Abigail M. York

An Empirical Evaluation of Private Landowner Participation in Voluntary Forest Conservation Programs

The use of voluntary programs targeting resource conservation on private land has become increasingly prevalent in environmental policy. Voluntary programs potentially offer significant benefits over regulatory and market-based approaches. This article examines the factors affecting landowner participation in voluntary forest conservation programs using a combination of parcel-level GIS and remotely sensed data and semi-structured interviews of landowners in Monroe County, Indiana. A logistic regression model is applied to determine the probability of participation based on landowner education, membership in other non-forest voluntary programs, dominant land use activity, parcel size, distance from urban center, land resource portfolios, and forest cover. Both land use activity and the spatial configuration of a landholder’s resource portfolio are found to be statistically significant with important implications for the design and implementation of voluntary programs.

Land fragmentation under rapid urbanization: A cross-site analysis of Southwestern cities

Explosive population growth and increasing demand for rural homes and lifestyles fueled exurbanization and urbanization in the western USA over the past decades. Using National Land Cover Data we analyzed land fragmentation trends from 1992 to 2001 in five southwestern cities associated with Long Term Ecological Research (LTER) sites. We observed two general fragmentation trends: expansion of the urbanized area leading to fragmentation in the exurban and peri-urban regions and decreased fragmentation associated with infill in the previously developed urban areas. We identified three fragmentation patterns, riparian, polycentric, and monocentric, that reflect the recent western experience with growth and urbanization. From the literature and local expert opinion, we identified five relevant drivers – water provisioning, population dynamics, transportation, topography, and institutions – that shape land use decision-making and fragmentation in the southwest. In order to assess the relative importance of each driver on urbanization, we linked historical site-specific driver information obtained through literature reviews and archival analyses to the observed fragmentation patterns. Our work highlights the importance of understanding land use decision-making drivers in concert and throughout time, as historic decisions leave legacies on landscapes that continue to affect land form and function, a process often forgotten in a region and era of blinding change.

Ethnic and Class Clustering through the Ages: A Transdisciplinary Approach to Urban Neighbourhood Social Patterns

This paper presents initial findings from longer-term transdisciplinary research concerning the social dynamics of urban neighbourhoods. It examines the spatial clustering of ethnicity and class in neighbourhoods over urban history, from Bronze Age Mesopotamia to contemporary cities. Fourteen distinct drivers of social clustering are identified, grouped under the headers of macro-structural forces, the state, local regimes and institutions, and bottom–up processes. The operation of these processes is examined through three historical and three archaeological case studies of clustering. It is concluded that: clustering is a common, but not universal, attribute of cities; there is much variation in clustering patterns, both within and between cities and urban traditions; and, consideration of a wide variety of drivers is required to understand historical and modern residential dynamics.

A comparative gradient approach as a tool for understanding and managing urban ecosystems

To meet the grand challenges of the urban century—such as climate change, biodiversity loss, and persistent poverty—urban and ecological theory must contribute to integrated frameworks that treat social and ecological dynamics as interdependent. A socio-ecological framework that encapsulates theory from the social and ecological sciences will improve understanding of metropolitan dynamics and generate science for improved, sustainable management of urban ecosystems. To date, most urban ecological research has focused on single cities. A comparative approach that uses gradients within and between cities is a useful tool for building urban ecological theory. We offer five hypotheses that are testable using a comparative, gradient approach: (i) the current size, configuration, and function of larger metropolitan ecosystems predicts the potential trajectory of smaller urban areas; (ii) timing of growth explains the greatest variance in urban ecosystem structure and function; (iii) form and function of urban ecosystems are converging over time; (iv) urban ecosystems become more segregated and fragmented as populations increase; and (v) larger cities are more innovative than smaller cities in managing urban ecosystems.

Service Access in Premodern Cities: An Exploratory Comparison of Spatial Equity

Spatial equity studies measuring urban service access have been conducted in variety of modern settings, but this research has not been extended to premodern cities. This article presents an exploratory, transdisciplinary pilot study of service access in six premodern urban environments to better understand the historical origins of inequality. Using archaeological and historical spatial data, neighborhood and household access to three types of service facility is studied across different urban traditions. Findings reveal that the size, shape, and spatial structure of cities may influence service accessibility as much as political influence over facility siting or residential choice. Most cities display a spatially concentric pattern of accessibility, and denser cities tend to display more equitable service access. Elite groups possess consistently better service access than nonelite groups. Although this exploratory study must be expanded to produce firmer results, it indicates the importance of interpreting modern urban inequalities from a long-term perspective, and points to the efficacy of comparative, spatially oriented, urban historical research for generating new insights into urban processes.

Cognitive and institutional influences on farmers’ adaptive capacity: insights into barriers and opportunities for transformative change in central Arizona

The prospect of unprecedented environmental change, combined with increasing demand on limited resources, demands adaptive responses at multiple levels. In this article, we analyze different attributes of farm-level capacity in central Arizona, USA, in relation to farmers’ responses to recent dynamism in commodity and land markets, and the institutional and social contexts of farmers’ water and production portfolios. Irrigated agriculture is at the heart of the history and identity of the American Southwest, although the future of agriculture is now threatened by the prospect of “mega-droughts,” urbanization and associated inter-sector and inter-state competition over water in an era of climatic change. We use farm-level survey data, supplemented by in-depth interviews, to explore the cross-level dimensions of capacity in the agriculture–urban nexus of central Arizona. The surveyed farmers demonstrate an interest in learning, capacity for adaptive management and risk-taking attitudes consistent with emerging theory of capacity for land use and livelihood transformation. However, many respondents perceive their self-efficacy in the face of future climatic and hydrological change as uncertain. Our study suggests that the components of transformational capacity will necessarily need to go beyond the objective resources and cognitive capacities of individuals to incorporate “linking” capacities: the political and social attributes necessary for collective strategy formation to shape choice and opportunity in the future.

Residential development during the Great Recession: a shifting focus in Phoenix, Arizona

Where people choose to live and the type of city their decisions create has formed the basis of decades of scholarly endeavor. While the typical notion of a tradeoff between access and space remains important, residential choice is more than ever shaped by the dynamics of sprawl, polycentricity, land-use institutions (zoning), and the composition of the immediately surrounding area. We analyze these new dynamics with a logistic regression model of the determinants of single-family residential development at the parcel-level in Phoenix, Arizona, during the 2002–2006 real estate boom and the 2006–2012 crash and global recession. Results show a preference for cheaper land and agricultural conversion farther from urban subcenters during the boom, while zoning, though relatively inconsistent with actual land use, is an indicator of future development. Development trajectories change dramatically during the bust, disproportionately impacting agricultural conversions and previously fast-growing areas while highlighting the depth of impact that the financial environment has on land-use change.

Rules, Norms, and Injustice: A Cross-Cultural Study of Perceptions of Justice in Water Institutions

Access to water is often inequitable, and perceived as unjust by stakeholders. Based on qualitative analysis of 135 ethnographic interviews in Bolivia, Fiji, Arizona, and New Zealand, we conduct a cross-cultural analysis to test for shared notions of justice in water institutions (i.e., rules, norms). A key finding is that institutional rules are a common concern in evaluations of justice, but institutional norms were prominent in justice evaluations only in the Bolivia site (where water access problems are most acute). Similarly, while concerns related to distributive and procedural justice were widely shared across community sites, interactional justice was only a salient concern in Bolivia. We propose that the study of water and other natural resource institutions will benefit from an expanded concept of environmental justice that includes interactional injustices and also a more explicit analytic focus on institutional norms, particularly for communities that face resource scarcity and less-developed economic conditions.

Methodological Advances in the Spatial Analysis of Land Fragmentation

This article evaluates the effect of moving window (MW) size on observed fragmentation spatial patterns and proposes a method to identify an effective MW size using Simpsons diversity index. To test the robustness of the proposed method, we demonstrate its use in six cities in the Phoenix metropolitan area that have substantial variation in land composition and configuration. Next we explore the effects of gradient observation scale and the role of scale in removing noise. We compare and discuss two popular approaches to measuring urban-to-rural fragmentation gradients—concentric ring- and transect-based approaches—highlighting the usefulness of each approach in an extensive and rapidly urbanizing region. This study provides a new method for selecting window size, offers insights on scale effects, and provides guidance on gradient scale selection to achieve the best representation of land fragmentation patterns for urban analysis.

ZONING AND LAND USE: A TALE OF INCOMPATIBILITY AND ENVIRONMENTAL INJUSTICE IN EARLY PHOENIX

ABSTRACT: Little attention has been paid to the role of early land use institutions in development patterns, the creation of disamenity zones of environmental injustice, and the promotion of space-consuming suburban development. This study uses historic Sanborn Fire Insurance maps and spatial analytic techniques to expose zoning’s tendency to spread disamenities and disperse incompatible land uses in early Phoenix. While on paper Euclidean zoning’s stratification of land uses in Phoenix promotes progressive ideals for reduction of blight and improvement of city health, analysis at a finer scale using Sanborn maps reveals that zoning decisions in Phoenix tended to promote the expansion of fragmented land uses, especially disamenity zones that targeted poor minority neighborhoods. Zoning encouraged the expansion of industry while attracting residents to newly developed suburbs with guaranteed protection from blight.