PJB-2025-278
Mekhloufi Moulai Brahim
Abstract
A comprehensive floristic survey conducted along the western coastal zone of Djelfa Province (Algeria) recorded 406 plant species distributed across 43 botanical families. Asteraceae was the most represented family, followed by Fabaceae, Caryophyllaceae, and Poaceae, all of which play significant ecological roles in semi-arid environments. The primary aim of the study was to assess floristic biodiversity and ecological organization across steppe ecosystems through an integrated approach, including species inventory, life form classification, flowering phenology, and soil physico-chemical analysis. Ten dominant species, such as Stipa tenacissima, Centaurea pomeliana, and Artemisia herba-alba, were identified as ecological indicators of semi-arid habitats. Frequently recorded taxa, including Bromus rubens and Malva sylvestris, reflect floristic richness and anthropogenic influence. Principal Component Analysis (PCA) revealed that salinity, calcium carbonate, and pH are key edaphic gradients influencing plant distribution. Hierarchical Ascendant Classification (HAC) distinguished floristic assemblages shaped by soil types and human disturbance. The biological spectrum was dominated by chamaephytes and hemicryptophytes, with a flowering peak in spring, reflecting resilience strategies. These findings offer valuable insights into floristic composition, ecological functioning, and conservation priorities in the Algerian steppe, serving as a baseline for sustainable management of biodiversity in semi-arid zones.
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