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Water requirements of biota, geomorphology and climate change in the Macquarie Marshes

Chapter


Abstract


  • The Macquarie Marshes, on the lower reaches of the Macquarie River, are the largest and one

    of the most ecologically significant f loodplain wetland systems in the Murray-Darling Basin of

    south-east Australia. All wetlands, such as the Macquarie Marshes, rely on the supply of water

    for their long-term survival (Mitsch and Gosselink 2000) and distinct f lood events provide

    inundation which maintains their ecological character. In accordance with the f lood pulse

    concept (Junk et al. 1989), f looding is the ‘principal driving force responsible for the existence,

    productivity and interactions of the major biota’ (Junk et al. 1989, p. 110) in most f loodplain

    wetlands. Although the f lood pulse concept theoretically does not apply to river systems with

    highly variable f low regimes, Walker et al. (1995) proposed that biota in variable environments

    and habitats develop strategies such as opportunism and f lexibility as adaptations to f low variability.

    They suggest that the f lood pulse concept may apply to f loodplains with variable f low

    regimes, such as the Macquarie Marshes. To adequately account for the ecological role of

    f looding on f loodplain biota, Junk et al. (1989, p. 112) claimed that ‘the resulting physicochemical

    environment causes the biota to respond by morphological, anatomical, physiological,

    phenological, and/or ethological adaptations, and produce characteristic community

    structures’ in f loodplain wetlands. Thus, ecosystems such as those in the Macquarie Marshes

    are likely to be both shaped and sustained by f loodwaters from upstream, since these f lows

    inf luence the wetland environments within the system.

Authors


  •   Rogers, Kerrylee
  •   Ralph, Tim J. (external author)
  •   Imgraben, Sarah (external author)

Publication Date


  • 2010

Citation


  • Rogers, K., Ralph, T. J. & Imgraben, S. (2010). Water requirements of biota, geomorphology and climate change in the Macquarie Marshes. In N. Saintilan & I. Overton (Eds.), Ecosystem Response Modelling in the Murray-Darling Basin (pp. 151-170). Collingwood, Vic: CSIRO Publishing.

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/564

Book Title


  • Ecosystem Response Modelling in the Murray-Darling Basin

Start Page


  • 151

End Page


  • 170

Place Of Publication


  • Collingwood, Vic

Abstract


  • The Macquarie Marshes, on the lower reaches of the Macquarie River, are the largest and one

    of the most ecologically significant f loodplain wetland systems in the Murray-Darling Basin of

    south-east Australia. All wetlands, such as the Macquarie Marshes, rely on the supply of water

    for their long-term survival (Mitsch and Gosselink 2000) and distinct f lood events provide

    inundation which maintains their ecological character. In accordance with the f lood pulse

    concept (Junk et al. 1989), f looding is the ‘principal driving force responsible for the existence,

    productivity and interactions of the major biota’ (Junk et al. 1989, p. 110) in most f loodplain

    wetlands. Although the f lood pulse concept theoretically does not apply to river systems with

    highly variable f low regimes, Walker et al. (1995) proposed that biota in variable environments

    and habitats develop strategies such as opportunism and f lexibility as adaptations to f low variability.

    They suggest that the f lood pulse concept may apply to f loodplains with variable f low

    regimes, such as the Macquarie Marshes. To adequately account for the ecological role of

    f looding on f loodplain biota, Junk et al. (1989, p. 112) claimed that ‘the resulting physicochemical

    environment causes the biota to respond by morphological, anatomical, physiological,

    phenological, and/or ethological adaptations, and produce characteristic community

    structures’ in f loodplain wetlands. Thus, ecosystems such as those in the Macquarie Marshes

    are likely to be both shaped and sustained by f loodwaters from upstream, since these f lows

    inf luence the wetland environments within the system.

Authors


  •   Rogers, Kerrylee
  •   Ralph, Tim J. (external author)
  •   Imgraben, Sarah (external author)

Publication Date


  • 2010

Citation


  • Rogers, K., Ralph, T. J. & Imgraben, S. (2010). Water requirements of biota, geomorphology and climate change in the Macquarie Marshes. In N. Saintilan & I. Overton (Eds.), Ecosystem Response Modelling in the Murray-Darling Basin (pp. 151-170). Collingwood, Vic: CSIRO Publishing.

Ro Metadata Url


  • http://ro.uow.edu.au/smhpapers/564

Book Title


  • Ecosystem Response Modelling in the Murray-Darling Basin

Start Page


  • 151

End Page


  • 170

Place Of Publication


  • Collingwood, Vic