Speaker
Description
"In this talk we focus on a 2D discrete host-parasitoid model to investigate the onset of on-off intermittency when we consider the environmental variability as a deterministic chaotic
driving process [1] instead of a stochastic one [2, 3]. To do that, we will vary in time the grazing parameter according to an evolution law that can exhibit chaotic behavior. This leads to a coupled non linear discrete 3D dynamical system, that is found to display a complex phenomenology and on-off intermittency in a narrow region of the parameter space. The deterministic framework allows to relate more directly the onset of the on-off intermittency to the dynamical properties of some attractors of the system.
This is a joint work with D. Lacitignola (Università di Cassino e del Lazio Meridionale) and F. Diele (IAC-CNR).
Acknowledgements.
Funder: Project funded under the National Recovery and Resilience Plan (NRRP), Mission 4 Component 2 Investment 1.4 - Call for tender No. 3138 of 16 December 2021, rectified by Decree n.3175 of 18 December 2021 of Italian Ministry of University and Research
funded by the European Union – NextGenerationEU; Award Number: Project code CN 00000033, Concession Decree No. 1034 of 17 June 2022 adopted by the Italian Ministry of University and Research, CUP B83C22002930006, Project title “National Biodiversity Future Center - NBFC”.
Funder: POR PUGLIA 2014/2020 - AZIONE 6.5 - 6.5.A (D.G.R. 150/2020 E D.D. n.108 del 06.08.2020), Project title “Monitoraggio di habitat e specie nel sito Murgia Alta”.
[1] Lacitignola D., Diele F., Monti A., On-off intermittency in a host-parasitoid model with a deterministic chaotic driver (in preparation).
[2] Vissio G., Provenzale A., On-off intermittency and irruptions in host-parasitoid dynamics, Journal of Theoretical Biology 546, 111174 (2022).
[3] Monti A., Diele F., Marangi C., Provenzale A., The onset of intermittency in the Beddington-Free-Lawton model (in preparation)"
