Bioeconomics of managing the spread of exotic pest species with barrier zones

Risk Analysis : an Official Publication of the Society for Risk Analysis
Alexei A Sharov

Abstract

Exotic pests are serious threats to North American ecosystems; thus, economic analysis of decisions about eradication, stopping, or slowing their spread may be critical to ecosystem management. The proposed bioeconomic model assumes that the rate of population expansion can be reduced (even to negative values in a case of eradication) if certain management actions are taken along the population front. The area of management can be viewed as a dynamic barrier zone that moves together with the population front. The lower is the target rate of spread, the higher would be both benefits and costs of the project. The problem is to find the optimal target rate of spread at which the present value of net benefits from managing population spread reaches its maximum value. If a population spreads along an infinite habitat strip, the target rate of spread is optimal if the slope of the cost function versus the rate of spread is equal to the ratio of the average pest-related damage per unit time and unit area to the discount rate. In a more complex model where the potential area of expansion is limited, two local maxima of net benefits may exist: one for eradication and another for slowing the spread. If both maxima are present, their heig...Continue Reading

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Sep 11, 2009·Journal of the Royal Society, Interface·L R CarrascoJ D Mumford
Mar 23, 2012·Proceedings. Biological Sciences·Julie C BlackwoodAndrew M Liebhold
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Oct 3, 2020·Journal of Mathematical Biology·Bingtuan LiBradley Coffman
Jul 15, 2016·Ecological Applications : a Publication of the Ecological Society of America·Christopher M Baker, Michael Bode

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