Distribution and status of endemic and non-native plant species at the Painted Hills unit of John Day Fossil Beds National Monument
Buechling A. 2008. Distribution and status of endemic and non-native plant species at the Painted Hills unit of John Day Fossil Beds National Monument. National Park Service
Populations of rare and selected non-native plant species were quantitatively surveyed throughout the Painted Hills unit of John Day Fossil Beds National Monument in 2007 and 2008. A total of 5 endemic plant species were mapped including Castilleja xanthotricha, Chaenactis nevii, Juncus torreyi, Pediocactus nigrispinus, and Penstemon eriantherus var. argillosus. A total of 1125 associated occurrences were identified and surveyed. Populations are generally stable with large plant numbers and few apparent threats affecting their persistence. A total of 15 non-native plants with 1364 associated occurrences were also surveyed and mapped. Populations of exotic species are extensive, but predominantly restricted to low elevation disturbed habitats in the vicinity of roads and creeks or to burned sites at high elevations. More than 80% of all detected weed occurrences were located within 400 m of a road, trail, or stream channel. Continued quantitative monitoring using standardized protocols is recommended in order to assess future population trajectories, evaluate the efficacy of management prescriptions, and to facilitate the early detection of additional introductions of potentially invasive non-native species.
- Type
- Published Report
- Authors
- Buechling, Arne
- Date of Issue
- 2008-12
- Publisher
- National Park Service
- Units
- JODA , UCBN
- Keywords
- Distribution, Endemic Plants, Invasive Plant Inventory, Invasive Plants, Non-Native Plants, Observations, Plant Survey, Presence (Biodiversity), Rare Plant Inventory, Rare Plants, Status, Vegetation Inventory