Effects of understory cover on tree recruitment in gold mining rehabilitation in monsoonal woodlands in Northern Territory Australia

Evi Warintan Saragih, Sean Bellairs, Penelope Wurm

    Research output: Chapter in Book/Report/Conference proceedingChapter

    Abstract

    Gold mining is one of the principal industries in the Northern Territory of Australia. Most of the mining occurs in monsoonal savanna woodland dominated by Eucalyptus and Acacia species with a grass understory. After mining, rehabilitation includes broadcasting a seed mix of Eucalyptus, Acacia and other tree species. Subsequent to initial establishment, continuing recruitment is important to ensure the rehabilitated vegetation community is sustainable. This study assessed relationships between tree recruitment and environmental parameters in gold mine rehabilitation areas. Tree density, sapling density, tree seedling density, grass biomass and soil cover were measured across 14 rehabilitation sites and 7 analogue sites. In natural woodland average sapling and seedling densities were two times greater than in mine rehabilitation areas. In general ground cover, tree density and the presence of cattle grazing are weakly correlated to tree recruitment. It suggested that after more than 10 years of rehabilitation, tree recruitment in mine rehabilitation is common but is yet to develop to recruitment levels observed in mature woodland. Tree recruitment monitoring is important to ensure vegetation sustainability in mine rehabilitation and is a useful tool to guide land management.
    Original languageEnglish
    Title of host publicationLegislation, Technology and Practice of Mine Land Reclamation
    Subtitle of host publicationProceedings of the Beijing International Symposium on Land Reclamation and Ecological Restoration (LRER 2014), Beijing, China, 16-19 October 2014
    EditorsZhenqi Hu
    Place of PublicationLondon
    PublisherCRC Press
    Pages189-198
    Number of pages10
    ISBN (Print)978-1-138-02724-4
    Publication statusPublished - 2015

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