Original paper

Massive capture of Eilema lurideola (Lepidoptera: Erebidae) in a beech forest: outbreak vs dispersal

Greco, Silvia; Infusino, Marco; Scalercio, Stefano

Entomologia Generalis Volume 36 Number 3 (2017), p. 193 - 206

published: Jul 1, 2017
manuscript accepted: Oct 4, 2016
manuscript revision received: May 25, 2016
manuscript revision requested: May 24, 2016
manuscript received: Feb 17, 2016

DOI: 10.1127/entomologia/2017/0337

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ArtNo. ESP146003603001, Price: 15.40 €

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Abstract

Abstract In this paper, we present data about an extraordinary abundance of Eilema lurideola in a beech forest on Pollino mountains (Calabria, Italy). We investigated nocturnal Lepidoptera in four different forest types, dominated by beech, chestnut, Calabrian black pine and silver fir respectively. Nine traps within each forest type were positioned for covering a total of 36 sampling sites. In just one night on July 20, 2015, 9776 individuals of Eilema lurideola (Zincken, 1871) were sampled in the beech woodland. 93% were collected in three traps located at the same site at a short distance from one another, 52% in a single trap. The remaining six traps collected only 680 individuals altogether. We did not yield similarly massive captures in the remaining three woodland types. We assume that the concentration of captures observed in three traps is mainly attributed to the coincidence of simultaneous events: peak of adult emergence of Eilema lurideola, and synergic effect of high nocturnal temperatures and topography of the site. This hypothesis seems to be confirmed by the concomitant capture in these traps of a lot of migrating species and other species which usually live at lower altitudes.

Keywords

population dynamicsmothswoodland habitatItaly