Intrinsic nonlinear dynamics drive single-species systems - Kölner UniversitätsPublikationsServer

Werner, Johannes ORCID: 0000-0002-9282-6066, Pietsch, Tobias ORCID: 0000-0002-6701-9238, Hilker, Frank M. and Arndt, Hartmut (2022). Intrinsic nonlinear dynamics drive single-species systems. Proc. Natl. Acad. Sci. U. S. A., 119 (44). WASHINGTON: NATL ACAD SCIENCES. ISSN 1091-6490

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DOI:10.1073/pnas.2209601119

Abstract

The importance of oscillations and deterministic chaos in natural biological systems has been discussed for several decades and was originally based on discrete-time population growth models (May 1974). Recently, all types of nonlinear dynamics were shown for experimental communities where several species interact. Yet, there are no data exhibiting the whole range of nonlinear dynamics for single-species systems without trophic interactions. Up until now, ecological experiments and models ignored the intracellular dimension, which includes multiple nonlinear processes even within one cell type. Here, we show that dynamics of single-species systems of protists in continuous experimental chemostat systems and corresponding continuous-time models reveal typical characteristics of nonlinear dynamics and even deterministic chaos, a very rare discovery. An automatic cell registration enabled a continuous and undisturbed analysis of dynamic behavior with a high temporal resolution. Our simple and general model considering the cell cycle exhibits a remarkable spectrum of dynamic behavior. Chaos-like dynamics were shown in continuous single-species populations in experimental and modeling data on the level of a single type of cells without any external forcing. This study demonstrates how complex processes occurring in single cells influence dynamics on the population level. Nonlinearity should be considered as an important phenomenon in cell biology and single-species dynamics and also, for the maintenance of high biodiversity in nature, a prerequisite for nature conservation.

Item Type:

Journal Article

Creators:

Creators	Email	ORCID	ORCID Put Code
Werner, Johannes	UNSPECIFIED	orcid.org/0000-0002-9282-6066	UNSPECIFIED
Pietsch, Tobias	UNSPECIFIED	orcid.org/0000-0002-6701-9238	UNSPECIFIED
Hilker, Frank M.	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Arndt, Hartmut	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED