Reports and documents by IAE staff.  

Timber harvest and Cypripedium montanum: Results of a long-term study on the Medford District BLM


This report summarizes results from a long-term study of mountain lady’s slipper (Cypripedium montanum) on the Medford District, Bureau of Land Management (BLM). This orchid is currently a Survey and Manage vascular plant species with the BLM and the U.S. Forest Service. Populations of this orchid were monitored from 1984 through 1998 in the Foots […]

Astragalus mulfordiae: Population dynamics and the effect of cattle grazing in the Vale district BLM

Erin Gray, Meaghan Petix, and Matt Bahm   2015

This document summarizes monitoring of Astragalus mulfordiae (Mulford’s milkvetch) on land managed by the BLM Vale District.  In 2015, we monitored plots testing for effects of herbivory on A. mulfordiae in permanent plots along with transects looking at long-term population trends and plant community composition. In 2015 we observed an increase in densities of A. […]

Conservation assessment for Cypripedium fasciculatum and Cypripedium montanum

Thomas N. Kaye and Jennie R. Cramer   2005

Purpose The impetus for developing the Conservation Assessment for Cypripedium fasciculatum and Cypripedium montanum arose from the Sierra Nevada Forest Plan Amendment Environmental Impact Statement, 2001. While, the primary goal of this document is to determine the conservation status of these species throughout the Sierra Nevada, the document’s scope also includes discussion of both species […]

The role of prescribed burning in maintenance of an endangered plant species, Lomatium bradshawii

K. L. Pendergrass, et al.   1999

Responses of a federally listed endangered plant species, Lomatium bradshawii, to the use of fire as a management tool for maintaining remnant wetland prairies were evaluated at two public land areas in the Willamette Valley of western Oregon. Areas containing L. bradshawii were treated with two or three fall season prescribed burns during a nine-year […]

Stochastic demography and conservation of an endangered perennial plant (Lomatium bradshawii) in a dynamic fire regime

Hal Caswell and Thomas N. Kaye   2001

Lomatium bradshawii is an endangered herbaceous perennial plant found in grassland and prairie remnants in western Oregon and southwestern Washington. Fire was historically in important and highly dynamic component of the environment of L. Bradshawii. Evaluating the demographic consequences of a dynamic environment requires a model for the environment and a coupling between that model and […]

The effect of fire on the population viability of an endangered prairie plant

Thomas N. Kaye, et al.   2001

We examined the effects of fire on population growth rate and extinction probability of a rare prairie plant. Lomatium bradshawii (Apiaceae) is an endangered species of western Oregon and Washington prairies that were frequently burned by Native Americans prior to the late 1800s. Using data from mapped plants in two populations subjected to different fall […]

Lupinus oreganus on the BLM Roseburg District: population monitoring and restoration

Giles-Johnson, Denise E.L.   2013

This document reports preliminary findings and summarizes methods used in monitoring the threatened species Lupinus oreganus on the BLM Roseburg District. In 2013, the eleventh year of the project, we monitored L. oreganus populations by assessing foliar (leaf) cover (a measure of abundance) and counting racemes, and numbers of fruits produced at a total of […]

Kincaid’s lupine (Lupinus oreganus) and habitat monitoring at Fir Butte

Andrea S. Thorpe   2011

One of the largest known extant populations of Kincaid’s lupine occurs at Fir Butte, located northwest of Eugene, Oregon. The overall habitat quality at the site is poor, with heavy infestations of alien plants such as Rubus armeniacus (blackberry), Cytisus scoparius (Scotch broom), Centaurea pratensis (meadow knapweed), and Arrhenatherum elatius (tall oatgrass). These non-native plants […]

Population monitoring for Lupinus oreganus (Kincaid’s lupine) at Eagle’s Rest

Denise E. L. Giles-Johnson and Erin C. Gray   2012

This report documents the tenth year of monitoring for the Lupinus oreganus (Kincaid’s lupine) population located at Eagle’s Rest, managed by the Eugene District of the Bureau of Land Management (BLM). Monitoring will provide the BLM with information on population status and long-term trends and supply baseline data to help understand and predict the response […]

Population and habitat monitoring for Kincaid’s lupine and Hitchcock’s blue-eyed grass at Oak Basin

Denise Giles-Johnson, Erin C. Gray, and Tara Callaway   2014

This report documents research conducted on population dynamics and habitat for of Kincaid’s lupine (Lupinus oreganus), a threatened species in the legume family, and Hitchcock’s blue-eyed grass (Sisyrinchium hitchcockii), a federal species of concern, at Oak Basin. Kincaid’s lupine serves as the primary larval host plant for the endangered Fender’s blue butterfly (Icaricia icarioides fenderi). […]