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标题：Ephemeroptera’s diversity and ecology in streams of the ultramafic massif of Beni Bousera and in the adjacent non-ultramafic sites (NW, Morocco)
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作者：Khadri O. ; Khadri O. ; EL Alami M. 等
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2017
卷号：8
期号：10
页码：3508-3523
出版社：University of Mohammed Premier Oujda
摘要：To contribute in the knowledge and the conservation of the faunistic biodiversity in streams of the ultramafic massif of Beni Bousera and in the adjacent sites, a faunal and ecological study of Ephemeroptera was started since autumn 2013 to autumn 2015 on 12 stations in this region and 14 others outside of this typical region in order to make a comparative study between the two types of watercourses and highlight the characteristics of the serpentine. This study enabled us to analyze the distribution of Ephemeroptera according to the substrate’s nature crossed by these rivers (Peridotite, limestone or schist) and its influence on the physicochemical characteristics of water. The results obtained have allowed us to identify 6 families of Ephemeroptera distributed in 15 genus and 23 species. The Baetidae are characterized by a large spatiotemporal distribution, they are the most abundant and the most diverse family with 13 species, Baetis rhodani which is the most represented. However, the distribution of Ephemeroptera in the two study sites differs in terms of biodiversity. Thus, the species: Acentrella Almohades, Baetis fuscatus, Baetis meridionalis, Ecdyonurus rothschildi, Caenis pusilla Rhithrogena sp.1 and Serratella ignita seems to be absent in the region ultramafic of Beni Bousera which is characterized by high levels of magnesium and richness of heavy metals, especially nickel, chromium and cobalt. Anyhow, the similarities in terms of species are limited to a small number of taxa such as: Baetis maurus, Baetis pavidus, Baetis Rhodani and Caenis luctuosa who have a wide distribution. Furthermore, Centroptilum luteolum, Procloeon concinnum and Habroleptoides assefae, are exclusive species of the ultramafic region’s rivers of Beni Bousera and which have a very localized distribution. Indeed, despite the proximity and contact between the two regions studied, the correspondence factorial analysis (AFC) has clearly demonstrated the separation of the 26 stations studied in two groups (on peridotite and non-peridotite) and on the basis of the spatial distribution of the species listed. Thus, this separation expresses the adaptability of the species in each group to the habitat and their ecological preferences.
关键词：Diversity; Ephemeroptera; Biotypology; Rif; Beni Bousera; Serpentine