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Visualizing Oceanographic Data to Depict Long-term Changes in Phytoplankton
Published on: July 28, 2023
Recurring plankton bloom dynamics modeled via toxin-producing phytoplankton
Subhendu Chakraborty1, Samrat Chatterjee, Ezio Venturino
1Agricultural and Ecological Research Unit, Indian Statistical Institute, Kolkata 700108, India.
Abstract:
A simple nutrient-phytoplankton model is proposed and analyzed in the presence of toxic chemicals released by toxin-producing phytoplankton (TPP) to understand the dynamics of seasonally recurring bloom phenomena. We observe that the presence of toxic chemicals helps to explain the bloom phenomenon. We have further studied our proposed system by varying the toxin liberation rate. Our model displays a wide range of dynamical behaviours, from simple cyclical blooms to irregular chaotic blooms. We also observe skipping phenomenon. The effect of toxic chemicals released by TPP cannot, thus, be ignored in 'bottom-up' models.
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