Management of the Invasive Hill Raspberry (Rubus niveus) on Santiago Island,Galapagos

Eradication or Indefinite Control?

Jorge Renteria, Mark Gardener, F Panetta, Mick Crawley

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    The eradication of an invasive plant species can provide substantial ecological and economic benefits by eliminating completely the negative effects of the weed and reducing the high cost of continuing control. A 5-yr program toward the eradication of hill raspberry (Rubus niveus Thunb.) in Santiago Island is evaluated using delimitation and extirpation criteria, as well as assessment of the ecological community response to management techniques. Currently, hill raspberry is located in the humid zone of Santiago island. It is distributed over three main infestations, small patches, and many scattered individuals within an area of approximately 1,000 ha. New infestations are constantly being found; every year, new detections add an area of approximately 175 ha. Adult and juvenile individuals are still found, both beyond and within known infestations. Both plant and seed bank density of hill raspberry decreased over time where infestations were controlled. Species composition in the seed bank and existing vegetation were significantly different between areas under intensive control and adjacent uninvaded forest. After 5 yr of intensive management, delimitation of hill raspberry has not been achieved; new populations are found every year, increasing the infested area that requires management. Off-target effects on native species resulting from control efforts seem to be substantial. Although a vast increase in economic investment would allow intensive searching that might enable all individuals to be found and controlled, the resultant disturbance and off-targets effects could outweigh the conservation benefits of eradication. Nomenclature: Hill raspberry, Rubus niveus Thunb.
    Original languageEnglish
    Pages (from-to)37-46
    Number of pages10
    JournalInvasive Plant Science and Management
    Volume5
    Issue number1
    DOIs
    Publication statusPublished - Mar 2012

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    Rubus niveus
    Galapagos Islands
    raspberries
    economic investment
    humid zones
    indigenous species
    weeds
    species diversity
    economics
    vegetation

    Cite this

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    title = "Management of the Invasive Hill Raspberry (Rubus niveus) on Santiago Island,Galapagos: Eradication or Indefinite Control?",
    abstract = "The eradication of an invasive plant species can provide substantial ecological and economic benefits by eliminating completely the negative effects of the weed and reducing the high cost of continuing control. A 5-yr program toward the eradication of hill raspberry (Rubus niveus Thunb.) in Santiago Island is evaluated using delimitation and extirpation criteria, as well as assessment of the ecological community response to management techniques. Currently, hill raspberry is located in the humid zone of Santiago island. It is distributed over three main infestations, small patches, and many scattered individuals within an area of approximately 1,000 ha. New infestations are constantly being found; every year, new detections add an area of approximately 175 ha. Adult and juvenile individuals are still found, both beyond and within known infestations. Both plant and seed bank density of hill raspberry decreased over time where infestations were controlled. Species composition in the seed bank and existing vegetation were significantly different between areas under intensive control and adjacent uninvaded forest. After 5 yr of intensive management, delimitation of hill raspberry has not been achieved; new populations are found every year, increasing the infested area that requires management. Off-target effects on native species resulting from control efforts seem to be substantial. Although a vast increase in economic investment would allow intensive searching that might enable all individuals to be found and controlled, the resultant disturbance and off-targets effects could outweigh the conservation benefits of eradication. Nomenclature: Hill raspberry, Rubus niveus Thunb.",
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    Management of the Invasive Hill Raspberry (Rubus niveus) on Santiago Island,Galapagos : Eradication or Indefinite Control? / Renteria, Jorge; Gardener, Mark; Panetta, F; Crawley, Mick.

    In: Invasive Plant Science and Management, Vol. 5, No. 1, 03.2012, p. 37-46.

    Research output: Contribution to journalArticleResearchpeer-review

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    T1 - Management of the Invasive Hill Raspberry (Rubus niveus) on Santiago Island,Galapagos

    T2 - Eradication or Indefinite Control?

    AU - Renteria, Jorge

    AU - Gardener, Mark

    AU - Panetta, F

    AU - Crawley, Mick

    PY - 2012/3

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    AB - The eradication of an invasive plant species can provide substantial ecological and economic benefits by eliminating completely the negative effects of the weed and reducing the high cost of continuing control. A 5-yr program toward the eradication of hill raspberry (Rubus niveus Thunb.) in Santiago Island is evaluated using delimitation and extirpation criteria, as well as assessment of the ecological community response to management techniques. Currently, hill raspberry is located in the humid zone of Santiago island. It is distributed over three main infestations, small patches, and many scattered individuals within an area of approximately 1,000 ha. New infestations are constantly being found; every year, new detections add an area of approximately 175 ha. Adult and juvenile individuals are still found, both beyond and within known infestations. Both plant and seed bank density of hill raspberry decreased over time where infestations were controlled. Species composition in the seed bank and existing vegetation were significantly different between areas under intensive control and adjacent uninvaded forest. After 5 yr of intensive management, delimitation of hill raspberry has not been achieved; new populations are found every year, increasing the infested area that requires management. Off-target effects on native species resulting from control efforts seem to be substantial. Although a vast increase in economic investment would allow intensive searching that might enable all individuals to be found and controlled, the resultant disturbance and off-targets effects could outweigh the conservation benefits of eradication. Nomenclature: Hill raspberry, Rubus niveus Thunb.

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    KW - Rubus glaucus

    KW - Rubus niveus

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    JO - Invasive Plant Science and Management

    JF - Invasive Plant Science and Management

    SN - 1939-7291

    IS - 1

    ER -