The role of spatial structure in multi‐deme models of evolutionary rescue

Tomasini, Matteo; Peischl, Stephan

doi:10.1111/jeb.14018

Cited by 3 publications

(2 citation statements)

References 84 publications

(167 reference statements)

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“…Essentially, this means that the more individuals are exposed to the challenging habitat, the faster the populations become resistant. This result confirms and extends previous findings from models of evolutionary rescue and source-sink dynamics where a larger number of individuals exposed to the challenging habitat results in a higher probability of local adaptation (Czuppon et al, 2021;Tomasini & Peischl, 2022).…”

Section: Discussionsupporting

confidence: 91%

The role of evolving niche choice in herbivore adaptation to host plants

Nabutanyi,

Edison,

Czuppon

et al. 2024

Preprint

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Individuals living in heterogeneous environments often choose microenvironments that provide benefits to their fitness. Theory predicts that such "niche choice" can promote rapid adaptation to novel environments and help maintain genetic diversity. An open question of large applied importance is how niche choice and niche choice evolution affect the evolution of insecticide resistance in phytophagous insects. We, therefore, developed an individual-based model based on phytophagous insects to examine the evolution of insecticide resistance and host plant choice via oviposition preferences. To find biologically realistic parameter ranges, we performed an empirical literature survey on insecticide resistance in major agricultural pests and also conducted a density-dependent survival experiment using potato beetles. We find that, in comparison to a scenario where individuals randomly oviposit eggs on toxic or non-toxic plants, the evolution of niche choice generally leads to slower evolution of resistance and facilitates the coexistence of different phenotypes. Our simulations also reveal that recombination rate and dominance effects can influence the evolution of both niche choice and resistance. Thus, this study provides new insights into the effects of niche choice on resistance evolution and highlights the need for more studies on the genetic basis of resistance and choice.

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Section: Discussionsupporting

confidence: 91%

The role of evolving niche choice in herbivore adaptation to host plants

Nabutanyi,

Edison,

Czuppon

et al. 2024

Preprint

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“…Gene flow allows genetic variation and the introduction of beneficial mutants necessary for adaptation. However, a too-strong gene flow risks preventing local beneficial mutants from becoming permanently established, hence the need for intermediate gene flow to optimize adaptation (Tomasini and Peischl, 2022). Further studies showed that directed gene flow based on habitat choice could favor evolutionary rescue (Czuppon et al, 2021).…”

Section: Gene Flow Mitigate Extinction Riskmentioning

confidence: 99%

How bottlenecks shape adaptive potential: from theory and microbiology to conservation biology

Gamblin,

Marrec,

Olazcuaga

2024

Preprint

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Wild populations frequently undergo demographic changes that can destabilize their persistence and, thus, the equilibrium of ecosystems. For instance, habitat loss due to human activities leads to a drastic population size reduction, a process called a bottleneck. By reducing genetic diversity, a bottleneck may prevent a population from adapting to subsequent environmental changes. In the context of climate change, it is crucial to accurately predict how populations evolve after a bottleneck and how it affects their persistence. Mathematical models have provided valuable insights into the impact of bottlenecks on adaptive potential of populations. However, their application to wild populations requires further improvement. Empirical testing of these theoretical predictions is mainly conducted using microbial populations. Thus, it remains unclear what the implications of the results are at the macroscopic scale, although this information is crucial for conservation biology. Here, we aim to determine the extent to which the knowledge acquired through evolutionary theory and experimental microbiology can be applied to wild populations. To achieve this, we address the following questions: (i) What do theory and microbiology experiments tell us about the influence of bottlenecks on the ability of populations to adapt to future environmental changes? (ii) Can these theoretical predictions be applied to wild populations? and (iii) What is missing to better predict the evolution of wild populations after a bottleneck? We analyze how the four main evolutionary processes (mutation, genetic drift, natural selection, and gene flow) influence the outcome of a bottlenecked population. By linking theory, microbial experiments, and empirical studies on natural populations, we identify research directions that could help improve the management of bottlenecked populations and plead for increased communication between these fields.

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Spatial structure facilitates evolutionary rescue by drug resistance

Fruet,

Müller,

Loverdo

et al. 2024

Preprint

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Bacterial populations often have complex spatial structures, which can impact their evolution. Here, we study how spatial structure affects the evolution of antibiotic resistance in a bacterial population. We consider a minimal model of spatially structured populations where all demes (i.e., subpopulations) are identical and connected to each other by identical migration rates. We show that spatial structure can facilitate the survival of a bacterial population to antibiotic treatment, starting from a sensitive inoculum. Specifically, the bacterial population can be rescued if antibiotic resistant mutants appear and are present when drug is added, and spatial structure can impact the fate of these mutants and the probability that they are present. Indeed, the probability of fixation of neutral or deleterious mutations providing drug resistance is increased in smaller populations. This promotes local fixation of resistant mutants in the structured population, which facilitates evolutionary rescue by drug resistance in the rare mutation regime. Once the population is rescued by resistance, migrations allow resistant mutants to spread in all demes. Our main result that spatial structure facilitates evolutionary rescue by antibiotic resistance extends to more complex spatial structures, and to the case where there are resistant mutants in the inoculum.

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The role of spatial structure in multi‐deme models of evolutionary rescue

Cited by 3 publications

References 84 publications

The role of evolving niche choice in herbivore adaptation to host plants

The role of evolving niche choice in herbivore adaptation to host plants

How bottlenecks shape adaptive potential: from theory and microbiology to conservation biology

Spatial structure facilitates evolutionary rescue by drug resistance

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