Range-weighted metrics of species and phylogenetic turnover can better resolve biogeographic transition zones

Shawn Laffan, Dan Rosauer, Giovanni Di Virgilio, Joseph Miller, Carlos GONZALEZ-OROZCO, Nunzio Knerr, Andrew Thornhill, Brent Mishler

    Research output: Contribution to journalArticle

    15 Citations (Scopus)

    Abstract

    Understanding changes of biodiversity across the landscape underlies biogeography and ecology and is important in land management and conservation. Measures of species and phylogenetic turnover used to estimate the rate of change of assemblages between sets of locations are more often influenced by wide-ranging taxa. Transition zones between regions that are associated with range-restricted taxa can be obscured by wide-ranging taxa that span them. We present a set of new range-weighted metrics of taxon and phylogenetic turnover, as modifications of conventional metrics, where the range-restricted components of the assemblages are assigned greater weight in the calculations. We show how these metrics are derived from weighted endemism and phylogenetic endemism and demonstrate their properties using a continent-wide data set of Australian Acacia. The range-weighted metrics result in better delineated transition zones between regions, in that the rate of turnover is steeper than with conventional turnover measures. These metrics provide important complementary information for the interpretation of spatial turnover patterns derived from conventional turnover metrics. Additionally, the phylogenetic variant incorporates information about phylogenetic relatedness while also not saturating at high values of turnover, thus remaining useful for comparisons over greater distances than conventional turnover metrics.
    Original languageEnglish
    Pages (from-to)580-588
    Number of pages9
    JournalMethods in Ecology and Evolution
    Volume7
    Issue number5
    DOIs
    Publication statusPublished - 2016

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    transition zone
    turnover
    phylogenetics
    phylogeny
    land management
    indigenous species
    endemism
    Acacia
    biogeography
    biodiversity
    ecology
    relatedness

    Cite this

    Laffan, S., Rosauer, D., Di Virgilio, G., Miller, J., GONZALEZ-OROZCO, C., Knerr, N., ... Mishler, B. (2016). Range-weighted metrics of species and phylogenetic turnover can better resolve biogeographic transition zones. Methods in Ecology and Evolution, 7(5), 580-588. https://doi.org/10.1111/2041-210X.12513
    Laffan, Shawn ; Rosauer, Dan ; Di Virgilio, Giovanni ; Miller, Joseph ; GONZALEZ-OROZCO, Carlos ; Knerr, Nunzio ; Thornhill, Andrew ; Mishler, Brent. / Range-weighted metrics of species and phylogenetic turnover can better resolve biogeographic transition zones. In: Methods in Ecology and Evolution. 2016 ; Vol. 7, No. 5. pp. 580-588.
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    abstract = "Understanding changes of biodiversity across the landscape underlies biogeography and ecology and is important in land management and conservation. Measures of species and phylogenetic turnover used to estimate the rate of change of assemblages between sets of locations are more often influenced by wide-ranging taxa. Transition zones between regions that are associated with range-restricted taxa can be obscured by wide-ranging taxa that span them. We present a set of new range-weighted metrics of taxon and phylogenetic turnover, as modifications of conventional metrics, where the range-restricted components of the assemblages are assigned greater weight in the calculations. We show how these metrics are derived from weighted endemism and phylogenetic endemism and demonstrate their properties using a continent-wide data set of Australian Acacia. The range-weighted metrics result in better delineated transition zones between regions, in that the rate of turnover is steeper than with conventional turnover measures. These metrics provide important complementary information for the interpretation of spatial turnover patterns derived from conventional turnover metrics. Additionally, the phylogenetic variant incorporates information about phylogenetic relatedness while also not saturating at high values of turnover, thus remaining useful for comparisons over greater distances than conventional turnover metrics.",
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    Laffan, S, Rosauer, D, Di Virgilio, G, Miller, J, GONZALEZ-OROZCO, C, Knerr, N, Thornhill, A & Mishler, B 2016, 'Range-weighted metrics of species and phylogenetic turnover can better resolve biogeographic transition zones', Methods in Ecology and Evolution, vol. 7, no. 5, pp. 580-588. https://doi.org/10.1111/2041-210X.12513

    Range-weighted metrics of species and phylogenetic turnover can better resolve biogeographic transition zones. / Laffan, Shawn; Rosauer, Dan; Di Virgilio, Giovanni; Miller, Joseph; GONZALEZ-OROZCO, Carlos; Knerr, Nunzio; Thornhill, Andrew; Mishler, Brent.

    In: Methods in Ecology and Evolution, Vol. 7, No. 5, 2016, p. 580-588.

    Research output: Contribution to journalArticle

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    T1 - Range-weighted metrics of species and phylogenetic turnover can better resolve biogeographic transition zones

    AU - Laffan, Shawn

    AU - Rosauer, Dan

    AU - Di Virgilio, Giovanni

    AU - Miller, Joseph

    AU - GONZALEZ-OROZCO, Carlos

    AU - Knerr, Nunzio

    AU - Thornhill, Andrew

    AU - Mishler, Brent

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    AB - Understanding changes of biodiversity across the landscape underlies biogeography and ecology and is important in land management and conservation. Measures of species and phylogenetic turnover used to estimate the rate of change of assemblages between sets of locations are more often influenced by wide-ranging taxa. Transition zones between regions that are associated with range-restricted taxa can be obscured by wide-ranging taxa that span them. We present a set of new range-weighted metrics of taxon and phylogenetic turnover, as modifications of conventional metrics, where the range-restricted components of the assemblages are assigned greater weight in the calculations. We show how these metrics are derived from weighted endemism and phylogenetic endemism and demonstrate their properties using a continent-wide data set of Australian Acacia. The range-weighted metrics result in better delineated transition zones between regions, in that the rate of turnover is steeper than with conventional turnover measures. These metrics provide important complementary information for the interpretation of spatial turnover patterns derived from conventional turnover metrics. Additionally, the phylogenetic variant incorporates information about phylogenetic relatedness while also not saturating at high values of turnover, thus remaining useful for comparisons over greater distances than conventional turnover metrics.

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