Of the four national hunting reserves in Algeria, the Mounts of Tlemcen Moutas reserve http://reservebio-tlm.com,characterized by a large area, reliefs and a specific climate, implies significant floristic and faunist...Of the four national hunting reserves in Algeria, the Mounts of Tlemcen Moutas reserve http://reservebio-tlm.com,characterized by a large area, reliefs and a specific climate, implies significant floristic and faunistic richness. Currently, the coexistence of species, such asQuercus fagineasubsp. tlemcenensis(DC.) M.,Lonicera implexaL., Ruscus aculeatusL., indicates a forest dominant ecological atmosphere, although the region has experienced repeated fires during the 90’s. In this research, a phytoecologicaland syntaxonomical analysis is obvious. More than 300 species have been inventoried and indexed in more than 70 families and this shows the importance of phyto-diversity of the studiedregion. In the analysis of the phyto-ecological parameters, we could notice a regression of the vegetal cover in its diversity.展开更多
This work was completed on the study of the southern slope scrublands (matorrals) of Tlemcen region in the northwest of Algeria (Western Algeria). These scrublands are under various states of degradation, made up ...This work was completed on the study of the southern slope scrublands (matorrals) of Tlemcen region in the northwest of Algeria (Western Algeria). These scrublands are under various states of degradation, made up of Quercus ilex, Juniperus oxycedrus, Thymus ciliatus, Rosmarinus officinalis. The problems sought in this study are to give the actual position of vegetable cover and in particular that of the formations to matorrals currently existing in the southern slope of the area of Tlemcen, while being based on the phytoecological aspect of the vegetable groupings which constitute this inheritance. Sampling is the first phase of work based on the analysis of the spatial variations of the structure and composition floristic and considering the nature of the problem to be treated, the authors considered to be useful to use the method Zuricho Montpeli6raine developed at the point by Braun-Blanquet, the method usually used consists to collect all the plant species and to make the list of the species on a small square of surface 100 m2 (have it minimal). The floristic readings (150 on the whole) were taken according to the method of Braun-Blanquet. Our results show that there exists a therophytisation marked by a general invasion of annual species as show us as the synergistic action of the aridity and the anthropic action generated important modifications on the level of the vegetation in the dynamic direction. This advanced degradation leads a steppisation which results in a substitution of the elements of the matorrals by species more adapted much the xericity.展开更多
Through the Algerian orchid flora, several rare species remain endemic in the Maghreb. This note on the orchids will enrich the already existing data on the area of Tlemcen. Currently, the coexistence of orchids and s...Through the Algerian orchid flora, several rare species remain endemic in the Maghreb. This note on the orchids will enrich the already existing data on the area of Tlemcen. Currently, the coexistence of orchids and species (such as Quercus faginea subsp. tlemcenensis (DC.) M., Lonicera implexa L. and Ruscus aculeatus L.) indicates an ecological environment of dominant forest. Nevertheless, the significant frequency of fires and human pressure is leading to erosion of this area orchids richness. This work enabled us to establish a complete inventory of the orchids species that exist, with an estimate of the populations and a taxon illustration for each of them. Fourteen species (14) were indexed, during the period of spring 2011 only, in this reserve and the scoured areas which do not exceed 2000 ha, representing 29% of the total Algerian orchids species. Among the rare taxa signed ourselves: Ophrys subfusca subsp. battandieri (Rchb.) Batt. and Dactylorhiza durandii (Boiss. and Reuter) M. Lainz in Oranie (O)*展开更多
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 floristi...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.展开更多
文摘Of the four national hunting reserves in Algeria, the Mounts of Tlemcen Moutas reserve http://reservebio-tlm.com,characterized by a large area, reliefs and a specific climate, implies significant floristic and faunistic richness. Currently, the coexistence of species, such asQuercus fagineasubsp. tlemcenensis(DC.) M.,Lonicera implexaL., Ruscus aculeatusL., indicates a forest dominant ecological atmosphere, although the region has experienced repeated fires during the 90’s. In this research, a phytoecologicaland syntaxonomical analysis is obvious. More than 300 species have been inventoried and indexed in more than 70 families and this shows the importance of phyto-diversity of the studiedregion. In the analysis of the phyto-ecological parameters, we could notice a regression of the vegetal cover in its diversity.
文摘This work was completed on the study of the southern slope scrublands (matorrals) of Tlemcen region in the northwest of Algeria (Western Algeria). These scrublands are under various states of degradation, made up of Quercus ilex, Juniperus oxycedrus, Thymus ciliatus, Rosmarinus officinalis. The problems sought in this study are to give the actual position of vegetable cover and in particular that of the formations to matorrals currently existing in the southern slope of the area of Tlemcen, while being based on the phytoecological aspect of the vegetable groupings which constitute this inheritance. Sampling is the first phase of work based on the analysis of the spatial variations of the structure and composition floristic and considering the nature of the problem to be treated, the authors considered to be useful to use the method Zuricho Montpeli6raine developed at the point by Braun-Blanquet, the method usually used consists to collect all the plant species and to make the list of the species on a small square of surface 100 m2 (have it minimal). The floristic readings (150 on the whole) were taken according to the method of Braun-Blanquet. Our results show that there exists a therophytisation marked by a general invasion of annual species as show us as the synergistic action of the aridity and the anthropic action generated important modifications on the level of the vegetation in the dynamic direction. This advanced degradation leads a steppisation which results in a substitution of the elements of the matorrals by species more adapted much the xericity.
文摘Through the Algerian orchid flora, several rare species remain endemic in the Maghreb. This note on the orchids will enrich the already existing data on the area of Tlemcen. Currently, the coexistence of orchids and species (such as Quercus faginea subsp. tlemcenensis (DC.) M., Lonicera implexa L. and Ruscus aculeatus L.) indicates an ecological environment of dominant forest. Nevertheless, the significant frequency of fires and human pressure is leading to erosion of this area orchids richness. This work enabled us to establish a complete inventory of the orchids species that exist, with an estimate of the populations and a taxon illustration for each of them. Fourteen species (14) were indexed, during the period of spring 2011 only, in this reserve and the scoured areas which do not exceed 2000 ha, representing 29% of the total Algerian orchids species. Among the rare taxa signed ourselves: Ophrys subfusca subsp. battandieri (Rchb.) Batt. and Dactylorhiza durandii (Boiss. and Reuter) M. Lainz in Oranie (O)*
文摘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.