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THE model of punctuated equilibrium has given new impetus to evolutionary think ing, raising significant questions concern ing both the nature of the fossil record and the mechanism of the...
30 Αυγ 2016 · Reviews both the assertions of the punctuated equilibrium model and proposed mechanisms for gradualism, rapid speciation, and stasis as fossil patterns. Shows that a wide variety of species-level patterns are found in empirical fossil studies.
28 Οκτ 2024 · The theory of gradualism in evolution posits that species evolve through a series of small, incremental changes over extended periods. Charles Darwin popularized this concept, observing that the diversity of life forms could be explained by the accumulation of minute variations.
4 Οκτ 2018 · With the model of punctuated equilibria, an unbiased distribution of evolutionary tempos can be established by treating stasis as data and by recording the pattern of change for all species...
The attractiveness of punctuationalism is first of all due to its far-reaching implications for the study of macroevolution, since dismissal of the old gradualistic concept forces us to invoke some new biologic principles and/or mechanisms to account for macroevolutionary change.
Since Eldredge and Gould (1972) first wrote about “punctuated equilibrium” as a pattern for the history of life, three factions have appeared among evolutionary theorists. One faction favors the picture of punctuated equilibrium (Eldredge and Gould, 1972;...
Punctuated equilibrium, developed by Niles Eldredge and Stephen Jay Gould (1972), offers a contrasting view that organic evolution is not steady and regular but episodic and jerky, with long periods of small changes interspersed with rapid bursts of large-scale transformation of species.
