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dc.contributor.authorDoncaster, C. Patrick
dc.contributor.authorEdwards, Mary E.
dc.contributor.authorClarke, Charlotte L.
dc.contributor.authorAlsos, Inger Greve
dc.date.accessioned2023-08-16T06:34:27Z
dc.date.available2023-08-16T06:34:27Z
dc.date.issued2023-05-19
dc.description.abstractInternal and external factors regulating the past composition of plant communities are difficult to identify in palaeo-vegetation records. Here, we develop an index of relative entropy of community assembly, which applies to changes in the composition of a community over time, measuring disorder in its assembly relative to disassembly. Historical periods of relatively ordered assembly (negative index values) are characteristic of a community undergoing endogenous self-organisation, in contrast to relatively disordered assembly (positive values) characterising periods of exogenous abiotic forcing. We quantified the relative entropy index for a 22,000-year time-series of tundra vegetation obtained in the Polar Urals, based on sedimentary DNA. We find it most positive during the Late Pleistocene characterized by persistent taxa, and most negative during the post-glacial Holocene characterized by more ephemeral floras. Changes in relative entropy coincide with changes in regional temperature as reconstructed from stable oxygen composition of an Arctic ice-core. Our results suggest that temperature strongly influenced community assembly in the Polar Urals until about 9000 years before present, after which endogenous community self-organization prevailed through to the present. We conclude that time-series of community composition can reveal changes in the balance between internal and external influences on taxonomic turnover and resulting diversity.en_US
dc.identifier.citationDoncaster, Edwards, Clarke, Alsos. The drivers of plant community composition have shifted from external to internal processes over the past 20,000 years. Communications Earth & Environment. 2023;4(1)en_US
dc.identifier.cristinIDFRIDAID 2154627
dc.identifier.doi10.1038/s43247-023-00834-1
dc.identifier.issn2662-4435
dc.identifier.urihttps://hdl.handle.net/10037/29960
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.relation.journalCommunications Earth & Environment
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2023 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleThe drivers of plant community composition have shifted from external to internal processes over the past 20,000 yearsen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)