Gradients of functionality of Australian rangeland landscapes:Assessing changes over time with remote sensing

摘要

@@Introduction Unlike Australia's temperate ecosystems,the tropical savanna landscapes are in relatively unmodified condition.Disturbances such as fire,logging/thinning and grazing occur within these landscapes and can be both temporally and spatially variable,increasing landscape heterogeneity but rarely resulting in well-defined patch boundaries.Instead the tree stratum and underlying grassy ground layer varies continuously at the local-scale.