Punctuated Equilibrium, I believe is the answer.
Punctuated Equilibrium, I believe is the answer.
56 million years ago - the PETM - Warming led to massive mammalian Migrations.
The model for slow changes of evolution over time is known as gradualism. This model proposes that evolution occurs gradually through small, incremental changes in species over long periods of time, resulting in the development of new species. This contrasts with the theory of punctuated equilibrium, which suggests that evolution can also occur through rapid bursts of change followed by long periods of stability.
The punctuated equilibrium model of evolution suggests that evolution occurs in rapid bursts of change separated by long periods of stability. This model emphasizes the idea that species evolve quickly in response to environmental changes, leading to abrupt shifts in their characteristics over relatively short periods of time.
The term you're looking for is 'punctuated equilibrium', a model formulated in the 1970s by Stephen Gould and Niles Eldredge.This model describes how species can change very little over longer periods of time, followed by a shorter period of rapid change.To say that the only factors affecting those developments are environmental changes is oversimplifying the model a bit, I think. The period of rapid change could be triggered by anything from changes in the environment to population growth to changes in the structure of the population, and so on.
The gradualism model of evolution proposes that species evolve slowly and steadily over long periods of time, with small changes accumulating to result in significant transformations. This contrasts with the punctuated equilibrium model, which suggests that evolution occurs in short bursts of rapid change followed by long periods of stability.
Rapid and slow earth changes are alike in that they both involve processes that shape and transform the Earth's surface over time. While the speed differs, both types of changes contribute to the dynamic nature of the Earth's environment and can have long-lasting effects on landscapes and ecosystems.
Rapid tempo changes or frequent changes in time signature.
Birth rates, death rates, and population growth over time.
The gradualism model of evolution suggests that evolution occurs slowly and continuously over long periods of time through accumulation of small, incremental changes. In contrast, the punctuated equilibrium model proposes that evolution occurs in rapid bursts of change followed by long periods of stasis, with new species appearing suddenly in the fossil record.
Natural disasters such as earthquakes, volcanic eruptions, and landslides can cause rapid changes to Earth's surface. These events can alter landscapes quickly and dramatically, shaping the land over short periods of time.
Changes in genetic equilibrium can lead to speciation over longer periods of time, typically spanning thousands to millions of years. Rapid bursts of speciation, known as adaptive radiations, can occur in certain circumstances such as when a population undergoes rapid environmental changes, leading to the rise of multiple new species in a relatively short time span.