Carsten F. Dormann is professor of biometry and environmental system analysis at the University of Freiburg, Germany. He is the author of the introductory textbook Environmental Data Analysis and coauthor of an open marine ecology textbook, Marine Ecology Notes. Aaron M. Ellison served for twenty years as the senior research fellow in ecology at Harvard University. He is the author of A Field Guide to the Ants of New England and Vanishing Point and coauthor of A Primer of Ecological Statistics, Scaling in Ecology with a Model System, and other books.