Interplay of harvesting and the growth rate for spatially diversified populations and the testing of a decoupled scheme

Md. Mashih Ibn Yasin Adan; Md. Kamrujjaman; Md. Mamun Molla; Muhammad Mohebujjaman; Clarisa Buenrostro; Md. Mashih Ibn Yasin Adan; Md. Kamrujjaman; Md. Mamun Molla; Muhammad Mohebujjaman; Clarisa Buenrostro

doi:10.3934/mbe.2023276

Mathematical Biosciences and Engineering

2023, Volume 20, Issue 4: 6374-6399. doi: 10.3934/mbe.2023276

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Research article Special Issues

Interplay of harvesting and the growth rate for spatially diversified populations and the testing of a decoupled scheme

1.
Department of Mathematics, University of Dhaka, Dhaka 1000, Bangladesh
2.
Department of Mathematics & Physics, North South University, Dhaka 1229, Bangladesh
3.
Center for Applied Scientific Computing, North South University, Dhaka 1229, Bangladesh
4.
Department of Mathematics and Physics, Texas A & M International University, Laredo, TX 78041, USA

Academic Editor: Mehmet Yavuz

Received: 03 November 2022 Revised: 27 December 2022 Accepted: 30 December 2022 Published: 01 February 2023

The loss and degradation of habitat, Allee effects, climate change, deforestation, hunting-overfishing and human disturbances are alarming and significant threats to the extinction of many species in ecology. When populations compete for natural resources, food supply and habitat, survival to extinction and various other issues are visible. This paper investigates the competition of two species in a heterogeneous environment that are subject to the effect of harvesting. The most realistic harvesting case is connected with the intrinsic growth rate, and the harvesting functions are developed based on this clause instead of random choice. We prove the existence and uniqueness of the solution to the model. Theoretically, we state that, when species coexist, one may drive the other to die out, so both species become extinct, considering all possible rational values of parameters. These results highlight a worthy-of attention study between two populations based on harvesting coefficients. Finally, we solve the model for two spatial dimensions by using a backward Euler, decoupled and linearized time-stepping fully discrete algorithm in a series of examples and observe a match between the theoretical and numerical findings.
- harvesting,
- diffusion,
- global analysis,
- competition,
- numerical analysis
Citation: Md. Mashih Ibn Yasin Adan, Md. Kamrujjaman, Md. Mamun Molla, Muhammad Mohebujjaman, Clarisa Buenrostro. Interplay of harvesting and the growth rate for spatially diversified populations and the testing of a decoupled scheme[J]. Mathematical Biosciences and Engineering, 2023, 20(4): 6374-6399. doi: 10.3934/mbe.2023276

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Abstract

The loss and degradation of habitat, Allee effects, climate change, deforestation, hunting-overfishing and human disturbances are alarming and significant threats to the extinction of many species in ecology. When populations compete for natural resources, food supply and habitat, survival to extinction and various other issues are visible. This paper investigates the competition of two species in a heterogeneous environment that are subject to the effect of harvesting. The most realistic harvesting case is connected with the intrinsic growth rate, and the harvesting functions are developed based on this clause instead of random choice. We prove the existence and uniqueness of the solution to the model. Theoretically, we state that, when species coexist, one may drive the other to die out, so both species become extinct, considering all possible rational values of parameters. These results highlight a worthy-of attention study between two populations based on harvesting coefficients. Finally, we solve the model for two spatial dimensions by using a backward Euler, decoupled and linearized time-stepping fully discrete algorithm in a series of examples and observe a match between the theoretical and numerical findings.

References

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