Equilibrium and non-equilibrium phases in the radiation of Hakea and the drivers of diversity in Mediterranean-type ecosystems

dc.contributor.authorSkeels, Alexander
dc.contributor.authorCardillo, Marcel
dc.date.accessioned2021-07-16T01:55:48Z
dc.date.available2021-07-16T01:55:48Z
dc.date.issued2019-07
dc.description.abstractMediterranean‐type ecosystems (MTEs) contain exceptional plant diversity. Explanations for this diversity are usually classed as either “equilibrium,” with elevated MTE diversity resulting from greater ecological carrying capacities, or “non‐equilibrium,” with MTEs having a greater accumulation of diversity over time than other types of ecosystems. These models have typically been considered as mutually exclusive. Here, we present a trait‐based explanatory framework that incorporates both equilibrium and non‐equilibrium dynamics. Using a large continental Australian plant radiation (Hakea) as a case study, we identify traits associated with niche partitioning in coexisting species (α‐traits) and with environmental filtering (β‐traits), and reconstruct the mode and relative timing of diversification of these traits. Our results point to a radiation with an early non‐equilibrium phase marked by divergence of β‐traits as Hakea diversified exponentially and expanded from the southwest Australian MTE into biomes across the Australian continent. This was followed from seven million years ago by an equilibrium phase, marked by diversification of α‐traits and a slowdown in lineage diversification as MTE‐niches became saturated. These results suggest that processes consistent with both equilibrium and non‐equilibrium models have been important during different stages of the radiation of Hakea, and together they provide a richer explanation of present‐day diversity patterns.en_AU
dc.description.sponsorshipA.S. is supported by the Australian Government Research Training Program. M.C. acknowledges support from the Australian Research Council (Grant DP160103942). The study has been supported by theTRY initiative on plant traits (http://www.try-db.org).en_AU
dc.identifier.issn0014-3820en_AU
dc.identifier.urihttp://hdl.handle.net/1885/240629
dc.provenancehttps://v2.sherpa.ac.uk/id/publication/6866..."Author accepted manuscript can be made open access on non-commercial institutional repository after 12 month embargo" from SHERPA/RoMEO site (as at 16.7.2021).en_AU
dc.publisherSociety for the Study of Evolutionen_AU
dc.relationhttp://purl.org/au-research/grants/arc/DP160103942en_AU
dc.rights© 2019 The Author(s) and The Society for the Study of Evolution.en_AU
dc.sourceEvolutionen_AU
dc.subjectAdaptive radiationen_AU
dc.subjectbiodiversity hotspoten_AU
dc.subjectdiversificationen_AU
dc.subjectproteaceaeen_AU
dc.subjectslowdownen_AU
dc.subjecttrait evolutionen_AU
dc.titleEquilibrium and non-equilibrium phases in the radiation of Hakea and the drivers of diversity in Mediterranean-type ecosystemsen_AU
dc.typeJournal articleen_AU
dcterms.accessRightsOpen Accessen_AU
dcterms.dateAccepted2019-04-29
local.bibliographicCitation.issue7en_AU
local.bibliographicCitation.lastpage1410en_AU
local.bibliographicCitation.startpage1392en_AU
local.contributor.affiliationSkeels, Alexander, College of Science, ANUen_AU
local.contributor.affiliationCardillo, Marcel, College of Science, ANUen_AU
local.contributor.authoremailu4673846@anu.edu.auen_AU
local.contributor.authoruidSkeels, Alexander, u4673846en_AU
local.contributor.authoruidCardillo, Marcel, u4578670en_AU
local.description.notesAdded manually as didn't import from ARIESen_AU
local.identifier.absfor310410en_AU
local.identifier.absfor310402en_AU
local.identifier.absfor310412en_AU
local.identifier.ariespublicationu9511635xPUB1942en_AU
local.identifier.citationvolume73en_AU
local.identifier.doi10.1111/evo.13769en_AU
local.identifier.uidSubmittedByu5031974en_AU
local.publisher.urlhttps://onlinelibrary.wiley.com/en_AU
local.type.statusAccepted Versionen_AU

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