Lupinus oreganus in the BLM Roseburg District: population monitoring and restoration
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
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 raceme count was up from 2015 values at all sites monitored in the Roseburg BLM District. This is most likely due to a reduction in extremely hot days experienced in the Pacific Northwest in 2016 compared to 2015. Foliar cover remained relatively stable at most sites compared to 2015 values.
In 2012-2016, meadow knapweed (Centaurea pratensis) was found along the roadside at China Ditch near the end of the Patch C roadside transect. Flowering individuals were removed by IAE staff in 2014 and 2015, where feasible; however, it is recommended that the area continue to be monitored for the noxious weed which could quickly invade the surrounding L. oreganus population.
