Journal of the Royal Society of New Zealand abstracts
Enhanced dust deposition by trees recently established on degraded
rangeland
Hamish McGowan1 and Nick Ledgard2
1School of Geography,
Planning and Architecture, The University of Queensland, St Lucia,
Brisbane 4072, Australia. Email: h.mcgowan@uq.edu.au
2New Zealand Forest Research Institute
Ltd, Ilam, Christchurch, New Zealand.
Abstract Results from 2 years of dust deposition
monitoring in a 10-year-old Pinus nigra plantation near Lake
Tekapo are presented. They show that recently established plantations
significantly enhance dust deposition rates. This could reverse a cycle
of soil loss and enhance vertical accretion of soil, which would
provide more options for future land use. However, observations
indicate that even under such enhanced conditions for soil formation,
it would take several thousand years to replace the soil lost to
erosion since European farming practices were first introduced to the
northern section of the Mackenzie Basin.
Keywords degraded rangeland; wind erosion; dust
deposition; foehn; plantation; soil formation
R04002 Received 11 February 2004; accepted 20 January 2005; Online
publication date 30 August 2005
Journal of the Royal Society of New Zealand Volume 35, Number 3,
September, 2005, pp 269–277
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