Source pools and disharmony of the world's island floras

Simple item page
dc.contributor.authorKonig, Christianen_ZA
dc.contributor.authorWeigelt, Patricken_ZA
dc.contributor.authorTaylor, Amandaen_ZA
dc.contributor.authorStein, Ankeen_ZA
dc.contributor.authorDawson, Wayneen_ZA
dc.contributor.authorEssl, Franzen_ZA
dc.contributor.authorPergl, Janen_ZA
dc.contributor.authorPysek, Petren_ZA
dc.contributor.authorVan Kleunen, Marken_ZA
dc.contributor.authorWinter, Martenen_ZA
dc.contributor.authorChatelain, Cyrilleen_ZA
dc.contributor.authorWieringa, Jan J.en_ZA
dc.contributor.authorKrestov, Pavelen_ZA
dc.contributor.authorKreft, Holgeren_ZA
dc.date.accessioned2021-02-11T12:41:14Z
dc.date.accessioned2021-08-27T11:24:47Z
dc.date.available2021-02-11T12:41:14Z
dc.date.available2021-08-27T11:24:47Z
dc.date.issued2020
dc.descriptionCITATION: Konig, C. et al. 2021. Source pools and disharmony of the world's island floras. Ecography, 43:1–12, doi:10.1111/ecog.05174.
dc.descriptionThe original publication is available at https://www.ecography.org
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.
dc.description.versionPublisher's version
dc.format.extent12 pages : illustrations, mapsen_ZA
dc.identifier.citationKonig, C. et al. 2021. Source pools and disharmony of the world's island floras. Ecography, 43:1–12, doi:10.1111/ecog.05174.
dc.identifier.issn1600-0587 (online)
dc.identifier.otherdoi:10.1111/ecog.05174
dc.identifier.urihttp://hdl.handle.net/10019.1/120876
dc.language.isoen
dc.publisherNordic Society Oikos
dc.rights.holderAuthors retain copyright
dc.subjectIsland biologyen_ZA
dc.subjectIsland disharmonyen_ZA
dc.subjectIsland floras -- Ecologyen_ZA
dc.subjectIsland biogeographyen_ZA
dc.titleSource pools and disharmony of the world's island florasen_ZA
dc.typeArticleen_ZA
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Essl-Ecog.05174-2021.pdf
Size:
2.15 MB
Format:
Adobe Portable Document Format
Description:
Download article
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
81 B
Format:
Plain Text
Description:
Download
Collections
Research Articles (Botany and Zoology)