scholarly journals Same Invasion, Different Routes: Helminth Assemblages May Favor the Invasion Success of the House Mouse in Senegal

2021 ◽  
Vol 8 ◽  
Author(s):  
Christophe Diagne ◽  
Laurent Granjon ◽  
Caroline Tatard ◽  
Alexis Ribas ◽  
Arame Ndiaye ◽  
...  
Keyword(s):  
House Mouse ◽  
Native Species ◽  
Invasion Success ◽  
Enemy Release ◽  
Mus Musculus Domesticus ◽  
Invasion Pathways ◽  
Invasion Fronts ◽  
Invasion Routes ◽  
Rodent Communities

Previous field-based studies have evidenced patterns in gastrointestinal helminth (GIH) assemblages of rodent communities that are consistent with “enemy release” and “spill-back” hypotheses, suggesting a role of parasites in the ongoing invasion success of the exotic house mouse (Mus musculus domesticus) in Senegal (West Africa). However, these findings came from a single invasion route, thus preventing to ascertain that they did not result from stochastic and/or selective processes that could differ across invasion pathways. In the present study, we investigated the distribution of rodent communities and their GIH assemblages in three distinct zones of Northern Senegal, which corresponded to independent house mouse invasion fronts. Our findings first showed an unexpectedly rapid spread of the house mouse, which reached even remote areas where native species would have been expected to dominate the rodent communities. They also strengthened previous insights suggesting a role of helminths in the invasion success of the house mouse, such as: (i) low infestation rates of invading mice by the exotic nematode Aspiculuris tetraptera at invasion fronts—except in a single zone where the establishment of the house mouse could be older than initially thought, which was consistent with the “enemy release” hypothesis; and (ii) higher infection rates by the local cestode Mathevotaenia symmetrica in native rodents with long co-existence history with invasive mice, bringing support to the “spill-back” hypothesis. Therefore, “enemy release” and “spill-back” mechanisms should be seriously considered when explaining the invasion success of the house mouse—provided further experimental works demonstrate that involved GIHs affect rodent fitness or exert selective pressures. Next steps should also include evolutionary, immunological, and behavioral perspectives to fully capture the complexity, causes and consequences of GIH variations along these invasion routes.

scholarly journals Differential immune gene expression associated with contemporary range expansion of two invasive rodents in Senegal

2018 ◽  
Author(s):  
Nathalie Charbonnel ◽  
Maxime Galan ◽  
Caroline Tatard ◽  
Anne Loiseau ◽  
Christophe Amidi Diagne ◽  
...  
Keyword(s):  
Gene Expression ◽  
House Mouse ◽  
Expression Profiles ◽  
Rattus Rattus ◽  
Invasion Success ◽  
Phenotypic Traits ◽  
Immune Gene ◽  
Mus Musculus Domesticus ◽  
Black Rat ◽  
Invasion Routes

BackgroundBiological invasions are major anthropogenic changes associated with threats to biodiversity and health. What determines the successful establishment of introduced populations still remains unsolved. Here we explore the appealing assertion that invasion success relies on immune phenotypic traits that would be advantageous in recently invaded sites.ResultsWe compared gene expression profiles between anciently and recently established populations of two major invading species, the house mouse Mus musculus domesticus and the black rat Rattus rattus, in Senegal. Transcriptome analyses revealed respectively 364 and 83 differentially expressed genes along the mouse and rat invasion routes. Among them, 20.0% and 10.6% were annotated with functions related to immunity. All immune-related genes detected along the mouse invasion route were over-expressed in recently invaded sites. Genes of the complement activation pathway were over-represented. Results were less straightforward when considering the black rat as no particular immunological process was over-represented.ConclusionsWe revealed changes in transcriptome profiles along invasion routes. Patterns differed between both invasive species. These changes potentially be driven by increased infection risks in recently invaded sites for the house mouse and stochastic events associated with colonization history for the black rat. These results provide a first step in identifying the immune ecoevolutionary processes potentially involved in invasion success.

scholarly journals Parasites and invasions: changes in gastrointestinal helminth assemblages in invasive and native rodents in senegal

2016 ◽  
Author(s):  
Christophe Diagne ◽  
Alexis Ribas ◽  
Nathalie Charbonnel ◽  
Ambroise Dalecky ◽  
Caroline Tatard ◽  
...  
Keyword(s):  
Rattus Rattus ◽  
Enemy Release Hypothesis ◽  
Hymenolepis Diminuta ◽  
Invasion Success ◽  
Transmission Risk ◽  
Enemy Release ◽  
Individual Species ◽  
Mus Musculus Domesticus ◽  
Gastrointestinal Helminth ◽  
Invasion Fronts

AbstractUnderstanding why some exotic species become widespread and abundant in their colonized range is a fundamental issue that still needs to be addressed. Among many hypotheses, newly established host populations may benefit from a parasite loss (“enemy release” hypothesis) through impoverishment of their original parasite communities or reduced infection levels. Moreover, the fitness of competing native hosts may be affected by the acquisition of exotic taxa from invaders (“parasite spillover”) and/or by an increased transmission risk of native parasites due to their amplification by invaders (“parasite spillback”). We focused on gastrointestinal helminth communities to determine whether these predictions could explain the ongoing invasion success of the commensal house mouse (Mus musculus domesticus) and black rat (Rattus rattus), as well as the associated drop of native Mastomys species, in Senegal. For both invasive species, our results were consistent with the predictions of the enemy release hypothesis. A decrease of helminth overall prevalence and individual species richness was observed along the invasion gradients as well as lower specific prevalence/abundance (Aspiculuris tetraptera in M. m. domesticus, Hymenolepis diminuta in R. rattus) on the invasion fronts. Conversely, we did not find strong evidence of helminth spill-over or spill-back in invasion fronts, where native and invasive rodents co-occurred. Further experimental research is needed to determine whether and how the loss of helminths and reduced infection levels along invasion routes may result in any advantageous effects on invader fitness and competitive advantage.

scholarly journals Native turncoats and indirect facilitation of species invasions

2018 ◽  
Vol 285 (1871) ◽  
pp. 20171936 ◽  
Author(s):  
Tobin D. Northfield ◽  
Susan G. W. Laurance ◽  
Margaret M. Mayfield ◽  
Dean R. Paini ◽  
William E. Snyder ◽  
...  
Keyword(s):  
Invasive Species ◽  
Native Species ◽  
Potential Role ◽  
Indirect Interactions ◽  
Invasion Success ◽  
Competitive Interactions ◽  
Species Invasion ◽  
Species Invasions ◽  
Indirect Facilitation

At local scales, native species can resist invasion by feeding on and competing with would-be invasive species. However, this relationship tends to break down or reverse at larger scales. Here, we consider the role of native species as indirect facilitators of invasion and their potential role in this diversity-driven ‘invasion paradox’. We coin the term ‘native turncoats’ to describe native facilitators of non-native species and identify eight ways they may indirectly facilitate species invasion. Some are commonly documented, while others, such as indirect interactions within competitive communities, are largely undocumented in an invasion context. Therefore, we use models to evaluate the likelihood that these competitive interactions influence invasions. We find that native turncoat effects increase with the number of resources and native species. Furthermore, our findings suggest the existence, abundance and effectiveness of native turncoats in a community could greatly influence invasion success at large scales.

scholarly journals Biological invasions in rodent communities: from ecological interactions to zoonotic bacterial infection issues

2017 ◽  
Author(s):  
Christophe Diagne ◽  
M. Galan ◽  
Lucie Tamisier ◽  
Jonathan d’Ambrosio ◽  
Ambroise Dalecky ◽  
...  
Keyword(s):  
Disease Risk ◽  
Rattus Rattus ◽  
Experimental Studies ◽  
Amplicon Sequencing ◽  
Invasion Success ◽  
Enemy Release ◽  
Ecological Interactions ◽  
Invasion Process ◽  
Mus Musculus Domesticus ◽  
Zoonotic Bacteria

AbstractSeveral hypotheses (such as ‘enemy release’, ‘novel weapon’, ‘spillback’ and ‘dilution/density effect’) suggest changes in host-parasite ecological interactions during biological invasion events. Such changes can impact both invasion process outcome and the dynamics of exotic and/or endemic zoonotic diseases. To evaluate these predictions, we investigated the ongoing invasions of the house mouse Mus musculus domesticus, and the black rat, Rattus rattus, in Senegal (West Africa). We focused on zoonotic bacterial communities depicted using 16S rRNA amplicon sequencing approach in both invasive and native rodents sampled along two well-defined invasion routes. Overall, this study provided new ecological evidence connecting parasitism and rodent invasion process, with diverse potential roles of zoonotic bacteria in the invasion success. Our results also highlighted the main factors that lie behind bacterial community structure in commensal rodents. Further experimental studies as well as comparative spatio-temporal surveys are necessary to decipher the actual role of zoonotic bacteria in these invasions. Our data also gave new support for the difficulty to predict the direction in which the relationship between biodiversity changes and disease risk could go. These results should be used as a basis for public health prevention services to design reservoir monitoring strategies based on multiple pathogen surveillance.

scholarly journals Tree diversity regulates forest pest invasion

2019 ◽  
Vol 116 (15) ◽  
pp. 7382-7386 ◽  
Author(s):  
Qinfeng Guo ◽  
Songlin Fei ◽  
Kevin M. Potter ◽  
Andrew M. Liebhold ◽  
Jun Wen
Keyword(s):  
Species Diversity ◽  
Native Species ◽  
Large Scale ◽  
Tree Diversity ◽  
Ecological Impacts ◽  
Invasion Success ◽  
Small Scale ◽  
Forest Pest ◽  
Natural Ecosystems

Nonnative pests often cause cascading ecological impacts, leading to detrimental socioeconomic consequences; however, how plant diversity may influence insect and disease invasions remains unclear. High species diversity in host communities may promote pest invasions by providing more niches (i.e., facilitation), but it can also diminish invasion success because low host dominance may make it more difficult for pests to establish (i.e., dilution). Most studies to date have focused on small-scale, experimental, or individual pest/disease species, while large-scale empirical studies, especially in natural ecosystems, are extremely rare. Using subcontinental-level data, we examined the role of tree diversity on pest invasion across the conterminous United States and found that the tree-pest diversity relationships are hump-shaped. Pest diversity increases with tree diversity at low tree diversity (because of facilitation or amplification) and is reduced at higher tree diversity (as a result of dilution). Thus, tree diversity likely regulates forest pest invasion through both facilitation and dilution that operate simultaneously, but their relative strengths vary with overall diversity. Our findings suggest the role of native species diversity in regulating nonnative pest invasions.

Insights from community ecology into the role of enemy release in causing invasion success: the importance of native enemy effects

2014 ◽  
Vol 17 (5) ◽  
pp. 1283-1297 ◽  
Author(s):  
Kirsten M. Prior ◽  
Thomas H. Q. Powell ◽  
Ashley L. Joseph ◽  
Jessica J. Hellmann
Keyword(s):  
Community Ecology ◽  
Invasion Success ◽  
Enemy Release

scholarly journals Differential immune gene expression associated with contemporary range expansion in two invasive rodents in Senegal

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Nathalie Charbonnel ◽  
Maxime Galan ◽  
Caroline Tatard ◽  
Anne Loiseau ◽  
Christophe Diagne ◽  
...  
Keyword(s):  
Gene Expression ◽  
Differential Expression ◽  
House Mouse ◽  
Expression Profiles ◽  
Rattus Rattus ◽  
Gene Expression Profiles ◽  
Invasion Success ◽  
Immune Gene ◽  
Mus Musculus Domesticus ◽  
Black Rat

Abstract Biological invasions are major anthropogenic changes associated with threats to biodiversity and health. However, what determines the successful establishment and spread of introduced populations remains unclear. Here, we explore several hypotheses linking invasion success and immune phenotype traits, including those based on the evolution of increased competitive ability concept. We compared gene expression profiles between anciently and recently established populations of two major invading species, the house mouse Mus musculus domesticus and the black rat Rattus rattus, in Senegal (West Africa). Transcriptome analyses identified differential expression between anciently and recently established populations for 364 mouse genes and 83 rat genes. All immune-related genes displaying differential expression along the mouse invasion route were overexpressed at three of the four recently invaded sites studied. Complement activation pathway genes were overrepresented among these genes. By contrast, no particular immunological process was found to be overrepresented among the differentially expressed genes of black rat. Changes in transcriptome profiles were thus observed along invasion routes, but with different specific patterns between the two invasive species. These changes may be driven by increases in infection risks at sites recently invaded by the house mouse, and by stochastic events associated with colonization history for the black rat. These results constitute a first step toward the identification of immune eco-evolutionary processes potentially involved in the invasion success of these two rodent species.

scholarly journals Genetic recombination variation in wild Robertsonian mice: on the role of chromosomal fusions and Prdm9 allelic background

2014 ◽  
Vol 281 (1786) ◽  
pp. 20140297 ◽  
Author(s):  
Laia Capilla ◽  
Nuria Medarde ◽  
Alexandra Alemany-Schmidt ◽  
Maria Oliver-Bonet ◽  
Jacint Ventura ◽  
...  
Keyword(s):  
House Mouse ◽  
Genetic Recombination ◽  
Chromosomal Rearrangements ◽  
Evolutionary Process ◽  
Genome Shuffling ◽  
Mus Musculus Domesticus ◽  
Recombination Rates ◽  
Chromosomal Distribution ◽  
Epigenetic Signatures

Despite the existence of formal models to explain how chromosomal rearrangements can be fixed in a population in the presence of gene flow, few empirical data are available regarding the mechanisms by which genome shuffling contributes to speciation, especially in mammals. In order to shed light on this intriguing evolutionary process, here we present a detailed empirical study that shows how Robertsonian (Rb) fusions alter the chromosomal distribution of recombination events during the formation of the germline in a Rb system of the western house mouse ( Mus musculus domesticus ). Our results indicate that both the total number of meiotic crossovers and the chromosomal distribution of recombination events are reduced in mice with Rb fusions and that this can be related to alterations in epigenetic signatures for heterochromatinization. Furthermore, we detected novel house mouse Prdm9 allelic variants in the Rb system. Remarkably, mean recombination rates were positively correlated with a decrease in the number of ZnF domains in the Prdm9 gene. The suggestion that recombination can be modulated by both chromosomal reorganizations and genetic determinants that control the formation of double-stranded breaks during meiosis opens new avenues for understanding the role of recombination in chromosomal speciation.

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