Increased invasion of environmental weeds
‘Environmental weeds are plants (exotic and native) that invade natural ecosystems and can cause major modifications to indigenous species and ecosystem function’ (State of the Environment, 2001)#. The occurance of weed invasion is higher in areas of disturbed habitat and/or areas of reduced competition from native species. Weed seeds can be dispersed by wind, by water, on the coats of animals, in the faeces of animals and on farm machinery and vehicles.
Suggested indicators: Weed species+, Weed cover+
Increased invasion of environmental weeds may be associated with:
|Potential associated impacts||Suggested indicators+|
|Toxic health risk to plants, animals and/or humans||
|Competition and stress to native vegetation|
|Changed fauna habitat (food, shelter, access to water, etc)||
|Changed riparian zone affecting buffering capacity and waterway health||
# State of the Environment 2001, Biodiversity theme report, Published by CSIRO on behalf of the Department of the Environment and Heritage, http://www.environment.gov.au/soe/2001/publications/theme-reports/biodiversity/indicators.html (accessed July 6, 2010)
+ Descriptions of indicators (PDF, 76K)* provides a brief description of each indicator including techniques and purpose.
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Last updated 7 September 2010