Johann G. Zaller is Associate Professor at the University of Natural Resources and Life Sciences in Vienna, Austria. He studied biology, botany and ecology at the Universities of Salzburg and Innsbruck in Austria. During his postgraduate research career he worked and studied in the United States, Argentina, Switzerland and Germany.

His research group at the University of Vienna investigates how environmental changes influence organisms and ecosystem functions. The group especially is interested in the effects of agricultural management measures (e.g. tillage, crop rotation, mowing, fertilising, pesticide applications) and the impacts of global changes (e.g. elevated atmospheric CO₂, ultraviolet-B radiation, rainfall and temperature variations, invasive species).