title: Landscape genetics of a pollinator longhorn beetle [Typocerus v. velutinus (Olivier)] on a continuous habitat surface.
abstract: Landscape connectivity, the degree to which the landscape structure facilitates or impedes organismal movement and gene flow, is increasingly important to conservationists and land managers. Metrics for describing the undulating shape of continuous habitat surfaces can expand the usefulness of continuous gradient surfaces that describe habitat and predict the flow of organisms and genes. We adopted a landscape gradient model of habitat and used surface metrics of connectivity to model the genetic continuity between populations of the banded longhorn beetle [Typocerus v. velutinus (Olivier)] collected at 17 sites across a fragmentation gradient in Indiana, USA. We tested the hypothesis that greater habitat connectivity facilitates gene flow between beetle populations against a null model of isolation by distance (IBD). We used next-generation sequencing to develop 10 polymorphic microsatellite loci and genotype the individual beetles to assess the population genetic structure. Isolation by distance did not explain the population genetic structure. The surface metrics model of habitat connectivity explained the variance in genetic dissimilarities 30 times better than the IBD model. We conclude that surface metrology of habitat maps is a powerful extension of landscape genetics in heterogeneous landscapes.
authors.affiliation: Department of Entomology, Purdue University, 901 W. State St., West Lafayette, IN, 47907, USA.|Department of Zoology, Faculty of Science, Suez Canal University, Ismailia, 41522, Egypt.
authors.forename: H E M
authors.initials: HE
authors.lastname: Abdel Moniem
authors.affiliation: Department of Entomology, Purdue University, 901 W. State St., West Lafayette, IN, 47907, USA.
authors.forename: B J
authors.initials: BJ
authors.lastname: Schemerhorn
authors.affiliation: Department of Forestry and Natural Resources, Department of Biological Sciences, Purdue University, West Lafayette, IN, 47907, USA.
authors.forename: J A
authors.initials: JA
authors.lastname: DeWoody
authors.affiliation: Department of Entomology, Purdue University, 901 W. State St., West Lafayette, IN, 47907, USA. jdhollan@purdue.edu.
authors.forename: J D
authors.initials: JD
authors.lastname: Holland
mesh_terms: D000818:Animals; D001517:Coleoptera / Q000235:genetics*; D017753:Ecosystem; D051456:Gene Flow; D005788:Gene Pool; D014644:Genetic Variation; D005828:Genetics, Population; D005838:Genotype; D007196:Indiana; D018895:Microsatellite Repeats; D008957:Models, Genetic; D054817:Pollination
keywords: gene flow; habitat connectivity; isolation by distance; landscape configuration; microsatellites; surface metrics