DYNAMICAL ANALYSIS OF A ALLELOPATHIC PHYTOPLANKTON MODEL

In this paper we have considered a two-species competitive phytoplankton system with one toxin producing phytoplankton. Local asymptotic stability of various equilibrium points are considered to understand the effect of toxic substance on the dynamics of the model system. By using a suitable Lyapunov function we have observed that the toxic substance has some stabilizing effect on the dynamics of model system.

[1]  Hans Berglund,et al.  Stimulation of Growth of Two Marine Green Algae by Organic Substances Excreted by Enteromorpha linza in Unialgal and Axenic Cultures , 1969 .

[2]  J. Chattopadhyay,et al.  A delay differential equations model of plankton allelopathy. , 1998, Mathematical biosciences.

[3]  Per Juel Hansen,et al.  Allelopathy in the prymnesiophyte Chrysochromulina polylepis: effect of cell concentration, growth phase and pH , 2001 .

[4]  Malay Bandyopadhyay,et al.  Deterministic and stochastic analysis of a nonlinear prey-predator system , 2003 .

[5]  Emilio García-Ladona,et al.  Modelling allelopathy among marine algae , 2005 .

[6]  Joydev Chattopadhyay,et al.  Ratio-dependent predator–prey model: effect of environmental fluctuation and stability , 2005 .

[7]  Malay Bandyopadhyay,et al.  Effect of randomly fluctuating environment on autotroph-herbivore model system , 2004, Int. J. Math. Math. Sci..

[8]  R. Whittaker,et al.  Allelochemics: chemical interactions between species. , 1971, Science.

[9]  M. Estrada,et al.  Biological control of harmful algal blooms: A modelling study , 2006 .

[10]  A. J. Lotka Elements of mathematical biology , 1956 .

[11]  Robertson Pratt,et al.  INFLUENCE OF THE SIZE OF THE INOCULUM ON THE GROWTH OF CHLORELLA VULGARIS IN FRESHLY PREPARED CULTURE MEDIUM , 1940 .

[12]  J. Duinker,et al.  Das CO2-Problem und die Rolle des Ozeans , 2005, Naturwissenschaften.

[13]  Joydev Chattopadhyay,et al.  Effect of toxic substances on a two-species competitive system , 1996 .