Fig. 3. The social network of the Ecopark movement consists of 62 organizations perceived as active in the protection of the National Urban Park by at least two respondents. They are divided in a Main Component (47 nodes), Gardening Component (4), and several unconnected Isolates (11). Also indicated is the Boating Cluster. The network is generally sparse and of low density; of the 2162 possible links, only 190 were realized in the valued network, whereas 119 were in the symmetrical network. Distances were nonetheless short, with an average of 2.33, and a maximum distance of 5 in the symmetrical network (of the Main Component).