Hörandl, Elvira

[["dc.bibliographiccitation.firstpage","716"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Journal of Biogeography"],["dc.bibliographiccitation.lastpage","726"],["dc.bibliographiccitation.volume","43"],["dc.contributor.author","Kirchheimer, Bernhard"],["dc.contributor.author","Schinkel, Christoph C. F."],["dc.contributor.author","Dellinger, Agnes S."],["dc.contributor.author","Klatt, Simone"],["dc.contributor.author","Moser, Dietmar"],["dc.contributor.author","Winkler, Manuela"],["dc.contributor.author","Lenoir, Jonathan"],["dc.contributor.author","Caccianiga, Marco"],["dc.contributor.author","Guisan, Antoine"],["dc.contributor.author","Nieto-Lugilde, Diego"],["dc.contributor.author","Svenning, Jens-Christian"],["dc.contributor.author","Thuiller, Wilfried"],["dc.contributor.author","Vittoz, Pascal"],["dc.contributor.author","Willner, Wolfgang"],["dc.contributor.author","Zimmermann, Niklaus E."],["dc.contributor.author","Hoerandl, Elvira"],["dc.contributor.author","Dullinger, Stefan"],["dc.date.accessioned","2018-11-07T10:16:26Z"],["dc.date.available","2018-11-07T10:16:26Z"],["dc.date.issued","2016"],["dc.description.abstract","AimEmerging polyploids may depend on environmental niche shifts for successful establishment. Using the alpine plant Ranunculus kuepferi as a model system, we explore the niche shift hypothesis at different spatial resolutions and in contrasting parts of the species range. LocationEuropean Alps. MethodsWe sampled 12 individuals from each of 102 populations of R. kuepferi across the Alps, determined their ploidy levels, derived coarse-grain (100x100m) environmental descriptors for all sampling sites by downscaling WorldClim maps, and calculated fine-scale environmental descriptors (2x2m) from indicator values of the vegetation accompanying the sampled individuals. Both coarse and fine-scale variables were further computed for 8239 vegetation plots from across the Alps. Subsequently, we compared niche optima and breadths of diploid and tetraploid cytotypes by combining principal components analysis and kernel smoothing procedures. Comparisons were done separately for coarse and fine-grain data sets and for sympatric, allopatric and the total set of populations. ResultsAll comparisons indicate that the niches of the two cytotypes differ in optima and/or breadths, but results vary in important details. The whole-range analysis suggests differentiation along the temperature gradient to be most important. However, sympatric comparisons indicate that this climatic shift was not a direct response to competition with diploid ancestors. Moreover, fine-grained analyses demonstrate niche contraction of tetraploids, especially in the sympatric range, that goes undetected with coarse-grained data. Main conclusionsAlthough the niche optima of the two cytotypes differ, separation along ecological gradients was probably less decisive for polyploid establishment than a shift towards facultative apomixis, a particularly effective strategy to avoid minority cytotype exclusion. In addition, our results suggest that coarse-grained analyses overestimate niche breadths of widely distributed taxa. Niche comparison analyses should hence be conducted at environmental data resolutions appropriate for the organism and question under study."],["dc.identifier.doi","10.1111/jbi.12663"],["dc.identifier.isi","000373154000007"],["dc.identifier.pmid","27482126"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/13234"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41038"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","1365-2699"],["dc.relation.issn","0305-0270"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","A matter of scale: apparent niche differentiation of diploid and tetraploid plants may depend on extent and grain of analysis"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","392"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Ecology Letters"],["dc.bibliographiccitation.lastpage","401"],["dc.bibliographiccitation.volume","21"],["dc.contributor.author","Kirchheimer, Bernhard"],["dc.contributor.author","Wessely, Johannes"],["dc.contributor.author","Gattringer, Andreas"],["dc.contributor.author","Hülber, Karl"],["dc.contributor.author","Moser, Dietmar"],["dc.contributor.author","Schinkel, Christoph C. F."],["dc.contributor.author","Appelhans, Marc"],["dc.contributor.author","Klatt, Simone"],["dc.contributor.author","Caccianiga, Marco"],["dc.contributor.author","Dellinger, Agnes"],["dc.contributor.author","Guisan, Antoine"],["dc.contributor.author","Kuttner, Michael"],["dc.contributor.author","Lenoir, Jonathan"],["dc.contributor.author","Maiorano, Luigi"],["dc.contributor.author","Nieto-Lugilde, Diego"],["dc.contributor.author","Plutzar, Christoph"],["dc.contributor.author","Svenning, Jens-Christian"],["dc.contributor.author","Willner, Wolfgang"],["dc.contributor.author","Hörandl, Elvira"],["dc.contributor.author","Dullinger, Stefan"],["dc.date.accessioned","2019-07-09T11:45:27Z"],["dc.date.available","2019-07-09T11:45:27Z"],["dc.date.issued","2018"],["dc.description.abstract","Asexual taxa often have larger ranges than their sexual progenitors, particularly in areas affected by Pleistocene glaciations. The reasons given for this 'geographical parthenogenesis' are contentious, with expansion of the ecological niche or colonisation advantages of uniparental reproduction assumed most important in case of plants. Here, we parameterized a spread model for the alpine buttercup Ranunculus kuepferi and reconstructed the joint Holocene range expansion of its sexual and apomictic cytotype across the European Alps under different simulation settings. We found that, rather than niche broadening or a higher migration rate, a shift of the apomict's niche towards colder conditions per se was crucial as it facilitated overcoming of topographical barriers, a factor likely relevant for many alpine apomicts. More generally, our simulations suggest potentially strong interacting effects of niche differentiation and reproductive modes on range formation of related sexual and asexual taxa arising from their differential sensitivity to minority cytotype disadvantage."],["dc.identifier.doi","10.1111/ele.12908"],["dc.identifier.pmid","29349850"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15210"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59232"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation","info:eu-repo/grantAgreement/EC/FP7/310886/EU//HISTFUNC"],["dc.relation.issn","1461-0248"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","570"],["dc.title","Reconstructing geographical parthenogenesis: effects of niche differentiation and reproductive mode on Holocene range expansion of an alpine plant."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]