Ryan McAllister and others use the network mapping methods of Martin Rosvall and Carl T Bergstrom (see previous post) to analyze the research impact of Australian arid lands literature in the paper - McAllister et al. 2009. Research impact within the international arid literature: An Australian perspective based on network theory. Journal of Arid Environments 73(9) 862-871 (doi:10.1016/j.jaridenv.2009.03.014).
The figure below show the different research subfields McAllister et al. identified within arid lands research and the citation links among them.