Genomic analyses reveal three independent introductions of the invasive brown rat (Rattus norvegicus) to the Faroe Islands

  title={Genomic analyses reveal three independent introductions of the invasive brown rat (Rattus norvegicus) to the Faroe Islands},
  author={Emily E. Puckett and Eydfinn Magnussen and L. A. Khlyap and Tanja M Strand and {\AA}ke Lundkvist and Jason Munshi‐South},
Population genomics offers innovative approaches to test hypotheses related to the source and timing of introduction of invasive species. These approaches are particularly appropriate to study colonization of island ecosystems. The brown rat is a cold-hardy global invasive that has reached most of the world’s island ecosystems, including even highly isolated archipelagoes such as the Faroe Islands in the North Atlantic Ocean. Historic records tell of rats rafting to the southern island of Su… 
Travel Tales of a Worldwide Weed: Genomic Signatures of Plantago major L. Reveal Distinct Genotypic Groups With Links to Colonial Trade Routes
It is shown that genotype groups are latitudinally restricted, and that more than one successful genotype colonized and spread into the introduced ranges, and three of the most prevalent genotypes present in the native Eurasian range gave rise to introduced populations in the Americas, Africa, Australia, and New Zealand.
The Promise of Genetics and Genomics for Improving Invasive Mammal Management on Islands
Invasive species are major contributors to global biodiversity decline. Invasive mammalian species (IMS), in particular, have profound negative effects in island systems that contain
Insights into invasive species from whole‐genome resequencing
This work surveys the literature to assess the application of whole‐genome resequencing data in invasion biology and confirms the importance of processes such as balancing selection and hybridization in allowing invasive species to reuse existing adaptations and rapidly overcome the challenges of a foreign ecosystem.
The reconstruction of invasion histories with genomic data in light of differing levels of anthropogenic transport
Unravelling the history of range shifts is key for understanding past, current and future species distributions. Anthropogenic transport of species alters natural dispersal patterns and directly


Multiple Geographic Origins of Commensalism and Complex Dispersal History of Black Rats
Three of the four phylogenetic lineage units within R. rattus show clear genetic signatures of major population expansion in prehistoric times, and the distribution of particular haplogroups mirrors archaeologically and historically documented patterns of human dispersal and trade.
Comparative phylogeography of invasive Rattus rattus and Rattus norvegicus in the U.S. reveals distinct colonization histories and dispersal
Comparing the colonization history, patterns of gene flow, and levels of genetic diversity of Rattus rattus and R. norvegicus in the U.S. and their implications for invasive species in general are discussed, as well as the implications for managing the spread of rat-borne pathogens.
Global population divergence and admixture of the brown rat (Rattus norvegicus)
The global phylogeography of brown rats is inferred using 32k SNPs to reconstruct invasion routes from estimates of population divergence and admixture and an astonishing degree of fine-grained clustering found both between and within sampling sites underscored the extent to which urban heterogeneity can shape the genetic structure of commensal rodents.
Invasion facilitates hybridization with introgression in the Rattus rattus species complex
Two mitochondrial lineages that have spread to multiple continents are revealed, including a previously undiscovered population of R. tanezumi in the south‐eastern United States and R. rattus IV in Asia, although further sampling of the latter species pair in Asia is required.
Genomic analyses identify multiple Asian origins and deeply diverged mitochondrial clades in inbred brown rats (Rattus norvegicus)
It is posit that rats originally collected for captive breeding had high mitochondrial diversity that became fixed through genetic drift and/or artificial selection and opportunities exist to create new strains with diverse genomic backgrounds to provide novel insight into the genomic basis of disease phenotypes.
Spatial population genomics of the brown rat (Rattus norvegicus) in New York City
While some urban populations of human commensals may appear to be continuously distributed, landscape heterogeneity within cities can drive differences in habitat quality and dispersal, with implications for the spatial distribution of genomic variation, population management and the study of widely distributed pests.
A genome-wide perspective on the evolutionary history of enigmatic wolf-like canids.
It is found that these enigmatic canids are highly admixed varieties derived from gray wolves and coyotes, respectively, and divergent genomic history suggests that they do not have a shared recent ancestry as proposed by previous researchers.
Recent Evolution in Rattus norvegicus Is Shaped by Declining Effective Population Size
It is inferred that there has been a recent population size bottleneck in wild rats, which is date to approximately 20,000 years ago and leads to negative estimates of the rate of adaptive evolution in proteins and conserved noncoding elements, compared to strongly positive estimates observed in wild house mice.
Brown rat demography reveals pre-commensal structure in eastern Asia prior to expansion into Southeast Asia
The results support the hypothesis that northern Asia was the ancestral range for brown rats and suggest that southward human migration across China between 800-1550s AD resulted in the introduction of rats to SE Asia, from which they rapidly expanded via existing maritime trade routes.
Where did the rats of Big South Cape Island come from
The ship rat invasion of Big South Cape Island was neither by swimming nor boat transport from Stewart Island, and is unlikely to have come from the south coast ports of New Zealand, but it is confirmed that the invasion likely originated from some distance.