From orchid physiology to landscapes
Curtis initially studied orchid seeds and reproductive physiology, receiving his Wisconsin doctorate in 1937. During the Second World War he worked in Haiti on a plant research programme intended to produce rubber.
Vegetation transformation and the loss of native species there sharpened his interest in land use and natural communities. After returning to Madison he increasingly focused on regional vegetation.
Testing community continuity
Influenced by Henry Gleason’s individualistic view of species distributions, Curtis and colleagues systematically sampled vegetation. They tested whether plants consistently formed sharply bounded groups that changed together.
The evidence supported separate, continuous species responses along environmental gradients. Community names could organize observations, while boundaries and composition remained matters for investigation.
A regional synthesis in 1959
The Vegetation of Wisconsin: An Ordination of Plant Communities (1959) assembled surveys from more than a thousand sites, describing species composition and environmental relationships across forests, prairies and transition areas.
The team preserved its field records for later comparisons. Quantitative surveys consequently supplied both evidence for contemporary theory and a baseline for studying long-term change.
References: [2]
Restoring communities
Continuing Aldo Leopold’s vision for the Wisconsin Arboretum, Curtis emphasized restoring representative natural communities. He investigated management factors such as fire in prairie restoration, making restoration an observable research process.
He also chaired Wisconsin’s State Board for Preservation of Scientific Areas from 1952 to 1955. Research, restoration and protection connected field evidence with continuing management and institutional support.