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  1. Can the presence of curved forms of the diatom <em>Aulacoseira ambigua</em> in the Nile (Egypt) and Vaal (South Africa) Rivers be ascribed to similar water quality conditions?

    Can the presence of curved forms of the diatom Aulacoseira ambigua in the Nile (Egypt) and Vaal (South Africa) Rivers be ascribed to similar water quality conditions?

    Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: S Janse van Vuuren --- Unit for Environmental Sciences and Management, South Africa AA Saber --- Botany Department, Faculty of Science, Egypt A Swanepoel --- Rand Water, Scientific Services, South Africa M Cantonati --- MUSE-Museo delle Scienze, Limnology and Phycology Section, Italy
    Spiral colonies of the diatom Aulacoseira ambigua were assigned the rank of forma (Aulacoseira ambigua f. japonica). This spiral-shaped, colonial, centric diatom has limited geographical distribution and is currently reported to occur in only a few countries in the world...
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