Evolution, Ecology & Organismal Biology

Helen Regan

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Office: (951) 827-3961
Fax: (951) 827-4286
3358 Spieth Hall
Email: helen.regan@ucr.edu

Helen Regan, Professor

Ph.D., University of New England, Armidale, Australia, 2000


My research areas span Quantitative Conservation Ecology and Probabilistic Risk Assessment. I apply population models, mathematical treatments of uncertainty and decision-making techniques to address conservation and wildlife management issues and ecological risk assessment. My research activities are broad and interdisciplinary and include: treatments of uncertainty in conservation, ecology and risk assessment; population viability analysis of endangered and threatened species; formal decision making for conservation management.

Students and post-docs interested in these areas are welcome to join my laboratory. I am affiliated with the Ecology graduate group within EEOB.

Lab Webpage


  • Davis, F., L. Sweet, J. Serra-Diaz, J. Franklin, I. McCullough*, A. Flint, L. Flint, J. Dingman, H. Regan, A. Syphard, L. Hannah, K. Redmond, M. Moritz. Shrinking windows of opportunity for oak seedling establishment in southern California mountains. Ecoshpere. 7(11), e01573, 2016.
  • Franklin, J., J.M. Serra-Diaz, A.D. Syphard and H.M. Regan. 2016. Big data for forecasting global change impacts on plant communities.Global Ecology and Biogeography. 26(1): 6-17, 2016.
  • Molina-Martinez*, A., J.L. Leon-Cortes, H.M. Regan, O.T. Lewis, D. Navarette, A. Luis-Martinez. Elevational shifts in butterfly species distribution in a Neotropical Mountain range. Diversity and Distributions. 22(11): 1085–1098, 2016.
  • Vollmer, D., Regan, H.M. and Andelman, S.J. Assessing the sustainability of freshwater systems: A critical review of composite indicators. Ambio. 45(7):765-7802016.
  • Hovel, K.A. and H.M. Regan. Using individual-based models to explore seascape ecology. In Seascape Ecology: Taking Landscape Ecology into the Sea. S.J. Pittman (ed.) John Wiley & Sons Ltd., UK. Accepted.
  • Collen, B., N.K. Dulvy, K.J. Gaston, U. Gärdenfors, D.A. Keith, A.E. Punt, H.M. Regan, M. Böhm, S. Hedges, M. Seddon, S.H.M. Butchart, C. Hilton-Taylor, M. Hoffmann, S.P. Bachman, H.R. Akçakaya. Clarifying misconceptions of extinction risk assessment with the IUCN Red List. Biology Letters. 12: 20150843. http://dx.doi.org/10.1098/rsbl.2015.0843, 2016.
  • Franklin, J., J.M. Serra-Diez, A.D. Syphard and H.M. Regan. Global change and terrestrial plant community dynamics.Proceedings of the National Academy of Sciences. 113(14):3725-3734, 2016.
  • Serra-Diaz, J.M., Franklin, J., Sweet, L.C., McCullough, I.M., Syphard, A.D, Regan, H.M, Flint, L.E., Flint, A.L, Dingman, J.R., Moritz, M., Redmon, K., Hannah, L., Davis. F.W. Averaged 30 year climate change projections mask opportunities for species establishment. Ecography 39: 844–845, 2016.
  • Rueda-Cediel*, P., K.A. Anderson, T.J. Regan, J. Franklin, and H.M. Regan. Combined influences of model choice, data quality, and data quantity when estimating population trends. PLoS ONE 10(7): e0132255. 2015. 
  • Conlisk, E., A.D. Syphard, J. Franklin, and H.M. Regan. Predicting the impact of fire on a vulnerable multi-species community using a dynamic vegetation model. Ecological Modelling 301:27-39, 2015.

(complete publication list)

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General Campus Information

University of California, Riverside
900 University Ave.
Riverside, CA 92521
Tel: (951) 827-1012

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Department Information

Evolution, Ecology and Organismal Biology (EEOB)
2710 Life Sciences Bldg.

Tel: (951) 827-5903
Fax: (951) 827-4286
E-mail: bnnadmin@ucr.edu

Graduate Program
1140 Batchelor Hall
Tel: (951) 827-4116
Fax: (951) 827-5517
E-mail: eeobgrad@ucr.edu