Technical Report
 

Non-forest Plant Communities of the Northern Oregon Coast Range and Vicinity Draft Report

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  • DRAFT REPORT. In 2013 – 2015, reconnaissance observations were made across non-forest habitats on FS and BLM land in the Coast Range and Cascade foothills within the Salem and Eugene BLM district areas for plant communities that did not fit the USFS Northwest Oregon Non-forest Plant Community guide. Surveys were limited to prioritized selected USGS quad maps and some additional known special habitat areas. The objective was to sample a minimum of 5 plots per suspected new plant community across all topographic positions observed. Plots were placed to best represent the plant community. Environmental data and percent cover were recorded. Data from similar plant communities in the Non-forest Plant Communities of the northern Oregon Cascades (McCain et al. 2014) were combined with the new data and analyzed with One-Way Cluster Analysis using PC-ORD software (McCune & Mefford 2002) to determine group membership of the plots. Indicator Species Analysis was used to identify plant species indicators for each of the communities, and these were further tested in Multiple Response Permutation Procedures analysis in PC-ORD software, which tests membership among groups (McCune & Mefford 2002). Plant community groups were named based on most significant indicator species or highest constancy in the group. The plant community data set and a secondary matrix of field collected and calculated environmental data were run through Non-metrical Multidimensional Scaling Ordination (NMS) in PC-ORD software to examine community and environmental relationships. Cascade plant community plots reasonably separated from new plant community plots in cluster analysis. 12 plant communities that appear different than those found in the Cascades: Roemer’s fescue – coastal, Roemer’s fescue—high bald, blue wild rye, star-flowered lily-of-the-valley—California sedge, golden slenderbanner, California fescue, Virginia strawberry—California oatgrass, Oregon Sunshine –Coast Range, spreading phlox –Coast Range, Wallace’s spikemoss—Cascade desert parsley, rusty saxifrage—short camas, crevice alumroot—wood saxifrage. These plant communities are draft types and review is needed to determine final defined plant communities.
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  • Glavich, Doug. 2016. Non-forest Plant Communities of the Northern Oregon Coast Range and Vicinity, Draft Report. USFS Northwest Ecology Group. 51 pp.
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  • USFS Northwest Ecology Group
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  • 51 pages

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