Understanding the factors that influence seedling establishment to improve the success of threatened species translocations in the Mediterranean-climate region of southwest Australia

Christine Allen

    Research output: ThesisDoctoral Thesis

    Abstract

    [Truncated] Translocations have become a common management tool across the globe to establish or augment populations of threatened plant species to reduce the risk of extinction. Translocations often involve germinating seed ex-situ and planting seedlings into a specified site. As the translocation process is relatively costly and there is often limited seed availability, it is important to maximise seedling survival to increase the chances of establishing a self-sustaining population. Manipulating abiotic and biotic variables at a translocation site is one strategy used to improve seedling survival and further understand the ecology of threatened species. Southwest Australia is one of 34 global biodiversity hotspots with a high proportion of threatened plant species. Consequently, translocations have been implemented in this region by the Department of Parks and Wildlife over the last 20 years with varied degrees of success. My research focused on the Acacia and Banksia genera to build on the knowledge gained through past translocations and tests some novel ideas to explore the questions: (1) Is it possible to manipulate microhabitat “safe site” variables and plant seedlings with particular characteristics that together improve their growth and survival in a Mediterranean-climate? (2) Do plant physiological responses and microhabitat measurements help to explain seedling survival and growth? (3) Can we use data on natural seedling establishment and physiological responses to guide conservation of threatened species in a drying climate? My thesis incorporates research from both natural and translocation settings at three spatial scales.
    LanguageEnglish
    QualificationDoctor of Philosophy
    StateUnpublished - 2014

    Fingerprint

    seedling establishment
    translocation
    seedling
    physiological response
    microhabitat
    seed
    Mediterranean climate
    extinction
    biodiversity
    ecology
    climate

    Cite this

    @phdthesis{4470e1d6819345a6a47ceb94b69477fe,
    title = "Understanding the factors that influence seedling establishment to improve the success of threatened species translocations in the Mediterranean-climate region of southwest Australia",
    abstract = "[Truncated] Translocations have become a common management tool across the globe to establish or augment populations of threatened plant species to reduce the risk of extinction. Translocations often involve germinating seed ex-situ and planting seedlings into a specified site. As the translocation process is relatively costly and there is often limited seed availability, it is important to maximise seedling survival to increase the chances of establishing a self-sustaining population. Manipulating abiotic and biotic variables at a translocation site is one strategy used to improve seedling survival and further understand the ecology of threatened species. Southwest Australia is one of 34 global biodiversity hotspots with a high proportion of threatened plant species. Consequently, translocations have been implemented in this region by the Department of Parks and Wildlife over the last 20 years with varied degrees of success. My research focused on the Acacia and Banksia genera to build on the knowledge gained through past translocations and tests some novel ideas to explore the questions: (1) Is it possible to manipulate microhabitat “safe site” variables and plant seedlings with particular characteristics that together improve their growth and survival in a Mediterranean-climate? (2) Do plant physiological responses and microhabitat measurements help to explain seedling survival and growth? (3) Can we use data on natural seedling establishment and physiological responses to guide conservation of threatened species in a drying climate? My thesis incorporates research from both natural and translocation settings at three spatial scales.",
    keywords = "Threatened plants, Translocations, Southwest Australia, Acacia, Banksia, Microhabitat, Seedling establishment, Conservation",
    author = "Christine Allen",
    year = "2014",
    language = "English",

    }

    TY - THES

    T1 - Understanding the factors that influence seedling establishment to improve the success of threatened species translocations in the Mediterranean-climate region of southwest Australia

    AU - Allen,Christine

    PY - 2014

    Y1 - 2014

    N2 - [Truncated] Translocations have become a common management tool across the globe to establish or augment populations of threatened plant species to reduce the risk of extinction. Translocations often involve germinating seed ex-situ and planting seedlings into a specified site. As the translocation process is relatively costly and there is often limited seed availability, it is important to maximise seedling survival to increase the chances of establishing a self-sustaining population. Manipulating abiotic and biotic variables at a translocation site is one strategy used to improve seedling survival and further understand the ecology of threatened species. Southwest Australia is one of 34 global biodiversity hotspots with a high proportion of threatened plant species. Consequently, translocations have been implemented in this region by the Department of Parks and Wildlife over the last 20 years with varied degrees of success. My research focused on the Acacia and Banksia genera to build on the knowledge gained through past translocations and tests some novel ideas to explore the questions: (1) Is it possible to manipulate microhabitat “safe site” variables and plant seedlings with particular characteristics that together improve their growth and survival in a Mediterranean-climate? (2) Do plant physiological responses and microhabitat measurements help to explain seedling survival and growth? (3) Can we use data on natural seedling establishment and physiological responses to guide conservation of threatened species in a drying climate? My thesis incorporates research from both natural and translocation settings at three spatial scales.

    AB - [Truncated] Translocations have become a common management tool across the globe to establish or augment populations of threatened plant species to reduce the risk of extinction. Translocations often involve germinating seed ex-situ and planting seedlings into a specified site. As the translocation process is relatively costly and there is often limited seed availability, it is important to maximise seedling survival to increase the chances of establishing a self-sustaining population. Manipulating abiotic and biotic variables at a translocation site is one strategy used to improve seedling survival and further understand the ecology of threatened species. Southwest Australia is one of 34 global biodiversity hotspots with a high proportion of threatened plant species. Consequently, translocations have been implemented in this region by the Department of Parks and Wildlife over the last 20 years with varied degrees of success. My research focused on the Acacia and Banksia genera to build on the knowledge gained through past translocations and tests some novel ideas to explore the questions: (1) Is it possible to manipulate microhabitat “safe site” variables and plant seedlings with particular characteristics that together improve their growth and survival in a Mediterranean-climate? (2) Do plant physiological responses and microhabitat measurements help to explain seedling survival and growth? (3) Can we use data on natural seedling establishment and physiological responses to guide conservation of threatened species in a drying climate? My thesis incorporates research from both natural and translocation settings at three spatial scales.

    KW - Threatened plants

    KW - Translocations

    KW - Southwest Australia

    KW - Acacia

    KW - Banksia

    KW - Microhabitat

    KW - Seedling establishment

    KW - Conservation

    M3 - Doctoral Thesis

    ER -