“…We evaluated the relevance of the urban context using a qualitative scale of three grades A-C: (A) null or low relevance -in this case the study did not contain urban areas or they were insignificant such as the case of Grand County Colorado which has a population of only 11,000 inhabitants (Brown et al, 2012); (B) medium relevance: urban areas were more prevalent but not predominant, like in the case of Flanders in Belgium which is an area with significant levels of urbanisation but also has vast rural areas ; (C) high relevance: urban areas were predominant within the study area, like in the case of specific case study of cities like Tamar river estuary (Davis and Kidd, 2012) or the four cities in Florida (Escobedo et al, 2014). Table 2 Combination of values of criteria of "communicability" and "relevance to urban context".…”