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Sensitivity of density-dependent threshold to species composition in arthropod aggregates
How mixed-species groups perform collective behaviours provides unique insights into the mechanisms that drive social interactions. Herein, we followed the aggregation process of two isopod species under monospecific and heterospecific conditions at three population densities. Our experimental resul...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5006165/ https://www.ncbi.nlm.nih.gov/pubmed/27576571 http://dx.doi.org/10.1038/srep32576 |
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author | Pierre, Broly Quentin, Ectors Geoffrey, Decuyper Nicolis, Stamatios C. Jean-Louis, Deneubourg |
author_facet | Pierre, Broly Quentin, Ectors Geoffrey, Decuyper Nicolis, Stamatios C. Jean-Louis, Deneubourg |
author_sort | Pierre, Broly |
collection | PubMed |
description | How mixed-species groups perform collective behaviours provides unique insights into the mechanisms that drive social interactions. Herein, we followed the aggregation process of two isopod species under monospecific and heterospecific conditions at three population densities. Our experimental results show that the formation of both the monospecific and heterospecific groups responds to a similar threshold function. Furthermore, the two species contribute equally to the mixed-species aggregate growth and are not spatiotemporally segregated. However, we show that the cohesion is weaker and the probability of forming aggregations is lower in heterospecific groups than in monospecific populations. Thus, our results show that amplification processes are shared between species, but that the weighting given to conspecific and heterospecific information differs. We develop a theoretical model to test this hypothesis. The model reproduces our experimental data and shows that a relatively low level of inter-attractions between species is able to generate mixed-species aggregates. Moreover the greater the total population, the lower this parameter value is needed to observe aggregation in both species. This highlights the importance to study not only qualitatively but also quantitatively the heterospecific interactions in mixed-species groups. Finally, the patterns observed could be biologically relevant in favouring the association between species. |
format | Online Article Text |
id | pubmed-5006165 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-50061652016-09-07 Sensitivity of density-dependent threshold to species composition in arthropod aggregates Pierre, Broly Quentin, Ectors Geoffrey, Decuyper Nicolis, Stamatios C. Jean-Louis, Deneubourg Sci Rep Article How mixed-species groups perform collective behaviours provides unique insights into the mechanisms that drive social interactions. Herein, we followed the aggregation process of two isopod species under monospecific and heterospecific conditions at three population densities. Our experimental results show that the formation of both the monospecific and heterospecific groups responds to a similar threshold function. Furthermore, the two species contribute equally to the mixed-species aggregate growth and are not spatiotemporally segregated. However, we show that the cohesion is weaker and the probability of forming aggregations is lower in heterospecific groups than in monospecific populations. Thus, our results show that amplification processes are shared between species, but that the weighting given to conspecific and heterospecific information differs. We develop a theoretical model to test this hypothesis. The model reproduces our experimental data and shows that a relatively low level of inter-attractions between species is able to generate mixed-species aggregates. Moreover the greater the total population, the lower this parameter value is needed to observe aggregation in both species. This highlights the importance to study not only qualitatively but also quantitatively the heterospecific interactions in mixed-species groups. Finally, the patterns observed could be biologically relevant in favouring the association between species. Nature Publishing Group 2016-08-31 /pmc/articles/PMC5006165/ /pubmed/27576571 http://dx.doi.org/10.1038/srep32576 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Pierre, Broly Quentin, Ectors Geoffrey, Decuyper Nicolis, Stamatios C. Jean-Louis, Deneubourg Sensitivity of density-dependent threshold to species composition in arthropod aggregates |
title | Sensitivity of density-dependent threshold to species composition in arthropod aggregates |
title_full | Sensitivity of density-dependent threshold to species composition in arthropod aggregates |
title_fullStr | Sensitivity of density-dependent threshold to species composition in arthropod aggregates |
title_full_unstemmed | Sensitivity of density-dependent threshold to species composition in arthropod aggregates |
title_short | Sensitivity of density-dependent threshold to species composition in arthropod aggregates |
title_sort | sensitivity of density-dependent threshold to species composition in arthropod aggregates |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5006165/ https://www.ncbi.nlm.nih.gov/pubmed/27576571 http://dx.doi.org/10.1038/srep32576 |
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