Reports

Reports and documents by IAE staff.  

Restoration of Willamette Valley upland prairies at Fern Ridge Lake

Erin C. Gray and Matt A. Bahm   2015

Fern Ridge Research Natural Area (RNA) is a cluster of remnant prairie sites within the southern Willamette Valley, managed by the Bureau of Land Management Eugene District. The Fern Ridge master plan provides these sites with wildlife habitat or environmentally sensitive land use designations. The current rare species management plan and Biological Opinion place primary emphasis on activities to benefit […]

Minimum population size for reproduction in Willamette daisy

Thomas N. Kaye, et al.   2006

SUMMARY We located and visited 20 populations of Willamette daisy with a range of population sizes (<10 to >4000), representing the majority of remaining locations of this species. We counted all flowering individuals in all populations (or used current population sizes as determined by others), and collected mature flower heads from each population. We determined […]

Estuary Assessment: Component XII of the Oregon Watershed Assessment Manual

Laura Brophy   2007

This estuary assessment and prioritization method constitutes Component XII of the Oregon Watershed Assessment Manual (Watershed Professionals Network 1999). This module can serve as a stand-alone method, but is best used as a component of the larger assessment. Conducting a full assessment provides the best understanding of the watershed continuum from ridgetop to ocean. Introductory material in […]

Common ground and controversy in native plant restoration: the SOMS debate, source distance, plant selections, and a restoration- oriented definition of native

Thomas N. Kaye   2001

Propagation and planting of native plants for habitat restoration is a multi-faceted process. There are many issues over which there is general agreement among restorationists, but there are a number of subjects that cause disagreement. For example, restorationists often agree that native plants should be emphasized, but disagree over where seeds or transplants should come […]

Climate change vulnerability assessment for West Eugene Wetland species

Thomas N. Kaye, Ian Pfingsten, Trevor Taylor and Emily Steel   2013

Local climate is one important factor that controls species distributions,range, phenology, and ability to compete with non-native species, among many effects. To preserve rare grassland species, manage and restore grassland habitat, and maintain communities that are resilient to climate change in the Pacific Northwest (PNW), land managers and restoration practitioners in the Willamette Valley (WV) need […]

Controlling meadow knapweed with manual removal, mulching, and seeding

Andrea S. Thorpe, Ph.D. and Rob Massatti   2008

Meadow knapweed (Centaurea pratensis) is an invasive forb that is a fertile hybrid between two European species that are also invasive in the United States. Meadow knapweed is prevalent across Oregon, Washington, Montana, and Idaho. Particularly in western Oregon, populations of meadow knapweed have been rapidly expanding and new infestations are frequently found. Although meadow knapweed appears […]

Testing for nativity, competitive, or allelopathic effects in interspecific interactions of Centaurea pratensis (meadow knapweed)

Erin C. Gray and Andrea S. Thorpe   2011

Comparisons of invasive species in their native and introduced ranges are rare, but offer insights into which mechanisms may contribute to their invasion potential in novel environments. Though competition is considered a major mechanism for invasive species success in novel environments, allelopathy (the negative effect of one plant on another through the release of chemical compounds) […]

Botanical implementation and validation monitoring of project buffers

Andrea S. Thorpe   2008

Areas selected for timber harvest often contain rare and threatened species that are known to prefer interior and/or old forest habitats. Because of this, areas of uncut forest are frequently left where these species are known to occur in order to provide refuge habitat. However, because these patches are surrounded by cut forest, the may […]

Botanical implementation and validation monitoring of project buffers; second year report

Andrea S. Thorpe   2009

Areas selected for timber harvest often contain rare and threatened species that are known to prefer interior and/or old forest habitats. Because of this, areas of uncut forest are frequently left where these species are known to occur in order to provide refuge habitat. However, because these patches are surrounded by cut forest, the may […]

Botanical implementation and validation monitoring of project buffers; third year report

Andrea S. Thorpe   2010

Areas selected for timber harvest often contain rare and threatened species that are known to prefer interior and/or old forest habitats. Because of this, areas of uncut forest are frequently left where these species are known to occur in order to provide refuge habitat. However, because these patches are surrounded by cut forest, the may […]