Oregon has a rich history in the production of fruits, berries, vegetables, and ornamental crops; the state’s national and international reputation for delivering high-quality products is well-established and well-deserved. In the past, agriculture and forestry were the foundation of Oregon’s economy. Although other activities now are equal in size to...
'Santiamʼ (OSU 509.064) was developed and evaluated at Oregon State
University, Corvallis, Oregon, and it was released in February 2005. This cultivar has complete resistance to eastern filbert blight (EFB) caused by Anisogramma anomala (Peck) E. Müller. Resistance is conferred by a single dominant gene from ʻGasaway.ʼ Compared to ʻBarcelona,...
Pesticides—including insecticides, acaricides, fungicides, and bactericides are essential for growing healthy crops with reliable yields and quality. In many instances, pesticides have become less effective as target organisms have developed resistance. The first record of resistance dates to 1897, when orchardists began having problems controlling San Jose scale (Quadraspidiotus perniciosus...
The rhenium-osmium isotopic system has the potential to track the maturation of arc crust at lower crustal levels because the ¹⁸⁷Os/¹⁸⁸Os in magmas is sensitive to the age and composition of crust with which they interact. We here present Re and Os isotopic data for a suite of samples from...
Environmental challenges are complex and require expertise from multiple disciplines. Consequently, there is growing interest in interdisciplinary
environmental research that integrates natural and social science, an often arduous undertaking. We surveyed researchers interested and experienced
in research at the human–environment interface to assess perspectives on interdisciplinary research. Integrative interdisciplinary research...
Invasions have increased the size of regional species pools, but are typically assumed to reduce native diversity. However, global-scale tests of this assumption have been elusive because of the focus on exotic species richness, rather than relative abundance. This is problematic because low invader richness can indicate invasion resistance by...
Multiple episodes of Oligocene and younger silicic volcanism are represented in the high lava plateau of central and southeastern Oregon. From 12 Ma to Recent, volcanism is strongly bimodal with nearly equal volumes of basalt and rhyolite. It is characterized by moderate to high silica (SiO₂ > 72 wt. %)...
Feedback loops involving soil microorganisms can
regulate plant populations. Here, we hypothesize that microorganisms
are most likely to play a role in plant–soil feedback
loops when they possess an affinity for a particular plant and
the capacity to consistently affect the growth of that plant for
good or ill. We...
Studies of experimental grassland communities¹⁻⁷ have demonstrated
that plant diversity can stabilize productivity through species
asynchrony, in which decreases in the biomass of some species
are compensated for by increases in others[superscript 1,2]. However, it remains
unknown whether these findings are relevant to natural ecosystems,
especially those for which species...
Human alterations to nutrient cycles[superscript 1,2] and herbivore communities³⁻⁷
are affecting global biodiversity dramatically². Ecological theory predicts
these changes should be strongly counteractive: nutrient addition
drives plant species loss through intensified competition for
light, whereas herbivores prevent competitive exclusion by increasing
ground-level light, particularly in productive systems[superscript 8,9]. Here we...