There have been many studies that describe the protective degradation or metabolism of potentially harmful plant toxins, such as, mimosine from Leucaena leuconcephala, pyrrolizidine alkaloids from tansy ragwort (Senecio jacobaea), oxalate and some mycotoxins by rumen microbes. There are many cases of plant-related toxicoses suffered by ruminant animals where there...
Cyclic nitramines are a class of compounds that include most of the commonly used explosives today. These are among the most common toxicants released into the environment as a result of human activity, generated on military ranges, battlefields, and production sites. Of these, hexahydro-1,3,5-trinitro-1,3,5- triazine (RDX) is of particular interest,...
The cycling of root-deposited photo synthate (rhizodeposition) through the
soil microbial biomass is widely recognized as a critical component of ecosystem
functioning. Little is currently known about the flow of photosynthate through the
microbial biomass however. My research goal was to examine if and how the flow
of root-deposited photo...
Remote national parks of the western U.S. and Alaska are not immune to contaminants of emerging
concern. Semivolatile organic compounds (SOCs) such as pesticides and PCBs can selectively deposit from
the atmosphere at higher rates in cold, high-elevation and high-latitude sites, potentially increasing risk to
these ecosystems. In the environment,...
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cold, mountainous, and circumpolar
regions (Wania and MacKay, 1993; Simonich and
Hites, 1995; Wania et
Cyclic nitramines released into all environmental compartments through anthropogenic activities are toxic and possibly carcinogenic and mutagenic. Soils on military ranges, located throughout the world in various climatic regions and close to human activities, are especially susceptible to cyclic nitramine contamination. The properties of soils on military ranges will directly...
In 1955 one oceanography report was issued by Oregon State University. The School of Oceanography now issues between 35 and 50 reports per year. This compilation lists in chronological order all oceanographic reports published through 1973. It also lists theses for which degrees were awarded between 1962 and 1973. Both...
The effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) exposure on hepatic
pyruvate carboxylase (PC) gene expression were investigated in C57BL/6J Ah[superscipt b/b male
mice. A dose-dependent reduction of PC levels and activity occurred in animals given a
single intraperitoneal dose of TCDD in a corn oil carrier. The dose ranged from 1 to...
Pacific harbor seals (Phoca vitulina richardii) are one of Oregon’s most common coastal predators, numbering between 10,000 and 12,000 individuals (Brown et al. 2005b). They consume more than 149 species or types of marine prey within the Pacific Northwest, which include a large variety of commercially important fisheries species. Despite...
Biological invasions create complex ecological
and societal issues worldwide. Most of the
knowledge about invasions comes only from successful
invaders, but less is known about which processes
determine the differential success of invasions. In this
review, we develop a framework to identify the main
dimensions driving the success and failure...