A Satellite Analysis of Contrasting Fire Patterns in Aboriginal- and Euro-Australian Lands in Tropical North Australia

Abstract

We use satellite imagery to compare and contrast fi re patterns across a repeating mosaic of vegetation types occurring within the tropical savanna of the Northern Territory, Australia. Our study area included different land management settings that encapsulate three contrasting styles of management that have developed following European settlement in northern Australia: Decentralized fi re management carried out by small Aboriginal communities widely dispersed across a large landscape. Centralized fi re management carried out by park rangers and military land managers who implement a fi re management plan based on a paradigm of hazard reduction burning. Pastoral properties with a specifi c management objective of improving cattle yield by protecting and improving pasture with fi re. The lowland eucalypt savannas were the most burnt of any vegetation type, but within eucalypt savannas there were subtle differences in fi re frequency. The highest fi re frequencies were recorded in national park and military lands, intermediate frequencies on Aboriginal lands, and the lowest fi re frequencies on pastoral properties. Aboriginal lands had an even distribution of fi re throughout the dry season in contrast to the marked bias towards early dry season landscape burning on all Euro-Australian controlled lands. These fi ndings illustrate the impact of different management paradigms and cultural decisions about fi re on physical fi re patterns.