Response of a three-species cyclic ecosystem to a short-lived elevation of death rate

Sourin Chatterjee, Rina De, Chittaranjan Hens, Syamal K. Dana, Tomasz Kapitaniak, Sirshendu Bhattacharyya

Research output: Contribution to journalArticlepeer-review

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A balanced ecosystem with coexisting constituent species is often perturbed by different natural events that persist only for a finite duration of time. What becomes important is whether, in the aftermath, the ecosystem recovers its balance or not. Here we study the fate of an ecosystem by monitoring the dynamics of a particular species that encounters a sudden increase in death rate. For exploration of the fate of the species, we use Monte-Carlo simulation on a three-species cyclic rock-paper-scissor model. The density of the affected (by perturbation) species is found to drop exponentially immediately after the pulse is applied. In spite of showing this exponential decay as a short-time behavior, there exists a region in parameter space where this species surprisingly remains as a single survivor, wiping out the other two which had not been directly affected by the perturbation. Numerical simulations using stochastic differential equations of the species give consistency to our results.

Original languageEnglish
Article number20740
JournalScientific Reports
Issue number1
StatePublished - 25 Nov 2023
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2023, The Author(s).


C.H., S.K.D., and T.K. have been supported by the National Science Centre, Poland, OPUS Programs (Projects No. 2018/29/B/ST8/00457, and 2021/43/B/ST8/00641).

FundersFunder number
Narodowym Centrum Nauki2018/29/B/ST8/00457, 2021/43/B/ST8/00641


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