Toxic phytoplankton-induced spatiotemporal patterns |
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Authors: | Sanjay Chaudhuri Joydev Chattopadhyay Ezio Venturino |
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Institution: | 1Dipartimento di Matematica “Giuseppe Peano”, Università di Torino, via Carlo Alberto 10, 10123 Torino, Italy ;2Agricultural and Ecological Research Unit, Indian Statistical Institute, 203 B.T. Road, Kolkata, 700108 India |
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Abstract: | Here we consider a reaction diffusion system of three plankton populations, a zooplankton feeding on two phytoplankton populations,
in two different settings. Firstly, the two phytoplanktons are both non-toxic and both enhance the growth of the grazing zooplankton.
Secondly, we assume that one of the phytoplankton releases toxin and thereby inhibits the growth of the zooplankton. Our analytic
and numerical study shows that the spatiotemporal distribution of the plankton species is uniform when both phytoplankton
populations are non-toxic. However, in the presence of toxin-producing phytoplankton, the biomass distribution of all the
plankton populations becomes inhomogeneous. |
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Keywords: | Plankton dynamics Toxin-producing phytoplankton Toxin inhibition Diffusion Paradox of plankton Diffusive instability |
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