There are two objectives of this experiment. The first is to test the effectiveness of various soil treatments on cheatgrass (Bromus tectorum) canopy cover. The second is to compare the two treatment types side by side to evaluate their relative effectiveness in treating cheatgrass. The treatments we selected are easily...
Identification of critical habitat for all life stages of commercially exploited fish populations is critical for effective management. Despite a clear need for basic biological information on juvenile rockfish life history, there have been very few efforts to describe distribution and habitat of this life stage, particularly along the Oregon...
Declared out of print March 2010. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
The OSU Extension Soil Sensitivity Database lists
nonirrigated and irrigated soil sensitivity ratings for every
map unit of every soil survey in Oregon. These ratings
were developed for the Oregon Water Quality Decision
Aid, a tool for evaluating groundwater vulnerability to
pesticide contamination.
Public agencies need information on the value of
recreational activities to assist in managing fish and
wildlife species. Over the past two decades economists have
developed and applied techniques to measure the value of such
non-marketed commodities.
The contingent valuation method (CVM) is one technique
used by economists to measure...
Pan et al. claim that our results actually support a strong linear positive relationship between productivity and richness, whereas Fridley et al. contend that the data support a strong humped relationship. These responses illustrate how preoccupation with bivariate patterns distracts from a deeper understanding of the multivariate mechanisms that control...
Accurately simulating gross primary productivity (GPP) in terrestrial ecosystem models is critical because errors in simulated GPP propagate through the model to introduce additional errors in simulated biomass and other fluxes. We evaluated simulated, daily average GPP from 26 models against estimated GPP at 39 eddy covariance flux tower sites...
Disturbance regimes differ in type, magnitude, and frequency, but few field experiments have considered compounded effects of disturbance. In this study, we characterized gap recovery after complete removal of eelgrass (Zostera marina) in Willapa Bay, Washington, USA. In separate experiments, we imposed two disturbance types – shoot damage and shoot...
Seagrasses and bivalves co-occur worldwide, and each plays a role in the structure, function, and services of coastal ecosystems. While seagrasses are declining, bivalve aquaculture is expanding, and impacts from culture practices, as opposed to the cultured organisms themselves, need to be distinguished. In 2 experiments, we tested the effects...