Urbanisation lowers great tit Parus major breeding success at multiple spatial scales

While numerous studies have reported negative effects of urbanisation on birds, few have examined the role of urban scale in influencing breeding success. Furthermore, many studies have relied on qualitative rather than quantitative assessments of urbanisation. This study sought to address these issues by testing the effects of urbanisation, measured at two spatial scales, on the breeding success of great tits Parus major. A nested study design, incorporating over 400 nestboxes, was used in study sites across northern Belgium with a priori quantified degrees of urbanisation at both local and regional scales. All measured breeding parameters were found to vary at one or both spatial scales of urbanisation; in more urbanised areas great tits displayed advanced laying dates but lower breeding success compared to rural areas, with smaller clutch sizes, lower nestling masses and fewer fledglings per egg. Importantly, urbanisation effects were not limited to big cities as birds breeding in gardens or parks in small towns also had comparatively low success. We found that both regional- and local-scale urbanisation had consistent significant effects on laying date, clutch size and nestling mass, while the number of fledglings per egg was negatively influenced by local-scale urbanisation only. Results of this study therefore highlight the importance of utilising multiple spatial scales in analysing urbanisation effects, as well as the potential negative impact of local urbanisation on breeding success. This calls for further investigation into mechanisms driving urbanisation effects and how these may vary at different scales

Understanding the origins and pace of Africa’s urban transition

In this paper the author argues that urbanisation should be understood as a global historical process driven primarily by population dynamics stimulated by technological and institutional change. In particular, disease control and expanded access to surplus energy supplies are necessary and sufficient conditions for urbanisation to occur given historical evidence of an inherent human propensity to agglomerate. Economic development, which has traditionally been viewed as the primary driving force behind urbanisation, can accelerate the process but is not a necessary condition for it to occur. Informed by this historically-grounded theory of urbanisation, a range of qualitative and quantitative evidence is used to explain the stylised facts of sub-Saharan Africa's urban transition, namely the late onset of urbanisation in Africa vis-a-vis other major world regions, the widely noted but inadequately explained phenomenon of 'urbanisation without growth' observed in Africa in the 1980s and 1990s, and the historically unprecedented rates of urban population growth seen in the region throughout the late twentieth century

The Role of the Inhabitants of Łódź in the Urbanisation of its Surrounding Area

This article describes the urbanisation process within the recreational region surrounding Łódź. After an introduction to theoretical issues, the topic will be the ongoing changes, their stages, and effects on various planes of this urbanisation. The emphasis is put on showing the characteristics and scale of the process, its causes and social features. The paper concludes by demonstrating the dominating influence of the inhabitants of Łódź on urbanisation processes caused by their tourism and recreational activity in this area

REGIONAL INCOME INEQUALITY AND URBANISATION TRENDS IN CHINA: 1978-2005

A long-standing economic literature has delivered rich empirical evidence on the relationship between economic growth and income inequality or urbanisation, since Simon Kuznets’ pioneering work on the inverted U curve hypothesis. This paper explores the relationship between urban inequality and urbanisation trends in China from 1978 to 2005, a period that corresponds to the economic opening up of the country to the market economy. One of the main issues, here, is not only to test the correlation between regional income inequality and urbanisation trends, but also to highlight the neighbouring effects of this correlation, mainly through the use of some new spatial analysis tools. This paper delivers two conclusions: firstly, neighbouring effects are stronger when it comes to income inequality than urbanisation; secondly, a distortion in development patterns, between northern and southern coastal China appears: in the first one, growth effects and urbanisation process spread all over the different provinces, while in the second one, Guangdong appears as a regional economic centre.INCOME INEQUALITY, URBANISATION, CHINA, SPATIAL

Elementary processes governing the evolution of road networks

Urbanisation is a fundamental phenomenon whose quantitative characterisation is still inadequate. We report here the empirical analysis of a unique data set regarding almost 200 years of evolution of the road network in a large area located north of Milan (Italy). We find that urbanisation is characterised by the homogenisation of cell shapes, and by the stability throughout time of high-centrality roads which constitute the backbone of the urban structure, confirming the importance of historical paths. We show quantitatively that the growth of the network is governed by two elementary processes: (i) `densification', corresponding to an increase in the local density of roads around existing urban centres and (ii) `exploration', whereby new roads trigger the spatial evolution of the urbanisation front. The empirical identification of such simple elementary mechanisms suggests the existence of general, simple properties of urbanisation and opens new directions for its modelling and quantitative description.Comment: 10 pages, 6 figure

Urbanisation as a Threat or Opportunity in the Promotion of Human Wellbeing

It is possible to present a credible picture of urbanisation as one of the greatest threats to human health, wellbeing and development, although this paper will argue that to do so requires focusing on a limited set of cities. There is a stronger evidence base on cities and urbanisation underpinning good health, fulfilment of civil rights, democracy and freedom from deprivation, although with important exceptions. It is possible to present urbanisation as the most serious driver of human-induced climate change (and of most other kinds of ecological damage). But cities also have the potential to be places where high living standards can be delinked from unsustainable ecological footprints and high greenhouse gas (GHG) emissions (and there are some cities that demonstrate this). Of course, a very different set of urban centres get highlighted, depending on which of these points one wants to substantiate. What this paper seeks to do is to highlight both the threats and the opportunities posed by urbanisation

The Process of Urbanisation in Pakistan, 1951–81

The current level of urbanisation in Pakistan, approximately 33 percent in 1998, is not high by global standards. But it is commonly linked with unemployment, underemployment, shortage of housing, transport and other infrastructure like water supply and sewerage. Compared to other areas of population dynamics, such as fertility and mortality, studies in the field of urbanisation and internal migration in Pakistan are rather limited. During the last three decades hardly half a dozen studies could be added in the field of urbanisation. These studies are primarily based on data generated by the different censuses. After the 1979 Population Labour Force and Migration (PLM) Survey, no nationally representative survey addressing the issue of urbanisation and internal migration could be carried out. Even regional studies could not be conducted during the last two decades. The present study is designed to utilise the 1998 census data to investigate urban population growth, pace (or tempo) of urbanisation and components of urban growth for the period of 1981–98.

Problems and Prospects of Urban Environmental Management in Pakistan

Discussions on environmental conditions often assume that urbanisation contributes to the degradation of the environment. However, urbanisation per se is not detrimental to the environment. Concentrations of population and economic activities through urbanisation offer opportunities in providing environmental infrastructure and health services costeffectively, because of economies of scale. It also provides opportunities to effectively internalise environmental costs; because concentration of economic activities reduces user charges and costs of tax collection, enforcement, and wastes management, which are essential to environmental protection. Nevertheless, while providing opportunities the process of urbanisation also generates environmental pressures. A nation that is unable to utilise the opportunities and alleviate the pressures through integrated environmental, economic and physical planning finds that mismanaged urbanisation can pose enormous environmental and economic problems that become increasingly difficult to solve with time. Unfortunately, Pakistan is one of the countries which have not managed the process of urbanisation effectively. This paper, after tracing the urbanisation trends in Pakistan, discusses the existing and emerging environmental impacts and risks. The country is at the stage of risk transition where modern risks caused by industrial and traffic pollution, such as chemicals, heavy metals and noise, combine with the traditional risks such as bacteriological and parasitic infections caused by inadequate infrastructure facilities particularly water supply and sanitation. The paper also analyses the responses to urban environmental problems in terms of approaches to sustainable urban development. Finally, it outlines the holistic policy directions to environmentally sound and sustainable urban development, including institutional, regulatory, economic and participatory measures.

Urbanisation and health in China.

China has seen the largest human migration in history, and the country's rapid urbanisation has important consequences for public health. A provincial analysis of its urbanisation trends shows shifting and accelerating rural-to-urban migration across the country and accompanying rapid increases in city size and population. The growing disease burden in urban areas attributable to nutrition and lifestyle choices is a major public health challenge, as are troubling disparities in health-care access, vaccination coverage, and accidents and injuries in China's rural-to-urban migrant population. Urban environmental quality, including air and water pollution, contributes to disease both in urban and in rural areas, and traffic-related accidents pose a major public health threat as the country becomes increasingly motorised. To address the health challenges and maximise the benefits that accompany this rapid urbanisation, innovative health policies focused on the needs of migrants and research that could close knowledge gaps on urban population exposures are needed

Cities in the Developing World

Rapid urbanisation is a major feature of developing countries. Some 2 billion more people are likely to become city residents in the next 30 years, yet urbanisation has received little attention in the modern development economics literature. This paper reviews theoretical and empirical work on the determinants and effects of urbanisation. This suggests that there are substantial productivity benefits from cities, although unregulated outcomes may well lead to excessive primacy as externalities and coordination failures inhibit decentralisation of economic activity. Policy should operate both by identifying and addressing these market failures, and by seeking to remove institutional obstacles to decentralisation.Urbanisation, economic development