Good ol' punctuated equilibrium.
Changes gradually because each species responds differently to changes in environmental factors.
Good ol' punctuated equilibrium.
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.
In the 1930s, Dobzhansky and Mayr explained that species originate through allopatric speciation.
The term is biodiversity. High biodiversity means a large number of different species in an ecosystem. An ecosystem with many different species is less likely to be disrupted by environmental changes.
Good ol' punctuated equilibrium.
Good ol' punctuated equilibrium.
Good ol' punctuated equilibrium.
Good ol' punctuated equilibrium.
Good ol' punctuated equilibrium.
because they are
Species stay the same for a long time and then change quickly due to environmental changes.
Changes gradually because each species responds differently to changes in environmental factors.
Good ol' punctuated equilibrium.
extinct
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.
extinct