Environmental correlates of species distribution in arid desert ecosystems of eastern Egypt

Vegetation associations in the Ougarta Mountains and dayas of the Guir hamada, Algerian Sahara

“…Numerical classification has been reported as a powerful tool in detecting fine patterns of floristic variation (Abd El-Ghani, 1998;Kadmon & Danin, 1999) and is confirmed in the present study. Successful long-term monitoring of habitats is best achieved when using quantitative analysis for precise determination of changes in desert vegetation over time.…”

“…Data were analysed with PC-ORD (McCune & Mefford, 1999). Use of multivariate techniques for recognizing vegetation units is now accepted as a common procedure (El-Ghareb & Hassan, 1989;Abd El-Ghani, 1998Hegazy et al, 1998). Results were used to refine the phytosociological tables and interpret them by taking into account the sociological behaviour of the species in similar habitats.…”

“…It may depend on simple qualitative techniques such as the Braun-Blanquet table sorting method (Braun-Blanquet, 1939;Guinochet, 1951;Lemée, 1953;Leredde, 1957;Bornkamm & Kehl, 1990;Kaabèche & Gharzouli, 1993Peinado et al, 1995;Quézel et al, 1995;Abd El-Ghani, 1996) or be based on floristic list assemblages related to discrete habitat types (Kassas & Imam, 1954;Kassas & Girgis, 1965) with an emphasis on phytogeographical plant distribution (Barry & Celles, 1973) and geobotanical studies . More complex numerical, quantitative methods include cluster analysis, two-way indicator species analysis (TWINSPAN) and correspondence analysis (Noy-Meir et al, 1970;Ward et al, 1993;El-Demerdash et al, 1995;Cowlishaw & Davies, 1997;Abd El-Ghani, 1998).…”

Spatial distribution and soil characteristics of the vegetation associated with common succulent plants in Egypt

“…Shaltout et al (2004) identified Zygophyllum coccineum-Zilla spinosa communities along the Egyptian Red Sea coastal lands. Several studies recognized Zygophyllum coccineum as a community associated with Zilla spinosa (Kassas and El-Abyad, 1962;Kassas and Girgis, 1965;Abd El-Ghani, 1998). Monotypic communities of the dominant species were recorded (Fossati et al, 1998 in sand contents and calcium carbonates, with low values of salinity.…”

Life-form spectra of Brazilian cerrado sites

“…This system has been widely applied in many vegetation types to classify plant species in life-forms, as, for example, deserts (Qadir & Shevty 1986;El-Demerdash et al 1994;El-Ghani 1998), meadows (Beaman & Andresen 1966), Mediterranean vegetation (Dimopoulus & Georgiadis 1992; Christodoulakis 1996), prairies (Stalter et al 1991), savannas (Cole & Brown 1976;Sarmiento & Monasterio 1983), temperate forests (Buell & Wilbur 1948;Gao & Chen 1998), tundra (Raunkiaer 1934), tropical grasslands (Shankar et al 1991), and tropical rain forests (Cain et al 1956). …”