The wasp-waist model is typically observed in:
“Marine ecosystems” for the wasp-waist model is typically observed in. This relationship follows from the ecological mechanism represented by the terms in the item, not merely from an association between their names. Ecosystem processes are constrained by energy conservation and by the cycling of matter. Energy enters mainly through primary production, is lost as metabolic heat at every transfer, and therefore cannot be recycled in the way that carbon, nitrogen, phosphorus, or water can. The remaining alternatives—“Desert ecosystems”, “Grassland ecosystems”, “Mountain ecosystems”—refer to diff
Ref: Fundamentals of Ecology, Odum & Barrett, 5th Ed., Ch. 4