A delay differential equation model on harmful algal blooms in the presence of toxic substances

Authors: Chattopadhyay J.¹; Sarkar R.R.¹; el Abdllaoui A.²

Source: IMA Journal of Mathematics Applied in Medicine and Biology, Volume 19, Number 2, June 2002 , pp. 137-161(25)

Publisher: Oxford University Press

Buy & download fulltext article:

Price: $42.29 plus tax (Refund Policy)

Abstract:

The periodic nature of blooms is the main characteristic in marine plankton ecology. Release of toxic substances by phytoplankton species or toxic phytoplankton reduce the growth of zooplankton by decreasing grazing pressure and have an important role in planktonic blooms. A simple mathematical model of phytoplankton–zooplankton systems with such characteristics is proposed and analysed. As the process of liberation of toxic substances by phytoplankton species is still not clear, we try to describe a suitable mechanism to explain the cyclic nature of bloom dynamics by using different forms of toxin liberation process. To substantiate our analytical findings numerical simulations are performed and these adequately resemble the results obtained in our field study.

Keywords: phytoplankton; zooplankton; toxin; bloom; Hopf bifurcation

Document Type: Research article

DOI: http://dx.doi.org/10.1093/imammb/19.2.137

Affiliations: 1: Embryology Research Unit, Indian Statistical Institute, 203, B.T. Road, Kolkata 700108, India 2: Département de Mathématiques et Informatique, Faculté des Sciences, Université Med V de Rabat, Maroc

Publication date: 2002-06-01