Effects of fertilizers used in agricultural fields on algal blooms

Subhendu Chakraborty, P. K. Tiwari, S. K. Sasmal, A. K. Misra, Joydev Chattopadhyay

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The increasing occurrence of algal blooms and their negative ecological impacts have led to intensified monitoring activities. This needs the proper identification of the most responsible factor/factors for the bloom formation. However, in natural systems, algal blooms result from a combination of factors and from observation it is difficult to identify the most important one. In the present paper, using a mathematical model we compare the effects of three human induced factors (fertilizer input in agricultural field, eutrophication due to other sources than fertilizers, and overfishing) on the bloom dynamics and DO level. By applying a sophisticated sensitivity analysis technique, we found that the increasing use of fertilizers in agricultural field causes more rapid algal growth and decreases DO level much faster than eutrophication from other sources and overfishing. We also look at the mechanisms how fertilizer input rate affects the algal bloom dynamics and DO level. The model can be helpful for the policy makers in determining the influential factors responsible for the bloom formation.
Original languageEnglish
JournalEuropean Physical Journal. Special Topics
Issue number9
Pages (from-to)2119-2133
Publication statusPublished - 2017


  • Physics
  • Condensed Matter Physics
  • Materials Science, general
  • Atomic, Molecular, Optical and Plasma Physics
  • Physics, general
  • Measurement Science and Instrumentation
  • Classical and Continuum Physics
  • SC12



Præstrud, M. R. & Brodersen, S. W.


Project: Research

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