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The role of heterogeneous agricultural landscapes in the suppression of pest species following random walk dispersal patterns

Author

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  • Potgieter, L.
  • van Vuuren, J.H.
  • Conlong, D.E.

Abstract

The contribution of a heterogeneous agricultural landscape (in terms of field layouts of diversified crop ages) towards pest suppression is considered in this study. The population dynamics of a pest species is modelled for a number of different mosaic configurations of differently aged agricultural crops across a spatial domain, where the harvesting of these fields occurs at different points in time. A reaction–diffusion model (with constant diffusion coefficients) of the pest species’ growth and dispersal within a temporally variable and spatially heterogeneous environment is utilised to perform simulations. The primary objective is to establish whether or not there exist certain field configurations of differently aged crops in which average infestation levels are a minimum. It is found that more diversified field configurations (in terms of crop age) with the total length of boundaries shared between differently aged crops at a minimum, yield lower average infestation levels.

Suggested Citation

  • Potgieter, L. & van Vuuren, J.H. & Conlong, D.E., 2015. "The role of heterogeneous agricultural landscapes in the suppression of pest species following random walk dispersal patterns," Ecological Modelling, Elsevier, vol. 306(C), pages 240-246.
    • Handle: RePEc:eee:ecomod:v:306:y:2015:i:c:p:240-246
    DOI: 10.1016/j.ecolmodel.2014.11.029
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    References listed on IDEAS

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    1. Potgieter, L. & van Vuuren, J.H. & Conlong, D.E., 2013. "A reaction–diffusion model for the control of Eldana saccharina Walker in sugarcane using the sterile insect technique," Ecological Modelling, Elsevier, vol. 250(C), pages 319-328.
    2. Ovaskainen, Otso, 2008. "Analytical and numerical tools for diffusion-based movement models," Theoretical Population Biology, Elsevier, vol. 73(2), pages 198-211.
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    Cited by:

    1. Bourhis, Yoann & Poggi, Sylvain & Mammeri, Youcef & Le Cointe, Ronan & Cortesero, Anne-Marie & Parisey, Nicolas, 2017. "Foraging as the landscape grip for population dynamics—A mechanistic model applied to crop protection," Ecological Modelling, Elsevier, vol. 354(C), pages 26-36.

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