Summer Workshop:
Discrete Dynamical Systems & Their Applications to Population Dynamics


Bifurcation plot and Liapunov exponents

 


3D phase space plots of data and model

 


More 3D phase space plots of data and model

Publications


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Costantino, R.F., Cushing, J.M., Dennis, B. and Desharnais, R.A. 1995. Experimentally induced transitions in the dynamic behavior of insect populations. Nature 375: 227-230.

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Dennis, B., Desharnais, R.A., Cushing, J.M. and Costantino, R.F. 1995. Nonlinear demographic dynamics: mathematical models, statistical methods, and biological experiments. Ecological Monographs 65: 261-281.

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Cushing, J.M., Dennis, B., Desharnais, R.A., and Costantino, R.F. 1996. An interdisciplinary approach to understanding nonlinear ecological dynamics. Ecological Modelling 92: 111-119.

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Desharnais, R.A. 1996. Strange attractors: chaos theory as a catalyst for the collaboration of science and art. Collaborative Inquiry in a Postmodern Era: A Cat's Cradle 2: 27-35.

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Henson, S.M. 1996. Existence and stability of nontrivial periodic solutions of periodically forced discrete dynamical systems. Journal of Difference Equations Applications 2: 315–331.

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Costantino, R.F., Desharnais, R.A., Cushing, J.M., and Dennis, B. 1997. Chaotic dynamics in an insect population. Science 275: 389-391.

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Desharnais, R.A., Costantino, R.F., Cushing, J.M., and Dennis, B. 1997. Estimating chaos in an insect population. Reply to Perry et al. Science 276: 1881-1882.

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Cushing, J.M. 1997. Nonlinear matrix equations as models for structured populations. Pages 205-243 in "Structured Population Models in Marine, Terrestrial, and Freshwater Systems," S. Tuljapurkar and H. Caswell (editors), Chapman & Hall, New York.

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Desharnais, R.A. 1997. Population dynamics of Tribolium. Pages 303-328 in "Structured Population Models in Marine, Terrestrial, and Freshwater Systems," S. Tuljapurkar and H. Caswell (editors), Chapman & Hall, New York.

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Dennis, B., Desharnais, R.A., Cushing, J.M., and Costantino, R.F. 1997. Transitions in population dynamics: equilibria to periodic cycles to aperiodic cycles. Journal of Animal Ecology 66: 704-729.

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Henson, S.M. & Cushing, J.M. 1997. The effect of periodic habitat fluctuations on a nonlinear insect population model. Journal of Mathematical Biology 36: 201-226.

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Henson, S.M. 1998. A continuous, age structured insect population model. Journal of Mathematical Biology 39: 217–243.

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Henson, S.M. 1998. Leslie matrix models as "stroboscopic snapshots" of McKendrick PDE models. Journal of Mathematical Biology 37: 309–328.

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Costantino, R.F., Cushing, J.M., Dennis, B., Desharnais, R.A., and Henson, S.M. 1998. Resonant population cycles in temporally fluctuating habitats. Bulletin of Mathematical Biology 60: 247-273.

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Cushing, J.M., Dennis, B., Desharnais, R.A., and Costantino, R.F. 1998. Moving toward an unstable equilibrium: saddle nodes in population systems. Journal of Animal Ecology 67: 298-306.

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Cushing, J.M. 1998. Periodically forced nonlinear systems of difference equations. Journal of Difference Equations and Applications 3: 547–561.

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Cushing, J.M., Costantino, R.F., Dennis, B., Desharnais, R.A., and Henson, S.M. 1998. Nonlinear population dynamics: models, experiments, and data. Journal of Theoretical Biology 194: 1–9.

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Henson, S.M., Cushing, J.M., Costantino, R.F., Dennis, B., and Desharnais, R.A. 1999. Phase switching in population cycles. Proceedings of the Royal Society, London B 265: 2229–2234.

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Henson, S.M. 1999. The effect of periodicity in maps. Journal of Difference Equations and Applications 5: 31–56.

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Henson, S.M., Costantino, R.F., Cushing, J.M., Dennis, B., and Desharnais, R.A. 1999. Multiple attractors and population dynamics in periodic habitats. Bulletin of Mathematical Biology 61: 1121–1149.

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Henson, S.M. 2000. Multiple attractors and resonance in periodically-forced population models. Physica D: Nonlinear Phenomena 140: 33–49.

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Cushing, J.M., Henson, S.M., Desharnais, R.A., Dennis, B., Costantino, R.F., and King, A. 2001. A chaotic attractor in ecology: theory and experimental data. Chaos, Solitons, and Fractals 12: 219–234.

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Dennis, B., Desharnais, R.A., Cushing, J.M., Henson, S.M. and Costantino, R.F. 2001. Estimating chaos and complex dynamics in an insect population. Ecological Monographs 71: 277–303.

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Desharnais, R.A., Dennis, B., Cushing, J.M., Henson, S.M., and Costantino, R.F. 2001. Chaos and population control of insect outbreaks. Ecology Letters 4: 229–235.

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Henson, S.M., Costantino, R.F., Cushing, J.M., Desharnais, R.A., Dennis, B., and King, A.A. 2001. Lattice effects observed in chaotic dynamics of experimental populations. Science 294: 602–605.

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Cushing, J.M. and Henson, S.M. 2001. Global dynamics of some periodically forced, monotone difference equations. Journal of Difference Equations and Applications 7: 859-872.

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Henson, S.M., Costantino, R.F., Desharnais, R.A., Cushing, J.M., and Dennis, B. 2002. Basins of attraction: population dynamics with two stable 4-cycles. Oikos 98: 17-24.

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King, A.A., Desharnais, R.A., Henson, S.M., Costantino, R.F., Cushing, J.M., and Dennis, B. 2002. Random perturbations and lattice effects in chaotic population dynamics: Reply to Domokos and Scheuring. Science 297: 2163a.

This work was supported in part by grants DMS-9306271, DMS-9319073, DMS-9625576, DMS-9616205, DMS-9981374, DMS-9973126, DMS-9981458, and DMS-9981423 from the U.S. National Science Foundation. All opinions expressed are those of the authors and not necessarily those of the NSF.

Copyright © 1997-2002, Robert A Desharnais
Department of Biological Sciences
California State University, Los Angeles, CA, 90032-8201
Email: rdeshar@calstatela.edu