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Green and blue spaces, together with other land use changes are determining factors of habitat fragmentation, biodiversity loss and decline of ecosystem services in urbanized areas (Adriaensen et al., 2003; Collinge, 1996; Kong et al., 2010; Teng et al., 2011). In attempt to tackle the issue, network connectivity is regarded as a suitable approach from an ecological (CookVan Lier, 1994) and social perspective (Teng et al., 2011). Landscape-scale connectivity is normally built on a ‘patch-corridor-matrix’ model to describe structural or functional continuity in a spatial and time configuration (FormanGodron, 1986). A graph-theoretic approach therefore can provide an operable way of framing and evaluating features of connectivity (Bunn et al., 2000; MinorUrban, 2008; Zetterberg et al., 2010).

In this paper, the concept of ‘green networks’ is expanded into a concrete analytical framework for studying green and blue linkages, as well as social and ecological connections and integrations. We selected Stockholm, capital city of Sweden and green capital of Europe 2010, as an example of a city with ample urban green spaces, but also with challenges in terms of green space fragmentation. The main research questions of this paper are: how can the green network concept provide a comprehensive framework for analysing landscape and habitat fragmentation, and how current city green-blue spaces planning can and design benefit from it.



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