• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/conf/001/01/0093-0099

    • Keywords

       

      Population cycles; ecological modelling; bursting; bifurcation; coexistence; oscillation death; chaos

    • Abstract

       

      Explaining observations in the population dynamics of ecosystems influenced by the environment and being able to correctly predict future events in these complex systems is one of the major challenges in mathematical modelling. We present our models having climate parameters which explain experimental observations of the cyclic population dynamics of the larch budmoth – an insect pest which causes massive defoliation of entire larch forests at high altitudes around the world. The tritrophic ecological system consists of the larch trees, the budmoth and parasitoid species which live off the budmoths. We make an important modification of the models we had proposed earlier by incorporating a slow time dependence in one of the species-specific parameters, in order to provide an explanation for the irregular larch budmoth cyclic outbreaks observed in the French Alps.

      PACS Nos 05.45.-a; 05.45.Pq; 87.23.Cc

    • Author Affiliations

       

      JANAKI BALAKRISHNAN1 SUDHARSANA V IYENGAR1 JÜRGEN KURTHS2

      1. School of Natural Sciences and Engineering, National Institute of Advanced Studies (N.I.A.S.), Indian Institute of Science Campus, Bengaluru 560 012, India.
      2. Potsdam Institute for Climate Impact Research, PO Box 601203, Potsdam 14412, Germany.
    • Dates

       
  • Indian Academy of Sciences
    Conference Series | News

© 2017-2019 Indian Academy of Sciences, Bengaluru.