TY - JOUR
T1 - Enemy release and genetic founder effects in invasive killer shrimp populations of Great Britain
AU - Arundell, Katie
AU - Dunn, Alison
AU - Alexander, Jenna Louise
AU - Shearman, Robert
AU - Archer, Natasha Louise
AU - Ironside, Joe
N1 - Funding Information:
This research project was supported by a Small Ecological Project Grant from the British Ecological Society. The authors would like to thank the Environment Agency for providing samples of D. villosus for use in this project.
Publisher Copyright:
© 2014, Springer International Publishing Switzerland.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - The predatory “killer shrimp” Dikerogammarus villosus invaded Britain from mainland Europe in 2010. Originating in the Ponto-Caspian region, this invader has caused significant degradation of European freshwater ecosystems by predating and competitively excluding native invertebrate species. In contrast to continental Europe, in which invasions occurred through the migration of large numbers of individuals along rivers and canals, the invasion of Great Britain must have involved long distance dispersal across the sea. This makes the loss of genetic diversity and of debilitating parasites more likely. Analysis of nuclear microsatellite loci and mitochondrial DNA sequences of D. villosus samples from the four known populations in Britain reveal loss of rare alleles, in comparison to reference populations from the west coast of continental Europe. Screening of the British D. villosus populations by PCR detected no microsporidian parasites, in contrast with continental populations of D. villosus and native amphipod populations, most of which are infected with microsporidia. These findings suggest that the initial colonisation of Great Britain and subsequent long distance dispersal within Britain were associated with genetic founder effects and enemy release due to loss of parasites. Such effects are also likely to occur during future long-distance dispersal events of D. villosus to Ireland or North America.
AB - The predatory “killer shrimp” Dikerogammarus villosus invaded Britain from mainland Europe in 2010. Originating in the Ponto-Caspian region, this invader has caused significant degradation of European freshwater ecosystems by predating and competitively excluding native invertebrate species. In contrast to continental Europe, in which invasions occurred through the migration of large numbers of individuals along rivers and canals, the invasion of Great Britain must have involved long distance dispersal across the sea. This makes the loss of genetic diversity and of debilitating parasites more likely. Analysis of nuclear microsatellite loci and mitochondrial DNA sequences of D. villosus samples from the four known populations in Britain reveal loss of rare alleles, in comparison to reference populations from the west coast of continental Europe. Screening of the British D. villosus populations by PCR detected no microsporidian parasites, in contrast with continental populations of D. villosus and native amphipod populations, most of which are infected with microsporidia. These findings suggest that the initial colonisation of Great Britain and subsequent long distance dispersal within Britain were associated with genetic founder effects and enemy release due to loss of parasites. Such effects are also likely to occur during future long-distance dispersal events of D. villosus to Ireland or North America.
KW - dikerogammarus villosus
KW - Great Britain
KW - microsporidia
KW - genetics
KW - enemy release
KW - Dikerogammarus villosus
KW - Genetics
KW - Enemy release
KW - Microsporidia
UR - http://hdl.handle.net/2160/30434
UR - https://link.springer.com/article/10.1007%2Fs10530-014-0806-y#Sec10
UR - http://www.scopus.com/inward/record.url?scp=84940000163&partnerID=8YFLogxK
U2 - 10.1007/s10530-014-0806-y
DO - 10.1007/s10530-014-0806-y
M3 - Article
SN - 1387-3547
VL - 17
SP - 1439
EP - 1451
JO - Biological Invasions
JF - Biological Invasions
IS - 5
ER -