Robert Harding Whittaker (December 27, 1920 – October 20, 1980) was a distinguished American plant ecologist, active in the 1950s to the 1970s.
He was the first to propose the five kingdom taxonomic classification of the world's biota into the Animalia, Plantae, Fungi, Protista, and Monera in 1969.
He also proposed the Whittaker Biome Classification, which categorized biome-types upon two abiotic factors : temperature and precipitation.
Whittaker was elected to the National Academy of Science in 1974, received the Ecological Society of America's Eminent Ecologist Award in 1981, and was otherwise widely recognized and honored.
He collaborated with many other ecologists including George Woodwell (Dartmouth), W.
A.
Niering, F.
H.
Bormann (Yale) and G.
E.
Likens (Cornell), and was particularly active in cultivating international collaborations.