Revue internationale d'écologie méditerranéenne International ...

144
◆ M. A. SHEIKH, M. E. MADY & K. H. SHALTOUT
Species Life form Chorotype Habitat I II III IV V VI P %
POLYGONACEAE
Polygonum equisetiforme Sibth.et Sm. Ch Me,IT L,S,B,T,O 0.4 1 0.4 1.0 46.3
Rumex dentatus L. Th Me,IT,ES L 0.1 1.6 4.9
Rumex pictus Forssk.
RANUNCULACEAE
Th Me,ES B,T 0.4 0.1 7.3
Anemone coronaria L.
RHAMNACEAE
Ge Me W,B,T,O 0.1 2.4
Ziziphus spina-christi (L.) Desf.
SOLANACEAE
Ph SU, Me,ITSA L 0.4 2.4
Nicotiana glauca Grahm. Ch Trop L,W,B,T,O 0.4 5.0 2.0 34.1
Solanum elaeagnifolium Cav.
TAMARICACEAE
He Trop B,T 2.1 3.3 12.2
Tamarix nilotica (Ehrenb.) Bge. Ph SA L,S,W,B,T,O 10 0.4 10.1 21 1.0 1.0 70.7
Tamarix aphylla (L.) Karst.
APIACEAE
Ph Me L 0.1 2.4
Pimpinella anisum L.
URTICACEAE
Th Me B,T 0.8 4.9
Urtica pilulifera L.
ZYGOPHYLLACEAE
Th Me,IT,ES B 0.1 2.4
Zygophyllum album L.f. He SU L,D 0.2 4.9
Table 1. Characteristics of the recorded species in the down-stream part of Wadi Gaza.
Life forms are: Ph: phanerophyte, Ch: chamaephyte, He: hemicryptophyte, Ge: geophyte and helophyte, Th: therophyte and P: parasite. Chorotypes are: Me: Mediterranean, ES:
Euro-Siberian, IT: Irano-Turanian, Cosm: Cosmopolitan, SA: Saharo-Arabian, SU: Sudanian, Trop: Tropical, Cult: Cultivated. Vegetation units are: I: Arthrocnemum macrostachyum,
II. Mesembryanthemum crystallinum, III. Tamarix nilotica – Arundo donax, IV.Tamarix nilotica, V. Alhagi graecorum - Xanthium spinosum, VI. Centaurea ammocyanus - Atractylis
carduus. Habitats are: T: wadi terrace, O: wadi slope, B: wadi bed, L: bank of mouth pond, W: water edge of mouth pond, S: sand sheets, D: sand dune.
Fig 2. Layer diagram and
chorotype spectrum of the
vegetation of the downstream
part of wadi Gaza. M:
monoregional, B: biregional and
P: pluriregional species.
ecologia mediterranea, tome 29, fascicule 2, 2003