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 […]

Threat assessment for Limnanthes pumila ssp. pumila on Table Rocks ACEC

Erin C. Gray and Matt A. Bahm   2016

  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, including Limnanthes pumila ssp. pumila (née Limnanthes floccosa ssp. […]

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

Giles, Denise E.L, Andrew T. Esterson, and Matt A. Bahm   2016

Executive Summary This document reports preliminary findings and summarizes methods used in monitoring the threatened species Lupinus oreganus in the BLM Roseburg District.  In 2016, we monitored L. oreganus populations by assessing foliar (leaf) cover (a measure of abundance), raceme count, and fruit production at six different sites in the Roseburg District. Seed set and […]

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

Giles, D.E.L., E.C. Gray, and T.N. Kaye   2014

EXECUTIVE SUMMARY In 2014 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 ~1,511,000 (508,000 in the protected area and 1,003,000 in the unprotected area). This is the highest estimated population in the unprotected area, […]

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

Giles, Denise E.L., Erin C. Gray, Matt A. Bahm, and Thomas N. Kaye   2015

EXECUTIVE SUMMARY In 2015 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 ~1,516,000 (462,000 in the protected area and 1,053,000 in the unprotected area). This is the on par with the highest population estimate […]