Ecophysiological responses of some Psammophytes at north Sinai and Siwa oasis

Abstract EN

The present investigation aimed at the study of the Eco physiological responses of some psammophytes at two different habitats; South El-Bardwil Lake and Siwa Oasis.

Physical and chemical properties of the soil were recorded.

The floristic composition of the two selected pilot areas was realized.

The chemical composition of some species was discussed in relation to climatic and edaphic factors.

The results indicated that: 1- South El- Bardwil Lake was dominated by Zygophyllum album community type, while the Khamisa sand dune was dominated by Cornulaca monacantha community type. 2-The annual species were highly represented in the El-Bardwil sand dune habitat. 3- The maritime influence has great impact on zonation pattern of vegetation in the coastal sand dunes. 4- Most of the perennials occupied the crest of dune at the two pilot areas. 5- Plant species have two modes of physiological adaptation to the environmental stresses; some species were electrolytic defendants while the other were non-electrolytic dependents in their adaptive responses to the prevailing conditions