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The adaptational system as a dynamical feedback system

H R Gregorius1

  • 1Institut für Forstgenetik und Forstpflanzenzüchtung, Universität Göttingen, Germany.

Journal of Theoretical Biology
|December 17, 1997
PubMed
Summary

Biological systems adapt by conforming to environmental demands, utilizing modifying and adaptive roles. This framework details three subsystems for organismic persistence and response adaptation.

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Area of Science:

  • Systems biology
  • Evolutionary biology
  • Ecological physiology

Background:

  • Organismic persistence relies on biological systems adapting to environmental influences.
  • Life's manifestations are shaped by environmental interactions, necessitating conformity for survival.

Purpose of the Study:

  • To develop a comprehensive framework for biological adaptation systems.
  • To introduce precise analytical tools for concepts like adaptational lag and capacity.
  • To explore the evolutionary implications of phenotypic plasticity.

Main Methods:

  • Formulation of a generic three-subsystem model (modifying, comparator, state regulation).
  • Introduction of 'adaptational valuation' as a measure of response adaptedness.
  • Analysis of feedback timing to describe the dynamics of adaptation.

Main Results:

  • The model integrates discrete and continuous adaptation forms.
  • Precise analysis of adaptational lag and capacity is demonstrated.
  • Distinction between environmental roles reveals adaptational clues and evolutionary questions.

Conclusions:

  • The proposed system provides a unified conceptual basis for understanding adaptation dynamics.
  • Environmental roles (modifying vs. adaptive) are crucial for analyzing adaptation.
  • This framework aids in understanding phenotypic plasticity and evolutionary adaptation.

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