TAILIEUCHUNG - Plant diversity and relationships with environmental factors after rangeland exclosure in arid Tunisia

On a broad scale, the extent of clearing and plowing of the crops in rangelands has brought a significant degradation in pasture species along with an invasion of weed species. This work evaluates the vegetation composition of an agriculture field after 15 years of exclosure and protection against clearing and plowing activities. | Turkish Journal of Botany Turk J Bot (2016) 40: 287-297 © TÜBİTAK doi: Research Article Plant diversity and relationships with environmental factors after rangeland exclosure in arid Tunisia 1,2, 2 2 1 Khalil MSEDDI *, Ahmad AL-SHAMMARI , Hossain SHARIF , Mohamed CHAIEB 1 Department of Biology, Laboratory of Botany, Faculty of Sciences of Sfax, Sfax, Tunisia 2 Laboratory of Ecology, Faculty of Sciences, Hail, Saudi Arabia Received: Accepted/Published Online: Final Version: Abstract: On a broad scale, the extent of clearing and plowing of the crops in rangelands has brought a significant degradation in pasture species along with an invasion of weed species. This work evaluates the vegetation composition of an agriculture field after 15 years of exclosure and protection against clearing and plowing activities. Vegetation cover, density, richness, species dispersion, and diversity index were estimated through 12 permanent transects of 20 m in length and 23 quadrats of 1 m2 over a 3-year period. Species diversity and its relationship with environmental factors (soil, canopy, elevation, and road effect) were analyzed by canonical correlation analysis. About 72 species were recorded across the study area. Plant species encountered were divided into three communities of steppic (), weed (), and steppic-weed (), with 1 cultivated species (). Raunkiaer classification showed a dominance of therophytes () over the other groups. This work showed that exclosure of degraded arid lands can regenerate of perennial plant cover that allowed to classify the experimental field as a low degraded zone. Key words: Degraded rangeland, vegetation restoration, exclosure, steppic, weed, pasture 1. Introduction In Tunisia’s arid regions, climatic variability and land use changes have caused considerable degradation in the vegetation and the structure of .

• Nông nghiệp
• Degraded rangeland
• Vegetation restoration
• Plant diversity
• Canonical correlation analysis
• Sisymbrium irio
• Antibacterial activity
• Clinical isolates
• Medicinal plants
• Plant extract
• Multi drug resistant Bacteria
• Candida albicans