Human refugia in Australia during the Last Glacial Maximum and Terminal Pleistocene: a geospatial analysis of the 25–12 ka Australian archaeological record

A number of models, developed primarily in the 1980s, propose that Aboriginal Australian populations contracted to refugia – well-watered ranges and major riverine systems – in response to climatic instability, most notably around the Last Glacial Maximum (LGM) (∼23–18 ka). We evaluate these models using a comprehensive continent-wide dataset of archaeological radiocarbon ages and geospatial techniques. Calibrated median radiocarbon ages are allocated to over-lapping time slices, and then K-means cluster analysis and cluster centroid and point dispersal pattern analysis are used to define Minimum Bounding Rectangles (MBR) representing human demographic patterns. Exploring data between 25 and 12 ka, we find a refugia-type hunter-gatherer response during the LGM (∼23–18 ka) and again during the Antarctic Cold Reversal (ACR) (∼14.5–12.5 ka), with expansion in the intervening period. Several refugia persist between 25 and 12 ka, including (by Interim Biogeographic Regionalisation for Australia areas) Gulf Plains/Einasleigh Uplands, Brigalow Belt South, Murray Darling Depression, and Tasmanian Central Highlands. Others appear sporadically through the same period. These include South Eastern Highlands, NSW South Western Slopes, Sydney Basin, Warren, Murchison, Gascoyne, Central and Northern Kimberley, Ord Victoria Plain, Arnhem Plateau, MacDonnell Ranges and Central Ranges. The Pilbara may also have been a refugium during the LGM, but geospatial results are problematic for this region. Areas devoid of human activity (‘barriers’) include the main desert regions, especially in the south and west of the continent, although some of these may be the result of an absence of archaeological fieldwork. Point dispersal pattern analysis indicates a reduction in occupied territory of nearly 80% during the LGM. A reduction of close to 50% was also evident during the ACR. A large number of the refugia were in close proximity to glaciated areas during the LGM, and probably benefitted from increased summer snowmelt along the major river systems. The remaining refugia are likely the result of a range of local environmental and resource factors. We identify areas for future research, including a focus on regional studies to determine possible cryptic or idiosyncratic refugia emerging in phlyogeographic studies.     

‘On Diego Garcia no one never got ill’ (Respond to this article at http://www.therai.org.uk/at/debate)

The history of the Chagos Islanders was recently highlighted in a semi‐fictionalised production A few man Fridays performed by the Cardboard Citizens Theatre company at the Riverside Studios in London. The month‐long run finished on March 10. I went to the penultimate performance. Also in attendance were a small number of native‐born Chagossians and their children. During the interval, I fell into conversation with Anthony, a 50‐year‐old Chagossian, who was born on the island of Diego Garcia. Along with other members of his family, Anthony was deported from his homeland by the British authorities to make way for a strategically important US base. With 500 or so compatriots he was taken by boat and dumped in the Seychelles. Around 1500 other Islanders were taken to Mauritius. In 2002, however, Chagossians were granted British citizenship. Some 1500 islanders, mainly those from Mauritius but a few from the Seychelles, have now settled in Crawley in West Sussex. But Anthony, along with his sister and her children, is living in rented accommodation in Pimlico in south London. According to Anthony, a primary motivation for his coming to the UK was to seek better healthcare to deal with his type II diabetes. “On Diego Garcia no one ever got ill,” he said. Perhaps this claim should be taken more seriously than conventional functionalist explanations allow.     

Bureaucratic Competition in the Policy Process

Recent scholarship has emphasized the important role that strategic bureaucratic actors play in the formulation of public policy. This study builds on that research by exploring the ways in which agencies strategically compete with one another over the content and character of public policy. Using insights from the literature that explicitly models bureaucratic competition, the study adapts an existing model of policymaking in subsystems to generate expectations about the causes and consequences of bureaucratic competition in the policy process. Finally, the article explores the utility of these propositions through a case study of a protracted policy battle over the management of natural resources in the western United States.     

Selling Urban Housing in London. Can High-density Urban Living Be Sold to a Sceptical British Public? Distinction,Mobility, and Control over Environment

Marketing materials from brownfield housing developments in London are analysed in order to evaluate the extent to which the British government's 'urban renaissance' goals can overcome public scepticism and a historical distaste for high-density urban living. A case study of Tunnel Wharf in Rotherhithe is presented along with a broader analysis of marketing materials from other developments. These marketing efforts suggest that urban living can be successfully sold to some segments of the British public, in large part by playing to cities' natural strengths. However, these sales pitches rely heavily on appeals to such themes as exclusivity and the ability to control one's environment, and thus raise broader questions about the viability and coherence of the urban renaissance vision. Specifically, it is suggested that the psychological response to increased urban densities may imply possible trade-offs between the preservation of countryside and the promotion of 'urbanity' in cities.     

Tacit knowledge transfer via interlocking directorates: A comparison of Canada and the United States

This paper explores geography as a contributing factor to knowledge transfer among Canadian and American firms. We argue that the knowledge networks of the two countries are moving in opposite directions. Canada's network is converging into fewer cities while the American network encompasses a greater number of cities. When the knowledge networks of Canada and the United States are explored, national and local boundaries are found to impede the movement of corporate knowledge. Prior to our discussion on its spatiality, the concept of knowledge is introduced and its relation to individuals and firms of the Canadian and American corporate network is examined.