干旱区生态环境知识资源中心

The post-agricultural succession was evaluated in an abandoned military base in the Nile Delta region. Two species new to this region had been recorded (I floga spicata and Cutandia dichotomo). Their presence was related to transported building materials and/or deterioration of the soil variables towards desert soil. The heavy growth of Tamarix nilotica and Conyza dioscoridis populations in the study area was related to their adaptation to significant substrate alterations, while these changes inhibit re-establishment of other long lived species. Under associated growth both populations were denser and their size distributions were biased towards small individuals. The reverse was found under non-associated growth. These findings are discussed in the light of the inhibition model and competition theory.