摘要
Soil salinization and degradation of the vegetation cover is a problem of international topicality, that arises particularly in arid and semi arid regions, of where part of our study sites, and for know their floristic diversity, we attempted achieve a floristic inventory in stations undergoing a dry climate and intense anthropic action particularly in the north-west of Algeria. A protected station was considered as controls. In the Mediterranean region, the reading surface varies from 100 m^2 to 300 m^2 in forest, and 50 m^2 to 100 m^2 in matorrals and a few square meters in lawns [1], and for our case, we used the readings method by transect with the plots （100 m^2）. The interpretation of the vegetation has been done using a multidimensional treatment AFC. The results prove that the flora of study sites shows a floristic richness, although human action and rigor of the Mediterranean climate seem to have a negative effect on vegetation by the proliferation of xeric species and halophytes and sometimes toxic. The results show that the flora of the study sites shows a rich flora formed by the combination of annual and perennial communities where Therophytes dominate other life forms and in terms biogeographic Mediterranean species take the first place of all identified species, while endemic species are poorly re-presented. The Protected Station of Dam Hammam Boughrara presents no significant difference compared to other stations which are not put in defending.
