The scientific method can only disprove theories or increase the power of previous predictions that have yet to be disproved, but it can never absolutely prove anything to be absolutely true.Therefore, the best thing to do in science is to continually question and test previous hypothesis and theories to see if they continue to hold up under scrutiny.This is because large areas include a subset of species not found elsewhere. [These features are consistent with the hypothesis of] "isolated habitat 'islands'." Using this line of reasoning, one might reasonable hypothesize that trilobites appear in the fossil record before crabs and lobsters at least party because of the relative abundance of trilobites compared to crabs and lobsters.Therefore, the nested subset pattern of species distribution in space is thought to reflect the gradient in abundance among species (Gaston, 1996; Leitner and Rosenzweig, 1997; Maurer, 1999). This hypothesis is at least plausible given the author's conclusion that, "Species identities and their relative abundances are non-random properties of communities that persist over long periods of ecological time and across geographic space.Many of the layers also show a certain specialization.Some layers contain mostly fish fossils while others contain land-dwelling creatures such as dinosaurs.
It goes against human nature to challenge long held ideas of truth.
Differences in the ability of species to distribute themselves across space have distinct consequences for the structure of communities.