The interplay between a self-organized process and an environmental template: corpse clustering under the influence of air currents in ants. Export

@article{Jost07, abstract = {Many spatial patterns observed in nature emerge from local processes and their interactions with the local environment. The clustering of objects by social insects represents such a pattern formation process that can be observed at both the individual and the collective level. In this paper, we study the interaction between air currents and clustering behaviour in order to address the coordinating mechanisms at the individual level that underlie the spatial pattern formation process in a heterogeneous environment. We choose the corpse clustering behaviour of the ant Messor sanctus as an experimental paradigm. In a specifically designed experimental set-up with a well-controlled laminar air flow (approx. 1 cm s-1), we first quantify the modulation of the individual corpse aggregation behaviour as a function of corpse density, air flow intensity and the ant's position with respect to corpse piles and air flow direction. We then explore by numerical simulation how the forming corpse piles modify the laminar air flow around them and link this result with the individual behaviour modulation. Finally, we demonstrate on the collective level that this laminar air flow leads to an elongation and a slow displacement of the formed corpse piles in the direction of the air current. Both the individual behaviour modulated by air flow and the air flow modulated by the forming corpse piles can explain the pile patterns observed on the collective level as a stigmergic process. We discuss the generality of this coordinating mechanism to explain the clustering phenomena in heterogeneous environments reported in the literature.}, author = {Jost, C. and Verret, J. and Casellas, E. and Gautrais, J. and Challet, M. and Lluc, J. and Blanco, S. and Clifton, M. J. and Theraulaz, G.}, citeulike-article-id = {3795833}, citeulike-linkout-0 = {http://dx.doi.org/10.1098/rsif.2006.0156}, citeulike-linkout-1 = {http://view.ncbi.nlm.nih.gov/pubmed/17015288}, citeulike-linkout-2 = {http://www.hubmed.org/display.cgi?uids=17015288}, day = {22}, doi = {10.1098/rsif.2006.0156}, issn = {1742-5689}, journal = {Journal of the Royal Society Interface}, keywords = {air-flow, ants, bias, clustering, experiment, model, self-organization}, month = {February}, number = {12}, pages = {107--116}, posted-at = {2008-12-16 09:21:12}, priority = {2}, title = {The interplay between a self-organized process and an environmental template: corpse clustering under the influence of air currents in ants.}, url = {http://dx.doi.org/10.1098/rsif.2006.0156}, volume = {4}, year = {2007} }

TY - JOUR ID - Jost07 L3 - citeulike-article-id:3795833 N2 - Many spatial patterns observed in nature emerge from local processes and their interactions with the local environment. The clustering of objects by social insects represents such a pattern formation process that can be observed at both the individual and the collective level. In this paper, we study the interaction between air currents and clustering behaviour in order to address the coordinating mechanisms at the individual level that underlie the spatial pattern formation process in a heterogeneous environment. We choose the corpse clustering behaviour of the ant Messor sanctus as an experimental paradigm. In a specifically designed experimental set-up with a well-controlled laminar air flow (approx. 1 cm s-1), we first quantify the modulation of the individual corpse aggregation behaviour as a function of corpse density, air flow intensity and the ant's position with respect to corpse piles and air flow direction. We then explore by numerical simulation how the forming corpse piles modify the laminar air flow around them and link this result with the individual behaviour modulation. Finally, we demonstrate on the collective level that this laminar air flow leads to an elongation and a slow displacement of the formed corpse piles in the direction of the air current. Both the individual behaviour modulated by air flow and the air flow modulated by the forming corpse piles can explain the pile patterns observed on the collective level as a stigmergic process. We discuss the generality of this coordinating mechanism to explain the clustering phenomena in heterogeneous environments reported in the literature. IS - 12 JF - Journal of the Royal Society Interface SN - 1742-5689 EP - 116 TI - The interplay between a self-organized process and an environmental template: corpse clustering under the influence of air currents in ants. VL - 4 SP - 107 KW - air-flow KW - ants KW - bias KW - clustering KW - experiment KW - model KW - self-organization AU - Jost, C AU - Verret, J AU - Casellas, E AU - Gautrais, J AU - Challet, M AU - Lluc, J AU - Blanco, S AU - Clifton, MJ AU - Theraulaz, G PY - 2007/02/22/ UR - http://dx.doi.org/10.1098/rsif.2006.0156 ER -