The impact of exotic grass invasions on nitrogen cycling: a mini-review

The impact of exotic grass invasions on nitrogen cycling: a mini-review

Title
Publication TypeConference Paper
Year of Publication2006
AuthorsRossiter, NA, Setterfield, SA, Douglas, MM, Assoc Prof Hutley, LB, Cook, GD
EditorPreston, C, Watts, JH, Crossman, ND
Conference Name15th Australian Weeds Conference: Managing Weeds in a Changing Climate
Date Published24-28 September, 2006
PublisherWeed Management Society of South Australia
Conference LocationAdelaideAustralia
ISBN Number0 646 46344 6
Abstract

We reviewed the impact of exotic grass invasions on nitrogen cycling by examining studies that compared N cycling in native grass and exotic grass invaded habitats. A total of 30 studies were identified, with grass invasions affecting N cycling over awide range of habitats and regions. Eleven individual exotic grass species were identified as changing aspects of N cycling, with five more species occurring as exotic grass mixtures. While grass invasion commonly led to increases in biomass, there werefew consistent effects on plant and soil N pools and fluxes. There was often variation within a species between sites and years, suggesting that environmental factors such as soil moisture, soil type and native community composition may play a significant role in the magnitude and direction of the impact of exotic grasses on N. No studies examined the impact of exotic grass -mediated changes in fire regimes on N cycling - a potentially significant impact in many exotic grass invaded communities.

URLhttp://espace.cdu.edu.au/view/cdu:2311

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Rossiter, N. A., Setterfield, S. A., Douglas, M. M., Assoc Prof Hutley, L. B. & Cook, G. D. The impact of exotic grass invasions on nitrogen cycling: a mini-review. 15th Australian Weeds Conference: Managing Weeds in a Changing Climate (Preston, C., Watts, J. H. & Crossman, N. D.) 815 - 818 (Weed Management Society of South Australia, 2006). at <http://espace.cdu.edu.au/view/cdu:2311>

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