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Report No. 50

Weed Incursions Along Roads and Powerlines in the Wet Tropics World Heritage Area: The Potential of Remote Sensing as an Indicator of Weed Infestations

Research Report
Miriam W. Goosem and Stephen M. Turton
ISBN 0 86443 764 1
Extracts from Executive Summary (Download Executive Summary)

Section One: Weed Surveys Along Highways, Roads and Powerlines Clearings Traversing the Wet Tropics of Queensland World Heritage Area

The objective of this study was to undertake an initial basic spatial inventory to provide an understanding of the distribution of weed species and the relative ecological condition of selected road verges and powerline corridors within the Wet Tropics of Queensland World Heritage Area (WTWHA).

Section Two: Potential of Remote Sensing in the Monitoring of Weed Infestations Along Powerline Corridors

The objectives of this study were to (a) determine whether satellite or airborne imagery could discriminate individual weed species and the degree of spatial resolution provided by such imagery; (b) determine the suitability of 'spectral mixture analysis' for determining fractional quantities of weed species at the sub-pixel level; and (c) determine which sensor system is likely to provide the best overall result for the WTWHA.

Section Three: Weed Penetration, Edge Effects and Rehabilitation Strategy Success in Weedy Swathes of the Palmerston Powerline Clearing

The objectives of this study were to (a) examine the success of rehabilitation plantings across a powerline clearing in prevention of weed germination; (b) compare the penetration of weeds and weed seeds into the forest from powerline clearings with and without restoration plantings; and (c) examine the effect of edges on vegetation floristic composition at these treatments.

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