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Role of infochemical mediated zooplankton grazing in a phytoplankton competition model

Lewis, Nicola D and Breckels, Mark N and Steinke, Michael and Codling, Edward A (2013) 'Role of infochemical mediated zooplankton grazing in a phytoplankton competition model.' Ecological Complexity, 16. pp. 41-50. ISSN 1476-945X

Lewis et al TRITROPHIC MODEL AND COMPETITION Ecol Complex.pdf - Accepted Version

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Infochemicals released by marine phytoplankton play important roles in food web interactions by influencing the feeding behavior and selectivity of zooplanktonic predators. Recent modeling efforts have focused on the role of such chemicals as toxic grazing deterrents in phytoplankton competition. However, infochemicals may also be utilized as grazing cues, leading predators to profitable foraging patches. Here we investigate the role of infochemical mediated zooplankton grazing in a standard 3-species phytoplankton competition model, with the aim of further elucidating the ecological role of phytoplankton derived infochemicals. We then extend this to consider a more realistic 4-species model. The models produce a range of solutions depending on the strength of competition and microzooplankton grazing selectivity. Our key result is that infochemical chemoattractants, which increase the susceptibility of the producer to grazing, can provide a refuge for both competing phytoplankton species by attracting carnivorous copepods to consume microzooplankton grazers in a multi-trophic interaction. Our results indicate that infochemicals potentially have important consequences for the dynamics of marine food webs.

Item Type: Article
Uncontrolled Keywords: Infochemicals; Competition; Predation; Dimethylsulfide (DMS); Food web interactions; Population dynamics
Subjects: Q Science > Q Science (General)
Q Science > QA Mathematics
Divisions: Faculty of Science and Health
Faculty of Science and Health > Life Sciences, School of
Faculty of Science and Health > Mathematical Sciences, Department of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 02 Sep 2013 13:22
Last Modified: 21 Feb 2022 17:12

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