Reports

Reports and documents by IAE staff.  

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 […]

Seed dormancy in high elevation plants: implications for ecology and restoration

Thomas N. Kaye   1997

Seed germination is a crucial event in the life of every sexually reproduced higher plant. A portion of the seeds of many species are dormant; they do not germinate unless specific environmental signals or events occur. The objective of this research was to determine the extent of seed dormancy in 28 species of grasses and […]

Reviving the connection between children and nature: through service-learning restoration partnerships

Jennie R. Cramer   2008

Engaging students in environmental restoration through service-learning partnerships is an effective tool for restoring native ecosystems while simultaneously rebuilding relationships between children and nature and inspiring future stewards of the land. Place-based education provides a framework for connecting students to the land. Stewardship-based service-learning provides a productive means by which to accomplish both education and […]

Polycross populations of the native grass Festuca roemeri as pre-varietal germplasm: their derivation, release, increase, and use

Dale C. Darris, et al.   2008

Results of a recent common-garden study provide evidence needed to delineate appropriate seed transfer zones for the native grass Festuca roemeri (Pavlick) E. B. Alexeev (Poaceae). That information has been used to develop pre-variety germplasm releases to provide ecologically and genetically appropriate seeds for habitat restoration, erosion control, and other revegetation projects in 5 regions […]

Patterns of rarity in the Oregon flora: implications for conservation and management

Thomas N. Kaye, et al.   1997

Threatened and endangered species are a significant component of Oregon’s flora, comprising 0.2% to over 15% of the state’s plant taxa, depending on one’s definition of endangerment. With such a potentially large group of plants to conserve, generalizations regarding types of rarity and threats to these species would help improve our basic understanding and management […]

The Willamette Valley Seed Increase Program: Developing genetically diverse germplasm using an ecoregion approach

Kimiora Ward, et al.   2008

The goal of the Institute for Applied Ecology’s Willamette Valley Seed Increase Program is to develop a supply of ecologically appropriate, genetically diverse native plant material for restoration of prairie ecosystems in the Willamette Valley. In creating restoration germplasm we seek to maximize genetic diversity while simultaneously protecting genetic integrity of extant native populations. In […]

Seed transfer zones for a native grass Festuca roemeri

Barbara L. Wilson, et al.   2008

A common-garden study of Festuca roemeri (Pavlick) E. B. Alexeev (Poaceae) revealed substantial genetic variation within and among 47 populations from throughout its range in the Pacific Northwest, US, for growth, fitness, phenological, and morphological traits. Using climatic and physiographic variables, genetic patterns over the landscape were examined through principal component and regression analysis. Elevation […]