Odum adopted and developed further the term "ecosystem". Although sometimes said to have been coined by Raymond Lindeman in 1942, the term "ecosystem" first appeared in a 1935 publication by the British ecologist, Arthur Tansley, and had in 1930 been coined by Tansley's colleague, Roy Clapham. Before Odum, the ecology of specific organisms and environments had been studied on a more limited scale within individual sub-disciplines of biology. Many scientists doubted that it could be studied on a large scale, or as a discipline in itself.