Floristic Diversity of Jabal Al-Ward, Southwest Tabuk Region, Kingdom of Saudi Arabia

Elkordy, Ahmed; Nour, Iman H.; Ellmouni, Faten Y.; Shaye, Najla A. Al; Al-Bakre, Dhafer A.; El-Banhawy, Ahmed

doi:10.3390/agronomy12112626

Cited by 6 publications

(6 citation statements)

References 54 publications

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“…In the present investigation, three life forms were noticed, with Phanerophytes being the most prominent (19 species = 83%), followed by Therophytes (three species = 13%). This result agreed with the findings that were reported by Abbas et al [59] and Elkordy et al [71] in different regions of the Kingdom. The dominance of perennial species reflects the characterization of the vegetation in the studied region.…”

Section: Discussionsupporting

confidence: 94%

Ecology and Diversity of Angiosperm Parasites and Their Host Plants along Elevation Gradient in Al-Baha Region, Saudi Arabia

Al-Robai

2023

Diversity

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The ecology and diversity of flowering parasitic plants and their hosts are poorly investigated and usually ignored in Saudi Arabian plant communities. Therefore, this work aimed at assessing the ecology and diversity of parasitic plants and their hosts along an elevation gradient in the Al-Baha region (1300–2400 m.a.s.l.). Different quantitative vegetation parameters were applied to analyze the collected data. Eight parasitic plants from six genera and four families were identified along the gradient, with 67% of them being zoochorously dispersed species. They accounted for approximately 23.5% (8 out of 34) of those found throughout Saudi Arabia. Perennials, stem hemiparasites, and biregional taxa accounted for around 62.5% of the total parasites, whereas indigenous species accounted for 75%. The dominant family of parasitic species was Loranthaceae (50%), and Phragmanthera austroarabica A.G.Mill. & J.A.Nyberg was the most important species (IVI = 107.28). Orobanche cernua Loefl. and Loranthella deflersii (Tiegh.) S.Blanco & C.E.Wetzel were restricted to the dry zone (low elevation) only, while the other parasites were distributed across the surveyed region. Twenty-three host plants were identified throughout the study region. About 83% of them were phanerophytes and bioregional plants, with 91% being perennial species. The prevalent host plant family across all sites was Fabaceae, with Nicotina glauca Graham being the most important host species (IVI = 32.44%). P. austroarabica and Plicosepalus curviflorus Tiegh. preferred Vachellias as host plants, while Vachellia flava (Forssk.) Kyal. & Boatwr. was the heavily infected host by P. austroarabica. P. austroarabica had a broad spectrum of host range (13 host plants), while O. cernua had a very narrow host range (only Rumex nervosus Vahl). Individual parasite and host species were markedly more abundant in the wet zone than in the low-altitude dry zone. Further research is needed to fully understand such distinctive groups of plants and their negative and positive ecological consequences on plant biodiversity and natural ecosystems.

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Section: Discussionsupporting

confidence: 94%

Ecology and Diversity of Angiosperm Parasites and Their Host Plants along Elevation Gradient in Al-Baha Region, Saudi Arabia

Al-Robai

2023

Diversity

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“…The relatively high contribution of these phytogeographical groups reflects the general arid climate pattern of the Arabian Peninsula [47]. The life form of identified species, denoted as chamaephytes and phanerophytes, and growth habits such as herbaceous and shrub forms, dominated all surveyed elevations; these patterns are very common in arid environments, especially in the north-west region of the Arabian Peninsula, in agreement with other studies [48,49].…”

Section: Discussionsupporting

confidence: 89%

Diversity of Indicator and Dominant Plant Species along Elevation Gradients in Prince Mohammad Bin Salman Nature Reserve, KSA

Al-Bakre

2023

Diversity

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It is essential to protect and preserve biodiversity, especially in habitats in which natural resources are scarce. The differing flora and vegetation distribution on the broad, arid landscape at the Crown Prince Mohammed Bin Salman Nature Reserve has yet to be investigated. Based on GPS coordination and the transitional zone of plant communities, 48 symmetric plots of 50 × 50 m2 were distributed evenly over six elevations. In this study, we recorded 70 species in 33 families and elucidated floristic traits correlated with elevation. High species richness was recorded for the families Fabaceae, Poaceae, Asteraceae, and Chenopodiaceae. High numbers of chamaephyte and phanerophyte species were observed. In the chorotype, the mono-regional component contained 47% of the species, the bi-regional component 35.7%, and multi-regional and worldwide species comprised 10% and 7%, respectively. This study noted the growth habits of 23 herbs, 15 shrubs, 10 trees, and a single species of grass, vine, climber, and mistletoe. Diversity indices, indicator species, dominant plant communities, and soil profiles were compared for the defined zones of elevation. Alpha and beta diversity were high at elevations of ≥1000, 800, and ≤100 ma.s.l., compared to elevations of 600 m, 400 m, and 200 m. The highest species richness and species turnover were recorded at elevations of ≥1000, 800, and ≤100 m, while species evenness was greater at elevations of 600, 400, and 200 m. Vegetation analyses and indicator species (based on relative abundance) showed species variation with elevation. Species domination was influenced by physical soil structure and soil chemistry. Microclimates, including temperature and relative humidity variations, were found to be a significant driver in the ecosystem, resulting in varying plant diversity and species distribution at different elevations. Through canonical correspondence analysis (CCA), we used an autocorrelation of elevations, plant species, and soil properties to identify three phytogeographic categories that were presumed to be a proxy of microclimate change: Category I: elevations 1000 m and 800 m, including Retama raetam, Zilla Spinosa, and Vachellia gerrardii linked with sandy soil; Category II: elevations 600 m and 400 m, including species Haloxylon salicornicum, Rhazya stricta, and Leptadenia pyrotechnica linked with enriched soils containing CaCO3 and HCO3 and having a clay texture; and Category III: elevations 200 m and 100 m, including Zygophyllum coccineum, Tamarix nilotica, and Hyphaene thebaica, which thrived in salinity and silt soils. The spatial vegetation patterns of the xeric environment and its transition zones in Prince Mohammed Bin Salman Nature Reserve were also documented. It is recommended that microclimate effects on species nominated for vegetation restoration or afforestation be considered for the optimal management of this important nature reserve.

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“…Field trips were carried on, during the period May 2014 to January 2018, Classifying all vascular plants in life-forms. The specimens were identified by Dr. Al-Gifri as well as by the utilization of the available literature for (1,3,4,5,6,7,8,11,13,14). Life forms of species were classified on the basis of life forms as defined by Raunkiaer (26 ).…”

Section: Methodsmentioning

confidence: 99%

Floristic diversity of Lawder District, Abyan Governorate, Yemen

Masdoos

Hussein

Algifri

2023

Univ. Aden J. Nat. and Appl. Sc.

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The present study provides a detailed depiction of the floristic composition of Lawder District which located in the Centre of Abyan between longitudinal range 45º 20¯ to 45º 50¯ E and latitudinal range 13º 00¯ to 14º 00¯ N, with and altitudinal range of 1000 masl to 2500masl. This work was carried out to identify the floristic composition in Lawder District. The floristic study of Lawder District indicated the presence of 243 species belonging to 154 genera and 58 families. The major families based on the number of species were Euphorbiaceae, Apocynaceae, Asteraceae, Poaceae, Fabaceae, Solanaceae, Capparaceae and Boraginaceous, The biological spectrum explains that Chamephytes (35.80%), were the dominant, followed by Therophytes (25.52%, Hemicryptophytes (20.16%), Phanerophytes (14.40 %), Geophytes (2.06%), parasite (1.65 %), and Epiphytes (0.41`%). The dominance of Chamaephytes and Therophytes reveals a thero-chamaephytic phytoclimate for the investigated area.The number of species was higher in the Herbs, which was represented by 52.27% of species, followed by the Shrubs 30.45%, Trees were represented by 13.17%, Lianas were represented by 2.90% and Parasite 1.23%.

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Floristic Diversity of Jabal Al-Ward, Southwest Tabuk Region, Kingdom of Saudi Arabia

Cited by 6 publications

References 54 publications

Ecology and Diversity of Angiosperm Parasites and Their Host Plants along Elevation Gradient in Al-Baha Region, Saudi Arabia

Ecology and Diversity of Angiosperm Parasites and Their Host Plants along Elevation Gradient in Al-Baha Region, Saudi Arabia

Diversity of Indicator and Dominant Plant Species along Elevation Gradients in Prince Mohammad Bin Salman Nature Reserve, KSA

Floristic diversity of Lawder District, Abyan Governorate, Yemen

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