Cellular Automata Models of Crown-of-Thorns Outbreaks

Green, David G.

doi:10.1007/978-3-642-46726-4_10

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…This is mainly due to a lack of good spatial data to initialize a nonuniform model and due to the mathematical simplicity of considering a homogeneous background. In the following sections, I will be guided by the trends in current research and will be mainly concerned with self-induced spatial patterns although some examples of nonuniform starting conditions will also be described (Green 1990;Clayton et al 1997).…”

Section: Causes Of Heterogeneitymentioning

confidence: 99%

Spatial Models of Interacting Populations

Keeling

1999

Advanced Ecological Theory

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Section: Causes Of Heterogeneitymentioning

confidence: 99%

Spatial Models of Interacting Populations

Keeling

1999

Advanced Ecological Theory

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“…Coupled map lattice models have been successfully used in other areas of population ecology (Hassell, Comins and May [1991], Pacala and Tilman [1994]), and have predicted significant departures from the results of nonspatial models. The unusual features of the model include the use of the underlying structure of vegetation type and road location as the base for the model, rather than assuming a homogeneous environment; another example of this approach is Green [1990]. Also, global spatial distributions drive the dynamics, not a localized neighborhood of sites, because spatial structure enters the model through the dealers' travel costs.…”

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confidence: 99%

Spatial Dynamics of Two Harvested Wild Pig Populations

Keeling

Milner‐Gulland

Clayton

1999

Natural Resource Modeling

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ABSTRACT. Simple one‐ and two‐dimensional spatial models are developed for the harvesting of wild pigs in North Sulawesi, Indonesia. The models are used to explore the effects of changes in biological and economic parameter values on the spatial persistence of harvested populations, when off‐take must be transported to market. A two‐species model shows that the relative catchability of species harvested together strongly affects the distance from market at which each species persists. Due to strong positive feedback, travel costs are a major determinant of the length of the regions where pigs are extinct and exploited.

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Bringing Home the Bacon: A Spatial Model of Wild Pig Hunting in Sulawesi, Indonesia

Clayton

Keeling

Milner‐Gulland

1997

Ecological Applications

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A spatial model is developed for the hunting of two endemic wild pig species, the babirusa and the Sulawesi wild pig, in the northern arm of Sulawesi, Indonesia. The spatial component of the model allows the influences of distance from the end market, road condition, and the distribution of vegetation types to be included into the model. These are all key determinants of the effects of hunting pressure on populations of these species. The model shows that under current economic conditions at equilibrium, the babirusa will be reduced to very small numbers in remote parts of the region, while the Sulawesi wild pig will be less badly affected. Under the conditions pertaining in the 1950s, before major road‐building, the two species were much more widespread. The model is used to investigate the effects of various law‐enforcement policies on hunting. It is shown that the best way to reduce hunting pressure on the babirusa is to enforce fines for the selling of babirusa meat in the end market. The model is also sensitive to changes in hunters’ opportunity costs, showing that if economic conditions in the region improved, the hunting rate would decrease substantially. This is a new application for coupled map lattice models, and one with great potential for the analysis of the population dynamics of other exploited species.

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Cellular Automata Models of Crown-of-Thorns Outbreaks

Cited by 3 publications

References 7 publications

Spatial Models of Interacting Populations

Spatial Models of Interacting Populations

Spatial Dynamics of Two Harvested Wild Pig Populations

Bringing Home the Bacon: A Spatial Model of Wild Pig Hunting in Sulawesi, Indonesia

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