Reports and documents by IAE staff.
Direct and indirect effects of host plants: Implications for reintroduction of an endangered hemiparasitic plant (Castilleja levisecta)
Beth A. Lawrence and Thomas N. Kaye 2008Rare, parasitic plants pose an interesting challenge to restoration practitioners. In addition to the problems associated with small population size, rare parasites may also be limited by their host requirements. We examined how the performance of a rare Pacific Northwest hemiparasite, Castilleja levisecta, was affected by the availability of different host combinations in the greenhouse […]
An evaluation of the potential for hybridization between Castilleja levisecta and C. hispida
Kay, Thomas N. and Matt Blakeley-Smith 2008Catilleja levisecta (Golden paintbrush) is listed as Endangered Species by the US Fish and Wildlife Department. The Recovery Plan for C. levisecta identifies population reintroduction, development of propagation methods, and studies of the pollination biology of the species as high priority actions to meet recovery objectives. A second paintbrush species, C. hispida (harsh paintbrush), also occurs in prairies along […]
Fitness effects of inbreeding and outbreeding on golden paintbrush (Castilleja levisecta): Implications for recovery and reintroduction
Thomas N. Kaye and Beth Lawrence 2003In this paper we examine the mating system of Castilleja levisecta and explore the effects of inbreeding and outbreeding on progeny fitness at multiple life history stages. The results have direct bearing on reintroduction and recovery actions for the species because the risks associated with inbreeding and outbreeding need to be identified in order to […]
Fritillaria gentneri population monitoring at Pickett Creek, Josephine County, Oregon
Denise E. L. Giles-Johnson, et al. 2013Over the twelve years of this study we have noted a startling drop in the number of flowering individuals of Fritillaria gentneri at the Pickett Creek population in the Medford District of Oregon. At the initiation of the study, in 2002, the population numbered above 400 reproductive plants with an estimated population size of 13,294 […]
Practical guidelines for wetland prairie restoration in the Willamette Valley, Oregon: Field-tested methods and techniques
Krueger, Jeffrey J., S.T. Bois, T.N. Kaye, D.M. Steeck, T.H. Taylor 2014The science of wetland prairie restoration has made significant strides in recent years, building on lessons learned locally in Oregon and Washington and on applied research and practice from around the country. The content of this guide is based on a variety of sources including the findings of several EPA funded replicated field experiments conducted […]
Restoring rare native habitats in the Willamette Valley
Campbell, Bruce H. 2004In this volume you will find detailed guidance on the mechanics of re-establishing functioning examples of the Willamette Valley’s rare native habitats. Much of the information is drawn from a wide variety of published sources, in some cases from other regions if no more local knowledge was available. But much of it is also the […]
Lupinus lepidus var. cusickii population monitoring in Denny Flat, Baker County, Oregon
Charlotte C. Trowbridge, et al. 2012The 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 2010The 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 […]
Developing reintroduction techniques for Lomatium cookii
Thomas N. Kaye, et al. 2013The 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, […]
Lomatium cookii population monitoring in the Illinois Valley, Josephine County, Oregon
Ian A. Pfingsten, et al. 2013Lomatium 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 […]