Dr. Mike Palmer, an Associate Professor of Botany at Oklahoma State University, put together this site as an instructional resource for a graduate-level course. Ordination, which means, literally, "the ordering of a set of data points with respect to one or more axes," is often used to generate hypotheses about the relationship between species composition and the underlying environmental gradients...

This excellent article by Douglas H. Johnson was published this summer in the Journal of Wildlife Management, 63(3):763-772 and is made available now in electronic version by the Northern Prairie Wildlife Research Center. In the article, Johnson argues that "statistical hypothesis tests add very little value to the products of research." Through a series of simple examples and clear text, Johnson...