Dr. Ryan Harrigan

Associate Professor

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Biography

Ryan Harrigan is an Associate Adjunct Professor at the Institute of the Environment and Sustainability at the University of California, Los Angeles. His research interests primarily lie in evolutionary biology and ecology, focusing on species complexes and the evolutionary forces that shape complex phylogenetic relationships. Harrigan studies hybridization, introgression, and speciation events, in addition to incomplete lineage sorting. His work explores the interaction between biological phenomena and genetic relationships, emphasizing the impact of anthropogenic forces on these natural processes. One notable case he investigates is the North American waterfowl, a species complex that has been affected by both natural and artificial influences, revealing patterns in phylogeography and distribution. His current research examines the effects of anthropogenic stressors, such as the spread of introduced pathogens on migrant bird populations. Harrigan's ongoing projects include the Biodiversity Atlas of Southern California, which aims to balance the competing components of human and wildlife resource use. He also collaborates with other researchers to investigate environmental drivers of infectious diseases, including Ebola and West Nile Virus.

Research Interests

Requirements for University of California Los Angeles

Doctorate Program
Requirements
GPA Requirement
Required:3
GRE General
Verbal
Required:160
Quantitative
Required:160
Analytical Writing
Required:5
Overall
Required:5
TOEFL
Total
Required:87
IELTS
Overall
Required:7
Prerequisites
Bachelor's degree Strong background in Economics and Mathematics
Application Checklist
  • Online application
  • Statement of Purpose
  • Transcripts
  • 3 Letters of Recommendation
  • GRE General Test scores
Specialization Notes

Department of Economics admits primarily for the PhD program.