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Grader grass (Themeda quadrivalvis): changing savannah ecosystems.

Vogler, W.D. and Owen, N.A. (2008) Grader grass (Themeda quadrivalvis): changing savannah ecosystems. In: Proceedings of the 16th Australian Weeds Conference, 18-22 May 2008, Cairns, Queensland.

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Publisher URL: http://www.weedinfo.com.au

Abstract

Wayne Vogler and Nikki Owen recently published their paper 'Grader grass (Themeda quadrivalvis): changing savannah ecosystems' in Proceedings of the 16th Australian Weeds Conference. Grader grass is an invasive exotic 'high biomass' grass from India that is increasing its distribution in northern Australia. It is unpalatable and can dominate ecosystems, thereby decreasing grazing animal production, degrading conservation areas and increasing fire intensity and hazard. They studied aspects of its biology at a field site in north Queensland where the initial biomass of the grass layer was found to be 70% grader grass. Grader grass also produced 80% of the seed input into this ecosystem during the first growing season. These factors, in combination with a large viable seed bank and rapid germination at the start of the wet season, demonstrate the potential of grader grass to dominate and degrade the savannah ecosystems of northern Australia.

Item Type:Conference or Workshop Item (Paper)
Corporate Creators:QPIF
Additional Information:© R.G. and F.J. Richardson.
Keywords:Grader grass; invasive species; weeds.
Subjects:Science > Invasive Species > Plants > Weed ecology
Deposited On:27 Aug 2009 04:31
Last Modified:15 Jun 2011 00:39

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