Phenotypic characteristics, their description, and the category or unit of measurement recorded for each Eucalyptus leucoxylon tree assessed.
| Characteristic | Description | Categories/units |
|---|---|---|
| Position | Location of tree in relation to road | 1. Median strip (running down the centre of the road) |
| 2. Road verge (area between private property and the road) | ||
| Road type | Estimation of traffic flow at each location | 1. Local traffic (i.e., cul-de-sac, no through roads) |
| 2. Minor street | ||
| 3. Busy road (connector roads) | ||
| 4. Highway or freeway (high-traffic flow) | ||
| Ground surface | The percentage of vegetative cover directly surrounding tree | 1. 0% coverage (bare ground) |
| 2. 1% to 20% coverage | ||
| 3. 21% to 40% coverage | ||
| 4. 41% to 60% coverage | ||
| 5. 61% to 80% coverage | ||
| 6. > 81% coverage | ||
| Compaction | Topsoil depth (1 m from tree base) | (mm) |
| Soil compaction (independent of depth) | 1. Very soft | |
| 2. Soft | ||
| 3. Medium | ||
| 4. Firm | ||
| 5. Impenetrable | ||
| Root damage | Damage to surrounding infrastructure that may have been caused by tree roots | 1. No damage |
| 2. Minor lifting of ground | ||
| 3. Minor lifting and cracks to infrastructure | ||
| 4. Major cracks and severe damage | ||
| Utility lines | Is the tree planted below power lines? | Yes/no |
| Is there any interaction between utility lines and tree canopy? | Yes/no | |
| Competition | Is there any competition between the tree and any surrounding object? If there is any direct competition, what is the tree interacting with? | Yes/no |
| 1. Another tree (canopy) | ||
| 2. Another tree (branches) | ||
| 3. Building | ||
| 4. Power pole | ||
| 5. Other | ||
| Soil profile | Is there any change in the soil profile around the base of the tree? (Excavation or fill) | 1. No |
| 2. Ground surface is slightly raised | ||
| 3. Ground surface raised significantly | ||
| 4. Minor excavation | ||
| 5. Major excavation |