The environment affects population dynamics through multiple drivers. Here we explore a simplified version of such influence in a three-species food chain, making use of the Hastings-Powell model. This represents an idealized resource-consumer-predator chain, or equivalently, a vegetation-host-parasitoid system. By stochastically perturbing the value of some parameters in this dynamical system, we observe dramatic modifications in the system behavior. In particular, we show the emergence of on-off intermittency, i.e., an irregular alternation between stable phases and sudden bursts in population size, which hints towards a possible conceptual description of population outbursts grounded into an environment-driven mechanism.
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Chiang Mai Univ, Fac Sci, Dept Math, Chiang Mai 50200, Thailand
Chiang Mai Univ, Adv Res Ctr Computat Simulat, Chiang Mai 50200, ThailandChiang Mai Univ, Fac Sci, Dept Math, Chiang Mai 50200, Thailand
Mouktonglang, Thanasa
Sabir, Zulqurnain
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United Arab Emirates Univ, Dept Math Sci, POB 15551, Al Ain, U Arab Emirates
Hazara Univ, Dept Math, Mansehra, PakistanChiang Mai Univ, Fac Sci, Dept Math, Chiang Mai 50200, Thailand
Sabir, Zulqurnain
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Raja, Muhammad Asif Zahoor
Bhatti, Saira
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COMSATS Univ Islamabad, Dept Math, Abbottabad Campus, Abbottabad, PakistanChiang Mai Univ, Fac Sci, Dept Math, Chiang Mai 50200, Thailand
Bhatti, Saira
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Botmart, Thongchai
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Weera, Wajaree
Zamart, Chantapish
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Khon Kaen Univ, Fac Sci, Dept Math, Khon Kaen 40002, ThailandChiang Mai Univ, Fac Sci, Dept Math, Chiang Mai 50200, Thailand