Patricia (Trish) A. Holden

Patricia (Trish) A. Holden, Ph.D. P.E., Professor, Bren School of Environmental Science & Management Director, UCSB Natural Reserve System

Contact Phone

(805) 893-3195

Office Location

Bren Hall 3508
Bren Hall 2318 (Lab)


Soil Microbiology, Civil and Environmental Engineering, and Microbiological Coastal Water Quality

Faculty in Bren School of Environmental Science and Management


  • Ph.D., Soil Microbiology, UC Berkeley
  • M.E., Civil & Environmental Engineering, UC Berkeley
  • M.S., Civil Engineering, Purdue University
  • B.S., Civil Engineering, University of Tennessee


Dr. Patricia A. Holden is a professor of environmental microbiology in the Bren School of Environmental Science & Management, and also director of the UCSB Natural Reserve System. She has a background in civil/environmental engineering, and is a researcher with the UC Center for Environmental Implications of Nanotechnology, where her group studies bacteria as agents of environmental restoration and degradation.


For more information regarding Dr. Holden's research, please visit the Holden Lab webpage.


Holden's research cross-cuts these fields, with current projects regarding the interactive effects of soil, water, and nutrients on deep-soil bacterial processes, bacterial interactions with engineered nanomaterials in soil and water, and microbiological coastal water quality in urban environments.


Click here for a full list of publications.


ESM 202: Environmental Biogeochemistry
ESM 214: Biological Waste Treatment**
ESM 214L: Laboratory in Bioremediation
ESM 219: Microbrial Processes in the Environment
ESM 219L: Laboratory in Microbial Proceses
ESM 595: PhD Seminars

**Elective course for IEES