Recent habitat fragmentation due to roads can lead to significant genetic differentiation in an abundant flightless ground beetle

Molecular Ecology
I KellerC R Largiader

Abstract

Although habitat fragmentation is suspected to pose a major threat to biodiversity, its impact on abundant invertebrate species has been little investigated. We assessed the genetic population structure of the flightless ground beetle Abax parallelepipedus in a forest fragmented by two main roads and a highway using five microsatellite loci. We detected low levels of genetic differentiation, which was concordant with the high population densities of 632-1707 individuals/ha estimated with a mark-recapture method. A Mantel test detected a highly significant increase of pairwise F(ST)-values with the number of roads between sampling locations. As expected, the most pronounced effect of the isolation due to roads was observed in the sample from the smallest fragment (highway exit loop), which was differentiated significantly from most other locations. However, no signs of a recent bottleneck or a loss of genetic variability were detected in this population, indicating a still relatively large effective population size (N(e)). Computer simulations confirmed that the observed F(ST)-values were indeed compatible with a N(e) of a few hundred individuals in this fragment, assuming strong or absolute isolation since the construction of t...Continue Reading

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Citations

Sep 29, 2011·Environmental Management·Nuria SelvaPierre L Ibisch
Dec 17, 2011·The Journal of Heredity·Andrea S SequeiraLázaro Roque Albelo
Nov 8, 2012·The Journal of Heredity·Jan Christian HabelSofie Vandewoestijne
Jan 12, 2013·Genetics·Nicolas AlcalaSéverine Vuilleumier
Feb 7, 2014·BMC Evolutionary Biology·Vera M GrazerOliver Y Martin
Jan 15, 2009·Molecular Ecology·B GauffreJ F Cosson
Sep 8, 2010·Molecular Ecology·E L LandguthG Luikart
Sep 5, 2019·Molecular Ecology·Lindsay S MilesBrian C Verrelli
Nov 4, 2017·Science·Marc T J Johnson, Jason Munshi-South

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