The effects of temperature and salinity on Acacia harpophylla (brigalow) (Mimosaceae) germination

S Reichman, Sean Bellairs, D MULLIGAN

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    Acacia harpophylla F. Muell. (brigalow) used to naturally occur over a range of about 50 000 km2 in Queensland and New South Wales, Australia. Large scale clearing for agriculture has reduced the area to less than 20 000 km2 and it is estimated that 20-25% of vertebrate fauna living in brigalow communities will become locally extinct as a result of the current clearing induced loss of habitat. Some coal mining companies in central Queensland have become interested in providing habitat for the endangered bridle nail-tailed wallaby that lives in brigalow vegetation. However, there is little known about establishment techniques for brigalow on mine sites and other disturbed ground; an understanding of brigalow biology and ecology is required to assist in the conservation of this threatened vegetation community and for re-creation of bridled nail-tail wallaby habitat in the post mining landscape. Brigalow is an unusual species of Acacia because it is not hard-seeded and germinates readily without the need to break seed-coat imposed dormancy. Germination trials were undertaken to test the ability of brigalow seed to germinate with a range of temperatures and salinity levels similar to those experienced in coal mine spoil. Optimum germination was found to occur at temperatures from 15 to 38�C and no germination was recorded at 45�C. Brigalow was very tolerant of high salt levels and germinated at percentages greater than 50% up to the highest salinity tested, 30 dS/m. Germination of greater than 90% occurred up to an electrical conductivity of 20 dS/m. The results indicate brigalow seed can be sown in summer when rains are most likely to occur, however, shading of the seed with extra soil or mulch may ensure the ground surface does not become too hot for germination. Because of its ability to germinate at high salinity levels, brigalow may be suitable for use in saline mine wastes which are common on sites to be rehabilitated after mining. � The Rangeland Society.
    Original languageEnglish
    Pages (from-to)175-178
    Number of pages4
    JournalRangeland Journal
    Volume28
    Issue number2
    Publication statusPublished - 2006

    Fingerprint

    Acacia harpophylla
    Fabaceae
    germination
    salinity
    seed
    temperature
    coal
    Queensland
    habitat
    bridles
    seeds
    nails (equipment)
    mine spoil
    vegetation
    mine waste
    Macropodidae
    mulch
    dormancy
    Acacia
    shading

    Cite this

    @article{98801be79b8c4050a47f790c49cd1571,
    title = "The effects of temperature and salinity on Acacia harpophylla (brigalow) (Mimosaceae) germination",
    abstract = "Acacia harpophylla F. Muell. (brigalow) used to naturally occur over a range of about 50 000 km2 in Queensland and New South Wales, Australia. Large scale clearing for agriculture has reduced the area to less than 20 000 km2 and it is estimated that 20-25{\%} of vertebrate fauna living in brigalow communities will become locally extinct as a result of the current clearing induced loss of habitat. Some coal mining companies in central Queensland have become interested in providing habitat for the endangered bridle nail-tailed wallaby that lives in brigalow vegetation. However, there is little known about establishment techniques for brigalow on mine sites and other disturbed ground; an understanding of brigalow biology and ecology is required to assist in the conservation of this threatened vegetation community and for re-creation of bridled nail-tail wallaby habitat in the post mining landscape. Brigalow is an unusual species of Acacia because it is not hard-seeded and germinates readily without the need to break seed-coat imposed dormancy. Germination trials were undertaken to test the ability of brigalow seed to germinate with a range of temperatures and salinity levels similar to those experienced in coal mine spoil. Optimum germination was found to occur at temperatures from 15 to 38�C and no germination was recorded at 45�C. Brigalow was very tolerant of high salt levels and germinated at percentages greater than 50{\%} up to the highest salinity tested, 30 dS/m. Germination of greater than 90{\%} occurred up to an electrical conductivity of 20 dS/m. The results indicate brigalow seed can be sown in summer when rains are most likely to occur, however, shading of the seed with extra soil or mulch may ensure the ground surface does not become too hot for germination. Because of its ability to germinate at high salinity levels, brigalow may be suitable for use in saline mine wastes which are common on sites to be rehabilitated after mining. � The Rangeland Society.",
    keywords = "Acacia, Acacia harpophylla, Fabaceae, Onychogalea, Vertebrata",
    author = "S Reichman and Sean Bellairs and D MULLIGAN",
    year = "2006",
    language = "English",
    volume = "28",
    pages = "175--178",
    journal = "The Rangeland Journal",
    issn = "1036-9872",
    publisher = "CSIRO Publishing",
    number = "2",

    }

    The effects of temperature and salinity on Acacia harpophylla (brigalow) (Mimosaceae) germination. / Reichman, S; Bellairs, Sean; MULLIGAN, D.

    In: Rangeland Journal, Vol. 28, No. 2, 2006, p. 175-178.

    Research output: Contribution to journalArticleResearchpeer-review

    TY - JOUR

    T1 - The effects of temperature and salinity on Acacia harpophylla (brigalow) (Mimosaceae) germination

    AU - Reichman, S

    AU - Bellairs, Sean

    AU - MULLIGAN, D

    PY - 2006

    Y1 - 2006

    N2 - Acacia harpophylla F. Muell. (brigalow) used to naturally occur over a range of about 50 000 km2 in Queensland and New South Wales, Australia. Large scale clearing for agriculture has reduced the area to less than 20 000 km2 and it is estimated that 20-25% of vertebrate fauna living in brigalow communities will become locally extinct as a result of the current clearing induced loss of habitat. Some coal mining companies in central Queensland have become interested in providing habitat for the endangered bridle nail-tailed wallaby that lives in brigalow vegetation. However, there is little known about establishment techniques for brigalow on mine sites and other disturbed ground; an understanding of brigalow biology and ecology is required to assist in the conservation of this threatened vegetation community and for re-creation of bridled nail-tail wallaby habitat in the post mining landscape. Brigalow is an unusual species of Acacia because it is not hard-seeded and germinates readily without the need to break seed-coat imposed dormancy. Germination trials were undertaken to test the ability of brigalow seed to germinate with a range of temperatures and salinity levels similar to those experienced in coal mine spoil. Optimum germination was found to occur at temperatures from 15 to 38�C and no germination was recorded at 45�C. Brigalow was very tolerant of high salt levels and germinated at percentages greater than 50% up to the highest salinity tested, 30 dS/m. Germination of greater than 90% occurred up to an electrical conductivity of 20 dS/m. The results indicate brigalow seed can be sown in summer when rains are most likely to occur, however, shading of the seed with extra soil or mulch may ensure the ground surface does not become too hot for germination. Because of its ability to germinate at high salinity levels, brigalow may be suitable for use in saline mine wastes which are common on sites to be rehabilitated after mining. � The Rangeland Society.

    AB - Acacia harpophylla F. Muell. (brigalow) used to naturally occur over a range of about 50 000 km2 in Queensland and New South Wales, Australia. Large scale clearing for agriculture has reduced the area to less than 20 000 km2 and it is estimated that 20-25% of vertebrate fauna living in brigalow communities will become locally extinct as a result of the current clearing induced loss of habitat. Some coal mining companies in central Queensland have become interested in providing habitat for the endangered bridle nail-tailed wallaby that lives in brigalow vegetation. However, there is little known about establishment techniques for brigalow on mine sites and other disturbed ground; an understanding of brigalow biology and ecology is required to assist in the conservation of this threatened vegetation community and for re-creation of bridled nail-tail wallaby habitat in the post mining landscape. Brigalow is an unusual species of Acacia because it is not hard-seeded and germinates readily without the need to break seed-coat imposed dormancy. Germination trials were undertaken to test the ability of brigalow seed to germinate with a range of temperatures and salinity levels similar to those experienced in coal mine spoil. Optimum germination was found to occur at temperatures from 15 to 38�C and no germination was recorded at 45�C. Brigalow was very tolerant of high salt levels and germinated at percentages greater than 50% up to the highest salinity tested, 30 dS/m. Germination of greater than 90% occurred up to an electrical conductivity of 20 dS/m. The results indicate brigalow seed can be sown in summer when rains are most likely to occur, however, shading of the seed with extra soil or mulch may ensure the ground surface does not become too hot for germination. Because of its ability to germinate at high salinity levels, brigalow may be suitable for use in saline mine wastes which are common on sites to be rehabilitated after mining. � The Rangeland Society.

    KW - Acacia

    KW - Acacia harpophylla

    KW - Fabaceae

    KW - Onychogalea

    KW - Vertebrata

    M3 - Article

    VL - 28

    SP - 175

    EP - 178

    JO - The Rangeland Journal

    JF - The Rangeland Journal

    SN - 1036-9872

    IS - 2

    ER -