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Tanta University (2018)

Red list of the endemic and near endemic plant species in Egypt

El-Khalafy, Mohamed Mahmoud Mohamed

Titre : Red list of the endemic and near endemic plant species in Egypt

Auteur : El-Khalafy, Mohamed Mahmoud Mohamed.

Etablissement de soutenance : Tanta University

Grade : Master of Science (MSc) in Botany 2018

Résumé
The present study aims to answer the following questions : 1- what are the numbers of endemic and near-endemic taxa in the Egyptian flora ?, 2- what are the reasons and justifications for addition or exclusion of taxa to or from the list of endemic and near-endemic taxa ?, 3- what are the conservation categories of endemics and near-endemics according to IUCN categories ?, 4- How we can make red list of these taxa ?, 5-what is the importance and goods of endemic and near-endemic taxa in the Egyptian flora ?, 6- what are the most scarce threats that threatened the endemic and near-endemic taxa in the Egyptian flora ?, 7- how we make conservation strategy for these taxa in the Egyptian flora ?. The list of the endemic and near-endemic taxa was prepared from literature reviewing, field trips and, herbaria consultation. The lists were analyzed in terms of taxonomic diversity, life, sex, and rarity forms, dimension, flowering activity, dispersal methods, economic potentiality, national geographical distribution, abundance, and threats. In addition, a herbarium collection for endemic and near-endemic was prepared to be kept in Tanta and Kafr El-Sheikh Universities Herbaria, also building up a computerized data base dealing with the botany, environment and economic importance of these plants. Many field visits were conducted to many locations in the study area during the period from summer 2015 to spring 2018. Plant specimens were collected from different sites all over Egypt. The list of endemic taxa in the present study includes 44 species belonging to 36 genera and 20 families arranged according to LAPGIII system, Dicotyledonous families are 17 (10 Archichlamydae and 7 Symptalae). The archichlamydic families are represented by 17 genera, 17 species, and 3 varieties ; while Sympetalic families are represented by 14 genera, 10 species, 1 variety and 5 sub-species. In addition, Monocotyledonous families are 3 represented by 5 genera, 7 species and one variety. The most represented families were Asteraceae (6 species = 13.6 % of the total taxa), Caryophyllaceae and Fabaceae (each of 5 taxa = 11.4 %), while the most represented genera are each of Silene and Veronica (3 taxa = 8.1 %), Allium, Bellevalia and Muscari (each of 2 taxa = 5.4 %). The total number of near-endemic species in the present study was 73 taxa, belonging to 58 genera and 28 families. Dicotyledonous families are 22 (12 Archichlamydae and 10 Sympetalae). The archichlamydic families are represented by 28 genera, 26 species, 6 varieties and 1 subspecies ; while Sympetalic families are 10 represented by 23 genera, 24 species, 1 variety and 1 sub-species. In addition, Monocotyledonous families are 6 represented by 7 genera, 12 species and 2 subspecies. The most represented families were Asteraceae and Fabaceae (each of 8 taxa = 11.0 % of the total near-endemics), Asparagaceae (6 taxa = 8.2 %), Apiaceae and Scrophulariaceae (each of 5 taxa = 6.8 %), while the most represented genera are Bellevalia and Allium (each of 4 taxa = 6.9 %), Convolvulus, Astragalus, Lupinus, Hypecoum, Nigella, Verbascum, Fagonia, and Leopoldia (each of 2 taxa = 2.7 %). For endemic taxa, 10 main habitats were identified in the study area : banks of water bodies, desert plains, depressions and wadis, sandy formations, alluvial and loamy soils, cultivated fields, mountains and hills, rocky surfaces, well surroundings and road sides. For near-endemics, 11 main habitats were identified in the study area : banks of water bodies, desert plains, depressions and wadis, sandy formations, alluvial and loamy soils, cultivated fields, mountains and hills, rocky surfaces, road sides, calcareous ground, ridges and fallow fields and waste ground.

Présentation étendue (EULC)

Page publiée le 12 février 2019