Chaos may lurk under a cloak of neutrality

Denk, Jonas; Martis, Stephen; Hallatschek, Oskar

doi:10.1073/pnas.2010120117

Proc. Natl. Acad. Sci. U.S.A.

2020

DOI: 10.1073/pnas.2010120117

|View full text |Cite

Chaos may lurk under a cloak of neutrality

Jonas Denk

Stephen Martis

Oskar Hallatschek

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2023

2024

Publication Types

Select...

Article2

Relationship

Self Cite1

Independent1

Authors

Journals

Cited by 2 publications

(1 citation statement)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A metacommunity structure (a network of patches connected through dispersal) offers one plausible solution. Under conditions where patches’ abundance dynamics do not synchronize, local extinction can be compensated by migration from another patch, and the fluctuations persist on time scales much longer than the local dynamics ( 24 – 26 , 30 ).…”

mentioning

confidence: 99%

Chaotic turnover of rare and abundant species in a strongly interacting model community

Mallmin,

Traulsen,

De Monte

2024

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

The composition of ecological communities varies not only between different locations but also in time. Understanding the fundamental processes that drive species toward rarity or abundance is crucial to assessing ecosystem resilience and adaptation to changing environmental conditions. In plankton communities in particular, large temporal fluctuations in species abundances have been associated with chaotic dynamics. On the other hand, microbial diversity is overwhelmingly sustained by a “rare biosphere” of species with very low abundances. We consider here the possibility that interactions within a species-rich community can relate both phenomena. We use a Lotka–Volterra model with weak immigration and strong, disordered, and mostly competitive interactions between hundreds of species to bridge single-species temporal fluctuations and abundance distribution patterns. We highlight a generic chaotic regime where a few species at a time achieve dominance but are continuously overturned by the invasion of formerly rare species. We derive a focal-species model that captures the intermittent boom-and-bust dynamics that every species undergoes. Although species cannot be treated as effectively uncorrelated in their abundances, the community’s effect on a focal species can nonetheless be described by a time-correlated noise characterized by a few effective parameters that can be estimated from time series. The model predicts a nonunitary exponent of the power-law abundance decay, which varies weakly with ecological parameters, consistent with observation in marine protist communities. The chaotic turnover regime is thus poised to capture relevant ecological features of species-rich microbial communities.

show abstract

mentioning

confidence: 99%

Chaotic turnover of rare and abundant species in a strongly interacting model community

Mallmin,

Traulsen,

De Monte

2024

Proc. Natl. Acad. Sci. U.S.A.

View full text Add to dashboard Cite

show abstract

Proliferating active matter

et al. 2023

Self Cite

View full text Add to dashboard Cite

The fascinating patterns of collective motion created by autonomously driven particles have fuelled active-matter research for over two decades. So far, theoretical active-matter research has often focused on systems with a fixed number of particles. This constraint imposes strict limitations on what behaviours can and cannot emerge. However, a hallmark of life is the breaking of local cell number conservation by replication and death. Birth and death processes must be taken into account, for example, to predict the growth and evolution of a microbial biofilm, the expansion of a tumour, or the development from a fertilized egg into an embryo and beyond. In this Perspective, we argue that unique features emerge in these systems because proliferation represents a distinct form of activity: not only do the proliferating entities consume and dissipate energy, they also inject biomass and degrees of freedom capable of further self-proliferation, leading to myriad dynamic scenarios. Despite this complexity, a growing number of studies document common collective phenomena in various proliferating soft-matter systems. This generality leads us to propose proliferation as another direction of active-matter physics, worthy of a dedicated search for new dynamical universality classes. Conceptual challenges abound, from identifying control parameters and understanding large fluctuations and nonlinear feedback mechanisms to exploring the dynamics and limits of information flow in self-replicating systems. We believe that, by extending the rich conceptual framework developed for conventional active matter to proliferating active matter, researchers can have a profound impact on quantitative biology and reveal fascinating emergent physics along the way.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Chaos may lurk under a cloak of neutrality

Cited by 2 publications

References 20 publications

Chaotic turnover of rare and abundant species in a strongly interacting model community

Chaotic turnover of rare and abundant species in a strongly interacting model community

Proliferating active matter

Contact Info

Product

Resources

About