Effects of fertilizers used in agricultural fields on algal blooms

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

Research output: Contribution to journalJournal articleResearchpeer-review

736 Downloads (Pure)

Abstract

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
Volume226
Issue number9
Pages (from-to)2119-2133
ISSN1951-6355
DOIs
Publication statusPublished - 2017

Keywords

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

Projects

COFUNDPostdocDTU: COFUNDPostdocDTU

Præstrud, M. R. & Brodersen, S. W.

01/01/201431/12/2019

Project: Research

Cite this