Limestone quarrying activities have extremely strong environmental impact, since they imply vegetation clearing and loss of soil. A reclamation project was conducted in a limestone quarry of the Serra da Arrábida (southwest Portugal), a natural park with a dense evergreen sclerophyllous shrub community. The successive revegetation of quarry terraces results in distinct plant communities of different age and cover. In this work we examined five different terraces, which were revegetated at 3-year intervals, to evaluate the establishment and growth of introduced species as well as colonization and succession of natural vegetation.New revegetation techniques were also evaluated using three native species (Olea europaea var. silvestris, Pistacia lentiscus and Ceratonia siliqua). Different treatments were applied in a randomized block design to improve the revegetation process: (1) fertilization, to overcome growth limitation due to nutrient deficiencies; (2) mycorrhization, to improve nutrient uptake by plants, as well as their competitive capacity for other resources; (3) addition of a long-term water-holding polymer to reduce water stress. Growth and vigour of the plants was monitored and ecophysiological studies were conducted, comprising water relations and fluorescence measurements. The results of the first year revealed species-specific differences during the adaptation processes: O. europaea was the most robust species. C. siliqua was the most sensitive to the transplantation stress, but after the initial adaptation the highest growth rates were found in this species, where fertilization significantly increased growth rate. Survival rate during the first summer was high in all species, being lowest in C. siliqua and highest in O. europaea (95 and 98%, respectively).
Weitere Kapitel dieses Buchs durch Wischen aufrufen
- Restoration of Disturbed Areas in the Mediterranean — a Case Study in a Limestone Quarry
A. S. Clemente
P. M. Correia
A. I. Correia
- Springer Berlin Heidelberg
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