Variations in Vegetation Structure, Species Dominance and Plant Communities in South of the Eastern Desert-Egypt

  • Fawzy SALAMA Assiut University, Faculty of Science, Botany Department, Assiut University Street, Assiut 71516
  • Monier ABD EL-GHANI Cairo University, Faculty of Science, Botany Department, 12613 Giza, Cairo
  • Mohamed GADALLAH Assiut University, Faculty of Science, Botany Department, Assiut University Street, Assiut 71516
  • Salah EL-NAGGAR Assiut University, Faculty of Science, Botany Department, Assiut University Street, Assiut 71516
  • Ahmed AMRO Assiut University, Faculty of Science, Botany Department, Assiut University Street, Assiut 71516

Abstract

For two successive years, the floristic diversity and vegetation composition in the southern part of the Eastern Desert ofEgypt were investigated through four transects (3 crossing the Eastern Desert and one along the Red Sea). The data collected from 142 stands covering the study area included the species composition, functional groups, chorology and occurrences (Qvalues). A total of 94 plant species belonging to 33 different families were recorded, with Asteracea, Zygophyllaceae, Fabaceae,Poaceae, Chenopodiaceae and Brassicaceae as the largest families. Shrubs represented the largest functional group (39.4%), while perennial herbs represented the smallest ones (12.8%). Species occurrence (Q-value) revealed that Zilla spinosa, Acacia tortilis subsp raddiana, Morettia philaeana, Caroxylon imbricatum, Zygophyllum coccineum and Citrullus colocynthis had wide ecological range of distribution (dominant species, Q-values 0.2). Saharo-Arabian chorotype was highly represented (72.6 %) in the flora of this area, eventually as mono, bi or pluriregional. Classification of the data set yielded 7 vegetation groups included: (A) Zilla spinosa-Morettia philaeana, (B1) Zilla spinosa-Citrullus colocynthis-Morettia philaeana, (B2) Zilla spinosa, (C1)Zygophyllum album-Tamarix nilotica, (C2) Zygophyllum coccineum-Tamarix nilotica, (D1) Zilla spinosa-Zygophyllum coccineum and (D2) Zilla spinosa-Acacia tortilis subsp. raddiana-Tamarix aphylla-Balanites aegyptiaca. Certain vegetation groups were assigned to one or more transects. Detrended Correspondence Analysis (DCA) revealed that electrical conductivity, sodium, potassium, calcium, magnesium, chlorides, moisture content, sulphates, pH, organic matter and gravel were the soil variables that affect the species distribution in this study.

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Author Biographies

Fawzy SALAMA, Assiut University, Faculty of Science, Botany Department, Assiut University Street, Assiut 71516
Prof.in Plant Ecology, Botany Department, Faculty of Science, Assiut University
Monier ABD EL-GHANI, Cairo University, Faculty of Science, Botany Department, 12613 Giza, Cairo
Prof.in Plant Ecology, Botany Department, Faculty of Science, Cairo University
Mohamed GADALLAH, Assiut University, Faculty of Science, Botany Department, Assiut University Street, Assiut 71516
Prof.in Plant Ecology, Botany Department, Faculty of Science, Assiut University
Salah EL-NAGGAR, Assiut University, Faculty of Science, Botany Department, Assiut University Street, Assiut 71516
Prof.in Plant Taxonomy, Botany Department, Faculty of Science, Assiut University
Ahmed AMRO, Assiut University, Faculty of Science, Botany Department, Assiut University Street, Assiut 71516
Assistant lecturer Botany Department, Faculty of Science, Assiut University
Published
2014-03-12
How to Cite
SALAMA, F., EL-GHANI, M. A., GADALLAH, M., EL-NAGGAR, S., & AMRO, A. (2014). Variations in Vegetation Structure, Species Dominance and Plant Communities in South of the Eastern Desert-Egypt. Notulae Scientia Biologicae, 6(1), 41-58. https://doi.org/10.15835/nsb619191
Section
Research article