Characterization of the central and marginal ecological habitat of a rare medicinal species in Tunisia: Case of Ruscus hypophyllum L.
Keywords:
tunisia, Ruscus hypophyllum, central habitat, marginal habitat, environmental factorsAbstract
Ruscus hypophyllum is exploited as an ornamental species by local people and by visitors to the region during walks. The natural distribution of Ruscus hypophyllum, which has been steadily decreasing over the last few decades, is threatened by various anthropic pressures, which are increasingly reducing the natural regeneration capacity of the species. The study of the ecological habitat is essential to have a good knowledge of the autoecology of this species in order to determine the conditions in which it develops and to set up appropriate management rules. Indeed, Ruscus hypophyllum prefers clay soils, rich in nitrogen and with a C/N ratio higher than 10. The soils it prefers are acidic pH (3.3 - 7.3). According to the results obtained, this species is fairly resistant to summer drought (Tmax = 44°C). In the Kroumirie, the presence of Ruscus hypophyllum is rare above 650 m altitude, whereas it is regularly found in riparian situations, between 50 and 650 m, with a maximum around 450 m. The results obtained show that this species has an affinity for low slopes (0-10%).
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