Positive feedback in macroevolution

Positive feedback plays an important role in macroevolution.

It was also suggested that “in the development of biota, there is also a second-order nonlinear positive feedback between the diversity and structure of the communities (more genera - higher alpha diversity (average number of genera in one community) - the communities become more complex, stable and“ buffered ” - the “taxonomic capacity” of the environment and the average duration of the existence of genera grows; the extinction rate decreases — the growth of diversity accelerates) ”( Markov , Korotaev 2007: 2; 2008: 3), which explains the hyperbolic biodiversity growth trend (ibid.).

In general, in macroevolution, positive feedback leads to a hyperbolic acceleration of the pace of development, which creates the effect of a uniform distribution of events on a logarithmic time scale .

An example of positive feedback in social systems is the second-order positive nonlinear feedback between demographic growth and technological development, which explains what was observed until the 70s. last century, a hyperbolic increase in the population of the Earth . This positive feedback can be schematically described as follows: technological growth - growth in the ceiling of the earth's bearing capacity (expansion of the ecological niche) - demographic growth - more people - more potential inventors - accelerated technological growth - accelerated growth in the earth's bearing capacity - even faster population growth - accelerated growth in the number of potential inventors - even faster technological growth - further acceleration of the growth rate of the carrying capacity of the earth and . N. ( Korotaev AV , 2006).

• Korotaev A.V. Periodization of the history of the World-System and mathematical macro-models of socio-historical processes // History and Mathematics: Problems of periodization of historical macro-processes. M .: KomKniga, 2006. S. 129-132
• A.V. Markov, A.V. Korotaev. The dynamics of diversity of Phanerozoic marine animals corresponds to the model of hyperbolic growth // Journal of General Biology. 2007. No. 1. S. 1-12.
• A.V. Markov, A.V. Korotaev. Hyperbolic growth of diversity of marine and continental biota of the Phanerozoic and evolution of communities // Journal of General Biology. 2008. No. 3. P. 175—194.

• Macroevolution in wildlife and society
• Hyperbolic growth in wildlife and society

• Negative feedback
• Peaking mode