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2020-09-22Zeitschriftenartikel DOI: 10.18452/24499
Source pools and disharmony of the world's island floras
dc.contributor.authorKönig, Christian
dc.contributor.authorWeigelt, Patrick
dc.contributor.authorTaylor, Amanda
dc.contributor.authorStein, Anke
dc.contributor.authorDawson, Wayne
dc.contributor.authorEssl, Franz
dc.contributor.authorPergl, Jan
dc.contributor.authorPyšek, Petr
dc.contributor.authorvan Kleunen, Mark
dc.contributor.authorWinter, Marten
dc.contributor.authorChatelain, Cyrille
dc.contributor.authorWieringa, Jan
dc.contributor.authorKrestov, Pavel
dc.contributor.authorKreft, Holger
dc.date.accessioned2022-04-21T11:26:34Z
dc.date.available2022-04-21T11:26:34Z
dc.date.issued2020-09-22none
dc.identifier.other10.1111/ecog.05174
dc.identifier.urihttp://edoc.hu-berlin.de/18452/25167
dc.description.abstractIsland disharmony refers to the biased representation of higher taxa on islands compared to their mainland source regions and represents a central concept in island biology. Here, we develop a generalizable framework for approximating these source regions and conduct the first global assessment of island disharmony and its underlying drivers. We compiled vascular plant species lists for 178 oceanic islands and 735 mainland regions. Using mainland data only, we modelled species turnover as a function of environmental and geographic distance and predicted the proportion of shared species between each island and mainland region. We then quantified the over- or under-representation of families on individual islands (representational disharmony) by contrasting the observed number of species against a null model of random colonization from the mainland source pool, and analysed the effects of six family-level functional traits on the resulting measure. Furthermore, we aggregated the values of representational disharmony per island to characterize overall taxonomic bias of a given flora (compositional disharmony), and analysed this second measure as a function of four island biogeographical variables. Our results indicate considerable variation in representational disharmony both within and among plant families. Examples of generally over-represented families include Urticaceae, Convolvulaceae and almost all pteridophyte families. Other families such as Asteraceae and Orchidaceae were generally under-represented, with local peaks of over-representation in known radiation hotspots. Abiotic pollination and a lack of dispersal specialization were most strongly associated with an insular over-representation of families, whereas other family-level traits showed minor effects. With respect to compositional disharmony, large, high-elevation islands tended to have the most disharmonic floras. Our results provide important insights into the taxon- and island-specific drivers of disharmony. The proposed framework allows overcoming the limitations of previous approaches and provides a quantitative basis for incorporating functional and phylogenetic approaches into future studies of island disharmony.eng
dc.language.isoengnone
dc.publisherHumboldt-Universität zu Berlin
dc.rights(CC BY 4.0) Attribution 4.0 Internationalger
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectassembly processeseng
dc.subjectbiotic filteringeng
dc.subjectdispersal filteringeng
dc.subjectenvironmental filteringeng
dc.subjectgeneralized dissimilarity modellingeng
dc.subjectisland syndromeseng
dc.subjectsource regionseng
dc.subjectvascular plantseng
dc.subject.ddc570 Biologienone
dc.titleSource pools and disharmony of the world's island florasnone
dc.typearticle
dc.identifier.urnurn:nbn:de:kobv:11-110-18452/25167-9
dc.identifier.doihttp://dx.doi.org/10.18452/24499
dc.type.versionpublishedVersionnone
local.edoc.container-titleEcographynone
local.edoc.pages12none
local.edoc.anmerkungThis article was supported by the German Research Foundation (DFG) and the Open Access Publication Fund of Humboldt-Universität zu Berlin.none
local.edoc.type-nameZeitschriftenartikel
local.edoc.institutionLebenswissenschaftliche Fakultätnone
local.edoc.container-typeperiodical
local.edoc.container-type-nameZeitschrift
local.edoc.container-publisher-nameWiley-Blackwellnone
local.edoc.container-publisher-placeOxford [u.a.]none
local.edoc.container-volume44none
local.edoc.container-issue1none
local.edoc.container-firstpage44none
local.edoc.container-lastpage55none
dc.description.versionPeer Reviewednone
dc.identifier.eissn1600-0587

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