Advanced search
1 file | 3.38 MB

Genetic structure and seed-mediated dispersal rates of an endangered shrub in a fragmented landscape: a case study for Juniperus communis in northwestern Europe

Author
Organization
Abstract
Background: Population extinction risk in a fragmented landscape is related to the differential ability of the species to spread its genes across the landscape. The impact of landscape fragmentation on plant population dynamics will therefore vary across different spatial scales. We quantified successful seed-mediated dispersal of the dioecious shrub Juniperus communis in a fragmented landscape across northwestern Europe by using amplified fragment length polymorphism (AFLP) markers. Furthermore we investigated the genetic diversity and structure on two spatial scales: across northwestern Europe and across Flanders (northern Belgium). We also studied whether seed viability and populations size were correlated with genetic diversity. Results: Unexpectedly, estimated seed-mediated dispersal rates were quite high and ranged between 3% and 14%. No population differentiation and no spatial genetic structure were detected on the local, Flemish scale. A significant low to moderate genetic differentiation between populations was detected at the regional, northwest European scale (PhiPT = 0.10). In general, geographically nearby populations were also genetically related. High levels of within-population genetic diversity were detected but no correlation was found between any genetic diversity parameter and population size or seed viability. Conclusions: In northwestern Europe, landscape fragmentation has lead to a weak isolation-by-distance pattern but not to genetic impoverishment of common juniper. Substantial rates of successful migration by seed-mediated gene flow indicate a high dispersal ability which could enable Juniperus communis to naturally colonize suitable habitats. However, it is not clear whether the observed levels of migration will suffice to counterbalance the effects of genetic drift in small populations on the long run.
Keywords
QUATERNARY REFUGIA, POSTGLACIAL COLONIZATION, DISTANCE, AFLP MARKERS, COMPUTER-PROGRAM, PLANT-POPULATIONS, FLOW, NORTH-WESTERN BELGIUM, POPULATION-STRUCTURE, LENGTH POLYMORPHISM DATA

Downloads

  • VandenBroeck 2011 BMCG 12 a73.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 3.38 MB

Citation

Please use this url to cite or link to this publication:

Chicago
Vanden Broeck, An, Robert Gruwez, Karen Cox, Sandy Adriaenssens, Inga M Michalczyk, and Kris Verheyen. 2011. “Genetic Structure and Seed-mediated Dispersal Rates of an Endangered Shrub in a Fragmented Landscape: a Case Study for Juniperus Communis in Northwestern Europe.” Bmc Genetics 12.
APA
Vanden Broeck, An, Gruwez, R., Cox, K., Adriaenssens, S., Michalczyk, I. M., & Verheyen, K. (2011). Genetic structure and seed-mediated dispersal rates of an endangered shrub in a fragmented landscape: a case study for Juniperus communis in northwestern Europe. BMC GENETICS, 12.
Vancouver
1.
Vanden Broeck A, Gruwez R, Cox K, Adriaenssens S, Michalczyk IM, Verheyen K. Genetic structure and seed-mediated dispersal rates of an endangered shrub in a fragmented landscape: a case study for Juniperus communis in northwestern Europe. BMC GENETICS. 2011;12.
MLA
Vanden Broeck, An, Robert Gruwez, Karen Cox, et al. “Genetic Structure and Seed-mediated Dispersal Rates of an Endangered Shrub in a Fragmented Landscape: a Case Study for Juniperus Communis in Northwestern Europe.” BMC GENETICS 12 (2011): n. pag. Print.
@article{1887165,
  abstract     = {Background: Population extinction risk in a fragmented landscape is related to the differential ability of the species to spread its genes across the landscape. The impact of landscape fragmentation on plant population dynamics will therefore vary across different spatial scales. We quantified successful seed-mediated dispersal of the dioecious shrub Juniperus communis in a fragmented landscape across northwestern Europe by using amplified fragment length polymorphism (AFLP) markers. Furthermore we investigated the genetic diversity and structure on two spatial scales: across northwestern Europe and across Flanders (northern Belgium). We also studied whether seed viability and populations size were correlated with genetic diversity. 
Results: Unexpectedly, estimated seed-mediated dispersal rates were quite high and ranged between 3\% and 14\%. No population differentiation and no spatial genetic structure were detected on the local, Flemish scale. A significant low to moderate genetic differentiation between populations was detected at the regional, northwest European scale (PhiPT = 0.10). In general, geographically nearby populations were also genetically related. High levels of within-population genetic diversity were detected but no correlation was found between any genetic diversity parameter and population size or seed viability. 
Conclusions: In northwestern Europe, landscape fragmentation has lead to a weak isolation-by-distance pattern but not to genetic impoverishment of common juniper. Substantial rates of successful migration by seed-mediated gene flow indicate a high dispersal ability which could enable Juniperus communis to naturally colonize suitable habitats. However, it is not clear whether the observed levels of migration will suffice to counterbalance the effects of genetic drift in small populations on the long run.},
  articleno    = {73},
  author       = {Vanden Broeck, An and Gruwez, Robert and Cox, Karen and Adriaenssens, Sandy and Michalczyk, Inga M and Verheyen, Kris},
  issn         = {1471-2156},
  journal      = {BMC GENETICS},
  keyword      = {QUATERNARY REFUGIA,POSTGLACIAL COLONIZATION,DISTANCE,AFLP MARKERS,COMPUTER-PROGRAM,PLANT-POPULATIONS,FLOW,NORTH-WESTERN BELGIUM,POPULATION-STRUCTURE,LENGTH POLYMORPHISM DATA},
  language     = {eng},
  pages        = {16},
  title        = {Genetic structure and seed-mediated dispersal rates of an endangered shrub in a fragmented landscape: a case study for Juniperus communis in northwestern Europe},
  url          = {http://dx.doi.org/10.1186/1471-2156-12-73},
  volume       = {12},
  year         = {2011},
}

Altmetric
View in Altmetric
Web of Science
Times cited: