Rapid spread agents may impair biological control in a tritrophic food web with intraguild predation |
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| Affiliation: | 1. Harran University, Faculty of Arts and Sciences, Department of Mathematics, Sanliurfa 63290, Turkey;2. Harran University, Faculty of Education, Department of Mathematics and Science Education, Sanliurfa 63290, Turkey;1. School of Pure and Applied Sciences. Open University of Cyprus, Cyprus;2. Faculty of Forestry and Wood Technology, FFWT, Mendel University in Brno, Brno, Czech Republic;3. Department of Geoinformation for Environmental Management, CIHEAM-MAICh, Greece;1. College of Industrial Engineering, South Tehran Branch, Islamic Azad University, Entezari Alley, Oskoui Alley, Choobi Bridge, Tehran, Iran;2. College of Industrial Engineering, South Tehran Branch, Islamic Azad University, Entezari Alley, Oskoui Alley, Choobi Bridge, Tehran, Iran;3. Industrial Engineering Department, University of Science and Culture, Tehran, Iran;4. Department of Industrial Engineering, KHATAM University, Tehran, Iran;1. Dipartimento di Matematica “Giuseppe Peano”, via Carlo Alberto 10, Università di Torino, Torino 10123, ITALY;2. University of Yuzuncu Yil, Faculty of Agriculture, Dept. of Plant Protection, Van, 65080, TURKEY;3. Centre for Mathematical Biology and Department of Mathematical Sciences, University of Bath, Bath BA2 7AY, UK |
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| Abstract: | The augmentation of natural enemies against agricultural pests is a common tactic undertaken to minimize crop damage without the use of chemical pesticides. Failures of this strategy may result from (i) Allee effects acting on biological control agent; (ii) trophic interactions between the released control agent and native species in the local ecosystem; (iii) excessively rapid spreading agents. To investigate the interplay of these mechanisms in pest biocontrol efficiency in the context of intraguild predation (IGP), we develop a one-dimensional dynamical model of a spatial, tritrophic food web with intraguild predation. We show that the agent’s diffusivity (i.e., agent’s dispersal speed), and intraguild predator’s addition of alternative food sources are important factors in determining the success or failure of pest biocontrol. These results are obtained for spatially explicit models by considering the speed of dispersal of the control agent and the pest. Feedback from theoretical models as the one constructed in this work can provide useful guidelines for practitioners in biological control. |
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