Exotic megaherbivores as ecosystem engineers in Australian savannas: do they facilitate predator movement?Georgina Neave 1*, Brett P. Murphy1, Tiwi Rangers2 and Hugh F. Davies1,31Research Institute for the Environment and Livelihoods, Charles Darwin University, Casuarina, Northern Territory, Australia 08102Tiwi Resources Pty Ltd, Casuarina, Northern Territory, Australia 08113School of Environmental and Rural Science, University of New England, Armidale, NSW, Australia 2350*Corresponding author: georgina.neave@proton.me