Who proposed the y-shaped energy flow model?
Y-shaped energy flow model was pioneered by H.T. Odum in 1956. The significant part in Y-shaped model is that the two food chains are not isolated from each other.
E.P. Odum in 1983 gave a generalized model by combining both single-channel model and Y-shaped models which are both applicable to terrestrial and aquatic ecosystem and this combined model is known as Universal energy flow model.