THE POSITION OF SPIDERS IN THE PALM GROVE ECOSYSTEM OF THE BASIN OF OUARGLA (ALGERIANNORTHEAST)

Y ALIOUA; S BISSATI; O KHERBOUCHE

Y ALIOUA Université KASDI MERBAH Ouargla ,Département des Sciences Agronomiques.Faculté des Sciences de la Nature et de la Vie et Sciences de la terre et de l’Univers (Ouargla 30 000 Algérie)
S BISSATI Université KASDI MERBAH Ouargla. Laboratoire Bio-ressources Sahariennes: Préservation et Valorisation. Faculté des Sciences de la Nature et de la Vie et Sciences de la terre et de l’Univers (Algérie)
O KHERBOUCHE USTHB -Alger Laboratoire de la dynamique et biodiversité (Algérie)

Keywords: Spiders, Biodiversity, Ouargla, Palm grove, aharan agroecosystem

Abstract

he araniological composition in the region of Ouargla remains highly ill-known with regarding because of the absence of works. This study was carried out in four orchards of date palms in two palm groves located at the basin of Ouargla (Northeastern Algeria) from November 2010 to July 2011. Spiders were sampled regularly (10 days between each two sampling periods) using three methods: pitfall trapping, sweeping and direct hunting. The entire sample consists of a set of 1,905spiders, to give 61speciesbelonging to 18families. Gnaphosidae is most represented family, 14specieswere recorded in five genera, followed by Lyniphiidae and Thomisidae with seven species for each family.