Eugenius Warming was a Danish professor primarily interested in plant geography. His intial work was published as Plantesamfund in 1895 and was later revised and translated into English in 1909 as The Oecology of Plants: an Introduction to the Study of Plant Communities. Warming's work focused on the habitats of plant communities and the factors that contributed to their growth, included aspects like light, heat, soil, humidity and interactions with adjacent animals. His work primarily addresses the emerging idea of a communal existence of organisms as an "ecology" and the adjustment of organisms to a habitat, which he termed "epharmosis."
Bibliography:
Worster, Donald. 1994. Nature's economy: a history of ecological ideas. Cambridge University: Cambridge. [198-99]