gray and Thomas N. Kaye   2013

This project aims to monitor C. maritimus ssp. palustris populations within the North Spit of Coos Bay, Oregon. Through a combination of annual mapping and monitoring, we will track changes in population size and location through time. We will also test the effect interspecific competition on recruitment by experimentally removing neighboring species in a subset of the […]

A morphometric evaluation of Corydalis caseana and its subspecies with special attention to aquae-gelidae

Thomas N. Kaye   2001

A recently discovered population of Corydalis  at Traverse Creek, aka Saddle blanket Mtn. within the Willamette National Forest occurs in Lane County, south of the known range of cold-water corydalis and north of the known range of Sierra corydalis. Individuals in this population resemble cold-water corydalis but also appear intermediate between the two species in […]

Population trends, demography, and the effects of environment and disturbance on Cypripedium fasciculatum in Southern Oregon

Andrea S. Thorpe, et al.   2011

Cypripedium fasciculatum Kellogg ex S. Watson (clustered lady’s slipper, Orchidaceae) is a rare woodland orchid that can be found in scattered populations throughout northwestern North America. Although several studies have explored its relationship with mycorrhizal fungi and habitat associates, there has been little information on the species’ demography, including determining the likelihood that this species […]