Biotic interactions may shape deeply the structure of ecological communities and ecosystem functi... more Biotic interactions may shape deeply the structure of ecological communities and ecosystem functioning since species are interconnected in a direct and indirect manner through a complex web of interactions. Species are usually engaged in antagonistic or mutualistic networks. Two of the most studied plant–plant interactions are competition and facilitation which represent in turn negative and positive interactions; both have been described as drivers in arid and semiarid vegetation structure. In addition, plant–animal interactions such as pollination and seed dispersal (frugivory) have been described as responsible for distribution patterns of many plant species especially in desert ecosystems, such as Cactaceae species. Abiotic interactions are not less important, limited water supply has driven plants to a habitat specialization evolution, physical and chemical soil properties play a determinant role explaining plant distribution, plants influence soil at a local scale, and soil influences vegetation at landscape scale. Three environmental gradients have been detected as the factors influencing vegetation at El Huizache, San Luis Potosi, landscape characteristics (recognized as the most important group of variables), climate, and soil. Among plant species living in arid and semiarid regions of Mexico, Cactaceae family is the most emblematic group; this group of species has a great number of endemic; for this reason, it is considered as a priority in terms of biological conservation; in Mexico, this group has several risks such as over-exploitation, changes in land use, fragmentation of habitats, and the reduction in the populations causing many species to become extinct.
The Sinai Peninsula is currently recognized as one of the central regions for biodiversity in the... more The Sinai Peninsula is currently recognized as one of the central regions for biodiversity in the Middle East by the World Conservation Union. It is rich both in the number of species and the high percentage of endemics. The roughness in geomorphology leads to differentiation of enormous number of microhabitats and landforms which resulted in relatively high diversity in ecosystems and flora. The most conspicuous inhabited oasis in south Sinai is Feiran Oasis which is considered as the largest receiving amounts of runoff water from the drainage system of Wadi Feiran. The small size of Feiran Oasis, the limited water resources, the rapid development due to increased touristic and population pressures, as well as the present serious socio-economic situation may cause the destruction of the remaining natural habitats in the near future. Recently, it is subjected to severe destruction and dryness of a great deal of its characteristic date palm orchards habitat. Out of the 33 species which recorded for the first time from Feiran Oasis, 13 were invading xerophytes, growing in fields and orchards, and behaving as field weeds. Floristic analysis, species distribution, and soil–vegetation correlations in Wadi Solaf, W. El-Akhdar, and W. Romana (as inland wadis) were compared to W. Kid (a coastal wadi). In the eastern sector of Central Sinai, plant communities and vegetation analysis were performed along four tracks (unpaved and unaccessible roads): Nekhel–Al-Qasimia, Al-Qasimia–Al-Kuntella, Al-Kuntella–Al-Thamad, and Nekhel–Al-Malha.
Outside the oases of the Western Desert, five desert zones along a precipitation gradient were di... more Outside the oases of the Western Desert, five desert zones along a precipitation gradient were distinguished. In addition to the well-known semi-desert and full desert zones in the very north, three zones of extreme desert show a significant differentiation where the “accidental vegetation” occurs as precipitation is so low and falls so irregularly and no permanent vegetation exists. The accidental vegetation along two transects, the northern along Siwa Oasis–Mersa Matruh road and the southern along the Dakhla Oasis–Farafra Oasis road, was botanically explored, through their vegetation characteristics and soil attributes. The only known five populations of the endangered spinescent shrub, Randonia africana along Siwa Oasis–Mersa Matruh road, were examined with respect to their vegetation composition and soil features. Randonia africana reaches its easternmost limit of distribution in Egypt along this road. The oases are the most prominent features of the Western Desert of Egypt. A common irrigation pattern and habitat types around these wells were recognized and described. Floristically, this study confirms the separation of the northern oases (Siwa and Bahariya) in the limestone or white desert from those in the southern (Farafra, Dakhla and Kharga) in the sandstone desert. Vegetation and environment in the inland salt marshes of Siwa and Dakhla Oases and the saline lakes of Wadi El-Natrun were also studied.
Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology
The present work aimed to evaluate some eco-physiological responses of Alhagi graecorum to elucid... more The present work aimed to evaluate some eco-physiological responses of Alhagi graecorum to elucidate its osmotic adjustment and physiological adaptation mechanisms to withstand hyper-aridity. The p...
Astragalus L. is one of the largest angiosperm complex genera that belongs to the family Fabaceae... more Astragalus L. is one of the largest angiosperm complex genera that belongs to the family Fabaceae, subfamily Papilionoideae or Faboideae under the subtribe Astragalinae of the tribe Galegeae. The current study includes the whole plant morphology, DNA barcode (ITS2), and molecular marker (SCoT). Ten taxa representing four species of Astragalus were collected from different localities in Egypt during the period from February 2018 to May 2019. Morphologically, identification and classification of collected Astragalus plants occurred by utilizing the light microscope, regarding the taxonomic revisions of the reference collected Astragalus specimens in other Egyptian Herbaria. For molecular validation, ten SCoT primers were used in this study, producing a unique banding pattern to differentiate between ten samples of Astragalus taxa which generated 212 DNA fragments with an average of 12.2 bands per 10 Astragalus samples, with 8 to 37 fragments per primer. The 212 fragments amplified wer...
Plant Responses to Hyperarid Desert Environments, 2017
This chapter provides features of environmental factors and phytogeographical divisions for deser... more This chapter provides features of environmental factors and phytogeographical divisions for desert vegetation in China. There are three kinds of desert vegetation in China: semi-desert, true desert, and extremely arid desert. The desert vegetation is distributed on different land forms with diversified soil feature, extending in NW China with mean annual precipitation less than 200 mm. Dominant species in the desert vegetation in China include eight life forms.
The present book deals with the floristic diversity and vegetation composition of the functional ... more The present book deals with the floristic diversity and vegetation composition of the functional groups in the southern part of the Egyptian Eastern Desert were investigated through four transects (3 crossing the Eastern Desert and one along the Red Sea). These transects were (1) Qena-Safaga road, (2) Idfu-Marsa Alam road, (3) Aswan-Kharit-Gimal and (4) Red Sea Coastal Plain. A total of 94 plant species belonging to 33 families were recorded. Shrubs represented the largest functional group, while perennial herbs represented the smallest one. The application of cluster analysis technique has provided usefully tool in classifying stands into many vegetation groups coinciding with ecological variations. The soil-vegetation relationships were assessed by both DCA and CCA. Studying the functional groups (trees, shrubs, perennial herbs and annual herbs) responses to soil variables showed spatial changes that may affect functional groups. (CCA) used to elucidate the responses of the studie...
Plant Responses to Hyperarid Desert Environments, 2017
In this chapter, three main plant groups (climbing, succulent, and parasitic plants) that occur a... more In this chapter, three main plant groups (climbing, succulent, and parasitic plants) that occur as a direct response to desert environments in Egypt were investigated. There are both herbaceous and woody climbing plants, the woody known as lianas while the herbaceous are vines. Citrullus colocynthis, Cocculus pendulus, Cucumis prophetarum, Pergularia tomentosa, and Periploca angustifolia were the selected vines for study. The distribution patterns of the five selected plant species revealed that Citrullus colocynthis indicated a wide geographical range of distribution in Egypt. Cucumis prophetarum and Cocculus pendulus were confined to the eastern part of Egypt (Eastern Desert, Red Sea region, and Sinai Peninsula) between latitudes 22–30.5° and longitudes 31–36.2°. The vine–insect relationships indicated the record of 31 insect species belonging to 5 orders and 18 families in association with the studied plant species. The most associated insects were belonging to orders Hymenoptera (ants, bees, and wasps) and Coleoptera (beetles). The distribution patterns of succulents in Egypt in Sinai Peninsula and the Mediterranean regions included most of the succulent species (59 species in 11 families in Sinai and 44 species in 14 families in the Mediterranean region). Three xerophytic succulents (Anabasis articulata, Zygophyllum coccineum, and Haloxylon salicornicum), a halophytic succulent (Arthrocnemum macrostachyum), and a halophytic xerophytic succulent (Zygophyllum album) were selected for this study. The occurrence of parasite–host associations in southern Sinai, in the Galala and Arabian Deserts, and in Gebel Elba regions was restricted to the silt terraces and to channels and runnels of the main wadis which receive soft materials. Patterns of host specialization occur in the two species of Cistanche while Orobanche cernua parasitized members of this Zygophyllaceae.
Phytologia Balcanica: International Journal of Balkan Flora and Vegetation, 2015
Despite the actual desertification in Wadi El-Natrun Depression nitrated by tourism and overuse b... more Despite the actual desertification in Wadi El-Natrun Depression nitrated by tourism and overuse by nomads,142 species were recorded. Sixty-one species were considered as new additions, unrecorded before in four main habitats: (1) croplands (irrigated field plots); (2) orchards; (3) wastelands (moist land and abandoned salinized field plots); and (4) lakes (salinized water bodies). The floristic analysis suggested a close floristic relationship between Wadi El-Natrun and other oases or depressions of the Western Desert of Egypt.
The inland part of the Eastern Desert of Egypt forms an ecosystem with characteristic habitats: (... more The inland part of the Eastern Desert of Egypt forms an ecosystem with characteristic habitats: (1) rocky surface, (2) erosion pavement, (3) gravel desert, (4) slopes, (5) cliffs, and (6) desert wadi, which represents a drainage system collecting water from extensive catchment area. The geographic position of the mountainous range along the Red Sea coast is very conspicuous. The flora and vegetation of the Gebel Elba mountainous group is much richer than that of the other coastal mountain, where the Palaearctic and Afrotropical regions meet. The species composition of the Gebel Elba National Park was greatly influenced by disturbances such as severe cutting of trees and shrubs either for domestic fuel or charcoal production and browsing. In terms of classification and ordination, the vegetation and environment in northern wadis and southern wadis in four transects representing three different types of desert running from the Nile Valley to the Red Sea coast were investigated. Based ...
The subdivision of the Leguminosae-Papilionoideae into taxa of lower rank was subject for major d... more The subdivision of the Leguminosae-Papilionoideae into taxa of lower rank was subject for major discrepancies between traditional classifications while more recent phylogenetic studies provided no decisive answer to this problem. As a contribution towards resolving this situation, 81 morphological characters were recorded comparatively for 226 species and infra-specific taxa belonging to 75 genera representing 21 of the 32 tribes currently recognized in this subfamily. The data matrix was subjected to cluster analysis using the Sørensen distance measure and Ward’s clustering method of the PC-ord version-5 package of programs for Windows. This combination was selected from among the 56 combinations available in this package because it produced the taxonomically most feasible arrangement of the genera and species. The 75 genera are divided into two main groups A and B, whose recognition requires little more than the re-alignment of a few genera to resemble tribes 1-18 (Sophoreae to He...
The present study provides an analysis of the floristic composition, habitat types, vegetation st... more The present study provides an analysis of the floristic composition, habitat types, vegetation structure and species diversity, elucidating the role of the environmental factors that affect species distribution in Kharga Oasis, Western Desert, Egypt. The vegetation was sampled from 89 permanently visited stands in 12 sites situated along N - S line transect across the oasis, and extending for about 185 km to cover as much as possible the physiognomic variation in habitats. Four main habitats were recognized and forming concentric zones (from inside to outside): farmlands and date-palm orchards represent the inner zone, the waste-salinized lands (not saltmarshes) in the middle zone, and the surrounding (bounding) desert in the outer zone. A total of 122 species from 35 families and 102 genera represented the flora of the study area. Poaceae, Asteraceae and Fabaceae were the major families, which constituted 47% of the total flora. Classification using Bray-Curtis cluster analysis pro...
The Eastern Desert of Egypt occupies 21% (c. 223000 km2) of the total area of Egypt. From the ear... more The Eastern Desert of Egypt occupies 21% (c. 223000 km2) of the total area of Egypt. From the early beginnings of the last century, this desert attracted scientists, especially botanists, to study its flora, ecology and vegetation. This study (between Latitudes 30°00ˈN and 24°00ˈN) included an up-to-date checklist of its flora, quantitative analysis of its vegetation, patterns of species distribution, and a proposed phytogeographical map based on GIS analysis techniques of 500 geo-referenced sites as a preliminary step towards a general vegetation map. Classification of the vegetation yielded 20 vegetation associated distributed in 3 major habitats: (1) inland desert, (2) coastal wadis, and (3) roadsides. Fourteen species, mostly weeds, characterized the present survey that neither recorded in previous studies nor in the literature. These may be considered as new additions to the flora of the Eastern Desert of Egypt. On the other hand, 92 historical records (61 perennials, 31 annuals) were documented, and there was no other indication about their presence till to date. These can be considered as extinct. Species of Saharo-Sindian chorotype (element) were the dominant.
... Titre du document / Document title. Flora and vegetation of Qara Oasis, Egypt. Auteur(s) / Au... more ... Titre du document / Document title. Flora and vegetation of Qara Oasis, Egypt. Auteur(s) / Author(s). ABD EL-GHANI MM ; Affiliation(s) du ou des auteurs / Author(s) Affiliation(s). Maths sci. cent., biology dep., Makkah, ARABIE SAOUDITE Résumé / Abstract. ...
Biotic interactions may shape deeply the structure of ecological communities and ecosystem functi... more Biotic interactions may shape deeply the structure of ecological communities and ecosystem functioning since species are interconnected in a direct and indirect manner through a complex web of interactions. Species are usually engaged in antagonistic or mutualistic networks. Two of the most studied plant–plant interactions are competition and facilitation which represent in turn negative and positive interactions; both have been described as drivers in arid and semiarid vegetation structure. In addition, plant–animal interactions such as pollination and seed dispersal (frugivory) have been described as responsible for distribution patterns of many plant species especially in desert ecosystems, such as Cactaceae species. Abiotic interactions are not less important, limited water supply has driven plants to a habitat specialization evolution, physical and chemical soil properties play a determinant role explaining plant distribution, plants influence soil at a local scale, and soil influences vegetation at landscape scale. Three environmental gradients have been detected as the factors influencing vegetation at El Huizache, San Luis Potosi, landscape characteristics (recognized as the most important group of variables), climate, and soil. Among plant species living in arid and semiarid regions of Mexico, Cactaceae family is the most emblematic group; this group of species has a great number of endemic; for this reason, it is considered as a priority in terms of biological conservation; in Mexico, this group has several risks such as over-exploitation, changes in land use, fragmentation of habitats, and the reduction in the populations causing many species to become extinct.
The Sinai Peninsula is currently recognized as one of the central regions for biodiversity in the... more The Sinai Peninsula is currently recognized as one of the central regions for biodiversity in the Middle East by the World Conservation Union. It is rich both in the number of species and the high percentage of endemics. The roughness in geomorphology leads to differentiation of enormous number of microhabitats and landforms which resulted in relatively high diversity in ecosystems and flora. The most conspicuous inhabited oasis in south Sinai is Feiran Oasis which is considered as the largest receiving amounts of runoff water from the drainage system of Wadi Feiran. The small size of Feiran Oasis, the limited water resources, the rapid development due to increased touristic and population pressures, as well as the present serious socio-economic situation may cause the destruction of the remaining natural habitats in the near future. Recently, it is subjected to severe destruction and dryness of a great deal of its characteristic date palm orchards habitat. Out of the 33 species which recorded for the first time from Feiran Oasis, 13 were invading xerophytes, growing in fields and orchards, and behaving as field weeds. Floristic analysis, species distribution, and soil–vegetation correlations in Wadi Solaf, W. El-Akhdar, and W. Romana (as inland wadis) were compared to W. Kid (a coastal wadi). In the eastern sector of Central Sinai, plant communities and vegetation analysis were performed along four tracks (unpaved and unaccessible roads): Nekhel–Al-Qasimia, Al-Qasimia–Al-Kuntella, Al-Kuntella–Al-Thamad, and Nekhel–Al-Malha.
Outside the oases of the Western Desert, five desert zones along a precipitation gradient were di... more Outside the oases of the Western Desert, five desert zones along a precipitation gradient were distinguished. In addition to the well-known semi-desert and full desert zones in the very north, three zones of extreme desert show a significant differentiation where the “accidental vegetation” occurs as precipitation is so low and falls so irregularly and no permanent vegetation exists. The accidental vegetation along two transects, the northern along Siwa Oasis–Mersa Matruh road and the southern along the Dakhla Oasis–Farafra Oasis road, was botanically explored, through their vegetation characteristics and soil attributes. The only known five populations of the endangered spinescent shrub, Randonia africana along Siwa Oasis–Mersa Matruh road, were examined with respect to their vegetation composition and soil features. Randonia africana reaches its easternmost limit of distribution in Egypt along this road. The oases are the most prominent features of the Western Desert of Egypt. A common irrigation pattern and habitat types around these wells were recognized and described. Floristically, this study confirms the separation of the northern oases (Siwa and Bahariya) in the limestone or white desert from those in the southern (Farafra, Dakhla and Kharga) in the sandstone desert. Vegetation and environment in the inland salt marshes of Siwa and Dakhla Oases and the saline lakes of Wadi El-Natrun were also studied.
Plant Biosystems - An International Journal Dealing with all Aspects of Plant Biology
The present work aimed to evaluate some eco-physiological responses of Alhagi graecorum to elucid... more The present work aimed to evaluate some eco-physiological responses of Alhagi graecorum to elucidate its osmotic adjustment and physiological adaptation mechanisms to withstand hyper-aridity. The p...
Astragalus L. is one of the largest angiosperm complex genera that belongs to the family Fabaceae... more Astragalus L. is one of the largest angiosperm complex genera that belongs to the family Fabaceae, subfamily Papilionoideae or Faboideae under the subtribe Astragalinae of the tribe Galegeae. The current study includes the whole plant morphology, DNA barcode (ITS2), and molecular marker (SCoT). Ten taxa representing four species of Astragalus were collected from different localities in Egypt during the period from February 2018 to May 2019. Morphologically, identification and classification of collected Astragalus plants occurred by utilizing the light microscope, regarding the taxonomic revisions of the reference collected Astragalus specimens in other Egyptian Herbaria. For molecular validation, ten SCoT primers were used in this study, producing a unique banding pattern to differentiate between ten samples of Astragalus taxa which generated 212 DNA fragments with an average of 12.2 bands per 10 Astragalus samples, with 8 to 37 fragments per primer. The 212 fragments amplified wer...
Plant Responses to Hyperarid Desert Environments, 2017
This chapter provides features of environmental factors and phytogeographical divisions for deser... more This chapter provides features of environmental factors and phytogeographical divisions for desert vegetation in China. There are three kinds of desert vegetation in China: semi-desert, true desert, and extremely arid desert. The desert vegetation is distributed on different land forms with diversified soil feature, extending in NW China with mean annual precipitation less than 200 mm. Dominant species in the desert vegetation in China include eight life forms.
The present book deals with the floristic diversity and vegetation composition of the functional ... more The present book deals with the floristic diversity and vegetation composition of the functional groups in the southern part of the Egyptian Eastern Desert were investigated through four transects (3 crossing the Eastern Desert and one along the Red Sea). These transects were (1) Qena-Safaga road, (2) Idfu-Marsa Alam road, (3) Aswan-Kharit-Gimal and (4) Red Sea Coastal Plain. A total of 94 plant species belonging to 33 families were recorded. Shrubs represented the largest functional group, while perennial herbs represented the smallest one. The application of cluster analysis technique has provided usefully tool in classifying stands into many vegetation groups coinciding with ecological variations. The soil-vegetation relationships were assessed by both DCA and CCA. Studying the functional groups (trees, shrubs, perennial herbs and annual herbs) responses to soil variables showed spatial changes that may affect functional groups. (CCA) used to elucidate the responses of the studie...
Plant Responses to Hyperarid Desert Environments, 2017
In this chapter, three main plant groups (climbing, succulent, and parasitic plants) that occur a... more In this chapter, three main plant groups (climbing, succulent, and parasitic plants) that occur as a direct response to desert environments in Egypt were investigated. There are both herbaceous and woody climbing plants, the woody known as lianas while the herbaceous are vines. Citrullus colocynthis, Cocculus pendulus, Cucumis prophetarum, Pergularia tomentosa, and Periploca angustifolia were the selected vines for study. The distribution patterns of the five selected plant species revealed that Citrullus colocynthis indicated a wide geographical range of distribution in Egypt. Cucumis prophetarum and Cocculus pendulus were confined to the eastern part of Egypt (Eastern Desert, Red Sea region, and Sinai Peninsula) between latitudes 22–30.5° and longitudes 31–36.2°. The vine–insect relationships indicated the record of 31 insect species belonging to 5 orders and 18 families in association with the studied plant species. The most associated insects were belonging to orders Hymenoptera (ants, bees, and wasps) and Coleoptera (beetles). The distribution patterns of succulents in Egypt in Sinai Peninsula and the Mediterranean regions included most of the succulent species (59 species in 11 families in Sinai and 44 species in 14 families in the Mediterranean region). Three xerophytic succulents (Anabasis articulata, Zygophyllum coccineum, and Haloxylon salicornicum), a halophytic succulent (Arthrocnemum macrostachyum), and a halophytic xerophytic succulent (Zygophyllum album) were selected for this study. The occurrence of parasite–host associations in southern Sinai, in the Galala and Arabian Deserts, and in Gebel Elba regions was restricted to the silt terraces and to channels and runnels of the main wadis which receive soft materials. Patterns of host specialization occur in the two species of Cistanche while Orobanche cernua parasitized members of this Zygophyllaceae.
Phytologia Balcanica: International Journal of Balkan Flora and Vegetation, 2015
Despite the actual desertification in Wadi El-Natrun Depression nitrated by tourism and overuse b... more Despite the actual desertification in Wadi El-Natrun Depression nitrated by tourism and overuse by nomads,142 species were recorded. Sixty-one species were considered as new additions, unrecorded before in four main habitats: (1) croplands (irrigated field plots); (2) orchards; (3) wastelands (moist land and abandoned salinized field plots); and (4) lakes (salinized water bodies). The floristic analysis suggested a close floristic relationship between Wadi El-Natrun and other oases or depressions of the Western Desert of Egypt.
The inland part of the Eastern Desert of Egypt forms an ecosystem with characteristic habitats: (... more The inland part of the Eastern Desert of Egypt forms an ecosystem with characteristic habitats: (1) rocky surface, (2) erosion pavement, (3) gravel desert, (4) slopes, (5) cliffs, and (6) desert wadi, which represents a drainage system collecting water from extensive catchment area. The geographic position of the mountainous range along the Red Sea coast is very conspicuous. The flora and vegetation of the Gebel Elba mountainous group is much richer than that of the other coastal mountain, where the Palaearctic and Afrotropical regions meet. The species composition of the Gebel Elba National Park was greatly influenced by disturbances such as severe cutting of trees and shrubs either for domestic fuel or charcoal production and browsing. In terms of classification and ordination, the vegetation and environment in northern wadis and southern wadis in four transects representing three different types of desert running from the Nile Valley to the Red Sea coast were investigated. Based ...
The subdivision of the Leguminosae-Papilionoideae into taxa of lower rank was subject for major d... more The subdivision of the Leguminosae-Papilionoideae into taxa of lower rank was subject for major discrepancies between traditional classifications while more recent phylogenetic studies provided no decisive answer to this problem. As a contribution towards resolving this situation, 81 morphological characters were recorded comparatively for 226 species and infra-specific taxa belonging to 75 genera representing 21 of the 32 tribes currently recognized in this subfamily. The data matrix was subjected to cluster analysis using the Sørensen distance measure and Ward’s clustering method of the PC-ord version-5 package of programs for Windows. This combination was selected from among the 56 combinations available in this package because it produced the taxonomically most feasible arrangement of the genera and species. The 75 genera are divided into two main groups A and B, whose recognition requires little more than the re-alignment of a few genera to resemble tribes 1-18 (Sophoreae to He...
The present study provides an analysis of the floristic composition, habitat types, vegetation st... more The present study provides an analysis of the floristic composition, habitat types, vegetation structure and species diversity, elucidating the role of the environmental factors that affect species distribution in Kharga Oasis, Western Desert, Egypt. The vegetation was sampled from 89 permanently visited stands in 12 sites situated along N - S line transect across the oasis, and extending for about 185 km to cover as much as possible the physiognomic variation in habitats. Four main habitats were recognized and forming concentric zones (from inside to outside): farmlands and date-palm orchards represent the inner zone, the waste-salinized lands (not saltmarshes) in the middle zone, and the surrounding (bounding) desert in the outer zone. A total of 122 species from 35 families and 102 genera represented the flora of the study area. Poaceae, Asteraceae and Fabaceae were the major families, which constituted 47% of the total flora. Classification using Bray-Curtis cluster analysis pro...
The Eastern Desert of Egypt occupies 21% (c. 223000 km2) of the total area of Egypt. From the ear... more The Eastern Desert of Egypt occupies 21% (c. 223000 km2) of the total area of Egypt. From the early beginnings of the last century, this desert attracted scientists, especially botanists, to study its flora, ecology and vegetation. This study (between Latitudes 30°00ˈN and 24°00ˈN) included an up-to-date checklist of its flora, quantitative analysis of its vegetation, patterns of species distribution, and a proposed phytogeographical map based on GIS analysis techniques of 500 geo-referenced sites as a preliminary step towards a general vegetation map. Classification of the vegetation yielded 20 vegetation associated distributed in 3 major habitats: (1) inland desert, (2) coastal wadis, and (3) roadsides. Fourteen species, mostly weeds, characterized the present survey that neither recorded in previous studies nor in the literature. These may be considered as new additions to the flora of the Eastern Desert of Egypt. On the other hand, 92 historical records (61 perennials, 31 annuals) were documented, and there was no other indication about their presence till to date. These can be considered as extinct. Species of Saharo-Sindian chorotype (element) were the dominant.
... Titre du document / Document title. Flora and vegetation of Qara Oasis, Egypt. Auteur(s) / Au... more ... Titre du document / Document title. Flora and vegetation of Qara Oasis, Egypt. Auteur(s) / Author(s). ABD EL-GHANI MM ; Affiliation(s) du ou des auteurs / Author(s) Affiliation(s). Maths sci. cent., biology dep., Makkah, ARABIE SAOUDITE Résumé / Abstract. ...
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