PJB-2024-317
BOUCHERIT Hafidha
Abstract
The high Oran steppe plains of Naâma contain the esparto group (Lygeum spartum), a steppe formation in the arid Mediterranean region. A spring 2020 phytoecological study was conducted on a steppe community in western Algeria's Naâma region. This group occupies vast steppe areas in Oran's high plains. This study uses qualitative and quantitative floristic analysis to examine ecological factors. This study will conduct 50 phytoecological surveys to evaluate the formation's floristic composition and ecology. This method allows inventory and ecological characterization of natural vegetation in relation to edapho-climatic conditions. The data was analyzed using Factor Correspondence Analysis. The floristic analysis shows less than 20% vegetation cover. Quantitative analysis shows a diverse floristic procession of 46 species from 20 families. Empirically established botanical specimens show the Poaceae and Asteraceae families. Esparto grass dominates this 41% of the floral procession. The biological spectrum includes therophytes, chamaephytes, and hemicryptophytes. The biogeographical components show 13 taxa with Mediterranean affinity. Floristic data shows three plant subgroups. (i) Lyguem spartum and Salsola vermiculata dominate these gypso-halophyte steppes. Psammophytes like Thymelaea microphylla dominate these degraded steppes. Mayflies like Atractylis humilis, Peganum harmala, and Plantago albicans characterize another type of degraded steppe. The esparto group is ecologically versatile due to its climate and soil adaptability. This group is prominent in the south-Oranian steppes.
Keywords: Lygeum spartum L., floristic composition, grouping, statistical analysis; Naama.
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