Threat assessment for Limnanthes pumila ssp. pumila (dwarf woolly meadowfoam) on Table Rocks ACEC

Petix, Meaghan I., Erin C. Gray, and Matt A. Bahm   2017

EXECUTIVE SUMMARY Upper and Lower Table Rocks, located northeast of Medford, Oregon, are collectively designated as an Area of Critical Environmental Concern (ACEC) by the Bureau of Land Management (BLM). The Table Rocks are characterized primarily by vernal pool and mound habitats that support several rare species. Since 2006, the Institute for Applied Ecology (IAE) […]

Habitat and population monitoring for Chloropyron maritimum ssp. palustre and Limonium californicum on the Coos Bay North Spit

Denise E.L. Giles, Erin C. Gray, Matt A. Bahm, and Thomas N. Kaye   2017

In 2017 the estimated number of Chloropyron maritimum ssp. palustre plants on the Coos Bay North Spit land managed by the Coos Bay District of the Bureau of Land Management is ~570,000, an increase from 2016 values.

In 2017 the population of Limonium californicum decreased from those observed in 2016, and is estimated to be ~564,000.

Habitat mapping from 2011-2017 has shown a shift towards more Limonium californicum dominant habitat types, and an increase in the non-native Juncus gerardii in recent years.

Clatsop Plains – Long Beach Peninsula Coastal Prairie Restoration

Bahm, Matt A. and Meaghan I. Petix   2017

EXECUTIVE SUMMARY In 2017, treatments varied by site and establishment of seeded species was low across sites. Overall, soil removal treatments showed the most promise across sites. Soil removal plots had lower cover of invasive grasses and forbs and offered more potential management action(s). Future monitoring will help to elucidate treatment effectiveness and aid in […]

Analysis of the effects of climate and environment on Fritillaria gentneri flowering

Erin C. Gray, Matt A. Bahm, and Meaghan I. Petix   2017

  We used non-parametric multiplicative regression (NPMR) to model the effects of climate and environmental variables on flowering of Fritillaria gentneri from 57 sites throughout its range in southern Oregon. We report 4 models using different sites in an attempt to find the strongest predictors for flowering of F. gentneri: In Model 1(51 sites), number […]

Abating climate change impacts on Kincaid’s lupine, 2017 report

Erin C Gray and Matt A Bahm   2017

This document summarizes monitoring of reintroductions of Kincaid’s lupine in multiple microclimates at three sites in the Willamette Valley, Oregon.  Over the years of this study, we have found that seed source and microclimate both affect emergence, survival, and growth (height and number of leaves).  Results will inform future management considerations regarding seed transfer zones […]

Outplanting Survival of Bartonberry (Rubus bartonianus)

Bahm, Matt A. and Meaghan I. Petix   2017

EXECUTIVE SUMMARY From November 14-17, 2016, we outplanted 2173 individual Bartonberry (Rubus bartonianus) seedlings into 3 locations in Hells Canyon. The sites were located near the Baker and Wallowa County boundary, with the Reservoir and Copper Creek sites adjacent to the Snake River and the Hess Road site located in the Ashby Creek drainage southwest […]

Controlling exotic grasses while maintaining native plant communities in fire-maintained wet prairies

Bahm, Matt A., Andrew T. Esterson, and Erin C. Gray   2016

EXECUTIVE SUMMARY Overall, several treatment(s) show promise for individual aspects that we were considering (Anthoxanthum odoratum cover, native species cover, and exotic species cover). Currently, no individual treatment tested provides desired levels of all of the measured variables. Future monitoring is necessary to continue to refine the management techniques and provide the most accurate recommendations. […]

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

Pfingsten, I.A., Denise E.L. Giles, and Thomas N. Kaye   2016

EXECUTIVE SUMMARY 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 […]

Assessing Management Techniques for Lomatium Cookii (Cook’s desert-parsley)

Giles, Denise E.L., Matt A. Bahm, and Meaghan Petix   2016

EXECUTIVE SUMMARY This document summarizes results from two studies involving habitat management techniques for L. cookii to support recovery of the species. The studies include 1) an evaluation of herbicide effects at Illinois Forks State Park, and 2) the effects of prescribed fire on L. cookii and the surrounding plant community at French Flat Middle […]

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

Giles, Denise, Andrew Esterson, and Matt Bahm   2016

This report documents research conducted on population characteristics and habitat of Kincaid’s lupine (Lupinus oreganus), a threatened species, 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). Both species are endemic to […]

Population assessment of Pyrrocoma radiata (Snake River goldenweed)

Petix, Meaghan I., Matt A. Bahm, and Sarah K. Uebel   2016

The Institute for Applied Ecology monitored populations of Pyrrocoma radiata (Snake River goldenweed) on land managed by the BLM Vale District in 2015 and 2016. • We monitored 26 sites occurring on Vale BLM lands in 2015, including 1 previously undocumented site. o Identified 1 previously undocumented population. o Counted/estimated 16,368 plants, with sites ranging […]

Abronia umbellata ssp. breviflora on the Oregon coast: Reintroduction and population monitoring

Giles, Denise E.L., and Tom N. Kaye   2016

EXECUTIVE SUMMARY Pink sand-verbena (Abronia umbellata ssp. breviflora) is listed as endangered by the Oregon Department of Agriculture, and a Species of Concern by the U.S. Fish and Wildlife Service. Since the late 1970’s, the number of natural populations in Oregon has decreased by approxiamately 50% (~10 to ~5). The primary threats to the species […]