Occurence of planktonic blooms under environmental fluctuations and its possible control mechanism - mathematical models and experimental observations

Sarkar, R. R. ; Chattopadhyay, J. (2003) Occurence of planktonic blooms under environmental fluctuations and its possible control mechanism - mathematical models and experimental observations Journal of Theoretical Biology, 224 (4). pp. 501-516. ISSN 0022-5193

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S00225...

Related URL: http://dx.doi.org/10.1016/S0022-5193(03)00200-5

Abstract

Planktonic blooms and its control is an intriguing problem in ecology. To investigate the oscillatory successions of blooms, three simple phytoplankton-zooplankton systems are proposed. It is observed that if the uptake function is linear and the process of toxin liberation is instantaneous, the oscillatory nature of blooms is not observed. On the other hand, periodic planktonic blooms are observed when toxin liberation process follows discrete time variation. The bloom phenomena described by this mechanism can be controlled through toxin producing phytoplankton (TPP). Introducing environmental fluctuation in the system, a critical value of time delay in terms of correlation time of the fluctuation is worked out. We observed from our mathematical analysis, numerical simulation and field observation that TPP and control of the rapidity of environmental fluctuation are key factors for the termination of planktonic blooms.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Toxin Producing Plankton (TPP); Zooplankton; Bloom; Time Delay; Colored Noise; Control
ID Code:7497
Deposited On:25 Oct 2010 11:22
Last Modified:30 May 2011 06:18

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