Dataset Information

Modelling the invasion history of Sinanodonta woodiana in Europe: Tracking the routes of a sedentary aquatic invader with mobile parasitic larvae.

ABSTRACT: Understanding the invasive potential of species outside their native range is one of the most pressing questions in applied evolutionary and ecological research. Admixture of genotypes of invasive species from multiple sources has been implicated in successful invasions, by generating novel genetic combinations that facilitate rapid adaptation to new environments. Alternatively, adaptive evolution on standing genetic variation, exposed by phenotypic plasticity and selected by genetic accommodation, can facilitate invasion success. We investigated the population genetic structure of an Asian freshwater mussel with a parasitic dispersal stage, Sinanodonta woodiana, which has been present in Europe since 1979 but which has expanded rapidly in the last decade. Data from a mitochondrial marker and nuclear microsatellites have suggested that all European populations of S. woodiana originate from the River Yangtze basin in China. Only a single haplotype was detected in Europe, in contrast to substantial mitochondrial diversity in native Asian populations. Analysis of microsatellite markers indicated intensive gene flow and confirmed a lower genetic diversity of European populations compared to those from the Yangtze basin, though that difference was not large. Using an Approximate Bayesian Modelling approach, we identified two areas as the probable source of the spread of S. woodiana in Europe, which matched historical records for its establishment. Their populations originated from a single colonization event. Our data do not support alternative explanations for the rapid recent spread of S. woodiana; recent arrival of a novel (cold-tolerant) genotype or continuous propagule pressure. Instead, in situ adaptation, facilitated by repeated admixture, appears to drive the ongoing expansion of S. woodiana. We discuss management consequences of our results.

SUBMITTER: Konecny A

PROVIDER: S-EPMC6231479 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature

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Modelling the invasion history of <i>Sinanodonta woodiana</i> in Europe: Tracking the routes of a sedentary aquatic invader with mobile parasitic larvae.

Konečný Adam A Popa Oana P OP Bartáková Veronika V Douda Karel K Bryja Josef J Smith Carl C Popa Luis O LO Reichard Martin M

Evolutionary applications 20181020 10

Understanding the invasive potential of species outside their native range is one of the most pressing questions in applied evolutionary and ecological research. Admixture of genotypes of invasive species from multiple sources has been implicated in successful invasions, by generating novel genetic combinations that facilitate rapid adaptation to new environments. Alternatively, adaptive evolution on standing genetic variation, exposed by phenotypic plasticity and selected by genetic accommodati ...[more]

PMID: 30459842

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Project description:The current study aimed to investigate the association of microbial characteristics in the stomach of Sinanodonta woodiana (S. woodiana) and its cultured soil. S. woodiana stomach and its cultured soil were collected in winter 2019. The V3 + V4 regions of the 16S rRNA gene were sequenced to detect microbial diversity. The differences in the dominant species between S. woodiana and soil were also discussed. The results showed that the diversity and richness indices in S. woodiana were significantly higher than those in cultured soil (P < 0.01). At the phylum level, the dominant bacterial community compositions in the two groups were similar and included Proteobacteria, Firmicutes, Bacteroidetes, Cyanobacteria, Fusobacteria, and Acidobacteria. However, the abundance of these phyla was significantly different between the two groups (P < 0.05 or P < 0.01), and Proteobacteria was the most abundant phylum. At the genus level, a total of 1001 genera were identified in the two groups, of which 890 genera were detected in the cultured soil and 549 were detected in the S. woodiana stomach; 452 were unique to the cultured soil, and 111 were unique to the S. woodiana stomach. This result indicated great differences in the bacterial genera between the two groups. Moreover, 17 out of the 20 dominant bacterial genera exhibited statistically significant differences between the two groups (P < 0.05 or P < 0.01). Cupriavidus was the absolute dominant genus in the stomach of S. woodiana, followed by Sphingomonas and Burkholderia. The microorganisms in the stomach of S. woodiana formed a certain inherent bacterial system and were affected by the environment, which is beneficial to nutrition and health. In conclusion, the bacterial compositions were mostly the same between the stomach of S. woodiana and cultured soil, but the relative abundances of the bacterial communities were different. This study will greatly enhance the understanding of the microbial characteristics between the stomach of S. woodiana and the cultured environment, and provide guidance for healthy aquaculture in freshwater.

Project description:Despite the increasing number of species invasions, the factors driving invasiveness are still under debate. This is particularly the case for "invisible" invasions by aquatic microbial species. Since in many cases only a few individuals or propagules enter a new habitat, their genetic variation is low and might limit their invasion success, known as the genetic bottleneck. Thus, a key question is, how genetic identity and diversity of invading species influences their invasion success and, subsequently, affect the resident community. We conducted invader-addition experiments using genetically different strains of the globally invasive, aquatic cyanobacterium Raphidiopsis raciborskii (formerly: Cylindrospermopsis raciborskii) to determine the role of invader identity and genetic diversity (strain richness) at four levels of herbivory. We tested the invasion success of solitary single strain invasions against the invader genetic diversity, which was experimentally increased up to ten strains (multi-strain populations). By using amplicon sequencing we determined the strain-specific invasion success in the multi-strain treatments and compared those with the success of these strains in the single-strain treatments. Furthermore, we tested for the invasion success under different herbivore pressures. We showed that high grazing pressure by a generalist herbivore prevented invasion, whereas a specialist herbivore enabled coexistence of consumer and invader. We found a weak effect of diversity on invasion success only under highly competitive conditions. When invasions were successful, the magnitude of this success was strain-specific and consistent among invasions performed with single-strain or multi-strain populations. A strain-specific effect was also observed on the resident phytoplankton community composition, highlighting the strong role of invader genetic identity. Our results point to a strong effect of the genetic identity on the invasion success under low predation pressure. The genetic diversity of the invader population, however, had little effect on invasion success in our study, in contrast to most previous findings. Instead, it is the interaction between the consumer abundance and type together with the strain identity of the invader that defined invasion success. This study underlines the importance of strain choice in invasion research and in ecological studies in general.

Dataset Information

Modelling the invasion history of Sinanodonta woodiana in Europe: Tracking the routes of a sedentary aquatic invader with mobile parasitic larvae.

Publications

Modelling the invasion history of <i>Sinanodonta woodiana</i> in Europe: Tracking the routes of a sedentary aquatic invader with mobile parasitic larvae.

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