Dernière mise à jour le : 20 septembre 2016

Phenological and meteorological determinants of spider ballooning in an agricultural landscape


Spiders are known to commonly use aerial dispersal, so-called ballooning, especially at juvenile stages. They produce a silk thread that allows them to rise up in the air to disperse, which serves as inbreeding avoidance or to find an optimal over-winter habitat. Studies of phenology, species and meteorological factors associated with aerial dispersal have been limited to laboratory settings, with few data obtained under natural settings and no studies to date executed in France. To understand aerial dispersal, we conducted daily sampling between 2000 and 2002 at a height of 12 m. For adults, high proportions of “ballooners” were observed during four seasonal peaks, with dispersal most prevalent during summer, while for juveniles dispersal was protracted across summer and fall. Linyphiidae is the most abundant family among the 10,879 individuals caught. We show a significant and negative influence of high wind speeds on ballooning, an effect that increased even under low temperatures (< 19 °C). At wind speeds greater than 4 m·s?1 dispersal becomes difficult, and is almost impossible beyond 5.5 m·s?1. Ballooning ability is reported for the first time for several species. This study increases our knowledge on aerial dispersal in spiders in an agricultural context. Such behaviour can be seen as a survival strategy to escape from a disturbed and unstable landscape.

© extrait de l'article =
"[...] A Rothamsted Insect Survey suction trap was employed to study spider dispersal in Brittany, western France (48°6?44.82?N 1°46?51.16?O) in an agricultural landscape consisting of crops, hedgerows, woody areas and human infrastructures (e.g., buildings, roads). [...]"


keyboard_arrow_right Titre : Phenological and meteorological determinants of spider ballooning in an agricultural landscape
keyboard_arrow_right Type de documentation : Articles
keyboard_arrow_right Auteur(s) personne(s) : Petillon, Julien , Courtial Cyril, Simonneau Manon
keyboard_arrow_right Date de publication : 20 septembre 2016
keyboard_arrow_right Nombre de pages : 408-416
keyboard_arrow_right Editeur(s) : Elsevier
keyboard_arrow_right Tags thématiques : biosphère, organisme du sol, araignée, température
keyboard_arrow_right Mots-clés libres : Aerial dispersal/Araneae/Araneaeés/Dispersion aérienne/Phénologie/Phenology/Vitesse du vent/Wind speed
keyboard_arrow_right Langue : Anglais
keyboard_arrow_right N° d'édition (ISBN,DOI...) : 10.1016/j.crvi.2016.06.007
keyboard_arrow_right Collection : Comptes Rendus Biologies
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