Abstract
The negative binomial distribution often describes the distribution of arthropods within agroecosystems. When mobile arthropods are disrupted, such as may occur during chemical applications or changes in climatic conditions, they tend to move until they are again in a negative binomial distribution. While arthropod movement continues, the distribution remains negative binomial. This paper gives a mathematical model for this behavior. The movement of each arthropod is modeled using a Markov process based on a common transition function which is doubly stochastic and irreducible. The arthropods move independently except that the time until an arthropod moves is exponentially distributed with a mean proportional to the number of arthropods on the plant. Using this type of interaction, the Bose-Einstein distribution (which assigns equal probability to distinguishable spatial patterns) is the equilibrium distribution. If the number of arthropods and plants are each as large as 100, this distribution is closely approximated by the geometric distribution which is the limiting distribution. The geometric is a special case of the negative binomial distribution (k = 1) and is often observed when the sampling unit is the minor habitat of the arthropod. Parallels are drawn between the study of particles in a phase space and the distribution of arthropods in agroecosystems.
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© 1989 Springer-Verlag Berlin Heidelberg
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Young, L.J.W., Young, J.H. (1989). A Model of Arthropod Movement Within Agroecosystems. In: McDonald, L.L., Manly, B.F.J., Lockwood, J.A., Logan, J.A. (eds) Estimation and Analysis of Insect Populations. Lecture Notes in Statistics, vol 55. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-3664-1_27
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DOI: https://doi.org/10.1007/978-1-4612-3664-1_27
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