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Social evolution and collective defences against parasites in ants

Titel Englisch Social evolution and collective defences against parasites in ants
Gesuchsteller/in Chapuisat Michel
Nummer 125306
Förderungsinstrument Projektförderung (Abt. I-III)
Forschungseinrichtung Département d'Ecologie et d'Evolution Faculté de Biologie et de Médecine Université de Lausanne
Hochschule Universität Lausanne - LA
Hauptdisziplin Zoologie
Beginn/Ende 01.01.2010 - 28.02.2014
Bewilligter Betrag 528'104.00
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Keywords (10)

Social evolution; Parasites; Population genetics; Behaviour; Entomopathogenic fungi; Ants; Social insects; fungi; social behaviour; evolution

Lay Summary (Englisch)

Lead
Lay summary
Social groups are vulnerable to parasites, because frequent social contacts and high genetic relatedness facilitate the spread and adaptation of parasites within groups. Hence, parasites can affect the evolution and organization of social groups, and may in particular select for more genetically diverse groups. Conversely, social life permits the evolution of collective behavioural defences and the emergence of novel group-level adaptations to resist parasites. This project focuses on the impact of entomopathogenic fungi on ant societies of various degrees of complexity and on the collective defences of ants against these fungi. We will use the socially polymorphic ant Formica selysi and its naturally occurring fungal parasites as a model system. This system is highly appropriate to study the relationship between parasites and social structure variation because single-queen colonies (with low genetic diversity) and multiple-queen colonies (with high genetic diversity) of F. selysi occur in the same population. Moreover, we have already identified three entomopathogenic fungi infecting F. selysi in nature. We will combine field surveys and laboratory experiments to (1) investigate the prevalence and genetic diversity of these three entomopathogenic fungi in single- and multiple-queen colonies (2) assess the impact of Metarhizium anisopliae and B. bassiana on experimental groups of ant differing in diversity (3) investigate the behavioural defences of ants against fungal pathogens, at both the individual and collective levels and (4) test if the exposure to fungal pathogens influences colony founding. These experiments will provide major insights into how fungal parasites and insect societies interact. In particular, they will reveal if parasites select for more diverse social groups, and shed light on novel modes of defences emerging at the group-level through collective action or social transfer of immunity. More generally, these results should contribute to a better understanding of the influence of parasites on the organisation and evolution of societies.
Direktlink auf Lay Summary Letzte Aktualisierung: 21.02.2013

Verantw. Gesuchsteller/in und weitere Gesuchstellende

Mitarbeitende

Publikationen

Publikation
Ant brood function as life preservers during floods
Purcell Jessica, Avril Amaury, Jaffuel Geoffrey, Bates Sarah, Chapuisat Michel (2014), Ant brood function as life preservers during floods, in PLoS ONE, 9, e89211.
Differential allocation and deployment of direct and indirect defences by Vicia sepium along elevation gradients
Rasmann Sergio, Buri Aline, Gallot-Lavallee Marie, Joaquim Jessica, Purcell Jessica, Pellissier Loic (2014), Differential allocation and deployment of direct and indirect defences by Vicia sepium along elevation gradients, in JOURNAL OF ECOLOGY, 102(4), 930-938.
Impact of helpers on colony productivity in a primitively eusocial bee
Brand N., Chapuisat M. (2014), Impact of helpers on colony productivity in a primitively eusocial bee, in Behavioral Ecology and Sociobiology, 68, 291-298.
Smells like queen since the Cretaceous
Chapuisat Michel (2014), Smells like queen since the Cretaceous, in Science, 343(6168), 254-255.
Wood ants protect their brood with tree resin
Bruetsch Timothee, Chapuisat Michel (2014), Wood ants protect their brood with tree resin, in ANIMAL BEHAVIOUR, 93, 157-161.
Bidirectional shifts in colony queen number in a socially polymorphic ant population
Purcell J., Chapuisat M. (2013), Bidirectional shifts in colony queen number in a socially polymorphic ant population, in Evolution, 67, 1169-1180.
Functional diversity decreases with temperature in high elevation ant fauna
Reymond A., Purcell J., Cherix D., Guisan A., Pellissier L. (2013), Functional diversity decreases with temperature in high elevation ant fauna, in Ecological Entomology, 38, 364-373.
Pupal cocoons affect sanitary brood care and limit fungal infections in ant colonies
Tragust S., Ugelvig L. V., Chapuisat M., Heinze J., Cremer S. (2013), Pupal cocoons affect sanitary brood care and limit fungal infections in ant colonies, in BMC Evolutionary Biology, 13, 225.
Born to be bee, fed to be worker? The caste system of a primitively eusocial insect
Brand Nayuta, Chapuisat Michel (2012), Born to be bee, fed to be worker? The caste system of a primitively eusocial insect, in Frontiers in Zoology, 9, 35.
Co-evolution between sociality and dispersal: The role of synergistic cooperative benefits
Purcell Jessica, Brelsford Alan, Avilés Leticia (2012), Co-evolution between sociality and dispersal: The role of synergistic cooperative benefits, in Journal of Theoretical Biology, 312(0), 44-54.
Diversity, prevalence and virulence of fungal entomopathogens in colonies of the ant
Reber A., Chapuisat M. (2012), Diversity, prevalence and virulence of fungal entomopathogens in colonies of the ant, in Insectes Sociaux, 59, 231-239.
Effects of the social environment on the survival and fungal resistance of ant brood
Purcell J., Brütsch T., Chapuisat M. (2012), Effects of the social environment on the survival and fungal resistance of ant brood, in Behavioral Ecology and Sociobiology, 66, 467-474.
No evidence for immune priming in ants exposed to a fungal pathogen
Reber A., Chapuisat M. (2012), No evidence for immune priming in ants exposed to a fungal pathogen, in Plos One, 7(e35372), 1-6.
Spatio-Temporal Differentiation and Sociality in Spiders
Purcell J., Vasconcellos-Neto J., Gonzaga M. O., Fletcher J. A., Aviles L. (2012), Spatio-Temporal Differentiation and Sociality in Spiders, in Plos One, 7(e34592), 1-11.
The evolution of inbred social systems in spiders and other organisms: from short-term gains to long-term evolutionary dead ends?
Aviles L., Purcell Jessica (2012), The evolution of inbred social systems in spiders and other organisms: from short-term gains to long-term evolutionary dead ends?, in Advances in the Study of Behavior, Volume 44, 99-133.
The influence of social structure on brood survival and development in a socially polymorphic ant: insights from a cross-fostering experiment
Purcell J., Chapuisat M. (2012), The influence of social structure on brood survival and development in a socially polymorphic ant: insights from a cross-fostering experiment, in Journal of Evolutionary Biology, 25, 2288-2297.
Flexible colony-founding strategies in a socially polymorphic ant
Reber A., Meunier J., Chapuisat M. (2011), Flexible colony-founding strategies in a socially polymorphic ant, in Animal Behaviour, 79(2), 467-472.
Geographic patterns in the distribution of social systems in terrestrial arthropods
Purcell J. (2011), Geographic patterns in the distribution of social systems in terrestrial arthropods, in Biological Reviews, 86(2), 475-491.
Inclusive fitness theory and eusociality
Abbot P. and 136 other authors including Chapuisat M. (2011), Inclusive fitness theory and eusociality, in Nature, 471(7339), E1-E4.
Queen acceptance in a socially polymorphic ant
Meunier J., Reber A., Chapuisat M. (2011), Queen acceptance in a socially polymorphic ant, in Animal Behaviour, 81(1), 163-168.
The expression and impact of antifungal grooming in ants
Reber A., Purcell J., Buechel S. D., Buri P., Chapuisat M. (2011), The expression and impact of antifungal grooming in ants, in Journal of Evolutionary Biology, 24(5), 954-964.
Covariation between colony social structure and immune defences of workers in the ant
Castella G., Christe P., Chapuisat M. (2010), Covariation between colony social structure and immune defences of workers in the ant, in Insectes Sociaux, 57(2), 233-238.
Eusociality and cooperation
Keller L., Chapuisat M. (2010), Eusociality and cooperation, in Hildegard Kehrer-Sawatzki (ed.), John Wiley & Sons, Ltd, Chichester, 1-9.
Evolution: Plastic sociality in a sweat bee
Chapuisat M. (2010), Evolution: Plastic sociality in a sweat bee, in Current Biology, 20(22), R977-R979.
Reproductive conflicts and egg discrimination in a socially polymorphic ant
Meunier J., Delaplace L., Chapuisat M. (2010), Reproductive conflicts and egg discrimination in a socially polymorphic ant, in Behavioral Ecology and Sociobiology, 64(10), 1655-1663.
Social evolution: Sick ants face death alone
Chapuisat M. (2010), Social evolution: Sick ants face death alone, in Current Biology, 20(3), R104-R105.
Ant queens (Hymenoptera: Formicidae) are attracted to fungal pathogens during the initial stage of colony founding
Brütsch Timothée, Felden Antoine, Reber Anabelle, Chapuisat Michel, Ant queens (Hymenoptera: Formicidae) are attracted to fungal pathogens during the initial stage of colony founding, in Myrmecological News, 20.
Effects of the social environment on the survival and fungal resistance of ant brood
Purcell J., Brütsch T., Chapuisat M., Effects of the social environment on the survival and fungal resistance of ant brood, in Behavioral Ecology and Sociobiology.
Immune priming and pathogen resistance in ant queens
Galvez Dumas, Chapuisat Michel, Immune priming and pathogen resistance in ant queens, in Ecology and Evolution.
The evolution of eusociality
Keller L., Chapuisat M., The evolution of eusociality, in Jonathan B. Losos (ed.), Princeton University Press, Princeton.

Wissenschaftliche Veranstaltungen

Aktiver Beitrag

Titel Art des Beitrags Titel des Artikels oder Beitrages Datum Ort Beteiligte Personen
Biology 14 - The swiss conference on organismic biology Poster Social genotype distribution and discrimination in a socially polymorphic ant 13.02.2014 Genève, Schweiz Avril Amaury; Purcell Jessica;
Biology 14 - The swiss conference on organismic biology Poster The mechanisms of resin use in wood ants 13.02.2014 Genève, Schweiz Brütsch Timothée;
Biology 14 - The swiss conference on organismic biology Vortrag im Rahmen einer Tagung Foster care-givers influence brood pathogen resistance in ants 13.02.2014 Genève, Schweiz Purcell Jessica;
European Society for Evolutionary Biology Poster Foster care-givers influence brood pathogen resistance in ants 20.08.2013 Lisbon, Portugal Purcell Jessica;
Workshop 'Adaptation to climate from a spatial perspective' Poster Geographic patterns in the distribution of social systems in terrestrial arthropods 11.09.2011 Lammi Biological Station, Finland, Finnland Purcell Jessica;
Conférence Jacques Monod “Coevolutionary arms race between parasite virulence and host immune defence: challenges from state of the art research" Vortrag im Rahmen einer Tagung Social modulation of disease resistance in ants 03.09.2011 Roscoff , Frankreich Chapuisat Michel;
13th Congress of the European Society for Evolutionary Biology Vortrag im Rahmen einer Tagung Temporal shifts in queen number in a socially polymorphic ant population 20.08.2011 Tübingen, Deutschland Chapuisat Michel; Purcell Jessica;
Meeting of the International Union for the Study of Social Insects, French Section Vortrag im Rahmen einer Tagung L'immunité sociale chez les fourmis 13.04.2011 Banyuls-sur-Mer, Frankreich Chapuisat Michel;
XVIth International Congress of the International Union for the Study of Social Insects Vortrag im Rahmen einer Tagung Exploring the causes and consequences of social structure variation in ants 08.08.2010 Copenhagen, Dänemark Chapuisat Michel;


Selber organisiert

Titel Datum Ort

Kommunikation mit der Öffentlichkeit

Kommunikation Titel Medien Ort Jahr
Medienarbeit: Printmedien, Online-Medien Ants build rafts on the backs of their young Science International 2014
Medienarbeit: Radio, Fernsehen Des fourmis au pied marin RTS Westschweiz 2014
Medienarbeit: Printmedien, Online-Medien Elles utilisent leurs petits comme flotteurs 24 heures Westschweiz 2014
Medienarbeit: Printmedien, Online-Medien How ants make rafts to save the queen National Geographic International 2014
Medienarbeit: Printmedien, Online-Medien In a flood, ants really come together New York Times International 2014
Medienarbeit: Printmedien, Online-Medien Les fourmis forment des radeaux vivants Le Temps Westschweiz 2014
Medienarbeit: Printmedien, Online-Medien Rafting ants use babies as floating life-preservers during floods Los Angeles Times International 2014
Medienarbeit: Radio, Fernsehen Fourmis, les autres reines du Valais RTS Westschweiz 2013
Medienarbeit: Radio, Fernsehen Wie Tiere sich selbst therapieren SRF 2 Deutschschweiz 2013
Medienarbeit: Printmedien, Online-Medien La reine affame ses filles au nom de la lignée Le Temps Westschweiz 2012
Medienarbeit: Radio, Fernsehen L'importance de la nourriture chez les abeilles RTS 1 Westschweiz 2012
Medienarbeit: Radio, Fernsehen Les animaux médecins RSR La Première - Emission Impatience Westschweiz 2011
Referate/Veranstaltungen/Ausstellungen Les mystères de l'UNIL 2011 Westschweiz 2011
Medienarbeit: Printmedien, Online-Medien Pourquoi nombre d’animaux sont cannibales Le Temps Westschweiz 2011
Referate/Veranstaltungen/Ausstellungen L'erreur de Darwin, spectacle au Musée de Zoologie, Lausanne Westschweiz 2010
Referate/Veranstaltungen/Ausstellungen Les mystères de l'UNIL 2010 Westschweiz 2010

Verbundene Projekte

Nummer Titel Start Förderungsinstrument
146641 Ecological genomics of social polymorphism in ants 01.03.2014 Projektförderung (Abt. I-III)
108263 The evolution of breeding systems and social conflicts in ants 01.10.2005 Projektförderung (Abt. I-III)
104118 The economics of anti-parasite defences in animals 01.05.2004 Projektförderung (Abt. I-III)

Abstract

Social groups are vulnerable to parasites, because frequent social contacts and high genetic relatedness facilitate the spread and adaptation of parasites within groups. Hence, parasites can affect the evolution and organization of social groups, and may in particular select for more genetically diverse groups. Conversely, social life permits the evolution of collective behavioural defences and the emergence of novel group-level adaptations to resist parasites. This project focuses on the impact of entomopathogenic fungi on ant societies of various degrees of complexity and on the collective defences of ants against these fungi. We will use the socially polymorphic ant Formica selysi and its naturally occurring fungal parasites as a model system. This system is highly appropriate to study the relationship between parasites and social structure variation because single-queen colonies (with low genetic diversity) and multiple-queen colonies (with high genetic diversity) of F. selysi occur in the same population. Moreover, we have already identified three entomopathogenic fungi infecting F. selysi in nature, Metarhizium anisopliae, Beauveria bassiana and Paecilomyces lilacinus. We will combine field surveys and laboratory experiments to (1) investigate the prevalence and genetic diversity of these three entomopathogenic fungi in single- and multiple-queen colonies (2) assess the impact of M. anisopliae and B. bassiana on experimental groups of ant differing in diversity (varying genetic diversity, genotypic composition, body size distribution and past exposition to pathogens) (3) investigate the behavioural defences of ants against fungal pathogens, at both the individual and collective levels and (4) test if the exposition to fungal pathogens favours independent colony founding by multiple queens over solitary colony founding. These experiments will provide major insights into how fungal parasites and insect societies interact. In particular, they will reveal if parasites select for more diverse social groups, and shed light on novel modes of defences emerging at the group-level through collective action or social transfer of immunity. More generally, these results should contribute to a better understanding of the influence of parasites on the organisation and evolution of societies.
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