influence of altitude and slope on the density of Asphodelus microcarpus Salzm & Viv. in the Mount of Tessala (Western Algeria)

The change in the structure of species communities along environmental gradients is a privileged field of ecology as it allows exploring a continuous progression of situations often in a small area, in this context, we are interested in studying the impact of altitude and slope on the density and the recovery rate of Asphodelus microcarpus population in mountainous ecosystem. Asphodelus microcarpus is an ecological model, which allows us to have an idea about the degree of degradation in mountainous ecosystem, the density increases with advanced degradation stage. Analysis of variance revealed a highly significant difference (P = 0.001) between the 20 selected stations. The principal component analysis revealed that the density is important in low altitudes around 750 m where the slopes are average, this correlation is the result of human pressures that weaken the mountain of Tessala.International Journal of Environment Vol.5(3) 2016, pp.43-56</p

A new locality of an invasive Gecko, Cyrtopodion scabrum (Heyden,1827) in Algeria (Squamata: Gekkonidae)

The Rough Bent-toed Gecko Cyrtopodion scabrum (Heyden,1827) was recently recorded in Algeria, from the east part of countries. In this note, another&nbsp; new locality of this species in the central Algeria (Ghardaïa region), situated at 450 km west form the last locality, based on one specimen fond in Bord&nbsp; of Sebkhet. C. scabrum is listed as an invasive species and it was reported as a desert species, in our finding it was recorded in an important wetland&nbsp; (Sebkhet El Melah) which is classified in the Ramsar list in 2004, this statement proves once again the ecological plasticity of this species

Contribution à l’étude de la biodiversité floristique dans un écosystème montagneux. Cas de versant sud de monts de Tessala (Algérie occidentale)

Les montagnes sont très sensibles à tout déséquilibre écologique causé par l’activité humaine ou d’une cause naturelle. Ce sont les plus vulnérables aux changements climatiques dans l’atmosphère. Notre travail consiste à inventorier l’ensemble des espèces végétales dans le versant sud du mont de Tessala selon un gradient altitudinal. Asphodelus microcarpus, est une forme de vie dominante et une conséquence de la dégradation des écosystèmes forestiers dans le versant sud de monts de Tessala. L’étude statistique basée sur l’analyse factorielle des correspondances «AFC», a révélée une corrélation avec d’autres espèces telles que : Calycotome spinosa Link., Chaemerops humilis L., Urginea pancration (Steinh) Phil. et Asparagus acutifolius L., ces derniers font partie des formations garrigues qui évoluent sur des sols faiblement calcaires. Cette alliance est la conséquence de l’action anthropozoïque qui se déroule dans cette région.The mountains are very sensitive to ecological imbalance caused by human activity or natural causes. These are the most vulnerable to climate change in the atmosphere. Our job is to inventory all plant species in the southern slope of Mount Tessala by an altitudinal gradient. Asphodelus microcarpus is a dominant life form and a consequence of the degradation of forest ecosystems in the southern slopes of mountains Tessala. The statistical study based on correspondence analysis “ FAC ”, revealed a correlation with other species such as Calycotome spinosa Link Chaemerops humilis L., Urginea pancration (Steinh) Phil.. and Asparagus acutifolius Contribution à l’étude de la biodiversité floristique dans un écosystème montagneux Cas de versant sud de monts de Tessala (Algérie occidentale) L., they are part of scrubland formations that evolve on weakly calcareous soils. This alliance is the result of anthropozoic action taking place in this region

Moorish Viper, Daboia mauritanica (Gray, 1849) (Squamata, Viperidae), in Algeria: new provincial records, range extension, and an update on its distribution

 Daboia mauritanica (Gray, 1849), Moorish Viper, is native to North Africa. We update the distribution map for this species in Algeria, providing 19 new locality records, filling distribution gaps and significantly expanding the species’ known range. Our updated distribution map reveals a widespread presence of the species in northern Algeria, extending south into the northern Sahara. We note that some historical records in certain provinces remain unconfirmed and/or questionable, indicating the need for further investigation. Our findings underscore the importance of collaboration between researchers and citizen scientists in Algeria