Ecologie et environnement

Permanent URI for this collectionhttps://dspacee.univ-temouchent.edu.dz/handle/123456789/750

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Etude d’activité anti-oxydante et activité antibactérienne des trois plantes médicinales (Artemisia absinthium, Artemisia Herba Alba, Mentha pulegium) de la région d’Ain Témouchent
(2025) SIDI ALI CHERIF, Nesrin; OUELD KADI, Rym; RAHMANI, Khaled
This study aims to investigate the antibacterial and antioxidant activities of essential oils derived from three aromatic medicinal plants: Artemisia absinthium (white wormwood), Artemisia herba alba (herbaceous wormwood), and Mentha pulegium (pennyroyal). The essential oils were extracted via hydrodistillation. The antioxidant activity, assessed using the FRAP method, revealed a highly promising antioxidant effect for the studied oils. The IC50 values obtained were 0.18 mg/ml for Artemisia absinthium, 1.43 mg/ml for Artemisia herba alba, and 1.51 mg/ml for Mentha pulegium, which are relatively close to the IC50 value of BHT, although the antioxidant capacity remains lower than that of ascorbic acid (vitamin C). The antibacterial activity was evaluated using the disk diffusion method against nine bacterial strains, including five Gram-negative (E. coli ATCC 25922, P. aeruginosa Cip A22, P. aeruginosa ATCC 27853, C. freundii ATCC 13316, K. pneumoniae ATCC 13883) and four Gram-positive (S. aureus ATCC 43300, S. aureus ATCC 25923, S. aureus ATCC 33862, B. cereus ATCC 10876) strains. All tested oils exhibited inhibitory activity against all strains, with sensitivity ranging from moderate to very high. The results demonstrated varying antibacterial activity depending on the essential oils and the tested microorganisms. The essential oils of Artemisia herba alba and Mentha pulegium showed high efficacy against Pseudomonas aeruginosa and Staphylococcus aureus, while the essential oil of Artemisia absinthium displayed notable activity against Citrobacter freundii and Bacillus cereus. These findings highlight the significant potential of essential oils as natural alternatives to conventional antibacterial agents. However, further research is needed to elucidate the mechanisms of action and to explore the potential therapeutic applications of these essential oils.
Evaluation de la conformité de l’eau destinée à l’arrosage des espaces vert dans la région de Ain Témouchent
(2021) RAHMANE, Aya; BOUGHALEM, Mostafia
In the municipality of Aïn Témouchent, the irrigation of urban green spaces relies mainly on groundwater (wells) and tap water. The quality of irrigation water is a key factor for plant health and soil sustainability. This study aims to assess the quality of two water sources used for irrigating the Lalla Khadidja Garden, which is managed by the local municipality (APC). Samples were taken from a well and a tap water point, and subjected to both physico-chemical and microbiological analyses. The results were compared against Algerian and international standards. The analyses revealed that both water types are microbiologically safe. From a physico- chemical perspective, tap water was found to be generally suitable for irrigation. However, the well water contained elevated levels of salinity-related elements, which could impact soil fertility if used continuously over time. This research highlights the importance of regular monitoring of irrigation water quality in urban areas to ensure optimal plant development and long-term soil health.
TOPIC: Combined effect of climate change and anthropogenic pressure on plant biodiversity in the Ain Temouchent region, case of El Amria
(2025) IKRELEF, Amina Ferial; AMARA, Mohamed
This study aims to assess the combined effects of climate change and anthropogenic pressure on plant biodiversity in the Aïn Témouchent region, more precisely in the communen of El Amria. The phytoecological approach was adopted, by carrying out floristic surveys on homogeneous spaces. At the stationary scale, 11 sites were studied by applying the quadrat method. On the cartographic level, we carried out a diachronic analysis of land use between the years 2015 and 2025. The results revealed a regression of certain plant species and a degradation of natural habitats, linked to unplanned agricultural activities and urban expansion. In addition, climatic variations, including rising temperatures and falling rainfall, have impacted floristic distribution. The study recommends the implementation of sustainable management strategies to preserve plant biodiversity and local ecosystems.
RainFlow
(2025) DARDOUR, Bouchra; MEDAR, Nesrine; BOUGHALEM, Mostafia; KHALFA, Ali; HANDAOUI, Mahfoud
In recent years, Algeria in general—and the wilaya of Aïn Témouchent in particular—has been facing serious challenges related to water scarcity due to climate change and decreasing rainfall levels. In this context, the continued use of potable water for irrigating green spaces adds further pressure on already limited resources, especially in urban areas. This study proposes a practical and sustainable solution by designing a rainwater harvesting and reuse system for the irrigation of “Lalla Khadidja” Park, located in Aïn Témouchent and covering an area of 1.769 hectares. The proposed system collects rainwater from impermeable surfaces and green areas, storing it in à 1890 m3 closed tank, supplemented by an open basin of 400 m3. A drainage network is also included, capable of handling a peak flow of 46.56 L/s. Furthermore, an irrigation network has been designed using both rotating and fixed sprinklers, controlled by a centralized system and electric valves to adapt watering schedules to actual needs and climatic conditions. The total annual water requirement is estimated at 2905.984 m3, largely covered by harvested rainwater, with a secondary contribution from an existing groundwater well. The study concludes that the proposed system effectively reduces reliance on potable water and provides a sustainable water resource for green space irrigation, with potential for replication in other urban development projects.
Impact des espaces verts urbains sur la qaulité de vie des habitants
(2025) BENZINA, ABDERRAHIM; OULDKADI, MOSTAFA EL – HABIB; BELHACINI, Fatima
Urbain green spaces play a fundamental role in improving people' squality of life, particularly in expanding urban areas such as the wilaya of Aïn Témouchent. These spaces, whether public gardens or squares, are the lungs of the city. They provide places for relaxation, leisure and intergenerational encounters. They also have a positive effect on the mental and physical health of residents, by reducing stress. In the wilaya of Aïn Témouchent, despite some land scaping efforts by local authorities, the distribution of green spaces remains uneven and often insufficient to meet the growing needs of the urban population. Some neighbor hoods are sorely lacking in accessible green areas, accentuating socio-spatial inequalities and diminishing the quality of the living environment. The creation and enhancement of green spacesis essential to meet the environmental and social challenges facing the region. Involvingcitizens in the management of these spaces, as well as strengthening the technical capabilities of local authorities, represent important levers for sustain ably improving urban well-being in the wilaya of Aïn Témouchent.
Réhabilitation et entretien des forêts récréatives de la wilaya « forêt de Rachgoun »
(2025) Sellaf, Saïd; BOUGHALEM MOSTAFIA, KASMI
The Rachgoun Recreational Forest constitutes a valuable natural heritage and a recreational space for local residents and visitors. However, this forest faces several challenges, including ecosystem degradation, increasing urbanization, and a lack of adequate maintenance. This thesis aims to examine strategies for maintaining, restoring, and rehabilitating this forest area to preserve its biodiversity and ensure its sustainability. First, an analysis of the current state of the forest will be conducted, identifying the main issues encountered, such as deforestation, soil erosion, and pollution. We will then propose concrete actions to address these problems, including reforestation with native species, the establishment of protected areas, and the organization of educational activities to raise public awareness of the importance of environmental protection. This work will also highlight the importance of participatory management, involving local communities and various stakeholders in the rehabilitation process. By integrating ecosystem-based approaches and sustainable practices, this thesis aims to provide an effective framework for the preservation and enhancement of the Rachgoun Recreational Forest, thus ensuring a balance between recreation and environmental protection for future generations.
Etude du comportement alimentaire des patients atteints de la maladie de CROHN au niveau du service des maladies gastro-intestinales (Hôpital Ahmed Medeghri, Ain Témouchent)
(2025) Guelai, Narimene; Hamdad, Kawthar; ZITOUNI, Amel
CROHN’s disease is a chronic inflammatory condition of the gastrointestinal tract that significantly affects patients’ quality of life, both physically and psychologically. Among the many aspects of its management, nutrition plays a central role. This study aims to explore and analyze the dietary behaviors of hospitalized patients diagnosed with CROHN’s disease, focusing on the relationship between their eating habits and individual characteristics such as age, gender, weight, medical history, and symptomatology. The research was conducted on a sample of 50 hospitalized patients, including 30 men and 20 women, aged between 19 and 73 years. Data were collected through a structured questionnaire addressing various dimensions: general eating habits, adherence to specific diets, food restrictions, preferred or avoided foods, and the influence of symptoms or medical advice on their dietary decisions. Findings reveal a considerable variability in dietary behaviors among patients. This diversity is mainly attributed to the unpredictable and fluctuating nature of the disease, in addition to personal factors such as sex, age, weight, disease history, and the psychological relationship with food. While some patients follow diets recommended by healthcare professionals, others rely on personal experience, adjusting their diet based on perceived tolerance to certain foods. Furthermore, disease activity—whether in flare-up or remission—significantly shapes dietary choices and intake. The study highlights that no universal diet can be applied to all individuals living with CROHN’s disease. Each patient develops a unique dietary strategy, often guided by trial-and- error experiences and personal observations. This underlines the need for personalized and multidisciplinary nutritional management that considers both medical recommendations and individual needs. In conclusion, nutrition should be regarded as a fundamental pillar in the comprehensive care of CROHN’s disease, not merely as a supportive aspect. An individualized, patient-centered approach is essential to improve comfort, reduce complications, and enhance treatment outcomes for those affected by this chronic condition.
Plantes médicinales et pratiques thérapeutiques traditionnelles pour les maladies respiratoires à Aïn Témouchent : approche ethnobotanique
(2025) DAHO, Dikra; CHIHAB, Mounir
Phytotherapy the use of medicinal plants remains deeply embedded in traditional local knowledge. This ethnobotanical study aimed to systematically document the medicinal species used to treat respiratory ailments in the Aïn Témouchent region (northwest Algeria), analyze preparation methods and usage patterns, and assess the sociocultural factors influencing these practices. A semi-structured survey was conducted among 100 informants across several communes. Data collected included demographics (age, gender, education level), source of ethnomedical knowledge, duration and frequency of use, plant parts employed, and perceived treatment efficacy. A total of 52 plant species from 26 botanical families were identified, with Thymus vulgaris, Rosmarinus officinalis, and Foeniculum vulgare among the most frequently cited. Mediterranean taxa and woody heliophilous plants were predominant. Leaves were the most frequently used plant part (46%), and traditional preparations such as infusions, decoctions, and inhalations were primarily made using fresh plant material (60%). Major drivers for phytotherapeutic use included accessibility, affordability, and the perceived absence of side effects compared to synthetic drugs. However, 15% of respondents reported adverse interactions between herbal and pharmaceutical treatments, indicating the need for medical monitoring and awareness. Users also reported a notable effectiveness of medicinal plants in treating conditions such as bronchitis, asthma, and chronic cough, justifying sustained use across generations. This study calls for scientific validation, sustainable management, and cultural preservation of traditional plant-based knowledge systems, especially in regions where modern healthcare access is limited.
Contribution à l’étude de la composition biochimique et de la contamination métallique de la faune et la flore marine du secteur Ouest du littoral algérien : Cas du peuplement de la saupe Sarpa salpa (Linnaeus, 1758) et de l’herbier à Posidonia oceanica (L.) Delile, 1813 au niveau de la baie de Béni-Saf
(2024) SOUSSI, Fayçal
Les incendies de foret dans la région d’Ain Temouchent : construction d’un indice de risque d’incendies (Cas madagh).
(2021) KRATTOU, issad; BARDADI, Abdelkader
Each summer, it is the same scenario of hectares of forest going up in smoke in the wilaya of Oran. Reducing the number of fires or stopping its spread is based on knowledge of the forest fire protection system. This study shows that during the period (2010-2016), 524 outbreaks were reported and an area of 3172.5 ha was burnt, the most affected being the forest. The most affected cities are Boutlelis and Arzew. 5 The year that recorded the biggest losses was in 2014. The conservation of the forests of the wilaya of Oran carried out a vast program of forest fire protection, a network of forest tracks (1,050 km) (238ha) and 56 water points, this network seems insufficient. Monitoring is done by 13 lookout posts and 13 mobile forest brigades. Silvicultural works are generally
Etude de l’infestation des agrumes par les cochenilles dans la région d’Ain Témouchent
(2023) ZOUBIR, SOUAD; ILIAS, FAIZA
The objective of this study, conducted in the region of Aïn Témouchent (Algeria), in three citrus farms, is to determine the diversity and abundance of scale insects. The infestation carried out between March 5 and June 1, 2023 revealed the presence of two species of scale insects: Parlatoria ziziphi and Planococcus citri belonging to two main families: Diaspididae and Pseudococcidae. The family Diaspididae is dominant in terms of species, with two species present. The results of this study indicate that Parlatoria ziziphi (Diaspididae) is the most widespread species in the three citrus plots. However, parasitism, predation, and mortality play crucial roles in regulating scale insect individuals. Based on the study of the distribution of scale insect infestation, we can conclude that these pests are mainly active on the leaves, especially on the upper part of them, rather than on the branches. With regard to orientation, scale insects show a very marked preference for the first two farms studied among the three plots studied.
Etude comparative de l’activité antioxydant de l’extrait brut de Thymus ciliatus ssp euciliatus et la ssp coloratus.
(2023) KHELOUFI, Yasser; KHOLKHAL, Fatima
In the context of nutrition and health, antioxidants play an essential role. And phenolic compound, which are present in many foods, are known for their beneficial properties. Antioxidants work by neutralizing free radicals, unstable molecules responsible for oxidative stress in the body. Phenolic compounds, such as flavonoids and phenolic acids, are abundantly found in fruits, vegetables, whole grains and herbs. They offer protection against cardiovascular diseases, cancer and other conditions related to aging. Antioxidant compounds are of great research interest due to their potential use as natural preservatives in foodstuffs, replacing synthetic antioxidants. In addition, these compound play a crucial role in the treatment of various diseases. In this study, we are interested in the analysis of phenolic compounds and the antioxidant activity of the crude extract of the aerial part of two aromatic and medicinal plants: Thymus ciliatus ssp coloratus and ssp euciliatus. These plants are part of the Lamiaceae family and are present spontaneously and widely in Algeria. They are still widely used in traditional medicine in many countries, especially as antiseptics and to treat respiratory problems. The extractions of the crude extracts of the aerial part of Thymus ciliatus from the two ssps were carried out by extraction methods using specific solvents for each extract. The evaluation of the antioxidant power by four different techniques, namely the reduction of iron FRAP, the trapping of the free radical DPPH, the trapping of hydrogen peroxide (H₂O₂) and the method of decolorization of beta-carotene in all extracts and fractions, shows that there is a certain conformity between the four techniques studied. Indeed, the crude extract of the aerial part of Thymus ciliatus ssp euciliatus exhibits a more pronounced antioxidant activity than ssp coloratus, by studies between the four methods which demonstrate the superiority of subspecies ssp euciliatus. Key words: Thymus ciliatus ssp color
Activité anti-oxydante et anti-microbienne de l’huile essentielle d’une plante médicinale Ammoides verticillata de la région d’Ain temouchent
(2023) KADA MOSTEFA, Mohamed Amine; RAHMANI, Khaled
The work of this Master aimed to study the antibacterial and antioxidant activity of the essential oil of an aromatic medicinal plant: Ammoides verticillata, the extraction of essential oils was carried out by hydrodistillation. The antioxidant activity of the oil studied showed very promising antioxidant effect by DPPH methods. A. verticillata EO showed a very high antioxidant capacity with IC50s of 0.125 mg/ml. The antioxidant capacity of A. verticillata EO was higher than that of the ascorbic acid and BHT controls. The antimicrobial activity of essential oils was studied against nine bacterial strains: three Gram-negative Escherichia coli (ATCC 25922), Pseudomonas aeruginosa (ATCC 27853) and Salmonella typhi (ATCC 14028), six Gram-positive : Staphylococcus aureus (ATCC 43300), Clostridium sporogenes (ATCC 19404), Bacillus subtilis (ATCC 6633), Enterococcus faecalis (ATCC 7314), Lactobacillus rhamnosus (ATCC 53103) and Bacillus cereus (ATCC14579).Ammoides verticilata EO showed very good inhibitory activity against all the strains tested, with activity ranging from sensitive to extremely sensitive. We also note that this oil was extremely sensitive against both Gram(+) and Gram(-) bacteria.
Contribution à l’étude de la dynamique de la végétation Du Littoral Algérien (NORD.OUEST Algérien)
(2021) Nasri, sofiane; Sameur, Abdellah; Amara, Mohamed
L’objectif de notre travail est la contribution à l’étude de « la dynamique de la végétation du littoral algérien ». Pour réaliser ce travail, deux stations ont été choisis dans le littoral est qui sont Ghazaouet et Beni-saf. Sur le plan bioclimatique, les deux stations d’étude ont d’hiver chaud favorisant ainsi l’installation des espèces végétales. La méthode d’étude a été basée sur la comparaison entre deux stations à partir des données climatique, géographique et les études floristiques. Ensuite, nous avons mis en exergue les principales dynamiques des communautés végétales de ghazaouet et beni saf, après perturbation (déchets ménagers ou surpâturage). Des relevés floristiques ont été réalisés dans des zones affectées par la pollution. D’autres relevés ont été réalisés dans des peuplements affectés par le surpâturage.
Inventaire des algues sur le littoral de Béni-Saf (Wilaya d'Ain Témouchent)
(2023) GUEDDOUM, FATMA; DERRAG, Zaineb
This study aims to establish and enrich an inventory of algae on the coasts of Aïn Témouchent. For this, we chose the coast of Béni Saf. It is characterized by the presence of various algae. We visited three sites, the port of Beni Saf, site next to the port (pollute) and the beach of the well, And we extracted various algae in May, and a list of 14 species belonging to Rhodophycophytes, Pheophycophytes and Chlorophycophytes has been established. Each type of algae is of great importance in biodiversity. We have listed 5 species of Rhodophyceae, 4 species of Pheophyceae and 5 species of Chlorophytes
exploration ethnobotanique des plantes medicinales employées par les herboristes d'ain temouchent pour traitement des affectations gasto-intestinales
(2024) Yahi, Amina; CHIHAB, Mounir
Phototherapy is an ancestral practice often adopted by patients suffering from chronic or serious pathologies, such as gastric conditions which are very widespread and which affect the world population as well as Algeria. The use of herbal medicine is common in Africa, particularly in Algeria. With the aim of studying the nature and frequency of use of medicinal plants used by patients with gastrointestinal disorders, to identify the herbs used, and finally to identify their beneficial effects; an ethnobotanical study was carried out with 37 herbalists in the Ain Temouchent region (Ain Temouchent, Beni Saf, Hamam Bouhdjar).To this end, a questionnaire was conducted among these herbalists for a period of 05 months (February Ŕ June 2024). The information collected was processed and analyzed by software Excel 2007. The results obtained show that: 97.29% of herbalists are men, 65% are sellers of aromas and spices, 35% are herbalists, the age of 64.8% of herbalists is between 40- 50 years old, 75.6% are married, 37.8% have primary and secondary education, 16.20% have university education. In our study, 68 species were identified and divided into 32 botanical families with a predominance of the Lamiaceae family (11 species) 16.17%, the Apiaceae (08 species) 11.76% and Rosaceae 08, 82%. The most cited plants being: Myrtus Communis 91.89%, Foeniculum Vulgare 89.18%; Pimpinella Anisum 81.08%; Punica Granatum 72.97%; Cuminum Cyminum 67.56%; Matricaria Chamomilla 54.05%; Carum Caraway 51.35%. The most used parts were the seeds 97.29% and the leaves 89.18%, the most used methods of preparation were infusion 83.78% and decoction 56.75%. The use of medicinal plants was characterized by the use of a mixture of herbs and the most frequent combination was Fennel + Anise in 11.78% of cases and Fennel + Anise + Myrtle 09.80%. In light of this work; the effectiveness of medicinal plants is recognized in relieving the symptoms of gastrointestinal disorders; but their conventional use will have to go through multiple research in order to clarify their effectiveness and safety.
Gestion des eaux pluviales et développement durable cas de la région d’Ain Temouchent
(2024) BOUDIAF, Soria; BOUGHALEM, Mostafia
Ce mémoire examine la gestion efficace des eaux pluviales dans le contexte du développement durable, en se concentrant sur les pratiques et les politiques appliquées dans la région d'Ain Témouchent en Algérie. Il analyse les défis posés aux ressources en eau de la région en raison de l'urbanisation rapide et des changements climatiques. Les différentes stratégies de gestion des eaux pluviales, telles que les techniques de drainage durable et l'utilisation de systèmes naturels de rétention des eaux, sont présentées. Le mémoire offre également une analyse des politiques locales en vigueur, ainsi que des études de cas illustrant des solutions durables réussies.
L’exploitation minière en Afrique : Enjeux et impacts sur la société et l’environnement. Exemple de l’Algérie et du Mali
(2024) BATHILY, Mohamed Papa; SOUIDI, Zahira
This study examines the issues and impacts of mining in general, with emphasis on the cases of Algeria and Mali. It assesses how mining activities affect the environment, economy and society. The main environmental impacts observed are air and water pollution, land degradation and the destruction of ecosystems. On a socio-economic level, mining has repercussions on communities, particularly in terms of displacement, employment and living conditions. This study also highlights the importance of responsible mining that integrates sustainable practices to minimize environmental damage in a way that harmonizes benefits with economic and social issues. It offers recommendations to improve mining sector governance, strengthen environmental legislation and promote community participation in the two countries studied.
Analyse ethnobotanique des plantes médicinales à propriétés antidiabétiques chez la population D’Ain-Temouchent dans le nord-ouest algérien
(2024) BENZEMRA, Narimane; CHIHAB, Mounir
Le diabète représente un problème majeur de santé publique en raison de ses graves conséquences et de son caractère évolutif. Pour prévenir et atténuer cette maladie, des remèdes à base de plantes médicinales sont couramment utilisés. Une enquête ethnobotanique a été menée à Ain T’émouchent afin de mettre en lumière la conservation du savoir ancestral sur les plantes antidiabétiques, l’étude a porté sur 100 sujets diabétiques de différents âges et sexes, les résultats montrent que les femmes utilisent les plantes plus que les hommes (70%). Dans cette étude, 29 plantes ont été identifiées comme étant utilisées pour traiter le diabète, parmi lesquelles le fenugrec, olivier, la cannelle et le cumin sont les plus mentionnées. Les résultats ont répertorié 19 familles de plantes médicinales, avec une prédominance des lamiacées (31,03%). Les feuilles représentent la partie la plus utilisée (41%), et la majorité des remèdes sont préparés sous forme de décoctions et d’infusions, administrés principalement par voie orale. Aucun effet indésirable lié à l’utilisation de ces plantes médicinales n’a été observé dans le cadre de cette étude.
Restauration des écosystèmes forestiers après incendies Etude comparative entre deux peuplements, les feuillus et les résineux, au Nord-Ouest Algérien
(2023) ADJAOUD, Saadi
This study focuses on comparing various techniques for restoring forest ecosystems post-fire, with a focus on comparing broadleaf and coniferous tree populations. The study found that the most effective methods for long-term and sustainable regeneration include natural regeneration and protective measures. For broadleaf populations, natural regeneration is the better option, while for coniferous populations, reforestation is necessary to regain initial population structures, although it requires in-depth expertise for each species. It is also important to limit environmental aggressions like fires and overexploitation in order to protect these ecosystems. Ultimately, the study highlights the significance of understanding the evolutionary and functional aspects of each plant species to pick the best restoration methods that are both effective and sustainable.

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