Soil and Plant Selenium Relationships on Two Seleniferous Sites in Wyoming

摘要

Several naturally occurring seleniferous areas were known to occur in theNorthern Great Plains and two of these were selected for the study. The study of the known seleniferous areas were initiated because such areas could provide information on what were thought to be (or are) toxic levels of selenium in naturally occurring ecosystems. The results presented are limited in both the intensity of the studies on the respective sites and extent to which such data can be extrapolated to other sites. The basic analytical data does provide relatively recent characterization of soil and plant species selenium content, produced under modern analytical techniques incorporating rigorous quality assurance/quality control program, for natural ecosystems which exhibit potential or existing selenium toxicities.