Joseph O'Brien's Images
Title: Plant PathologistOrganization: USDA Forest Service
Unit: Forest Health Protection
Country: United States
Joe is a plant pathologist with the U.S. Forest Service in St. Paul, Minnesota. in addition to photography, his major interests include tree diseases in forests, woodlands and urban areas, hazard tree identification and mitigation, and mycology. Joe is a graduate of the University of Michigan (B.S. Forestry and M.S. Forest Pathology) and the University of Minnesota (Ph.D. Plant Pathology), and currently works at the Northern Research Station on the University of Minnesota's St. Paul campus. |
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Deadwood(X)
| 15 Images of 5 Subjects | View Subject List | View Image Details | View Thumbnails |
| Image | Subject Name | Scientific Name | Description |
|---|---|---|---|
| 5053054 | risk tree | Large tree with multiple defects, including cracks, decay, dead branches. | |
| 5044077 | deadwood and snags | Large deaying branch high in a tree. | |
| 5044018 | deadwood and snags | Dead oak top (tree hazard) | |
| 5038036 | cracks or splits | Dead top with major split. | |
| 5044019 | deadwood and snags | Large dead branches | |
| 5050075 | deadwood and snags | Large dead branch in upper crown. | |
| 5050076 | deadwood and snags | Dead branch in upper crown. | |
| 5050077 | deadwood and snags | Broken, dead branch. | |
| 5298060 | deadwood and snags | Snag with decay and large hole. | |
| 5298063 | deadwood and snags | Large tree with dead wood in crown, multiple burls and decay. Tom Eiber and Peggy Sand in image. | |
| 5038005 | deadwood and snags | Dead eastern white pine with split top. | |
| 5034082 | dieback | Small branch dieback in red maple in an urban landscape | |
| 5032067 | yellow birch decline | Dieback in the crowns of yellow birch, instigated by drought. | |
| 5033067 | dieback | Moderate dieback in the crown of a bur oak. | |
| 1397068 | deadwood and snags | hazard tree near swing; note the sloughing bark |
