Reports and documents by IAE staff.  

Fritillaria gentneri population monitoring at Pickett Creek, Josephine County, Oregon

Denise E. L. Giles-Johnson, et al.   2013

Over 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 […]

Fitness effects of inbreeding and outbreeding on golden paintbrush (Castilleja levisecta): Implications for recovery and reintroduction

Thomas N. Kaye and Beth Lawrence   2003

In 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 […]

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   2014

The 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.   2004

In 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.   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 […]