Interdisciplinary foundations of urban ecology

Researchers have identified urban ecology as a new field integrating social and ecological science. Critics have portrayed the field as under-theorized with negative implications for research and urban environmental planning. Unprecedented urbanization and historical bias against research integrating social and ecological systems are identified as driving this deficit. Researchers have called for new integrative approaches to address this issue. In response, this paper applies ecology’s analytic framework of “patch dynamics”, Kuhn’s concept of “normal science” and Mazoyer and Roudart’s “evolutionary series” to demographic data and historical texts to perform an analysis of interdisciplinary contributions to theory applicable in the field of urban ecology. The subsequent exploration reveals a rich history of interdisciplinary inquiry along the nature/society divide. The paper concludes that these “largely ignored” contributions offer urban ecology the opportunity to claim much broader depth as a field gaining access to precedents and innovations accomplished during the field’s early theoretical development. Drawing upon this history, a framework for ecological urban development is suggested to inform and assist contemporary research in urban ecology and planning.

Bridging the divide in urban sustainability: from human exemptionalism to the new ecological paradigm

This paper reviews the main bodies of contemporary urban sustainability theory. From this analysis, two underpinning paradigms of urban sustainability are identified: (1) The ‘Human Exemptionalism Paradigm’ (HEP), which emphasizes the ability of humans to overcome environmental problems—see Urban Sociology, Urban Ecology, Urban Geography, Urban Psychology and Political Economy; and (2) The ‘New Ecological Paradigm’ (NEP), which emphasizes the criticality of ecological limits to human progress—see Urban Metabolism, Energy/Emergy Analysis and Ecological Footprinting. Each of these approaches is critically reviewed, highlighting their main assumptions, theoretical and practical foci. It is argued in the paper that if the related issues of urban sustainability and development are to be progressed, there needs to be: (1) a greater maturation of the NEP approaches, which are ‘relative newcomers’ to the area of urban theory; and (2) greater integration and dialogue between the HEP and NEP approaches to urban sustainability than has hitherto been the case.

Urban ecosystems: What would Tansley do?

The ecosystem concept was introduced in ecology originally to solve problems associated with theories of succession and ecological communities. It has evolved to become one of ecology’s fundamental ideas, and has proven to be applicable to a wide variety of research questions and applications. However, there is controversy about whether or how well the ecosystem concept is suited to urban habitats. By examining Arthur Tansley’s original presentation of the ecosystem concept, and exploring how the ecological context of the concept has changed, we indicate that the fundamental concept of the ecosystem is well suited to urban ecological studies. The concept can be clarified for urban use by including a social complex and a built complex to insure that human social institutions and actions, and the structures and infrastructure they build are explicitly included in the ecosystem concept. The ecosystem concept is thus seen as clearly robust to use in urban areas.

What is Adult Attachment?

This paper explores the concept of adult attachment. Although attachment theory is now getting a great deal of attention, there is not yet a clear picture of what it means to be attached in adulthood or what the clinical applications of the approach might be. Using Bowlby’s distinctive ethological-evolutionary framework and updating it with findings from neurobiology and attachment research, it is proposed there is an attachment behavioral system that operates throughout the lives of adults and that this changes the way we understand our clients’ distress and carry out psychotherapy.

Goal attainment in urban ecology research: A bibliometric review 1975–2004

We analyze a core literature of urban ecology (all articles published in Urban Ecology and Urban Ecosystems from 1975–2004, n = 261) to support a reflexive analysis of the field. We structure this critical analysis based on criteria derived from programmatic statements made by scientific societies, research funding organizations and academic institutions regarding what urban ecology should be. Specifically, we assess the extent to which the literature reflects, and has evolved to reflect, a commitment to

“We have a lot of goodwill, but we still need to eat…”: Valuing Women’s Long Term Voluntarism in Community Development in Lima

This paper focuses on recognizing the contribution made to development by grassroots women working on a voluntary basis in long term development projects. Using the example of healthcare, the paper problematizes the widespread move towards an increased reliance on voluntary and third sector provision. Drawing on literature around women’s community activism, the research considers the extent to which women carrying out health promotion work in Peru have taken on this role as more than “just voluntary work,” highlighting their long term commitment during more than a decade of health promotion activities. The paper develops debates around the professionalization of voluntary work, particularly considering the issue of economic remuneration for health promoters, and emphasizing the gendered nature of their voluntarism; concluding by questioning the sustainability of poor women’s long term, and largely unpaid, involvement as the linchpins of community development projects.

Appropriating the city: space,theory, and bike messengers

Over the last 30 years, social theorists have increasingly emphasized the importance of space. However, in empirical research, the dialectical relationship between social interaction and the physical environment is still a largely neglected issue. Using the theory of structuration, I provide a concrete example of why and how space matters in the cultural analysis of an urban social world. I argue that bike messengers—individuals who deliver time-sensitive materials in downtown cores of major cities—cannot be understood outside an analysis of space. Specifically, I connect the cultural significance of messenger practices to the emplacement of those practices inside the urban environment.

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Reduced prizes and increased effort in contests

We study the general class of two-player public-policy contests and specify the asymmetry condition under which a more restrained government intervention that reduces the contestants’ prizes has the “perverse” effect of increasing their aggregate lobbying efforts.

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Sacrificing Women: A Study of Ritualized Practices among Women Volunteers in India

This study addresses issues related to inequality formation and reproduction, especially in regard to gender dynamics operating in a non-western society. Grounded in a post-colonial understanding of urban educated upper and middle class women NGO volunteers in contemporary India, it analyzes how they negotiate new approaches to challenge existing traditional gender roles, yet in critical ways contribute to their reproduction, particularly the traditional concept of ideal Indian womanhood. Employing structural ritualization theory we examine how ritualized symbolic practices related to the traditional concepts of caretaking, sacrifice, and the concept of natural sexual differences continue to be emphasized in a generation confronted with conflicting expectations about modern women’s roles. Twenty-one testimonies provide the major source of evidence along with data gathered through participant observation. This research enhances our understanding of the power of rituals and how they can continue to shape the cognitions and activities of actors.

The effects of urbanization on ant communities and myrmecochory in Manitoba,Canada

With the increase in urbanization globally, there is an increased need to understand the ecology of forest fragments in urban and urbanizing landscapes. Although urban forests are known to be relatively lacking in plants whose seeds are dispersed by ants, little is known about the effects of urbanization on the community composition and behaviour of forest dwelling ants. Ant communities in forest fragments along an urban–rural gradient were described using a rapid quadrat search technique and multivariate analysis. Interactions between the ants and seeds of the myrmecochorous Viola pubescens within a subset of these forests were described using a series of cafeteria experiments. Urbanization was found to be associated with changes in microhabitat characteristics and a concomitant simplification of the ant community. Despite this, the removal rate of V. pubescens seeds actually increased in urban forests, which may be a result of the foraging behaviour of the remaining species.

Urban soil ecology as a focal point for environmental education

Direct contact with the natural world is an essential element of environmental education and a key to developing environmental literacy and a stewardship ethic. But providing this experience can be challenging in urban environments where many people believe nature only occurs “outside” the city, and urban biota are often unwelcome and perceived in negative terms. Since 80% of the United States’ population lives in or near urban areas, conservation educators and practitioners need to find ways to make nature accessible to this audience, thereby creating a public who can make informed decisions about environmental issues. Soil systems are an important, under-utilized resource for urban environmental education. Soils are ubiquitous and thus easily accessible and their communities can be effective focal points for introducing all levels of ecology, from populations to ecosystems. Soil and litter taxa are also intrinsically interesting, with discoveries of new species still being made in urban areas. By studying urban soil systems, students can develop an enhanced sense of place and an appreciation of the natural world and their connection to it thereby strengthening environmental stewardship. An important role exists for urban ecologists to work with educators to impart enthusiasm for and to augment educators’ understanding of soil systems.

Top-Down Civic Projects Are Not Grassroots Associations: How The Differences Matter in Everyday Life

Research on civic associations blurs an important distinction between the unfunded, informal, ongoing associations that theorists like de Tocqueville described versus current participatory democracy projects that are funded by the state and large nongovernmental organizations, are open to all, and are usually short-term. Based on a long-term ethnography of youth programs in the United States, this paper shows that entities like these, which participants and researchers alike often called “volunteer” or “civic” groups, operate very differently from traditional civic groups. The ethnography systematically details prevalent tensions that actors face when they try to cultivate the civic spirit in these increasingly typical organizations.

Constructing Gay and Lesbian Parent Families “Beyond the Closet”

This paper provides a multilayered analysis of how lesbian mothers and gay fathers construct their families in a social context that has been described by Steven Seidman (2004) as “beyond the closet.” We stress how our participants’ family-building experiences are comparable to other non-biologically related families, but distinct due to heterosexual dominance. Using in-depth qualitative interviews with 18 lesbian birth mothers and 22 gay fathers, the authors discuss how participants navigate heterosexual dominance in institutions and in personal interactions.

The scoring rules in an endogenous election

Plurality rule is mostly criticized from being capable of choosing an alternative considered as worst by a strict majority. This paper considers elections in which the agenda consists of potential candidates strategically choosing whether or not to enter the election. In this context, we examine the ability of scoring rules to fulfil the Condorcet criterion. We show for the case of three potential candidates that Plurality rule is the only scoring rule that satisfies a version of the Condorcet criterion in two cases: 1) when preferences are single-peaked and, 2) when preferences are single-dipped.

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Estimates of air pollution mitigation with green plants and green roofs using the UFORE model

The purpose of this study was to investigate the effect of green roofs and green walls on air pollution in urban Toronto. The research looked at the synergistic effects on air pollution mitigation of different combinations of vegetation by manipulating quantities of trees, shrubs, green roofs and green walls in the study area. The effects of these manipulations were simulated with the Urban Forest Effects (UFORE) model developed by the USDA Forest Service Northeastern Regional Station. While UFORE contains several modules, Module—D quantifies the levels of air pollution for contaminants such as NO₂, S0₂, CO, PM₁₀ and ozone as well as hourly pollution removal rates and the economic value of pollutant removal. Six vegetation scenarios were developed within the Toronto study area to compare different subsets of vegetation and their effect on air contaminants. Results of the study indicate that grass on roofs (extensive green roofs) could augment the effect of trees and shrubs in air pollution mitigation, placing shrubs on a roof (intensive green roofs) would have a more significant impact. By extension, a 10–20% increase in the surface area for green roofs on downtown buildings would contribute significantly to the social, financial and environmental health of all citizens.

The Decline in American Trade Union Membership and the “Government Substitution” Hypothesis:A Review of the Econometric Literature

This paper reviews the empirical literature on the “Government Substitution” hypothesis. We focus our attention on the sample periods used, model specification, and econometric technique. The seminal piece on this topic is Neumann and Rissman (J Labor Econ 2:175–192, 1984) and to date there have been less than a handful of extensions beyond this initial investigation. By tracking the limited development of this hypothesis over time we are able to conclude that there is still an opportunity for additional empirical exploration in this area.

The Impact of American Media Exposure and Self-Esteem on Chinese Urban Adolescent Purchasing Involvement

This study based on a sample of 429 Beijing high school students shows that Chinese urban adolescents’ purchasing involvement can be predicted by the adolescents’ self-esteem. Individuals’ self-evaluation motivates them to get involved in family purchasing activities. This study suggests that Chinese consumer involvement is potentially shaped by both cognitive factors (e.g., self-esteem) and social factors (e.g., media use). However, the study indicates that exposure to American mass media does not have significant impact on adolescents’ family purchasing involvement. This finding raises possibilities for further investigation in the area. Limitations and suggestions for future studies are provided.

Government Intervention in Public Sector Industrial Relations: Lessons from the Alberta Teachers’ Association

In the public sector, Canadian governments intervene frequently in labor disputes by suspending collective bargaining and curtailing legal strikes. Previous research has focused on the contours of government intervention, such as its overall effects on collective bargaining and strikes. The discussion highlights one actor, a government, restricting the behavior of another actor, a union, using legislation and policy making. As a result, we know less about more micro-level elements and implications of the process of government intervention. I address these themes using a detailed case study of the Alberta Teachers’ Association and the strikes it coordinated in 2002.

Is the customer always right? Class,service and the production of distinction in Chinese department stores

This article argues that service interactions can serve as key sites for the recognition and performance of class distinctions in urban China. The author develops the concept of distinction work to describe service work in which a key part of the service interaction becomes the recognition of a customer’s class position. A contrast between working-class and luxury service environments in urban China demonstrates that distinction work becomes especially important when retailers compete over customers who themselves seek social distinction from their shopping experiences. This study links the study of service work and class while providing a better understanding of the evolving culture of inequality and emerging structure of entitlement in reform era China.

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