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      Reconnecting Cities to the Biosphere: Stewardship of Green Infrastructure and Urban Ecosystem Services

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          Abstract

          Within-city green infrastructure can offer opportunities and new contexts for people to become stewards of ecosystem services. We analyze cities as social–ecological systems, synthesize the literature, and provide examples from more than 15 years of research in the Stockholm urban region, Sweden. The social–ecological approach spans from investigating ecosystem properties to the social frameworks and personal values that drive and shape human interactions with nature. Key findings demonstrate that urban ecosystem services are generated by social–ecological systems and that local stewards are critically important. However, land-use planning and management seldom account for their role in the generation of urban ecosystem services. While the small scale patchwork of land uses in cities stimulates intense interactions across borders much focus is still on individual patches. The results highlight the importance and complexity of stewardship of urban biodiversity and ecosystem services and of the planning and governance of urban green infrastructure.

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          The online version of this article (doi:10.1007/s13280-014-0506-y) contains supplementary material, which is available to authorized users.

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          Promoting ecosystem and human health in urban areas using Green Infrastructure: A literature review

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            Novel ecosystems: theoretical and management aspects of the new ecological world order

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              Is Open Access

              A Meta-Analysis of Global Urban Land Expansion

              The conversion of Earth's land surface to urban uses is one of the most irreversible human impacts on the global biosphere. It drives the loss of farmland, affects local climate, fragments habitats, and threatens biodiversity. Here we present a meta-analysis of 326 studies that have used remotely sensed images to map urban land conversion. We report a worldwide observed increase in urban land area of 58,000 km2 from 1970 to 2000. India, China, and Africa have experienced the highest rates of urban land expansion, and the largest change in total urban extent has occurred in North America. Across all regions and for all three decades, urban land expansion rates are higher than or equal to urban population growth rates, suggesting that urban growth is becoming more expansive than compact. Annual growth in GDP per capita drives approximately half of the observed urban land expansion in China but only moderately affects urban expansion in India and Africa, where urban land expansion is driven more by urban population growth. In high income countries, rates of urban land expansion are slower and increasingly related to GDP growth. However, in North America, population growth contributes more to urban expansion than it does in Europe. Much of the observed variation in urban expansion was not captured by either population, GDP, or other variables in the model. This suggests that contemporary urban expansion is related to a variety of factors difficult to observe comprehensively at the global level, including international capital flows, the informal economy, land use policy, and generalized transport costs. Using the results from the global model, we develop forecasts for new urban land cover using SRES Scenarios. Our results show that by 2030, global urban land cover will increase between 430,000 km2 and 12,568,000 km2, with an estimate of 1,527,000 km2 more likely.
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                Author and article information

                Contributors
                erik.andersson@su.se
                stephan.barthel@stockholmresilience.su.se
                sarab@stockholmresilience.su.se
                johanc@beijer.kva.se
                thomas.elmqvist@stockholmresilience.su.se
                carl.folke@beijer.kva.se
                asa.gren@beijer.kva.se
                Journal
                Ambio
                Ambio
                Ambio
                Springer Netherlands (Dordrecht )
                0044-7447
                1654-7209
                17 April 2014
                17 April 2014
                May 2014
                : 43
                : 4
                : 445-453
                Affiliations
                [ ]Stockholm Resilience Centre, Stockholm University, 10691 Stockholm, Sweden
                [ ]The Beijer Institute, Royal Swedish Academy of Sciences, PO Box 50005, 10405 Stockholm, Sweden
                Article
                506
                10.1007/s13280-014-0506-y
                3989518
                24740616
                b2764ef7-621c-4ee0-b8bb-0546b202759a
                © The Author(s) 2014

                Open AccessThis article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.

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                © Royal Swedish Academy of Sciences 2014

                Sociology
                biodiversity,ecosystem services,property rights,stewardship,urban ecology,urban social–ecological systems

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