taxonID	type	description	language	source
038DA46191131549B4FF9CE3E5B9F99B.taxon	description	Stipa tenacissima L. 2.325 0 0 13.953 0 0 4.651 0 0 2.325 0 0 32.558 0 28.571 Stipagrostis (= Aristida) adscensionis L. 16.279 0 21.428 (Continued) Relative frequency (%) Family Species BBh. Ha. Co. Stipagrostis obtusa Nees Stipagrostis pengens (Desf.) De Winter Stipagrostis ciliate (Desf.) De Winter Tricholaena teneriffae (L. f.) Link Tetrapogon villosus Desf. Polygonaceae Polygonum equisetiforme Sibth. & Sm. Primulaceae Coris monspeliensis L. Pteridaceae Adiantum capillus-veneris L. Rhamnus lycioides L. Rhamnaceae Ziziphus lotus (L.) Lam. Rutaceae Ruta chalepensis L. Scrophulariaceae Anarrhinum brevifolium (Coss. & Kralik) Solanaceae Lycium arabicum Schweinf. ex Boiss Tamarix africana Poir. Tamaricaceae Tamarix gallica L. Thymelaeaceae Thymelaea sempervirens Murb. Urticaceae Forsskaolea tenacissima L. Fagonia glutinosa Delile Fagonia cretica L. Zygophyllaceae Nitraria retusa Asch. Zygophyllum album L. f. 20.930 11.111 28.571 2.325 0 0 18.604 0 0 9.302 0 0 6.976 0 0 6.976 0 0 4.651 0 0 4.651 0 0 2.325 0 0 9.302 11.111 0 2.325 0 0 4.651 0 0 11.627 11.111 7.142 2.325 0 0 2.325 0 0 4.651 0 0 2.325 0 7.142 4.651 55.555 0 9.302 0 28.571 6.976 0 0 2.325 0 0 Species richness 115 109 23 41 The a and B diversity among zones of the Biosphere Reserve of BouHedma The Jaccard index (B diversity) varied between 0.189 and 0.316 (Table 3). Statistical analysis showed a non-signifi- cant difference of H and D indexes among the three zones with (F (2, 63) = 2.629, P = 0.08) and (F (2, 63) = 3.022, P = 0.056), respectively. Nevertheless, Pielou evenness index was significant (F (2, 63) = 4.127, P = 0.021). For the a diversity, the BBh. zone was the most diverse showing a Shannon and Weaver index of 3.922 bits, a Simpson diversity index of 0.970 and a Pielou evenness index of 0.836. However, the least diverse was Ha. with 2.190, 0.706 and 0.811, respectively (Table 3). A highly significant Pearson’s correlation coefficient was observed between species richness and altitude (R 2 = 0.36, p = 0.003), while it was significant between species richness and longitude (R 2 = 0.58, p = 0.037).	en	Rouissi, Alaeddine, Ezzine, Olfa, Yangui, Islem, Nouainia, Walid, Zouaoui, Refa, Ammari, Youssef (2024): Phytoecological study of a Biosphere Reserve in arid climate in Tunisia. Caldasia 46 (1): 59-70
