The influence of native populations’ genetic history on the reconstruction of invasion routes: the case of a highly invasive aquatic species

Brazier, Thomas; Cherif, Emira; Martin, Jean; Gilles, André; Blanchet, Simon; Zhao, Yahui; Combe, Marine; McCairns, R. J. Scott; Gozlan, Rodolphe E.

doi:10.1007/s10530-022-02787-6

Cited by 7 publications

(9 citation statements)

References 123 publications

(152 reference statements)

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“…Effective population size was higher in topmouth gudgeon than in three‐spined stickleback, but lower than in stone loach. Large effective population sizes have previously been observed in topmouth gudgeon in Western Europe (Brazier et al, 2022 ). These observations suggest high gene flow between populations of topmouth gudgeon with minor effects of dispersal distance and spatial barriers on the connectivity among populations.…”

Section: Discussionmentioning

confidence: 67%

“…It is generally hypothesized that invasive species are genetically less diverse due to a succession of genetic bottlenecks associated with founder effects (Allendorf & Lundquist, 2003 ; Hardouin et al, 2018 ). Yet, multiple studies report higher genetic diversity in the invasive range of topmouth gudgeon compared to its native range (Baltazar‐Soares et al, 2020 ; Brazier et al, 2022 ; Simon et al, 2011 , 2014 ). The most recent analysis of the global population genetics of topmouth gudgeon (Brazier et al, 2022 ) indicates that the invasive populations found in Europe descend from native admixed population, thus potentially explaining the elevated heterozygosity, which might also increase these populations' fitness by heterosis (Keller et al, 2014 ; Roman & Darling, 2007 ; Rosenthal et al, 2008 ).…”

Section: Discussionmentioning

confidence: 99%

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Contrasting population genetic responses to migration barriers in two native and an invasive freshwater fish

Deflem

Calboli

Christiansen

et al. 2022

Evolutionary Applications

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Habitat fragmentation impacts the distribution of genetic diversity and population genetic structure. Therefore, protecting the evolutionary potential of species, especially in the context of the current rate of human-induced environmental change, is an important goal. In riverine ecosystems, migration barriers affect the genetic structure of native species, while also influencing the spread of invasive species. In this study, we compare genetic patterns of two native and one highly invasive riverine fish species in a Belgian river basin, namely the native three-spined stickleback (Gasterosteus aculeatus) and stone loach (Barbatula barbatula), and the non-native and invasive topmouth gudgeon (Pseudorasbora parva). We aimed to characterize both natural and anthropogenic determinants of genetic diversity and population genetic connectivity. Genetic diversity was highest in topmouth gudgeon, followed by stone loach and three-spined stickleback. The correlation between downstream distance and genetic diversity, a pattern often observed in riverine systems, was only marginally significant in stone loach and three-spined stickleback, while genetic diversity strongly declined with increasing number of barriers in topmouth gudgeon. An Isolation-By-Distance pattern characterizes the population genetic structure of each species. Population differentiation was only associated with migration barriers in the invasive topmouth gudgeon, while genetic composition of all species seemed at least partially determined by the presence of migration barriers. Among the six barrier types considered (watermills, sluices, tunnels, weirs, riverbed obstructions, and others), the presence of watermills was the strongest driver of genetic structure and composition. Our results indicate that conservation and restoration actions, focusing on conserving genetic patterns, cannot be generalized across species. Moreover, measures might target either on restoring connectivity, while risking a rapid spread of the invasive topmouth gudgeon, or not restoring connectivity, while risking native species extinction in upstream populations.

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Section: Discussionmentioning

confidence: 67%

Section: Discussionmentioning

confidence: 99%

Contrasting population genetic responses to migration barriers in two native and an invasive freshwater fish

Deflem

Calboli

Christiansen

et al. 2022

Evolutionary Applications

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“…Published data indicate ancient host-parasite co-evolution with multiple introduction events occurring across Europe from admixed host population sources of P. parva [20,21]. Furthermore, S. destruens is considered as a generalist parasite with a wide host range [12,22] and high tolerance to temperature variations (from the mountainous Tcheremoch River in Ukraine to the desert wadi of Felrhir in Algeria) and several reports indicate the global spread of its healthy carrier host P. parva.…”

Section: Introductionmentioning

confidence: 99%

Emergence of the Fungal Rosette Agent in the World: Current Risk to Fish Biodiversity and Aquaculture

Gozlan¹,

Combe²

2023

Preprint

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The emergence of pathogenic fungi is a major and rapidly growing problem (7% increase) that affects human and animal health, ecosystems, food security and the economy worldwide. The Dermocystida group in particular has emerged relatively recently and includes species that affect both humans and animals. Within this group, one species in particular, Sphareothecum destruens, also known as the Rosette agent, represents a major risk to global aquatic biodiversity and aquaculture and has caused severe declines in wild fish populations in Europe and large losses in salmon farms in the USA. It is a species that has been associated with a healthy carrier for millions of years but the host has managed in recent decades to invade parts of Southeast Asia, Central Asia, Europe and North Africa. In order to better understand the emergence of this new disease, we have for the first time synthesised current knowledge on the distribution, detection, prevalence of S. destruens as well as the associated mortality curves, and the potential economic impact in countries where the healthy carrier has been introduced. Finally, we propose solutions and perspectives to manage and mitigate the emergence of this fungus in countries where it has been introduced.

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“…These geographic pathways followed by organisms from their source to their introduction site can provide critical information to limit propagule pressure and prevent successful establishment [ 8 ]. Important information regarding movement pathways and invasion routes may be gained by comparing the genetic makeup of an invader with the spatial genetic structure of the species in other distribution areas [ 9 – 12 ].…”

Section: Introductionmentioning

confidence: 99%

Microsatellite profiling of hosts from parasite-extracted DNA illustrated with raccoons (Procyon lotor) and their Baylisascaris procyonis roundworms

2023

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Background Important information on movement pathways and introduction routes of invasive parasites can be obtained by comparing the genetic makeup of an invader with its spatial genetic structure in other distribution areas. Sometimes, the population genetic structure of the host might be more informative than that of the parasite itself, and it is important to collect tissue samples of both host and parasite. However, host tissue samples are frequently not available for analysis. We aimed to test whether it is possible to generate reliable microsatellite profiles of host individuals by amplifying DNA extracted from a nematode parasite, using the raccoon (Procyon lotor) and the raccoon roundworm (Baylisascaris procyonis) as a test case. Methods Between 2020 and 2021, we collected tissue as well as a single roundworm each from 12 raccoons from central Germany. Both the raccoon and the roundworm DNA extracts were genotyped using 17 raccoon-specific microsatellite loci. For each roundworm DNA extract, we performed at least eight amplification reactions per microsatellite locus. Results We extracted amplifiable raccoon DNA from all 12 roundworms. We obtained at least two amplification products for 186 of the 204 possible genotypes. Altogether 1077 of the 1106 genotypes (97.4%) matched the host-DNA derived reference genotypes and thus did not contain genotyping errors. Nine of the 12 roundworm-derived genetic profiles matched the reference profiles from the raccoon hosts, with one additional genetic profile containing genotyping errors at a single locus. The remaining two genetic profiles were deemed unsuitable for downstream analysis because of genotyping errors and/or a high proportion of missing data. Conclusions We showed that reliable microsatellite-based genetic profiles of host individuals can be obtained by amplifying DNA extracted from a parasitic nematode. Specifically, the approach can be applied to reconstruct invasion pathways of roundworms when samples of the raccoon hosts are lacking. Further research should assess whether this method can be replicated in smaller species of parasitic nematodes and other phyla of parasites more generally. Graphical Abstract

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The influence of native populations’ genetic history on the reconstruction of invasion routes: the case of a highly invasive aquatic species

Abstract: Brazier Thomas and Cherif Emira should be considered joint first authors.

Cited by 7 publications

References 123 publications

Contrasting population genetic responses to migration barriers in two native and an invasive freshwater fish

Contrasting population genetic responses to migration barriers in two native and an invasive freshwater fish

Emergence of the Fungal Rosette Agent in the World: Current Risk to Fish Biodiversity and Aquaculture

Microsatellite profiling of hosts from parasite-extracted DNA illustrated with raccoons (Procyon lotor) and their Baylisascaris procyonis roundworms

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