Mangiarotti Sylvain auteur aut IRD Fu E. auteur aut IRD Jouquet Pascal auteur aut IRD Tran M. T. auteur aut IRD Huc M. auteur aut IRD Bottinelli Nicolas auteur aut IRD text journalArticle eng text/pdf born digital access Considering in situ observations, chaos theory was taken as a basis to study the activity of anecic earthworms based on cast production from September 2016 to January 2018 in the Dong Cao watershed (Vietnam). To study this activity, the global modeling technique was used to obtain deterministic models of ordinary differential equations directly from observational time series. The obtained models show that the behavior of earthworms is chaotic; it is coupled to the dynamics of soil water content in a complex (integrative) way and can be interpreted as an habituation/sensitization process. However, this coupling is insufficient to explain the desynchronization of the cast production variations observed at different study sites. The retroaction of earthworm activity on soil is required to explain the spatiotemporal discrepancies. specialized 020 074 068 31 1 013134 [13 p.] 2021 1054-1500 https://www.documentation.ird.fr/hor/fdi:010081150 10.1063/5.0029969 1054-1500 [F B010081150] https://www.documentation.ird.fr/hor/fdi:010081150 https://www.documentation.ird.fr/intranet/publi/2021-05/010081150.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2021-05-17 2025-02-24 fdi:010081150 fre