A primary source reports authors' original research. Types of primary literature include research articles, technical reports, conference papers, and patents, among others.
Start on the Booth Library homepage, www.library.eiu.edu, and navigate to the appropriate journal article databases to find ecology articles.
Biological and Agricultural Index Plus is one database that contains journal articles for the fields of ecology and evolution.
BIOSIS Previews is another database that has ecology and evolution journal articles.
Scopus is a third option for locating scientific literature in ecology and evolution.