|Postdoctoral Research Fellow
National Center for Ecological Analysis and Synthesis
University of California Santa Barbara
735 State St, Suite 300
Santa Barbara, CA 93101
USA Phone: +1 805 892 2522
Fax: +1 805 892 2510
I work predominantly on the characterisation and treatment of epistemic and linguistic uncertainty in ecology and conservation biology. I have applied Monte Carlo techniques, dependency bounds convolution, interval analysis and fuzzy set theory to a variety of problems. These include: calculation of global extinction rates; individual-based population models for Australian plants; the treatment of vagueness in the IUCN categories; the calculation of soil screening levels for contaminants; and contaminant exposure models for food webs. I am currently working on developing and testing methods for classifying conservation status and estimating risk.
Regan, H.M., B.E. Sample, and S. Ferson. Deterministic and Probabilistic Ecological Soil Screening Levels for Wildlife. Environmental Toxicology and Chemistry, 21(4):882-890, 2002.
Regan, H.M., M. Colyvan, and M.A. Burgman. A taxonomy and treatment of uncertainty for ecology and conservation biology. Ecological Applications, 12(2):618-628, 2002.
Elith, J., M.A. Burgman and H.M. Regan. Mapping epistemic uncertainty and vague concepts in predictions of species' distribution. Ecological Modelling, 157:313-329, 2002.
Regan, H.M., R. Lupia, A.N. Drinnan and M.A. Burgman. The currency and tempo of extinction. The American Naturalist, 157(1):1-10, January 2001.
Regan, H.M., M. Colyvan and M.A. Burgman. A Proposal for Fuzzy IUCN Categories and Criteria, Biological Conservation, 92(1):101-108, 2000.
Regan, H.M., and M. Colyvan. Fuzzy Sets and Threatened Species Classification, Conservation Biology, 14(4):1197-1199, August 2000.
Regan, H.M., B.K. Hope, and S. Ferson. Analysis and portrayal of uncertainty in a food web exposure model. Human and Ecological Risk Assessment, (in press).
Regan, H.M., H.R. Akçakaya, S. Ferson, K.V. Root, S. Carroll and L.R. Ginzburg. Treatments of uncertainty and variability in ecological risk assessment of single-species populations. Human and Ecological Risk Assessment, (in press).
Regan, H.M., S. Ferson, and D. Berleant. Equivalence of five methods for bounding uncertainty. International Journal of Approximate Reasoning, (in revision).
Colyvan, M., H.M. Regan, and S. Ferson. Is it a crime to belong to a reference class?, The Journal of Political Philosophy, 9(2):168-181, 2001.
Also reprinted in H. Kyburg and M. Thalos (eds.) Probability is the Very Guide of Life, Open Court, Chicago (in press).
Regan, H.M., S.J. Andelman, M.A. Burgman, et al. A guide to setting bounds on parameters for threatened species classification. (in prep.)
|Plant with flowering spear from the Australian grass tree family Xanthorrhoeaceae. Long grass-like leaves sprout from a trunk that can persist below or above ground level. Flowering generally occurs within four years after a fire. (Photo courtesy of the Australian National Botanic Gardens)||Seeds of Grevillea caleyi. Adult plants produce at most 15 seeds each, around 80% of which are eaten by native rodents before entering the soil-stored seed bank. (Photo courtesy of the Australian National Botanic Gardens)|
Regan, T.J., H.M. Regan, K. Bonham, R.J. Taylor, and M.A. Burgman. Modelling the impact of timber harvesting on a rare carnivorous land snail (Tasmaphena lamproides) in northwest Tasmania, Australia. Ecological Modelling, 139:253-264, 2001.
Regan H.M. Population Models: Individual-Based, in R.A. Pastorok, S.M. Bartell, S. Ferson, L.R. Ginzburg (eds.) Ecological Modeling in Risk Assessment: Chemical Effects on Populations, Ecosystems and Landscapes, Lewis Publishers, Boca Raton FL., pp. 65-82, 2002.
Akcakaya, H.R. and H.M. Regan. Population Models: Metapopulations, in R.A. Pastorok, S.M. Bartell, S. Ferson, L.R. Ginzburg (eds.) Ecological Modeling in Risk Assessment: Chemical Effects on Populations, Ecosystems and Landscapes, Lewis Publishers, Boca Raton FL., pp. 83-95, 2002.
Regan, H.M., T.D. Auld, D. Keith, and M.A. Burgman. The effects of fire and predation on the long-term persistence of an endangered shrub, Grevillea caleyi. Biological Conservation 109(1):73-83, 2003.
Taylor, R.J., T.J. Regan, H.M. Regan, M.A. Burgman and K.Bonham. Impacts of plantation development, harvesting schedules and rotation lengths on the rare snail Tasmaphena lamproides in northwest Tasmania: a population viability analysis. Forest Ecology and Management (in press).
Regan, H.M. and T.D. Auld. Using Population Viability Analysis for Management of an Endangered Australian Shrub, Grevillea caleyi. In H.R. Akçakaya, M.A. Burgman, O. Kindvall, P. Sjogren-Gulve, J. Hatfield, and M. McCarthy (eds.), Species Conservation and Management: Case Studies, Oxford University Press, (in press).
Pastorok, R.A., H.R. Akçakaya, H.M Regan, S. Ferson, and S.M. Bartell. Role of ecological modeling in risk assessment. Human and Ecological Risk Assessment, (in press).
Bartell, S.M., R.A. Pastorok, H.R. Akçakaya, H.M. Regan, S. Ferson and C. Mackay. Realism and relevance of ecological models used in chemical risk assessment. Human and Ecological Risk Assessment, (in press).
Tootell, N., H.M. Regan, D.A. Keith, and M. Tozer. Dynamics of disease and fire: an individual-based model of the grass tree Xanthorrhoea resinifera. (in prep.)
|Numerical solution of the nonlinear Schrodinger equation using a 2nd order symplectic integrator in combination with a pseudo-spectral spatial discretisation.|
Regan, H.M. Von Neumann stability analysis of symplectic integrators applied to Hamiltonian PDEs. Journal of Computational Mathematics, 20(6):pp, 2002.
Regan, H.M. Symplectic integration of Hamiltonian PDEs: equivalence of spatial discretisation techniques. (in prep.)