Rais, Lynda ， Lakhdari, Somia ， Maghni, Noudjoud ， Messai, Alima
2025-12-12 EURO-MEDITERRANEAN JOURNAL FOR ENVIRONMENTAL INTEGRATION 2025 11(卷), 1(期), (null页)
This study explores the diversity and community structure of Odonata in the semi-arid wetlands of the Khenchela and Batna regions in northeastern Algeria, reporting several species recorded for the first time in this area. Field surveys were conducted from May to November 2023 across three freshwater sites: the Hassakheth Reservoir, Guechtane Wadi and the Tagharist Dam in Yabous. A total of twelve (12) species were identified, belonging to six families and encompassing both suborders: Zygoptera (Enallagma deserti, Ischnura saharensis, Coenagrion caerulescens, and Calopteryx virgomeridionalis) and Anisoptera (Anax imperator, Onychogomphus forcipatus, Orthetrum coerulescens, Orthetrum machadoi, Sympetrum fonscolombii, Sympetrum meridionale, Sympetrum vulgatum, and Trithemis kirbyi). The Shannon diversity index ranged from 1.61 to 2.27, reflecting moderate species richness across sites. Remarkably, the Batna and Khenchela wetlands shared only a single species, suggesting localized ecological differentiation. Among all sites, the Tagharist Dam exhibited the most structured and ecologically stable Odonata community, underscoring its importance for regional biodiversity conservation within this vulnerable semi-arid ecosystem.