One straight forward way to measure it is the history/nature of conversations and interactions people have had with the SymbioTotem. Taking the Rio Sagrado avatar as its first instance, at a high level the log data tells me that over 70 people, speaking 3 different languages have engaged with it in conversations of varied length and nature. And this can get more granular with proper analysis.

Another possible way to measure the impact of the SymbioTotem is how much it serves to inform people about a region's biodiverse, which can be done via surveys prior/after interaction with the installation.

And there are also qualitative ways to measure such impact. For instance, with the public facing experiences we conduct, which have informed the creation of the SymbioTotem, we have heard people saying that they have had worldview completely shaken after listening to the sounds of a plant, for instance. Or that they now understand why their grandmas talk to plants. Systematically getting such feedback and measuring impact from that would just be a matter of proper resource allocation.