A spatiotemporal analysis of private garden area in North-East Melbourne: 2010-2021

© 2021 Jacob Aran ZamoraUrban densification and expansion are occurring simultaneously in Melbourne, Australia; manifesting in a loss of nature outside and within the urban environment. However, Australian cities are biodiverse hotspots due to the interconnection of vulnerable native species and variation of habitat sizes, with 40.7% of urban vegetation cover in private residential land. The absence of urban planning regulations on garden retention and practices of urban densification in Melbourne have degraded the ecological networks and risk the social ‘extinction of everyday nature experience’ as greater dwelling density decreases both public and private spaces, and once land has been built upon it has lost its potential for conservation. Despite the importance of private spaces for ecological sustainability in Melbourne, there has been no attempt to spatially analyse the changes of private garden area in relation to densification over the past decade. The research objective is to spatially analyse the changes in area of private gardens in sixteen Statistical Areas Level 1 (SA1) sites, over two time scales 2010 and 2021 in the North East Melbourne municipal councils of Banyule and Darebin. The analysis was conducted to address the following research questions: 1) what is the spatiotemporal change of private gardens and public green space in the North East of Melbourne?; and 2) to what extent are land-use planning mechanisms and spatial dependencies effecting changes in private garden size? The results showed that a potential total loss of private gardens equivalent to 229.79 ha, which is equal size to Albert Park and Lake in Melbourne, has occurred in Banyule and Darebin between 2010 and 2021 while public green space quantity and size has not increased. Meanwhile, loss of private garden has occurred independent from spatial effects such as proximity to public green space and major transportation routes. Similarly, although land-use planning regulations have disproportionately affected the scale of private garden loss, they are not a dependent variable as loss has occurred extensively across zones and overlays