Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Hakea, the world's most sclerophyllous genus, arose in southwestern Australian heathland and diversified throughout Australia over the past 12million years

    Access Status
    Fulltext not available
    Authors
    Lamont, Byron
    He, Tianhua
    Lim, Sim Lin
    Date
    2016
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Lamont, B. and He, T. and Lim, S.L. 2016. Hakea, the world's most sclerophyllous genus, arose in southwestern Australian heathland and diversified throughout Australia over the past 12million years. Australian Journal of Botany. 64 (1): pp. 77-88.
    Source Title
    Australian Journal of Botany
    DOI
    10.1071/BT15134
    ISSN
    0067-1924
    Faculty
    Faculty of Science and Engineering
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/DP130103029
    URI
    http://hdl.handle.net/20.500.11937/36987
    Collection
    • Curtin Research Publications
    Abstract

    Hakea (Proteaceae) currently comprises over 150 species, with two-thirds confined to south-Western Australia (SWA) and the remainder spread throughout Australia, especially along the eastern coast. We constructed a time-based molecular phylogeny for the genus and used area-assignment techniques to trace its biogeographic history. According to our area-cladogram analysis, there is a 95% probability that Hakea arose 18million years ago (Ma) in the sandplains of SWA. From 12 Ma, the genus speciated and migrated into forest and onto granite outcrops within SWA, into the drier centre and then continued to the maritime forests of eastern Australia (EA) 3000km away, and north-east to savanna grasslands. The Nullarbor Plain was an obstacle but it did not prevent eastward migration. Twelve westeast, apparently allopatric, speciation events are identified that coincided with glacial maxima, but more likely represent sympatric speciation in SWA or central Australia, followed by further migration and speciationextinctionspeciation events across central to EA. During the period from 8 to 1 Ma, net speciation has been linear and strong in the sclerophyll shrublands of SWA and, to a lesser extent, the sclerophyll forests of EA. Four lines of evidence (historical distribution of sclerophyllous Proteaceae, historical subjection to aridity, species diversification patterns, relative allocation of drought-adapted traits) support our area-cladogram results that Hakea originated in SWA and gradually spread to all parts of Australia as suitable nutrient-impoverished, and open drought-and fire-prone habitats became available.

    Related items

    Showing items related by title, author, creator and subject.

    • Ecology and ecophysiology of southwestern Australian hakea species with contrasting leaf morphology and life forms.
      Groom, Philip K. (1996)
      Members of the genus Hakea (Proteaceae) are sclerophyllous, evergreen perennial shrubs or small trees endemic to Australia, with 65% of species confined to the South-West Botanical Province (southwestern Australia). ...
    • Evolutionary history of fire-stimulated resprouting, flowering, seed release and germination
      Lamont, Byron; He, Tianhua; Yan, Z. (2018)
      Fire has shaped the evolution of many plant traits in fire-prone environments: fire-resistant tissues with heat-insulated meristems, post-fire resprouting or fire-killed but regenerating from stored seeds, fire-stimulated ...
    • Mediterranean Biomes: Evolution of Their Vegetation, Floras, and Climate
      Rundel, P.; Arroyo, M.; Cowling, R.; Keeley, J.; Lamont, Byron; Vargas, P. (2016)
      Mediterranean-type ecosystems (MTEs) are located today in southwestern Australia, the Cape Region of South Africa, the Mediterranean Basin, California, and central Chile. These MTEs possess the highest levels of plant ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.