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Demographic analysis of Erigeron decumbens var. decumbens, an endangered plant species of the Willamette Valley, Oregon
Erigeron decumbens var. decumbens, known only from the Willamette Valley of western Oregon, is listed as Endangered by the U.S. Fish and Wildlife Service and by the state of Oregon. In […]
Fire effects on wetland prairie species
Wetland prairies of the Willamette Valley, considered among the rarest of Oregon’s ecosystems, are threatened by invasion of woody species and non-native species. Because of its historical importance, fire is a […]
Puget Sound Ecological Fire Program: 2017 Summary Report
The 2017 burn season is most notable in five ways: Unprecedented heavy smoke inundation in Puget Sound from big wildfires throughout the west An offsite wildfire that spread onto Scatter Creek […]
Promoting regeneration of native species in Willamette Valley Upland Prairies
Native prairies of the Willamette Valley are considered among the rarest of Oregon’s ecosystems and are in critical need of conservation. Management strategies for increasing the abundance of native species are […]
Controlling Woody Vegetation in Wetland Prairies (1994-2001)
The present study experimentally tested the responses of burning, hand-removal of woody species, and mowing with removal of cut material on woody plants and key native and non-native grasses and forbs. […]
Restoration of Fender’s blue butterfly and its prairie ecosystem: Management applications of fire to Baskett Slough NWR
We tested the recolonization ability of the Fender’s blue butterfly and monitored the vegetation response to a management-scale prescribed fire at the Baskett Slough National Wildlife Refuge, western Oregon. The prescribed […]
Increasing the abundance of rare native wetland prairie species
Native prairies of the Willamette Valley are considered among the rarest of Oregon’s ecosystems and are in critical need of conservation. Management strategies for increasing the abundance of native species are […]
YEAR ONE: Control of Brachypodium sylvaticum and Restoration of Rare Native Upland Prairie Habitat at Butterfly Meadows
Our project goal is to protect and restore rare Willamette Valley upland prairie habitat at Butterfly Meadows (Benton County) from invasion by the noxious weed Brachypodium sylvaticum (false brome). Native prairies, […]
Effects of soil nutrients and fire on seedling establishment of native prairie species
We sought to determine 1) the relationship between seedling establishment rates of target native prairie species and field levels of three soil nutrients (phosphate, nitrate, and ammonium) recorded in fall, winter, […]
Bee-Crossed Lovers and a Forbidden Castilleja Romance: Cross-breeding between C. hispida and endangered C. levisecta in prairie restoration sites
Castilleja levisecta (golden paintbrush) is one of Washington’s characteristic endangered species, restricted to the Pacific Northwest’s disappearing prairies. To establish new populations, C. levisecta was seeded into restoration plots with other […]