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, in areas occupied and unoccupied with L. cookii and 2) the effects of prescribed fire on L. cookii and […]
Astragalus mulfordiae: Population dynamics and the effect of cattle grazing in the Vale District, BLMPetix, Meaghan I., Erin C. Gray, and Matt A. Bahm 2017
EXECUTIVE SUMMARY This document summarizes monitoring of Astragalus mulfordiae (Mulford’s milkvetch) on land managed by the BLM Vale District. In 2017, we monitored plots testing for effects of herbivory on A. mulfordiae in permanent plots along with transects monitoring long-term population trends and plant community composition. In 2017 we observed an increase in number of […]
Executive Summary This report documents monitoring 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 […]
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 from approximately 10 populations to less than 5. The primary threats to […]
EXECUTIVE SUMMARY This document reports initial work from seed collection, propagation, and outplanting of Lupinus oreganus for the Roseburg District Bureau of Land Management. Sites managed by the Roseburg BLM represent the southernmost range of this threatened plant species. Three sites were outplanted including Callahan Meadows (approx. 1,900 plants), Loose Laces (approx. 1,075 plants), and […]
EXECUTIVE SUMMARY In 2017, we monitored L. oreganus populations by assessing foliar (leaf) cover (a measure of abundance), raceme count, and fruit production at five different sites in the Roseburg BLM District. Foliar cover and raceme count increased from 2016 values at all sites monitored in 2017. Seed set increased at all sites, except Loose […]
EXECUTIVE SUMMARY This report documents work conducted on Kincaid’s lupine (Lupinus oreganus), a threatened species listed by the Oregon Department of Agriculture and the U.S. Fish and Wildlife Service, and the surrounding plant community at Fir Butte. Kincaid’s lupine serves as the primary larval host plant for the endangered Fender’s blue butterfly (Icaricia icarioides fenderi); […]
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 SpitDenise 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.
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 […]
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 […]
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 […]