Dispersal and gene flow in the rare, parasitic Large Blue butterfly Maculinea arion
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Dispersal and gene flow in the rare, parasitic Large Blue butterfly Maculinea arion. / Ugelvig, Line Vej; Andersen, Anne; Boomsma, Jacobus Jan; Nash, David Richard.
In: Molecular Ecology, Vol. 21, No. 13, 2012, p. 3224-3236.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Dispersal and gene flow in the rare, parasitic Large Blue butterfly Maculinea arion
AU - Ugelvig, Line Vej
AU - Andersen, Anne
AU - Boomsma, Jacobus Jan
AU - Nash, David Richard
N1 - © 2012 Blackwell Publishing Ltd.
PY - 2012
Y1 - 2012
N2 - Dispersal is crucial for gene flow and often determines the long-term stability of meta-populations, particularly in rare species with specialized life cycles. Such species are often foci of conservation efforts because they suffer disproportionally from degradation and fragmentation of their habitat. However, detailed knowledge of effective gene flow through dispersal is often missing, so that conservation strategies have to be based on mark-recapture observations that are suspected to be poor predictors of long-distance dispersal. These constraints have been especially severe in the study of butterfly populations, where microsatellite markers have been difficult to develop. We used eight microsatellite markers to analyse genetic population structure of the Large Blue butterfly Maculinea arion in Sweden. During recent decades, this species has become an icon of insect conservation after massive decline throughout Europe and extinction in Britain followed by reintroduction of a seed population from the Swedish island of Öland. We find that populations are highly structured genetically, but that gene flow occurs over distances 15 times longer than the maximum distance recorded from mark-recapture studies, which can only be explained by maximum dispersal distances at least twice as large as previously accepted. However, we also find evidence that gaps between sites with suitable habitat exceeding ~20km induce genetic erosion that can be detected from bottleneck analyses. Although further work is needed, our results suggest that M. arion can maintain fully functional metapopulations when they consist of optimal habitat patches that are no further apart than ~10km.
AB - Dispersal is crucial for gene flow and often determines the long-term stability of meta-populations, particularly in rare species with specialized life cycles. Such species are often foci of conservation efforts because they suffer disproportionally from degradation and fragmentation of their habitat. However, detailed knowledge of effective gene flow through dispersal is often missing, so that conservation strategies have to be based on mark-recapture observations that are suspected to be poor predictors of long-distance dispersal. These constraints have been especially severe in the study of butterfly populations, where microsatellite markers have been difficult to develop. We used eight microsatellite markers to analyse genetic population structure of the Large Blue butterfly Maculinea arion in Sweden. During recent decades, this species has become an icon of insect conservation after massive decline throughout Europe and extinction in Britain followed by reintroduction of a seed population from the Swedish island of Öland. We find that populations are highly structured genetically, but that gene flow occurs over distances 15 times longer than the maximum distance recorded from mark-recapture studies, which can only be explained by maximum dispersal distances at least twice as large as previously accepted. However, we also find evidence that gaps between sites with suitable habitat exceeding ~20km induce genetic erosion that can be detected from bottleneck analyses. Although further work is needed, our results suggest that M. arion can maintain fully functional metapopulations when they consist of optimal habitat patches that are no further apart than ~10km.
KW - Animals
KW - Butterflies
KW - Conservation of Natural Resources
KW - Ecosystem
KW - Gene Flow
KW - Genetics, Population
KW - Microsatellite Repeats
KW - Molecular Sequence Data
KW - Phylogeny
KW - Population Dynamics
KW - Sequence Analysis, DNA
KW - Sweden
U2 - 10.1111/j.1365-294X.2012.05592.x
DO - 10.1111/j.1365-294X.2012.05592.x
M3 - Journal article
C2 - 22548466
VL - 21
SP - 3224
EP - 3236
JO - Molecular Ecology
JF - Molecular Ecology
SN - 0962-1083
IS - 13
ER -
ID: 43238017