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Vegetation diversity along the altitudinal and environmental gradients in the main wadi beds in the mountainous region of South Sinai,Egypt

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Journal of Mountain Science 2020年第10期17卷 2447-2458页

作者： Kamal H.SHALTOUT Yassin M.AL-SODANY Ebrahem M.EID selim z.heneidy Mostafa A.TAHER Botany Department Faculty of ScienceTanta UniversityTanta31527Egypt Botany Department Faculty of ScienceKafrelsheikh UniversityKafr El-Sheikh33516Egypt Biology Department College of ScienceKing Khalid UniversityAbha61321Saudi Arabia Botany and Microbiology Department Faculty of ScienceMoharam BeyAlexandria UniversityAlexandria21511Egypt Botany Department Faculty of ScienceAswan UniversityAswan81528Egypt

South Sinai includes Egypt’s highest mountains that resemble an ecological island surrounded by *** present study aims to analyse the vegetation physiognomy along the altitudinal and environmental gradients in the main wadi beds in South Sinai mountainous *** includes determining the natural,native-weed and alien vegetation in representative stands in this region,analysing their vegetation in terms of species composition,abundance and life forms and determining the national and global distribution of the associated *** investigation also aims to describe the prevailing plant communities and assess the role of environmental conditions that affect the vegetation in this ***,thirty-two stands were chosen during March-June 2018 to reflect the prevailing altitude and environmental *** species was 316(229 genera and 61 families):186 species were perennials(58.9%),while 130 were annuals(41.1%).In addition,152 species were native weeds(48.1%of total species),31 were aliens(9.8%),along with 133 natural species(42.1%).Eight species were recorded as endemic to Egypt:Anarrhinum pubescens,Euphorbia sanctae-catharinae,Hypericum sinaicum,Origanum syriacum ***,Phlomis aurea,Primula boveana,Rosa arabica and Solanum *** addition,10 species were recorded as near-endemics to Egypt and other adjacent countries:Allium desertorum,Asclepias sinaica,Centaurea scoparia,Fagonia mollis ***,Hyoscyamus boveanus,Iphiona mucronata,Micromeria sinaica,Pterocephalus sanctus,Salvia deserti and Stachys *** the present study,33 species are threatened and categorized as follows:8 endangered,8 vulnerable and one indeterminate,while the rest were evaluated by the authors as *** rich plant diversity of this region is due to its extensive mountainous massif,which supports many *** high elevations in this region hinder the dispersal process of propagules,a situation which often tends to increase endemic and ne

关键词： Conservation Elevation gradient Multivariate analysis Plant diversity Sinai Threatened species

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