No difference in the competitive ability of introduced and native Trifolium provenances when grown with soil biota from their introduced and native ranges

Natasha Shelby, Philip Hulme, Wim van der Putten, Kevin Mcginn, Carolin Weser, Richard DUNCAN

    Research output: Contribution to journalArticle

    3 Citations (Scopus)

    Abstract

    The evolution of increased competitive ability (EICA) hypothesis could explain why some introduced plant species perform better outside their native ranges. The EICA hypothesis proposes that introduced plants escape specialist pathogens or herbivores leading to selection for resources to be reallocated away from defence and towards greater competitive ability. We tested the hypothesis that escape from soil-borne enemies has led to increased competitive ability in three non-agricultural Trifolium (Fabaceae) species native to Europe that were introduced to New Zealand in the 19th century. Trifolium performance is intimately tied to rhizosphere biota. Thus, we grew plants from one introduced (New Zealand) and two native (Spain and the UK) provenances for each of three species in pots inoculated with soilmicrobiota collected fromthe rhizosphere beneath conspecifics in the introduced and native ranges. Plants were grown singly and in competition with conspecifics from a different provenance in order to compare competitive ability in the presence of different microbial communities. In contrast to the predictions of the EICA hypothesis, we found no difference in the competitive ability of introduced and native provenances when grown with soil microbiota from either the native or introduced range. Although plants from introduced provenances of two species grew more slowly than native provenances in native-range soils, as predicted by the EICA hypothesis, plants from the introduced provenance were no less competitive than native conspecifics. Overall, the growth rate of plants grown singly was a poor predictor of their competitive ability, highlighting the importance of directly quantifying plant performance in competitive scenarios, rather than relying on surrogate measures such as growth rate.
    Original languageEnglish
    Pages (from-to)1-11
    Number of pages11
    JournalAOB Plants
    Volume8
    Issue number1
    DOIs
    Publication statusPublished - 2016

    Fingerprint

    Trifolium
    provenance
    rhizosphere
    Fabaceae
    microbial communities
    soil biota
    soil
    indigenous species
    herbivores
    Spain
    pathogens
    organisms

    Cite this

    Shelby, Natasha ; Hulme, Philip ; van der Putten, Wim ; Mcginn, Kevin ; Weser, Carolin ; DUNCAN, Richard. / No difference in the competitive ability of introduced and native Trifolium provenances when grown with soil biota from their introduced and native ranges. In: AOB Plants. 2016 ; Vol. 8, No. 1. pp. 1-11.
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    title = "No difference in the competitive ability of introduced and native Trifolium provenances when grown with soil biota from their introduced and native ranges",
    abstract = "The evolution of increased competitive ability (EICA) hypothesis could explain why some introduced plant species perform better outside their native ranges. The EICA hypothesis proposes that introduced plants escape specialist pathogens or herbivores leading to selection for resources to be reallocated away from defence and towards greater competitive ability. We tested the hypothesis that escape from soil-borne enemies has led to increased competitive ability in three non-agricultural Trifolium (Fabaceae) species native to Europe that were introduced to New Zealand in the 19th century. Trifolium performance is intimately tied to rhizosphere biota. Thus, we grew plants from one introduced (New Zealand) and two native (Spain and the UK) provenances for each of three species in pots inoculated with soilmicrobiota collected fromthe rhizosphere beneath conspecifics in the introduced and native ranges. Plants were grown singly and in competition with conspecifics from a different provenance in order to compare competitive ability in the presence of different microbial communities. In contrast to the predictions of the EICA hypothesis, we found no difference in the competitive ability of introduced and native provenances when grown with soil microbiota from either the native or introduced range. Although plants from introduced provenances of two species grew more slowly than native provenances in native-range soils, as predicted by the EICA hypothesis, plants from the introduced provenance were no less competitive than native conspecifics. Overall, the growth rate of plants grown singly was a poor predictor of their competitive ability, highlighting the importance of directly quantifying plant performance in competitive scenarios, rather than relying on surrogate measures such as growth rate.",
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    author = "Natasha Shelby and Philip Hulme and {van der Putten}, Wim and Kevin Mcginn and Carolin Weser and Richard DUNCAN",
    year = "2016",
    doi = "10.1093/aobpla/plw016",
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    No difference in the competitive ability of introduced and native Trifolium provenances when grown with soil biota from their introduced and native ranges. / Shelby, Natasha; Hulme, Philip; van der Putten, Wim; Mcginn, Kevin; Weser, Carolin; DUNCAN, Richard.

    In: AOB Plants, Vol. 8, No. 1, 2016, p. 1-11.

    Research output: Contribution to journalArticle

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    T1 - No difference in the competitive ability of introduced and native Trifolium provenances when grown with soil biota from their introduced and native ranges

    AU - Shelby, Natasha

    AU - Hulme, Philip

    AU - van der Putten, Wim

    AU - Mcginn, Kevin

    AU - Weser, Carolin

    AU - DUNCAN, Richard

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    N2 - The evolution of increased competitive ability (EICA) hypothesis could explain why some introduced plant species perform better outside their native ranges. The EICA hypothesis proposes that introduced plants escape specialist pathogens or herbivores leading to selection for resources to be reallocated away from defence and towards greater competitive ability. We tested the hypothesis that escape from soil-borne enemies has led to increased competitive ability in three non-agricultural Trifolium (Fabaceae) species native to Europe that were introduced to New Zealand in the 19th century. Trifolium performance is intimately tied to rhizosphere biota. Thus, we grew plants from one introduced (New Zealand) and two native (Spain and the UK) provenances for each of three species in pots inoculated with soilmicrobiota collected fromthe rhizosphere beneath conspecifics in the introduced and native ranges. Plants were grown singly and in competition with conspecifics from a different provenance in order to compare competitive ability in the presence of different microbial communities. In contrast to the predictions of the EICA hypothesis, we found no difference in the competitive ability of introduced and native provenances when grown with soil microbiota from either the native or introduced range. Although plants from introduced provenances of two species grew more slowly than native provenances in native-range soils, as predicted by the EICA hypothesis, plants from the introduced provenance were no less competitive than native conspecifics. Overall, the growth rate of plants grown singly was a poor predictor of their competitive ability, highlighting the importance of directly quantifying plant performance in competitive scenarios, rather than relying on surrogate measures such as growth rate.

    AB - The evolution of increased competitive ability (EICA) hypothesis could explain why some introduced plant species perform better outside their native ranges. The EICA hypothesis proposes that introduced plants escape specialist pathogens or herbivores leading to selection for resources to be reallocated away from defence and towards greater competitive ability. We tested the hypothesis that escape from soil-borne enemies has led to increased competitive ability in three non-agricultural Trifolium (Fabaceae) species native to Europe that were introduced to New Zealand in the 19th century. Trifolium performance is intimately tied to rhizosphere biota. Thus, we grew plants from one introduced (New Zealand) and two native (Spain and the UK) provenances for each of three species in pots inoculated with soilmicrobiota collected fromthe rhizosphere beneath conspecifics in the introduced and native ranges. Plants were grown singly and in competition with conspecifics from a different provenance in order to compare competitive ability in the presence of different microbial communities. In contrast to the predictions of the EICA hypothesis, we found no difference in the competitive ability of introduced and native provenances when grown with soil microbiota from either the native or introduced range. Although plants from introduced provenances of two species grew more slowly than native provenances in native-range soils, as predicted by the EICA hypothesis, plants from the introduced provenance were no less competitive than native conspecifics. Overall, the growth rate of plants grown singly was a poor predictor of their competitive ability, highlighting the importance of directly quantifying plant performance in competitive scenarios, rather than relying on surrogate measures such as growth rate.

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    KW - enemy-release

    KW - exotic

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    KW - soil biota

    KW - weed.

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