Transport pathways shape the biogeography of alien freshwater fishes in Australia

Pablo García-Díaz, Adam Kerezsy, Peter J. Unmack, Mark Lintermans, Stephen J. Beatty, Gavin L. Butler, Rob Freeman, Michael P. Hammer, Scott Hardie, Mark J. Kennard, David L. Morgan, Bradley J. Pusey, Tarmo A. Raadik, Jason D. Thiem, Nick S. Whiterod, Phillip Cassey, Richard P. Duncan

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    Aim: Changing preferences regarding which species humans have transported to new regions can have major consequences for the potential distribution of alien taxa, but the mechanisms shaping these patterns are poorly understood. We assessed the extent to which changes in human preferences for transporting and introducing alien freshwater fishes have altered their biogeography. Location: Australia. Methods: We compiled an up-to-date database of alien freshwater fishes established in drainages in Australia before and after the number of established alien fish species doubled (pre-1970 and post-1970, respectively). Using metacommunity models, we analysed the influence of species traits and drainage features on the distribution of alien fishes that established pre- and post-1970. Results: Alien fishes in Australia were introduced via four main transport pathways: acclimatization, aquaculture, biocontrol and ornamental trade. The relative importance of each pathway changed substantially between the two periods, accompanied by changes in the distribution of alien fishes and the variables predicting their distribution. Pre-1970, most species (64%) were introduced by acclimatization societies for purposes such as angling and biocontrol, and these fish have established in inland drainages more heavily impacted by human activities. In contrast, most of the post-1970 introductions (69%) were ornamental fishes, with most species established in small, north-eastern, tropical and subtropical coastal drainages. Main conclusions: Substantial changes in introduction preferences and transport pathways over time have altered both the patterns and underlying processes shaping the biogeography of alien fishes in Australia. Our findings highlight the need for caution when using historical data to infer potential future distributions of alien species. The continuing spread of alien species means traditional biogeographical units may no longer be identifiable in the foreseeable future.

    Original languageEnglish
    Pages (from-to)1405-1415
    Number of pages11
    JournalDiversity and Distributions
    Volume24
    Issue number10
    DOIs
    Publication statusPublished - 1 Oct 2018

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    biogeography
    freshwater fish
    drainage
    fish
    acclimation
    biological control
    introduced species
    ornamental fish
    sport fishing
    aquaculture
    angling
    human activity
    distribution

    Cite this

    García-Díaz, Pablo ; Kerezsy, Adam ; Unmack, Peter J. ; Lintermans, Mark ; Beatty, Stephen J. ; Butler, Gavin L. ; Freeman, Rob ; Hammer, Michael P. ; Hardie, Scott ; Kennard, Mark J. ; Morgan, David L. ; Pusey, Bradley J. ; Raadik, Tarmo A. ; Thiem, Jason D. ; Whiterod, Nick S. ; Cassey, Phillip ; Duncan, Richard P. / Transport pathways shape the biogeography of alien freshwater fishes in Australia. In: Diversity and Distributions. 2018 ; Vol. 24, No. 10. pp. 1405-1415.
    @article{bdbde2cff55c4172a362beea005eedab,
    title = "Transport pathways shape the biogeography of alien freshwater fishes in Australia",
    abstract = "Aim: Changing preferences regarding which species humans have transported to new regions can have major consequences for the potential distribution of alien taxa, but the mechanisms shaping these patterns are poorly understood. We assessed the extent to which changes in human preferences for transporting and introducing alien freshwater fishes have altered their biogeography. Location: Australia. Methods: We compiled an up-to-date database of alien freshwater fishes established in drainages in Australia before and after the number of established alien fish species doubled (pre-1970 and post-1970, respectively). Using metacommunity models, we analysed the influence of species traits and drainage features on the distribution of alien fishes that established pre- and post-1970. Results: Alien fishes in Australia were introduced via four main transport pathways: acclimatization, aquaculture, biocontrol and ornamental trade. The relative importance of each pathway changed substantially between the two periods, accompanied by changes in the distribution of alien fishes and the variables predicting their distribution. Pre-1970, most species (64{\%}) were introduced by acclimatization societies for purposes such as angling and biocontrol, and these fish have established in inland drainages more heavily impacted by human activities. In contrast, most of the post-1970 introductions (69{\%}) were ornamental fishes, with most species established in small, north-eastern, tropical and subtropical coastal drainages. Main conclusions: Substantial changes in introduction preferences and transport pathways over time have altered both the patterns and underlying processes shaping the biogeography of alien fishes in Australia. Our findings highlight the need for caution when using historical data to infer potential future distributions of alien species. The continuing spread of alien species means traditional biogeographical units may no longer be identifiable in the foreseeable future.",
    keywords = "acclimatization, Australia, community alteration, human-induced environmental change, ornamental trade, species turnover",
    author = "Pablo Garc{\'i}a-D{\'i}az and Adam Kerezsy and Unmack, {Peter J.} and Mark Lintermans and Beatty, {Stephen J.} and Butler, {Gavin L.} and Rob Freeman and Hammer, {Michael P.} and Scott Hardie and Kennard, {Mark J.} and Morgan, {David L.} and Pusey, {Bradley J.} and Raadik, {Tarmo A.} and Thiem, {Jason D.} and Whiterod, {Nick S.} and Phillip Cassey and Duncan, {Richard P.}",
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    García-Díaz, P, Kerezsy, A, Unmack, PJ, Lintermans, M, Beatty, SJ, Butler, GL, Freeman, R, Hammer, MP, Hardie, S, Kennard, MJ, Morgan, DL, Pusey, BJ, Raadik, TA, Thiem, JD, Whiterod, NS, Cassey, P & Duncan, RP 2018, 'Transport pathways shape the biogeography of alien freshwater fishes in Australia', Diversity and Distributions, vol. 24, no. 10, pp. 1405-1415. https://doi.org/10.1111/ddi.12777

    Transport pathways shape the biogeography of alien freshwater fishes in Australia. / García-Díaz, Pablo; Kerezsy, Adam; Unmack, Peter J.; Lintermans, Mark; Beatty, Stephen J.; Butler, Gavin L.; Freeman, Rob; Hammer, Michael P.; Hardie, Scott; Kennard, Mark J.; Morgan, David L.; Pusey, Bradley J.; Raadik, Tarmo A.; Thiem, Jason D.; Whiterod, Nick S.; Cassey, Phillip; Duncan, Richard P.

    In: Diversity and Distributions, Vol. 24, No. 10, 01.10.2018, p. 1405-1415.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Transport pathways shape the biogeography of alien freshwater fishes in Australia

    AU - García-Díaz, Pablo

    AU - Kerezsy, Adam

    AU - Unmack, Peter J.

    AU - Lintermans, Mark

    AU - Beatty, Stephen J.

    AU - Butler, Gavin L.

    AU - Freeman, Rob

    AU - Hammer, Michael P.

    AU - Hardie, Scott

    AU - Kennard, Mark J.

    AU - Morgan, David L.

    AU - Pusey, Bradley J.

    AU - Raadik, Tarmo A.

    AU - Thiem, Jason D.

    AU - Whiterod, Nick S.

    AU - Cassey, Phillip

    AU - Duncan, Richard P.

    PY - 2018/10/1

    Y1 - 2018/10/1

    N2 - Aim: Changing preferences regarding which species humans have transported to new regions can have major consequences for the potential distribution of alien taxa, but the mechanisms shaping these patterns are poorly understood. We assessed the extent to which changes in human preferences for transporting and introducing alien freshwater fishes have altered their biogeography. Location: Australia. Methods: We compiled an up-to-date database of alien freshwater fishes established in drainages in Australia before and after the number of established alien fish species doubled (pre-1970 and post-1970, respectively). Using metacommunity models, we analysed the influence of species traits and drainage features on the distribution of alien fishes that established pre- and post-1970. Results: Alien fishes in Australia were introduced via four main transport pathways: acclimatization, aquaculture, biocontrol and ornamental trade. The relative importance of each pathway changed substantially between the two periods, accompanied by changes in the distribution of alien fishes and the variables predicting their distribution. Pre-1970, most species (64%) were introduced by acclimatization societies for purposes such as angling and biocontrol, and these fish have established in inland drainages more heavily impacted by human activities. In contrast, most of the post-1970 introductions (69%) were ornamental fishes, with most species established in small, north-eastern, tropical and subtropical coastal drainages. Main conclusions: Substantial changes in introduction preferences and transport pathways over time have altered both the patterns and underlying processes shaping the biogeography of alien fishes in Australia. Our findings highlight the need for caution when using historical data to infer potential future distributions of alien species. The continuing spread of alien species means traditional biogeographical units may no longer be identifiable in the foreseeable future.

    AB - Aim: Changing preferences regarding which species humans have transported to new regions can have major consequences for the potential distribution of alien taxa, but the mechanisms shaping these patterns are poorly understood. We assessed the extent to which changes in human preferences for transporting and introducing alien freshwater fishes have altered their biogeography. Location: Australia. Methods: We compiled an up-to-date database of alien freshwater fishes established in drainages in Australia before and after the number of established alien fish species doubled (pre-1970 and post-1970, respectively). Using metacommunity models, we analysed the influence of species traits and drainage features on the distribution of alien fishes that established pre- and post-1970. Results: Alien fishes in Australia were introduced via four main transport pathways: acclimatization, aquaculture, biocontrol and ornamental trade. The relative importance of each pathway changed substantially between the two periods, accompanied by changes in the distribution of alien fishes and the variables predicting their distribution. Pre-1970, most species (64%) were introduced by acclimatization societies for purposes such as angling and biocontrol, and these fish have established in inland drainages more heavily impacted by human activities. In contrast, most of the post-1970 introductions (69%) were ornamental fishes, with most species established in small, north-eastern, tropical and subtropical coastal drainages. Main conclusions: Substantial changes in introduction preferences and transport pathways over time have altered both the patterns and underlying processes shaping the biogeography of alien fishes in Australia. Our findings highlight the need for caution when using historical data to infer potential future distributions of alien species. The continuing spread of alien species means traditional biogeographical units may no longer be identifiable in the foreseeable future.

    KW - acclimatization

    KW - Australia

    KW - community alteration

    KW - human-induced environmental change

    KW - ornamental trade

    KW - species turnover

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    DO - 10.1111/ddi.12777

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    EP - 1415

    JO - Diversity and Distributions

    JF - Diversity and Distributions

    SN - 1366-9516

    IS - 10

    ER -