In many fragmented agricultural regions of south-eastern Australia, roadside vegetation provides important refuges for threatened native fauna and isolated populations of plant species. However, as roads are transport corridors for humans and their vehicles, species survival is affected through destruction and modiﬁcation of remaining habitat by human activity. The effects of soil disturbance from roadworks on the structural dynamics and spatial patterning of roadside Acacia populations was investigated in the Lockhart Shire study area, NSW, Australia. Classiﬁcation and ordination of size structures of Acacia pycnantha, A. montana and A. decora showed distinct groups of colonising, stable and senescent populations. Soil disturbance from previous roadworks was recorded in 88 percent of populations, and there was a signiﬁcant relationship between major recruitment pulses and roadworks events in Acacia populations. Spatial pattern analysis using the Network K-function showed signiﬁcant clustering of older senescent populations, and Discriminant Function Analyses revealed that road verge width, road category, disturbance intensity, and distance to nearest town were highly signiﬁcant variables in relation to disturbance regimes from roadworks activities. These results have highlighted the importance of understanding human logic regarding roadworks activities, in ongoing management of roadside vegetation, and has important consequences regarding conservation of these unique environments.
|Title of host publication||Proceedings of the 2003 International Conference on Ecology & Transportation (ICOET 2003)|
|Number of pages||5|
|Publication status||Published - 2003|
|Event||IENE International Conference on Ecology and Transportation: ICOET 2005 - San Diego, United States|
Duration: 29 Aug 2005 → 02 Sep 2005
|Conference||IENE International Conference on Ecology and Transportation|
|Period||29/08/05 → 02/09/05|