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Wind erosion is one of the most severe environmental problems in arid, semiarid, and dry sub-humid regions of the planet. This paper aimed to identify areas sensitive to wind erosion in Northeastern Algeria (Wilaya of Tebessa) based on empirical model using analytic hierarchy process, fuzzy analytic hierarchy process approaches, and geomatics-based techniques. Sixteen causative factors were used incorporating meteorological, soil erodibility, physical environment, and anthropogenic impacts as main available inputs in this approach. Weighted linear combination algorithm was adopted to combine all standardized raster layers. Area under curve value equal to 0.96 indicates an excellent accuracy for the proposed approach. Globally, wind erosion risk increases gradually from the North to South of the whole area. Besides, it was found that areas with slight, moderate, high, and very high risk covered 9.65%, 25.83%, 24.30%, and 40.22% of the total area, respectively. Our results highlighted the potential of additive linear model and free available medium resolution multi-source remote sensing data in studying natural hazards and disasters mainly under data-scarce or areas of difficult access in developing countries. In addition, restoration and re-vegetation activities of sensitive areas at high risk of wind erosion represent a challenge for researchers and decision-makers.

With an average annual rainfall below 150 mm, the steppe with emerges, constituting the transition between the arid steppes and the Saharan vegetation. The distribution of the vegetation is very irregular, which depends on the nature and structure of the soils. A soil study, based on observations and the sampling of 42 profiles, was carried out within a range of species located in the southern part of Naâma. The principal component analysis enables the identification of relationships between the different soil profiles and the species studied. The results obtained show that the woody steppe with occupies habitats characterized by a sandy-loamy to sandy and stony texture on the surface of carbonate crusts, often in the form of slabs with a variable carbonate content of 1.22 to 12.7% in certain types of soil; this element tends to be carried to a depth of 40 to 60 cm. In other types of soil, on the contrary, it remains distributed throughout the entire profile. Colonized soils are generally shallow and poor in organic matter, varying from 2 to 3.65%, with an alkaline pH ranging between 6.7 and 8.8. The measured electrical conductivity varies between 0.1 and 0.7 mS/cm. This variation largely depends on the texture of the soil, the bioclimate and the steppe vegetation. The results obtained enable the valorization of this species, which has a socio-economic and ecological role, as it practically adapts to the different types of soil of the steppe space.

For centuries, the Saharan oasis agro-systems of Adrar region have fed many generations, based on an original organization, based on the efficiency of drainage water on the diversification of crop systems in association with small livestock farming. The aim of the work is to describe the systemic typology of oasis livestock farming in the Adrar region (southwest Algeria). In order to assess the livestock typology, a series of surveys were conducted on 164 farms in the oases of the study region. The analysis reveals that the production system, traditionally aimed at subsistence agriculture. The dominant production system is an intensive system, characterized by intensive mixed food crops (Phoenicuculture, arboriculture, herbaceous crops: cereals, fodder, market gardening, industrial and condiment crops), in association with livestock farming mainly of small ruminants (goats and sheep). The livestock system is characterized by a family type, small in size in traditional management. It is generally managed in stalls and its feed comes mainly from fodder crops, domestic waste and by-products of palm groves. Family livestock farming can be an important source to ensure a certain production of animal origin (milk and meat) for family self-consumption. As a result, it can contribute to ensuring food security, family financial security and improving soil fertility in oasis farm plots.

This study focuses on the phytoecological characterization of Pistacia atlantica in the Saharan Atlas of Naâma (western Algeria). A floristic inventory, conducted through 32 field surveys, identified significant biological diversity. The results reveal a systematic structure composed of 103 plant species, distributed across 81 genera and 30 botanical families. This floristic richness testifies to the importance of diversity and ecological plasticity in this pre-forest community within the Saharan Atlas. The Pistacia atlantica community exhibits unique floristic diversity, combining endemic Mediterranean and Saharan species adapted to the arid bioclimatic environment. This drought-resistant and structurally rich vegetation constitutes a valuable biological resource requiring conservation measures in the face of anthropogenic and climatic threats.

The Saharan Atlas covers important plant resources spread over the plains, mountains, chotts, dayas and desert areas. It is geographically located in the most western part of the Saharan Atlas in the sub sector. An ethnobotanical survey was conducted with the local population (local healers, herbalists, connoisseurs and nomads) to have a better approach to the traditional use of medicinal plants in the Saharan Atlas. It has enabled a floristic inventory of 127 botanical taxa in medicinal spontaneous belong to 36 families and 100 genera plants. The analysis of the surveys shows that the Asteraceae (25%), the Poaceae and Fabaceae (9%) are the three most dominant cosmopolitan families in the floristic list. In general, preparations are commonly used infusion, maceration, infusion and decoction to treat gastrointestinal disorders, respiratory, circulatory, rheumatic pain, kidney, stones, haemorrhoids, lung cooling, indigestion, emmenagogue, upset ear, skin, wounds, constipation, vermifuge, vulnerary, painful menstruation, healing, upset stomach and skin disorder (wounds, burns and abscesses). The inventory is a source of information that contributes to knowledge of medicinal plants and a backup of expertise, from orality to literacy by establishing the monograph of medicinal plants and their uses. It can also be a database for the promotion of medicinal plants to discover new active ingredients used in pharmacology. Knowledge and use of spontaneous plants in therapy, requires increased awareness to preserve, enhance and use plant genetic resources against all factors of spontaneous disappearance of integrating these natural resources in the list of species protected.

The present study contributes to the identification of cropping systems applied to traditional argosystems in Naama region (southwest of Algeria). A series of farm surveys were conducted for 30 oases farmers using a semi-structured questionnaire on aspects related to systemic typology crops practiced in Moghrar and Tiout oases in Naama region. The obtained results showed a diversification of crops grown intensively in these oases. They are characterized by the practice of mixed food crops cultivation in underlying strata, associated with family-type livestock farming. Truly, the presence of 35 different crops: date palm cultivar, 5 forage crops, 16 market gardens and 13 fruit trees has been recorded. This oasis system represents an ancestral oasis heritage built and maintained by the local population owing to a careful management of natural resources.

In the southwestern part of Algeria, the stands of Atlas pistachio (Pistacia atlantica Desf.) constitute a special natural heritage. They are usually scattered between the steppe plains and the Saharan Atlas. This study was conducted with the aim of identifying the dendrometric characteristics of Atlas pistachio that could be indicators of good productivity. The aim is to investigate the influence of stationary factors (slope, exposure, geology) on the dendrometric characteristics of Pistacia atlantica. The results obtained on the dendrometric parameters of this species are very interesting. From a dendrometric approach, Pistacia atlantica is a large tree that can reach impressive dendrometric dimensions: 8 to 10 meters in height and a diameter often exceeding 100 cm. This dendrometric analysis allowed us to make a structural characterization of stands of Pistacia atlantica, which is an essential step in the management plan and the valuation in the medium or long term. This species of Pistacia atlantica deserves adequate measures of protection, especially in its natural environment. Therefore, a better knowledge of their potentialities, problems, and factors of the decline of this hardy species would contribute to the protection and the preservation to favour their regeneration, which would allow a better extension of this species.

The ecological study (phenology and daytime budget) of ruddy shelduck (Anatidae) at Lake Oglat Eddaira (Ain Ben Khlil), Southwest of Algeria, was carried out for three consecutive years from August 2017 to July 2020. While ruddy shelduck has the status of a sedentary species, it was found all year round, persisting at low numbers in mid-summer months (July–August). The numbers of ruddy shelduck began to increase from the first decade of September with the arrival of the wintering and breeding populations. High numbers of ruddy shelduck were mainly recorded between late January and early March. During our monitoring, the balance sheet of the rhythms of daytime activities was dominated by feeding in water and on banks (68%), followed by preening (16.77%), swimming (9.85%,), sleeping (4.67%) and flying (1.22%). Therefore, we can conclude that Oglat Eddaira wetland plays the role of a diurnal grazing ground for this Anatidae.

This work was being carried out in the steppe of remth (Hammada scoparia) in Oranian part of the Saharan Atlas (Tiout - south of Naama). The H. scoparia of Saharan group occupies the foothills south of the Saharan Atlas and glazes and hamadas of the northern part of the Sahara where it seems to find its optimum development. The objective of the study is the floristic and ecological characterisation of the steppe vegetation groups of H. scoparia after 4 years of enclosure grazing (Eg). For the past three decades, steppe of H. scoparia were completely overwhelmed, both in their structure and their operation by increasing the herd and the continued use of natural pastures using animal load significantly higher than the production potential of course, which is reflected by the reduction of their capacity for natural regeneration. Intervention measures that address this alarming situation are to foster the inverse process of degradation reconstruction and rehabilitation of degraded steppe rangelands by the technique of the Eg. The methodology involves a device that is composed of a series of transects that constitute a grid and allow to scan the whole website for Eg and part of the neighbouring paths. The results emphasise the interest and constructive impact of the Eg on plant diversity and the fight against the factors of degradation and desertification. This review highlights the importance of the technique of Eg for the rehabilitation and restoration of steppe rangelands in arid bioclimate.

(syn. , in Arabic: ) is a steppe species characteristic of the Saharan Atlas and belongs to the family Amaranthaceae. An ethnobotanical survey on was carried out in the local population of the Naâma region. Using 200 questionnaire forms, this ethnobotanical study made it possible to identify the different uses of the species against various health problems. The results show that is well known by the population for its therapeutic virtues, with a level of knowledge of 96% and a fidelity index of 42%. As many as 192 respondents reported its use against 18 conditions, including diseases of the digestive system, injuries, skin inflammation, diabetes, and scorpion stings, which occupy the first place with a rate of 43%. Leaves have an intraspecific use value of 55.6%, and decoction of the leaves followed by the powder alone or in combination is the most used preparation method. This steppe species deserves to be valued on a large scale for its socio-economic and ecological aspects but also for its therapeutic effects.