Avoiding tipping points in fisheries management through Gaussian process dynamic programming

Proceedings. Biological Sciences
Carl BoettigerStephan B Munch

Abstract

Model uncertainty and limited data are fundamental challenges to robust management of human intervention in a natural system. These challenges are acutely highlighted by concerns that many ecological systems may contain tipping points, such as Allee population sizes. Before a collapse, we do not know where the tipping points lie, if they exist at all. Hence, we know neither a complete model of the system dynamics nor do we have access to data in some large region of state space where such a tipping point might exist. We illustrate how a Bayesian non-parametric approach using a Gaussian process (GP) prior provides a flexible representation of this inherent uncertainty. We embed GPs in a stochastic dynamic programming framework in order to make robust management predictions with both model uncertainty and limited data. We use simulations to evaluate this approach as compared with the standard approach of using model selection to choose from a set of candidate models. We find that model selection erroneously favours models without tipping points, leading to harvest policies that guarantee extinction. The Gaussian process dynamic programming (GPDP) performs nearly as well as the true model and significantly outperforms standard app...Continue Reading

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Jan 7, 2015·Marc MangelStephan Munch

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Citations

Feb 13, 2018·Ecological Applications : a Publication of the Ecological Society of America·Sean C Hackett, Michael B Bonsall
Dec 28, 2017·Ecology Letters·Wayne M GetzDavid O'Sullivan
Jan 19, 2019·Ecological Applications : a Publication of the Ecological Society of America·Sean C Hackett, Michael B Bonsall
Apr 12, 2017·Proceedings of the National Academy of Sciences of the United States of America·Michael A Gil, Andrew M Hein
May 18, 2018·Proceedings. Biological Sciences·Benjamin T MartinAndrew M Hein
Dec 25, 2019·Proceedings of the National Academy of Sciences of the United States of America·Tanya L Rogers, Stephan B Munch

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