Table 1.
Summary of sampling sites with number of samples and participants, spatial, and demographic variables. The reported area is the official urban perimeter without considering suburbs. Total samples indicate the total number of recordings per city, number of participants in parenthesis. Selected samples refer to the final number of samples used in the analysis, number of participants in parenthesis. The average number of trees is the count of urban trees within a buffer of 200 m centered at each participant's location. The vegetation was quantified using the Normalized difference vegetation index (NDVI); low values indicate less vegetation and higher vegetation more vigorous. Data sources detailed in Table A2.
| Urban intensity | City | Urban perimeter area (km2) | Population (millions) | Elevation (m) | Total samples (participants) | Selected samples (participants) | Avg. number of trees (sd) | Avg. NDVI value (sd) |
|---|---|---|---|---|---|---|---|---|
| High | Bogotá | 1587 | 7.2 | 2600 | 1190 (56) | 711 (21) | 334.3 (426.1) | 2681 (858.6) |
| Intermediate | Cali | 619 | 1.8 | 1018 | 336 (22) | 181 (7) | 180.7 (244.6) | 4052 (1271.7) |
| Intermediate | Medellín | 380 | 2.4 | 1495 | 968 (37) | 191 (10) | 285.2 (692.1) | 4218 (1346.0) |
| Low | Other (19 small cities) |
46–2393 | <0.6 | 15–2758 | 2062 (87) | 826 (24) | NA | NA |