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dc.contributor.author
Hensen, Isabell  
dc.contributor.author
Cierjacks, Arne  
dc.contributor.author
Hirsch, Heidi  
dc.contributor.author
Kessler, Michael  
dc.contributor.author
Romoleroux, Katya  
dc.contributor.author
Renison, Daniel  
dc.contributor.author
Wesche, Karsten  
dc.date.available
2018-04-20T15:23:10Z  
dc.date.issued
2012-03-08  
dc.identifier.citation
Hensen, Isabell; Cierjacks, Arne; Hirsch, Heidi; Kessler, Michael; Romoleroux, Katya; et al.; Historic and recent fragmentation coupled with altitude affect the genetic population structure of one of the world's highest tropical tree line species; Wiley Blackwell Publishing, Inc; Global Ecology And Biogeography; 21; 4; 8-3-2012; 455-464  
dc.identifier.issn
1466-822X  
dc.identifier.uri
http://hdl.handle.net/11336/42829  
dc.description.abstract
Aim. To assess the effects of altitude and historic and recent forest fragmentation on the genetic diversity and structure of the wind-pollinated tropical tree line species Polylepis incana. Location. One of the highest mountain forest regions of the world, located in the Eastern Cordillera of the Ecuadorian Andes. Methods. We compared genetic diversity and structure of adult trees with those of seedlings (n = 118 in both cases) in nine forest stands spanning an altitudinal gradient from 3500 to 4100 m a.s.l. using amplified fragment length polymorphisms(AFLPs). Genetic diversity was calculated as percentage of polymorphic bands (P) and Nei?s expected heterozygosity (He); genetic differentiation was assessed using analysis of molecular variance, FST statistics and Bayesian cluster analysis. Results. Estimates of genetic diversity at the population level were significantly lower in seedlings than in adults. Genetic diversity (He-value) was, in both cases, negatively correlated to altitude and positively correlated to population size in the seedlings. Genetic differentiation of the seedlings was approximately as high (fST = 0.298) as that of the adults (fST = 0.307), and geographical differentiation was clearly reflected in both AFLP profiles, with mountain ridges acting as barriers to gene flow. Main conclusions Our study provides evidence of a historic upslope migration of P. incana in central Ecuador. In addition, it highlights the detrimental effects of unexpectedly strong genetic isolation, both recent and historical, particularly for our wind-pollinated species where the distance between forest stands was less than 25 km. We therefore additionally propose that in habitats with pronounced highmountain landscape structures, gene flow may be hampered to such an extent that species have a more pronounced sensitivity to habitat fragmentation, even among populations of wind-pollinated trees.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
Wiley Blackwell Publishing, Inc  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
Aflps  
dc.subject
Altitudinal Gradient  
dc.subject
Central Andes  
dc.subject
Ecuador  
dc.subject
Genetic Structure  
dc.subject
High-Mountain Forests  
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Life Stages  
dc.subject
Polylepis Incana  
dc.subject.classification
Otras Ciencias Biológicas  
dc.subject.classification
Ciencias Biológicas  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
Historic and recent fragmentation coupled with altitude affect the genetic population structure of one of the world's highest tropical tree line species  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2018-04-16T14:04:16Z  
dc.journal.volume
21  
dc.journal.number
4  
dc.journal.pagination
455-464  
dc.journal.pais
Reino Unido  
dc.journal.ciudad
Londres  
dc.description.fil
Fil: Hensen, Isabell. Martin Luther University of Halle‐Wittenberg; Alemania  
dc.description.fil
Fil: Cierjacks, Arne. Technishe Universitat Berlin; Alemania  
dc.description.fil
Fil: Hirsch, Heidi. Martin Luther University of Halle‐Wittenberg; Alemania  
dc.description.fil
Fil: Kessler, Michael. Universitat Zurich; Suiza  
dc.description.fil
Fil: Romoleroux, Katya. Pontificia Universidad Catolica del Ecuador; Ecuador  
dc.description.fil
Fil: Renison, Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Investigaciones Biológicas y Tecnológicas. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina  
dc.description.fil
Fil: Wesche, Karsten. Senckenberg Museum of Natural History Görlitz; Alemania  
dc.journal.title
Global Ecology And Biogeography  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1466-8238.2011.00691.x  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1111/j.1466-8238.2011.00691.x