Dynamics of two phytoplankton populations under predation
The aim of this paper is to investigate the manner in which predation and single-nutrient competition affect the dynamics of a non-toxic and a toxic phytoplankton species in a homogeneous environment (such as a chemostat). We allow for the possibility that both species serve as prey for an herbivoro...
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| Format: | Article |
| Language: | English |
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AIMS Press
2014-08-01
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| Series: | Mathematical Biosciences and Engineering |
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| Online Access: | https://www.aimspress.com/article/doi/10.3934/mbe.2014.11.1319 |
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| author | Jean-Jacques Kengwoung-Keumo |
| author_facet | Jean-Jacques Kengwoung-Keumo |
| author_sort | Jean-Jacques Kengwoung-Keumo |
| collection | DOAJ |
| description | The aim of this paper is to investigate the manner in which predation and single-nutrient competition affect the dynamics of a non-toxic and a toxic phytoplankton species in a homogeneous environment (such as a chemostat). We allow for the possibility that both species serve as prey for an herbivorous zooplankton species. We assume that the toxic phytoplankton species produces toxins that affect only its own growth (autotoxicity). The autotoxicity assumption is ecologically explained by the fact that the toxin-producing phytoplankton is not mature enough to produce toxins that will affect the growth of its nontoxic competitor. We show that, in the absence of phytotoxic interactions and nutrient recycling, our model exhibits uniform persistence. The removal rates are distinct and we use general response functions. Finally, numerical simulations are carried out to show consistency with theoretical analysis. Our model has similarities with other food-chain models. As such, our results may be relevant to a wider spectrum of population models, not just those focused on plankton. Some open problems are discussed at the end of this paper. |
| format | Article |
| id | doaj-art-696e5c5f93dd4e329fa0ee286001e96b |
| institution | Kabale University |
| issn | 1551-0018 |
| language | English |
| publishDate | 2014-08-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | Mathematical Biosciences and Engineering |
| spelling | doaj-art-696e5c5f93dd4e329fa0ee286001e96b2025-01-24T02:29:00ZengAIMS PressMathematical Biosciences and Engineering1551-00182014-08-011161319133610.3934/mbe.2014.11.1319Dynamics of two phytoplankton populations under predationJean-Jacques Kengwoung-Keumo0Department of Mathematical Sciences, Cameron University, 2800 West Gore Boulevard, Lawton, OK 73505The aim of this paper is to investigate the manner in which predation and single-nutrient competition affect the dynamics of a non-toxic and a toxic phytoplankton species in a homogeneous environment (such as a chemostat). We allow for the possibility that both species serve as prey for an herbivorous zooplankton species. We assume that the toxic phytoplankton species produces toxins that affect only its own growth (autotoxicity). The autotoxicity assumption is ecologically explained by the fact that the toxin-producing phytoplankton is not mature enough to produce toxins that will affect the growth of its nontoxic competitor. We show that, in the absence of phytotoxic interactions and nutrient recycling, our model exhibits uniform persistence. The removal rates are distinct and we use general response functions. Finally, numerical simulations are carried out to show consistency with theoretical analysis. Our model has similarities with other food-chain models. As such, our results may be relevant to a wider spectrum of population models, not just those focused on plankton. Some open problems are discussed at the end of this paper.https://www.aimspress.com/article/doi/10.3934/mbe.2014.11.1319zooplanktonphytoplanktonplanktonchemostatuniform persistence.predation |
| spellingShingle | Jean-Jacques Kengwoung-Keumo Dynamics of two phytoplankton populations under predation Mathematical Biosciences and Engineering zooplankton phytoplankton plankton chemostat uniform persistence. predation |
| title | Dynamics of two phytoplankton populations under predation |
| title_full | Dynamics of two phytoplankton populations under predation |
| title_fullStr | Dynamics of two phytoplankton populations under predation |
| title_full_unstemmed | Dynamics of two phytoplankton populations under predation |
| title_short | Dynamics of two phytoplankton populations under predation |
| title_sort | dynamics of two phytoplankton populations under predation |
| topic | zooplankton phytoplankton plankton chemostat uniform persistence. predation |
| url | https://www.aimspress.com/article/doi/10.3934/mbe.2014.11.1319 |
| work_keys_str_mv | AT jeanjacqueskengwoungkeumo dynamicsoftwophytoplanktonpopulationsunderpredation |