Vegetation community responses to altered flow regimes and weed invasion in reparian woodlands of the upper condamine floodplain, Eastern Australia

Reardon-Smith, Kathryn and Le Brocque, Andrew F. and House, Alan and Zammit, Charlie (2005) Vegetation community responses to altered flow regimes and weed invasion in reparian woodlands of the upper condamine floodplain, Eastern Australia. In: Ecological Society of Australia Annual Conference 2005 (ESA 2005), 28 Nov - 2 Dec 2005, Brisbane, Australia.

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Abstract

[Abstract]: This poster outlines the key research questions and methodologies used in a project investigating the relative roles of landscape-scale (land- and water-use regimes), patch-scale (management regimes) and population-scale (interspecies competitive regimes) change on the health and function of Eucalyptus tereticornis / E. camaldulensis riparian woodland communities of the Condamine floodplain (eastern Darling Downs, southern Queensland), and presents preliminary analyses of the floristic composition and condition of these communities. The Upper Condamine River is a regulated river system whose regulated flow regime is significantly altered from natural flows in terms of the volume, frequency and duration of in-stream and flooding flows; additional harvesting of groundwater and overland flows, coupled with high inherent regional climatic variability and potential climate change, indicate that water availability may be a key limiting factor in the long-term persistence of these ecosystems. A key hypothesis of the research is that widespread tree decline within these woodlands may indicate that water availability in these water-dependent habitats is approaching critical levels, exacerbated by significant infestation by the introduced weed lippia Phyla canescens, a highly-efficient competitor. The study takes a multi-dimensional approach (including time series streamflow and GIS-based spatial and temporal analysis, assessments of current community composition and condition, experimental manipulation to investigate mechanisms contributing to the competitive success of lippia, and an investigation of landholder responses to both eucalypt dieback and lippia infestation) aimed at developing an integrated understanding of the drivers and mechanisms of ecosystem decline and at deriving empirical information which will contribute to future land and water management decision-making.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Poster)
Refereed: Yes
Item Status: Live Archive
Additional Information: Poster presentation. Conference publication consists of only the abstracts of conference presentations. Published Abstract + full Poster made available here.
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 00:29
Last Modified: 17 Sep 2013 06:03
Uncontrolled Keywords: vegetation community responses, altered flow regimes, weed invasion, reparian woodlands, upper condamine floodplain, Eastern Australia
Fields of Research (FOR2008): 05 Environmental Sciences > 0502 Environmental Science and Management > 050204 Environmental Impact Assessment
05 Environmental Sciences > 0501 Ecological Applications > 050103 Invasive Species Ecology
05 Environmental Sciences > 0501 Ecological Applications > 050102 Ecosystem Function
URI: http://eprints.usq.edu.au/id/eprint/811

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