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Évolution Saisonnière de la Myrmécofaune et de Son Activité Prédatrice dans un Milieu Forestier: les Interactions Clairière-Lisière-Forêt

Évolution Saisonnière de la Myrmécofaune et de Son Activité Prédatrice dans un Milieu Forestier:... Summary Observations were made in a clearing surrounded by a dense stand of Austrian black pine. Three habitats were distinguished: the clearing, the forest edge and the forest. Four times in the year, a census of their ant communities was taken, and the egg-eating activity of these insects was estimated by means of “traps” supplied with eggs of the mediterranean flour moth, Anagasta kuehniella. These studies have shown: 1) a high egg-eating activity of the ants in each of the three habitats; 2) large seasonal fluctuations of the richness, structure and density of the ant communities as well as of their egg-eating activity; 3) important exchanges between the three habitats. Two types of exchanges occur: 1) migrations of Leptothorax unifasciatus colonies from the clearing towards the forest edge and from the latter towards the forest (at the beginning of summer), or in the opposite direction (at the end of summer); 2) intensive exploitation of the forest by the colonies of Leptothorax unifasciatus, Pheidole pallidula and doubtless Myrmica specioides nesting in the two other habitats; these last exchanges reach a maximum in the midsummer. Thus, it appears that the clearings play an important part in the forest equilibria, through the predatory activity of their ant fauna. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Annales de la Société entomologique de France (N S ) Taylor & Francis

Évolution Saisonnière de la Myrmécofaune et de Son Activité Prédatrice dans un Milieu Forestier: les Interactions Clairière-Lisière-Forêt

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Publisher
Taylor & Francis
Copyright
© 1978 Société entomologique de France
ISSN
2168-6351
eISSN
0037-9271
DOI
10.1080/21686351.1978.12278682
Publisher site
See Article on Publisher Site

Abstract

Summary Observations were made in a clearing surrounded by a dense stand of Austrian black pine. Three habitats were distinguished: the clearing, the forest edge and the forest. Four times in the year, a census of their ant communities was taken, and the egg-eating activity of these insects was estimated by means of “traps” supplied with eggs of the mediterranean flour moth, Anagasta kuehniella. These studies have shown: 1) a high egg-eating activity of the ants in each of the three habitats; 2) large seasonal fluctuations of the richness, structure and density of the ant communities as well as of their egg-eating activity; 3) important exchanges between the three habitats. Two types of exchanges occur: 1) migrations of Leptothorax unifasciatus colonies from the clearing towards the forest edge and from the latter towards the forest (at the beginning of summer), or in the opposite direction (at the end of summer); 2) intensive exploitation of the forest by the colonies of Leptothorax unifasciatus, Pheidole pallidula and doubtless Myrmica specioides nesting in the two other habitats; these last exchanges reach a maximum in the midsummer. Thus, it appears that the clearings play an important part in the forest equilibria, through the predatory activity of their ant fauna.

Journal

Annales de la Société entomologique de France (N S ) – Taylor & Francis

Published: Apr 30, 1978

Keywords: Myrmécofaune; milieux forestiers; Ventoux; déplacements saisonniers; oophagie.

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