Passage: Johannes Eugenius Bülow Warming (3 November 1841 – 2 April 1924), known as Eugen Warming, was a Danish botanist and a main founding figure of the scientific discipline of ecology.  Warming wrote the first textbook (1895) on plant ecology, taught the first university course in ecology and gave the concept its meaning and content.

Question: What facet of science did Warming found?
ecology