| Image |
Descriptor |
Description |
Photographer |
| 1428003 |
Foliage |
Early symptoms of photo oxidant injury near Mexico City on older foliage. |
William M. Ciesla |
| 1428004 |
Foliage |
Advanced symptoms of photo oxident injury on sacred fir near Mexico City consisting of loss of older foliage and browning of one year old foliage. |
William M. Ciesla |
| 1428005 |
Foliage |
Healthy foliage, near Mexico City |
William M. Ciesla |
| 1428020 |
Foliage |
Close up of healthy foliage |
William M. Ciesla |
| 1428008 |
Harvesting |
Timber salvage operation underway, near Mexico City in fir forest damaged by photo oxidant pollution. |
William M. Ciesla |
| 1428001 |
Product |
"Campesino" with sprigs of sacred fir. These are commonly used to decorate homes and churches during religious festivals. Near Toluca. |
William M. Ciesla |
| 1428002 |
Stand |
Dense forest of Abies religiousa, near Mexico City. Photo was taken in 1972. Note relatively flat tops of tree crowns. This may be an early symptom of photoxidant injury. |
William M. Ciesla |
| 1428009 |
Stand |
Aerial view of tree mortality caused by a combination of bark beetles and photo oxidant injury, near Mexico City. |
William M. Ciesla |
| 1428010 |
Stand |
Aerial view of tree mortality caused by a combination of bark beetles and photo oxidant pollution, near Mexico City. |
William M. Ciesla |
| 1428006 |
Stand |
Sacred fir forest in fog, near Mexico City. |
William M. Ciesla |
| 1428007 |
Stand |
Sacred fir forest, near Mexico City. Thin crowns are indicative of decline due to photo oxidant injury |
William M. Ciesla |
