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  • Ecophysiological and foliar nitrogen concentration responses of understorey Acacia spp. and Eucalyptus sp. to prescribed burning

    Author(s)
    Ma, Ling
    Rao, Xingquan
    Lu, Ping
    Bai, Shahla Hosseini
    Xu, Zhihong
    Chen, Xiaoyang
    Blumfield, Timothy
    Xie, Jun
    Griffith University Author(s)
    Xu, Zhihong
    Blumfield, Tim J.
    Hosseini-Bai, Shahla
    Year published
    2015
    Metadata
    Show full item record
    Abstract
    Eucalyptus spp. is a dominant tree genus in Australia and most Eucalyptus spp. are canopy dominant species. In Australian natural forests, Eucalyptus spp. commonly are associated with understorey legumes which play a crucial role for ecological restoration owing to their nitrogen (N) fixing ability for replenishing the soil N lost after frequent prescribed burning. This study aimed to explore to what extent physiological responses of these species differ 7 and 12 years after last fire. Two most common understorey Acacia spp., Acacia leiocalyx and A. disparrima, as well as one non-leguminous Eucalyptus resinifera, were studied ...
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    Eucalyptus spp. is a dominant tree genus in Australia and most Eucalyptus spp. are canopy dominant species. In Australian natural forests, Eucalyptus spp. commonly are associated with understorey legumes which play a crucial role for ecological restoration owing to their nitrogen (N) fixing ability for replenishing the soil N lost after frequent prescribed burning. This study aimed to explore to what extent physiological responses of these species differ 7 and 12 years after last fire. Two most common understorey Acacia spp., Acacia leiocalyx and A. disparrima, as well as one non-leguminous Eucalyptus resinifera, were studied due to their dominance in the forest. Both A. leiocalyx and A. disparrima showed higher carbon (C) assimilation capacity, maximum photosynthetic capacity, and moderate foliar C/N ratio compared with E. resinifera. A. leiocalyx showed various advantages compared to A. disparrima such as higher photosynthetic capacity, adaptation to wider light range and higher foliar total N (TNmass). A. leiocalyx also relied on N2-fixing ability for longer time compared to A. disparrima. The results suggested that the two Acacia spp. were more beneficial to C and N cycles for the post burning ecosystem than the non-N2-fixing species E. resinifera. A. leiocalyx had greater contribution to complementing soil N cycle long after burning compared to A. disparrima.
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    Journal Title
    Environmental Science and Pollution Research
    Volume
    22
    Issue
    13
    DOI
    https://doi.org/10.1007/s11356-015-4223-2
    Subject
    Chemical sciences
    Environmental sciences
    Environmental management
    Biological sciences
    Publication URI
    http://hdl.handle.net/10072/153773
    Collection
    • Journal articles

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