معرفی
Dr. Dan Johnson is an Associate Professor at the University of Georgia (UGA), affiliated with the Warnell School of Forestry and Natural Resources. His research focuses on tree physiology and forest ecology, particularly investigating plant hydraulic systems, fire impacts, and drought resilience. He holds a Ph.D. in Plant Physiological Ecology from Wake Forest University, an M.S. in Forestry from NC State University, and a B.S. in Biochemistry from NC State University.
Research Interests:
- Plant hydraulics and xylem embolism
- Fire-induced tree mortality mechanisms
- Climate change effects on forest ecosystems
- Root-water interactions under stress conditions
Recent work highlights innovative studies on conifer mortality drivers, tropical forest hydraulic vulnerability, and longleaf pine resilience to fire/drought combinations. His lab (Tree Physiological Ecology Lab) employs advanced techniques like deuterium tracing and thermal remote sensing to understand water dynamics in trees.
Grants & Collaborations:
- NSF-funded studies on tree water storage functions
- Multi-institutional projects on fire-ecophysiology
- Urban Trees Ecophysiology Network (UTEN) leadership
Key contributions include redefining fire mortality mechanisms through phloem study and identifying critical thresholds for catastrophic hydraulic failure in plants.
