Spatial Autocorrelation in Ecological Studies: A Legacy of Solutions and Myths

A major aim of including the spatial component in ecological studies is to characterize the nature and intensity of spatial relationships between organisms and their environment. The growing awareness by ecologists of the importance of including spatial structure in ecological studies (for hypothesis development, experimental design, statistical analyses, and spatial modeling) is beneficial because it promotes more effective research. Unfortunately, as more researchers perform spatial analysis, some misconceptions about the virtues of spatial statistics have been carried through the process and years. Some of these statistical concepts and challenges were already presented by Cliff and Ord in 1969. Here, we classify the most common misconceptions about spatial autocorrelation into three categories of challenges: (1) those that have no solutions, (2) those where solutions exist but are not well known, and (3) those where solutions have been proposed but are incorrect. We conclude in stressing where new research is needed to address these challenges.     

The Bang Beggars of Derry city: borough policing in Londonderry,c.1832–70

Was Derry's independent city police force wholly inadequate, was it just inefficient for the suppression of riots; or was it the demonstration of politico-religious partisanship that ensured the force's abolition in 1870? This paper will attempt to explore and answer these three questions. It will also look at the borough force in some detail, examining issues with regard to the force's pay, discipline, its duties and conditions of service. It will not attempt to analyse Derry's nineteenth-century riots or the political and sectarian issues surrounding these riots, except where aspects of these directly affected the borough police.     

Bringing the ‘invisible farmer’ into sharper focus: gender relations and agricultural practices in the Peak District (UK)

Women's farm work and the gendered nature of the farm space and farm practices have been important intersecting themes within feminist enquiry over the last 30 years. Much research has tended to underplay the wider evolution of these gender relations – leaving under-explored the longer-term formation and contestation of the gendered activities, spaces and identities observed in the present. This article draws on research on 64 farms in the Peak District (UK) to take a wider temporal view of farm gender relations. Utilising a farm life history approach the article considers three key moments within farming histories to explore the active role(s) played by women in shaping farms and farming practices. In doing so the article adds complexity and nuance to understandings of both processes, such as the ‘masculinisation’ of agriculture, and to the gendered geographies of the farm space.     

Sourcing temper sands in ancient ceramics with U–Pb ages of detrital zircons: a southwest Pacific test case

Through use of methodology common in sedimentary geology, we apply U–Pb ages of detrital zircons to source nonlocal temper sand in an ancient ceramic assemblage recovered from Roviana Lagoon of the New Georgia Group in the Solomon Islands. Most potsherds from the Roviana Lagoon contain local volcanic sand as temper, but a small number of sherds contain anomalous granitic temper sand that does not appear to be local. To determine the origin of the anomalous temper, ages of zircons from the anomalous Roviana sherds are compared with ages of zircons in materials from Lizard Island off the Queensland coast and in sand from Muyuw Island in the Solomon Sea where generically similar granitic sands occur. U–Pb analyses of grains from the Roviana sherds yield Middle Miocene ages, while analyses of grains from Lizard Island granitic bedrock, sand, and local potsherds yield much older Permian-Triassic ages, disproving any possibility that the Roviana sherds were derived from Lizard Island, but suggesting local production of the Lizard Island sherds. Ages of grains in a sand sample from Muyuw Island are nearly identical to the ages of grains in the Roviana sherds. All grains in the Muyuw sand are Middle Miocene in age, overlapping closely with the Roviana age population. This strong similarity in detrital zircon signals indicates that the Roviana temper was likely derived from Muyuw Island sands. Our test case for the use of U–Pb ages of detrital zircons in sourcing temper sands is of only regional significance, and not of intrinsic global interest. The methodology, however, should find wide applicability for sourcing temper sands in many parts of the world, for it provides more specific data for the origins of tempers than either petrographic or chemical analysis.     

What Use Are Units? Critical Geographies of Alcohol Policy

Abstract: This paper interrogates the multiple spatialities bound up with the consumption of units as the dominant means of diagnosing “health‐related” alcohol problems and measuring “drunkenness” in international alcohol policy and research. In order to question the power afforded to units, we work at the intersection of theoretical debates concerning biopower and governmentality; emotional, embodied and affective geographies and actor network theory. Presenting empirical research from the UK we contribute to geographical agendas that seek to consider the ontological and epistemological understandings of alcohol, drinking and drunkenness. The paper concludes by calling for dialogue between social, health and medical scientists in order to develop more pertinent ways of understanding and representing the risks and benefits of alcohol consumption.     

KNOWLEDGE MATTERS: THE LONG‐RUN DETERMINANTS OF STATE INCOME GROWTH*

ABSTRACT State per capita income differences narrowed considerably between 1939 and 1976. However, this convergence has been incomplete. We examined the sources of relative per capita income growth using an augmented growth model and a panel of the 48 contiguous states from 1939 to 2004. We explored the effect of tax burdens, public infrastructure, size of private financial markets, rates of business failure, industry structure, climate, educational attainment, and technology production. Our results show that a state's technology and its college attainment rates are the main factors that allow some state's per capita income to remain above those of other states.