Aaron M. Ellison is an American ecologist, photographer, sculptor, and writer. He retired in July 2021 after 20 years as the senior research fellow in ecology at Harvard University and as a Senior Ecologist at the Harvard Forest. He also served as deputy director of the Harvard Forest from 2018 to 2021. Until 2018, he also was an adjunct research professor at the University of Massachusetts in the Departments of Biology and Environmental Conservation. Ellison has both authored and co-authored numerous scientific papers, books, book reviews and software reviews. For more than 30 years, Ellison has studied food-web dynamics and community ecology of wetlands and forests; the evolutionary ecology of carnivorous plants; the responses of plants and ants to global climate change; application of Bayesian statistical inference to ecological research and environmental decision-making; and the critical reaction of Ecology to Modernism. In 2012 he was elected a fellow of the Ecological Society of America. He was the editor-in-chief of Ecological Monographs from 2008 to 2015, was a senior editor of Methods in Ecology and Evolution from 2018-2021, and since 2021 has been the executive editor of Methods in Ecology and Evolution.