Vandermeer and MacArthur derive a corrected version of predicted abundance versus rank curves for species that divide specialized niche space with arbitrary overlap. They forecast more even abundances than tend to be located in nature.A traditional demographic argument is generalized in graphical sort to confirm that variable environments pick for
three that Hutchinson recorded for temperate birds. Klopfer and MacArthur suggest that this is evidence that tropical birds’ niches overlap a lot more than those of temperate birds.Producing a idea that the volume of species on an island should really arrive at an equilibrium at which immigrations of recent species just equilibrium extinctions of
Stuckey also mischaracterized me as currently being “over the progressive conclusion” with no featuring any proof to guidance her claim. And she or he grossly mischaracterized my reporting on MacArthur’s mishandling from the David Grey scenario.In his shorter existence (b. 1930–d. 1972), Robert MacArthur was a hugely influential architect
In truth, the only real themes of later on get the job done which have been lacking in MacArthur’s warbler paper are genetic evolution, ecosystem energetics, and huge-scale geographic styles. As well as staying cited for its Most important benefits, the paper is widely cited by later ecologists being a primary affect in attracting them into their
MacArthur was inventive in gathering and examining subject knowledge. Warbler Paper is always worth re-reading using this type of in mind. His ways of measuring vegetation density are quick and shockingly trusted; These are described in MacArthur and MacArthur 1961; MacArthur, et al. 1962; and MacArthur and Horn 1969. All of them require projection