Multiscale approach to biodiversity conservation: Chicago as a case study

Biodiversity loss is a major global concern, strictly connected to heterogeneous phenomena occurring at various spatial and temporal levels. A multiscale approach to biodiversity conservation is therefore crucial to better understand and manage ecological dynamics and processes.Among the many cities that are worldwide adopting biodiversity-aimed policies, Chicago stands for its forward-looking approach to environmental conservation, whose antecedents can be found at the turn of the 20th century, when the Forest Preserves of Cook County were established. The institution of this system of protected sites became the framework for the foundation of the regional alliance Chicago Wilderness in 1996, aimed at implementing the quality of delicate ecosystems and conservation areas. In 1999 the alliance produced an innovative document for that time: the Biodiversity Recovery Plan (BRP) for the greater Chicago region. It was followed in 2004 by its spatial representation, the Green Infrastructure Vision, that identified priority areas to be protected, restored, and connected.In order to translate the BRP regional goals at the urban level, in 2006 the City of Chicago developed its first Nature and Wildlife plan (updated in 2011) to preserve and restore habitats within the city. Proposing the experience of Chicago as a best practice, the paper addresses the complex system of tools adopted to tackle the loss of biological diversity from regional to municipal level. Through the analysis of three contemporary landscape architecture projects implemented in Chicago, the paper intends to highlight the productive and mutual influence of landscape planning and design in biodiversity conservation.