Suburban wildlife: Lessons,challenges, and opportunities

The United States, as well as most developed and many developing nations worldwide, is becoming increasingly urban and suburban.Although urban, suburban, and commercial development account for less than one percent to just over 20% of land use among states, 50–90% of the residents of those states can be classified as urban or suburban dwellers. The population of the U.S. as a whole has risen from being > 95% rural in the 1790s to about 80% urban-suburban today. With these changes in land use and demographic patterns come changes in values and attitudes; many urbanites and suburbanites view wildlife and nature differently than rural residents. These are among the challenges faced by wildlife biologists and natural resource managers in a rapidly urbanizing world. In 2003, we convened a symposium to discuss issues related to suburban wildlife. The papers presented in this special issue of Urban Ecosystems address the lessons learned from the early and recently rapidly expanding literature, the challenges we face today, and the opportunities that can help deal with what is one of the biggest challenges to conservation in a modernizing world.     

Terrestrial vertebrates in urban ecosystems: developing hypotheses for the Gwynns Falls Watershed in Baltimore,Maryland

We review the literature on terrestrial vertebrates in urban and urbanizing areas in terms of the new paradigm in ecology that focuses on the origin, spatial pattern, and current influences of habitat patches. Studies of terrestrial vertebrates have documented differences in species composition along an urban-rural gradient and have identified some of the key land use features associated with these differences. We use information from a database developed for the Gwynns Falls Watershed in Baltimore City and County, Maryland to demonstrate how a study of forest-dependent breeding birds could be used to identify mechanisms that account for differences in the bird communities of forest patches in urban areas, and to provide useful information to planners and managers involved in wildlife conservation and management.     

上海“十二五”城市建设方针和重点领域探讨

改革开放以来,上海城市建设的重心一直在中心城区。世博会后,城市建设的重心必将逐步转移至城郊地区。同时,上海已进入工业化后期阶段,只有统筹城郊发展,加快郊区建设步伐,才能在新起点上实现新飞跃。“十二五”时期上海城市建设方针应是“郊区为主,聚焦新城;生态优先,宜居为重;城乡统筹,协调发展”,聚焦综合性新城、农村基础设施等重点领域的投资建设。     

Exploring the Meaning of Rural Through Cognitive Maps1

Rural often is viewed as a setting for study rather than an object of study. Often a priori definitions of rural are used; these definitions may bear little resemblance to residents' understanding of the concept. A cognitive mapping experiment to explore the meaning of rural is undertaken in this paper. Results indicate that urban residents could readily identify rural areas on a blank map of Pennsylvania. Their responses to the question varied, however, with some respondents indicating urban areas or writing images on the map. A discussion of these thought processes and implications from these varying responses are presented. Then, the cognitive maps are compared to three commonly accepted definitions of rural. Population density was found to best approximate the areas that urban residents perceived as rural. The paper concludes by discussing policy implications of the findings.     

Digital Inequality and Place: The Effects of Technological Diffusion on Internet Proficiency and Usage across Rural,Suburban, and Urban Counties*

Recently researchers have made efforts to reconceptualize digital inequality into discrete levels. These levels reflect access to and diffusion of technologies, proficiency in Internet usage, and propensity to take advantage of the opportunities afforded by information and communication technologies for assistance in daily life. We assess the utility of this approach for studying digital inequality across rural, suburban, and urban counties. Based on data from a 2005 nationally representative random sample telephone survey of 2,185 adults, the results provide mixed support for using this approach to studying digital inequality. In particular, we find that rural residents use Internet technologies less for assistance in helping with economics and other daily activities when compared with individuals from suburban and urban areas; however, our results suggest that this relationship is the product of the slow diffusion of advanced technologies to rural areas. The implications of these findings for understanding this under‐theorized form of inequality are discussed, and we make contributions to this literature through empirically addressing issues of digital capital.     

Vascular plants along an urban-rural gradient in the city of Tampere,Finland

The aim of this study was to analyse the spatial distribution of vascular plants along a 21-kilometre rural–urban–rural transect in the city of Tampere, Finland. The study emphasised the distribution of native and non-native species, both in absolute numbers and proportionally. The observed differences are explained by the share of forest land, the number of detached houses, distance from the city centre, and human population. Non-natives showed the highest values in suburban areas. Still, the difference in number of non-natives between suburban and central areas was quite small. In the city of Tampere, there are not continuous large areas devoid of vegetation. The number of native species remained high until the urban core and natives dominated in the rural-type areas of the city. However, there was not a great difference in the number of native species between rural and suburban areas. In the suburban areas, the detached houses and block-of-flats have little effect on the general vegetation. Proportionally, the share of natives decreases in line with the urban traits of the city. Urbanisation therefore affects native species in Finland. Overall, the characteristic features of a Finnish city, such as dispersed urban structure, small population, late urbanisation, abundant natural vegetation (forest) and the qualities of Finnish forests, guarantee the continuing diversity of urban vascular plants.     

Foreclosure,Inequality, and the Difference That Place Makes

While the Great Recession and the associated rise in foreclosures significantly impacted households across the United States, default rates in rural areas and rural‐urban foreclosure differences have failed to attract substantial research attention. To expand the scale and scope of the foreclosure literature, this article examines place‐based differences in estimated foreclosure rates across U.S. counties, which are classified as urban, suburban, micropolitan, or rural. Defaults are considered both overall and for each county classification, and are related to income distribution and inequality, homeownership, adjudication of default, place‐based factors including amenity scores and proximity to urban areas, and geographic region. The article finds a complex relationship among these variables, with inequality itself negatively associated with default rates and lower‐middle?income households positively related to foreclosure. Further, while proximity to urban areas is positively related to foreclosure rates among nonurban counties, natural amenities are related to lower default rates in these areas. The article concludes by considering policy implications, and recommends expanding foreclosure mitigation and prevention strategies to nonurban places.     

Rural land use bifurcation in the urban-rural gradient

The classic urban-rural gradient concept assumes a decline in land use intensity from an intensively developed urban core outward to residential suburbs, culminating in lightly developed rural areas. The concept provides a common framework directing urban socio-ecological research. Given that rural land use includes woodlands and croplands, and croplands appear as ecologically depauperate as urban lands, we investigated land-use patterns along urban-rural gradients for 30 large metropolitan areas in the eastern United States. We predicted a bifurcation at the rural end of the gradient between woodland and cropland land use that does not correspond with human population density (expected to be relatively low in rural areas regardless of land use type). Our data indicated that ‘rural’ was a poor substitute for ‘natural’ as the rural end of the gradients bifurcated at the rural end between woodland and cropland – croplands being demonstratively poor ecological habitats. Indeed, we found that when defined by habitat quality, the habitat known to be biotically homogenized (urban and cropland) remained steady along the urban-rural gradient. Our results do not undermine the utility of the urban-rural gradient framework, but do suggest that the gradient and/or human population density do not necessarily indicate shifts in habitat quality.     

Animal behavior in urban ecosystems: Modifications due to human-induced stress

Wildlife-human interactions are increasing in prevalence as urban sprawl continues to encroach into rural areas. Once considered to be unsuitable habitat for most wildlife species, urban/suburban areas now host an array of wildlife populations, many of which were previously restricted to rural or pristine habitats. The presence of some wildlife species in close proximity to dense human populations can create conflict, forcing resource managers to address issues relating to urban wildlife. However, evidence suggests that wildlife residing in urban areas may not exhibit the same life history traits as their rural counterparts because of adaptation to human-induced stresses. This creates difficulty for biologists or managers that must address problems associated with urban wildlife. Population control or mitigation efforts aimed at urban wildlife require detailed knowledge of the habits of wildlife populations in urban areas. This paper describes the history of wildlife in urban areas, provides examples of wildlife populations that have modified their behavior as an adaptation to urban stresses, and discusses the challenges that resource managers face when dealing with urban wildlife.     

Urbanicity Moderates Associations between Family Income and Adolescent Academic Achievement

Research has shown that family income's relations to early childhood achievement is stronger in large inner cities and weaker in less urbanized areas. Research has not yet considered whether links between family income and achievement in adolescence differ across the urban to rural landscape. Using nationally representative data from the Early Childhood Longitudinal Study, Kindergarten Class of 1998–1999 (N ≈ 9,350), this study examines differences in family income's links with eighth‐grade achievement across large urban, small urban, suburban, and rural communities. The point at which income‐achievement links plateau occurs later in the income distribution in less urbanized areas. The magnitude of the association between family income and reading and science skills also differs across the urban‐rural continuum, such that family income has stronger relations to reading and science achievement in urban cities and weaker links in suburban and rural communities.     

Community Context and Theories of Deviant Behavior: An Examination of Social Learning and Social Bonding Theories

The social learning and social bonding theories of deviant behavior were investigated in four community contexts: farm, rural-nonfarm, suburban, and urban. The mean differences across these contexts on pertinant variables did not form a continuum from rural to urban. Rather, the farm and suburban areas were similar, and the rural-nonfarm and urban areas were more alike than either of the other two contexts. A number of the social bonding variables interacted with community context, but no systematic pattern was observed. Social learning variables did not interact with context. Rather, the different level of these variables appeared to account for the variance in deviant behavior.     

Short- and long-term effects of site factors on net N-mineralization and nitrification rates along an urban-rural gradient

Long- and short-term effects of urban site factors on net N-mineralization and nitrification rates were investigated in oak stands along an urban-rural land-use transect in the New York City metropolitan area. We used reciprocal transplants of undisturbed soil cores between urban and rural forests to determine the relative importance of long-term effects (mor vs. mull soils, quality of soil organic matter, and deposition of N) vs. short-term effects (soil temperature) of urban factors in controlling field N-transformation rates along the gradient. In addition, undisturbed soil cores from surface (A, Oe horizons) and subsurface (B horizon) soil were collected from urban, suburban, and rural stands and allowed to incubate in these respective sites to compare the net effect of all urban factors with transplanted-core results. The transplant experiment revealed that soil type (long-term) affected net N-mineralization and nitrification rates. Urban soils nitrified nearly 6.3 and 5.4 times more than rural soils incubating in urban and rural stands, respectively (p = 0.003 and p = 0.002, respectively). Similarly, in rural stands total accumulation of inorganic N was 87% higher in urban than in rural soils, whereas in urban stands, urban soils mineralized 83% more N than rural soils (p = 0.043 and 0.08, respectively). Comparing soils incubating in their native locations, urban soils incubating in urban stands mineralized more than 2.5 times the amount of N than rural soils incubating in the rural stands (p = 0.019). By contrast, urban soils incubating in urban stands exhibited a 8-fold increase in nitrification over rural soils incubating in rural stands (p = 0.008). As with the transplanted cores, the urban and suburban environments had a positive effect on net rates of N-mineralization and nitrification in both surface and subsurface layers of soil. The surface layer of suburban and urban stands had a 3- and 2.3-fold higher accumulation of net inorganic N than rural stands (ANOVA, p = 0.05). Similarly, in the subsurface layer both urban and suburban stands had 2.6-fold higher net N-mineralization rate than rural stands (ANOVA, p = 0.01). Along this urban-rural gradient, soils in oak stands exhibit higher net nitrification and, to a lesser extent, net N-mineralization rates in urban and suburban stands than in rural stands. Results from the transplant experiment and in situ measurements of surface and subsurface soil indicate that long-term effects (mor vs. mull soils, N deposition) contribute to the higher N-transformation rates in urban and suburban stands. As a result of these effects, urban and suburban stands have the potential for higher losses of N than rural stands.     

The influence of anthropogenic resources on multi-scale habitat selection by raccoons

With the continuing spread of urban areas, gaining a greater understanding of the effect of human presence on wildlife species is essential for wildlife managers. We determined the influence of anthropogenic resources on home range size and habitat selection of raccoons (Procyon lotor) during summer (June–August) 1996–2000 for 120 raccoons at three sites exposed to varying levels of urbanization and anthropogenic resources, specifically food. Home range estimates were larger (P < 0.05) at the rural site than the suburban and urban sites for both genders. We used compositional analysis to examine raccoon habitat selection at the second-order home range, second-order core area, and third-order home range scales. Woodland was consistently a highly-selected habitat type for both sexes at every spatial scale. Relative to other habitat types, habitat associated with human-related food (human use areas) was selected most often at the urban site, intermediately at the suburban site, and not selected at the rural site. Spatial scale also affected habitat selection. Human use areas were preferentially selected at the second- and third-order level at the urban site, third-order level only at the suburban site, and at neither level at the rural site. Additionally, intersexual differences in habitat selection were reduced at the urban site, with both sexes preferentially selecting for human use areas as well as woodland habitat. Smaller home ranges in urbanized environments are often attributed to the abundant and concentrated anthropogenic resources associated with human activity, but with little empirical support. Our habitat selection analyses followed our predictions that raccoon foraging is strongly influenced by the artificial distribution and abundance of human-related food. Male and female raccoons in urban areas reduce their foraging patterns and focus their foraging activity on anthropogenic foods.     

Effective support for lesbians in rural communities: the role of psychotherapy

Most research involving lesbians has been conducted using urban or suburban samples. However, the challenges lesbians face in their rural communities differ from those encountered by lesbians in urban areas. Lesbians in rural areas face potential isolation due to the lack of a visible gay community, an overall lack of services and resources, and an often heightened experience of stigma. Rural areas tend to have a more conservative political climate with an emphasis on fundamentalist religious beliefs. Due to such strong heteronormist pressures, lesbians who decide to come out to their rural communities often face justifiable fears surrounding possible discrimination from employers, religious organizations, schools, and even their friends and family members. Therapists who work with lesbians in rural areas should be prepared to help their clients face and successfully deal with many unique challenges.     

Towards a theory of the American rural residential land market

Since the late 1960s there has been a notable acceleration in America in the demand for rural residential land within commuting range of urban and suburban employment and service opportunities. American rural residential households do not seem to purchase acreage tracts primarily for their ‘productive’, or resource value, however. Instead, they purchase rural land for its ‘consumptive’ or residential value, as its value is primarily derived from the bundle of residential attributes associated with it. Over time, rural land within commuting range of metropolitan areas becomes underproductive and idled — a situation which precedes urban sprawl. Rural residential development has thus become a focus of debate on the effects and inefficiencies associated with urban sprawl. Yet, not enough is known about the nature of the rural residential land market. It is argued that American rural residential households are different from their suburban and urban counterparts for at least three reasons. First, they are distinguishable for their pursuit of self-sufficiency, self-expression, and the cultural status that a rural residential lifestyle offers. Second, they seek low cost rural jurisdictions in order to afford more housing and land than they could afford in higher cost urban and suburban locations. Third, they value distance from the city center colinearly with externalities such as pollution, crime, overcrowding, and noise associated with central city areas. In the latter sense, American rural residential households value land more highly the farther away it is from the city center, but discount land value the farther away it is from the boundary of urban development. In light of these considerations, this paper (a) reviews the literature describing the motivations of American rural residential households, (b) poses a theory of the American rural residential land market, (c) applies the theory to a case study, and (d) offers implications of the theory to planning efforts aimed at preserving resource land and containing urban sprawl.     

Urban ecosystem management: bringing science and policy together

The U.S. Department of Agriculture has many programs that directly affect urban ecosystems, and many more, such as the collection, interpretation, and dissemination of natural resource data, that affect rural and urban areas alike. The policy challenge is to bring the vast scientific resources of the Department to the urban decision maker in an effective manner. This requires teamwork on the part of federal agencies, which can be greatly improved by innovative programs such as the Urban Resources Partnership. In spite of the progress being made, there are many challenges and opportunities ahead as national policymakers seek to bring science and policy together in ways that assist local leaders and citizens in improving environmental quality and the quality of life in urban and suburban areas.     

Spatial patterns of female Ailanthus altissima across an urban-to-rural land use gradient

Ailanthus altissima is an invasive, dioecious deciduous tree common at the interface between urban and rural areas in the mid-Atlantic region, U.S.A. To examine spatial patterns of abundance and associations with land use type, we mapped all mature female trees in nine 89.5 ha plots (805.5 ha total area) across a typical urban-to-rural land use gradient using aerial images obtained via remote sensing supplemented by detailed ground referencing. Rural plots were dominated by forest and had the lowest density of mature females (0.007 females ha⁻¹); urban and suburban plots did not differ significantly in mean density (0.37 females ha⁻¹ vs. 0.34 females ha⁻¹, respectively). Individuals in urban plots were more evenly distributed, but were not associated with a wider variety of land uses and were closer to roads or openings than those in suburban plots. Given less available habitat per unit area in urban than in suburban environments, these patterns suggest that Ailanthus fits the profile of an invasive species that may be proliferating outward from urban centers. With continued disturbances associated with development in the suburban areas, and timber harvesting in the rural areas, further spread of Ailanthus seems likely.     

A culture of whiteness: How integration failed in cities,suburbs, and small towns

As America's neighborhoods have become more racially diverse in the last half century, are these shared spaces fulfilling the “promise of integration”? In this study, I review the literature on desegregation as it occurs in urban, suburban, and rural places, illuminating how a culture of whiteness works in each of these types of places to reproduce racial domination. The literature on multiethnic urban areas demonstrates how a culture of whiteness reframes gentrification as ‘revitalization’ and nostalgia, which result in social control and cultural displacement of non-white residents. In suburban places, I draw out the ways a culture of whiteness is expressed as ‘niceness’ and ‘governmentality’, resulting in symbolic exclusion and forced assimilation of people of color. Finally, in rural places, a culture of whiteness uses narratives of ‘pollution’ and ‘parasitism’ to understand often low-income migrants of color, which renders them invisible and reproduces their structural disadvantage in the community. Revealing the subtle and obscure mechanisms through which a culture of whiteness reproduces racial domination in diverse places ultimately provides the key to their undoing and opens the door to the promise of integration.     

Effect of urbanization on surface water chemistry in south-central Texas

The use of state factors can adequately describe the biogeochemistry and geochemistry of relatively undisturbed surface waters. Watersheds with increasing proportions of urban and suburban land use, particularly in sub-tropical, semi-arid and arid urban areas, that utilize irrigation for turfgrass and landscaping may have a low flow urban signature that relates to the source water used by municipal water suppliers. We examined thirteen watersheds; four with waste water treatment plants (24–67% urbanization), four rural (< 30% urbanization) and five urban (> 30% urbanization) in a humid sub-tropical oak savannah in south-central Texas. Three of our urban and one of our rural watersheds displayed the signature of municipal tap water. Three out of four watersheds with waste water treatment plants displayed the signature of treated sewage effluent. We suggest as a result of this study that the chemistry of municipal tap water particularly that with high sodium and bicarbonate, used in urban watersheds for irrigating turfgrass and landscapes may have detrimental effects on base flow stream water quality after it has interacted with watershed soils.     

上海郊区农村社会问题调研报告

通过对上海郊区农村调研,农村社会发展呈现出人口老龄化、外来人口日益增多、社会保障不足、基层组织在乡村事务发展中作用弱化等四大社会问题。面对当前郊区农村出现的社会问题,上海要从建设国际大都市的高度和要求出发,立足未来上海郊区农村发展目标,在养老服务、外来人口管理、农业现代化、社会保障等方面,合理、有序地推动市郊的城市化进程。