Extrinsic and intrinsic controls on the distribution of the critically endangered cress, Ischnocarpus exilis (Brassicaceae)

A.L. Miller, R.P. Duncan

    Research output: Contribution to journalArticle

    9 Citations (Scopus)

    Abstract

    Ischnocarpus exilis, a critically endangered cress, persists in one small population in a 1m2 section of a limestone tower in the South Island, New Zealand. The importance of intrinsic (seed production, dispersal ability and habitat specificity) and extrinsic factors (weed competition) acting to restrict the distribution of this threatened species were investigated with a field experiment, demographic monitoring and soil seed bank analysis. I. exilis is not confined to its present site because of high habitat specificity, but rather is limited by low seed production and limited dispersal as well as by competition with invasive weeds. Conservation management of this critically endangered species should focus on controlling weeds and on establishing new populations in suitable weed-free habitat. © 2002 Elsevier Science Ltd. All rights reserved.
    Original languageEnglish
    Pages (from-to)153-160
    Number of pages8
    JournalBiological Conservation
    Volume110
    Issue number1
    DOIs
    Publication statusPublished - 2003

    Fingerprint

    Brassicaceae
    seed productivity
    weed
    weeds
    seed production
    habitats
    crop-weed competition
    habitat
    buried seeds
    threatened species
    limestone
    endangered species
    conservation management
    seed bank
    demographic statistics
    monitoring
    distribution
    soil

    Cite this

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    abstract = "Ischnocarpus exilis, a critically endangered cress, persists in one small population in a 1m2 section of a limestone tower in the South Island, New Zealand. The importance of intrinsic (seed production, dispersal ability and habitat specificity) and extrinsic factors (weed competition) acting to restrict the distribution of this threatened species were investigated with a field experiment, demographic monitoring and soil seed bank analysis. I. exilis is not confined to its present site because of high habitat specificity, but rather is limited by low seed production and limited dispersal as well as by competition with invasive weeds. Conservation management of this critically endangered species should focus on controlling weeds and on establishing new populations in suitable weed-free habitat. {\circledC} 2002 Elsevier Science Ltd. All rights reserved.",
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    Extrinsic and intrinsic controls on the distribution of the critically endangered cress, Ischnocarpus exilis (Brassicaceae). / Miller, A.L.; Duncan, R.P.

    In: Biological Conservation, Vol. 110, No. 1, 2003, p. 153-160.

    Research output: Contribution to journalArticle

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