Browsing by Author "TOUARFIA, M"

Filter results by typing the first few letters
Now showing 1 - 3 of 3
  • Thumbnail Image
    Item
    Influence of edaphic factors on the structure and distribution of plant species in and around Mekeiman Marsh Wetland, Northeast of Algeria
    (2021-05-18) TOUARFIA, M; BOUALI, N; DJOUAMAA, A; MAAZI, M.c; HOUHAMDI, M.
    Understanding the environmental factors that influence plant species composition and distribution is essential for successful management of biodiversity. Hence, the purpose of the present study was to assess plant species composition and distribution in a freshwater wetland Mekeiman Marsh, Northeastern Algeria and to analyze the influence of environmental factors on local plant species. To explore the distribution of plant species in this Marsh and analyze their associations with edaphic soil factors, the mapping and types of plant species in this area were analyzed by MapInfo and principal component analysis (PCA) ordination. For this purpose, four stations were chosen according to a stratified sampling method and phytosociological surveys were carried out in 12 plots, which were sampled using the Braun- Blanquet method. Multivariate analyses were used to determine the relationship between plant species distribution and edaphic factors. The R i386 (version 4.0.3) software was used for data analysis. We have identified 48 plant species belonging to 21 families. Results of biological types in the study area revealed the dominance of hemicryptophytes and therophytes, which indicates the presence of therophytization in this Marsh. Spatial distribution maps showed that plant species were divided into two categories viz. sparse and scattered plants according to the humidity gradient. The most important edaphic factors associated with plant species in Mekeiman Marsh were Sodium, Phosphorus, active limestone, Magnesium, clay, organic matter, C/N and Azot. By combining mapping and influence of edaphic factors on the structure and distribution of plant species in this wetland, it was known that the plant assemblages of this Marsh make disproportionately important contributions to wetland-level diversity
  • Thumbnail Image
    Item
    Premières données sur la phénologie du Pigeon ramier Columba palumbus dans la région de Souk Ahras, Nord-Est de l’Algérie
    (2022-07-17) GUELLATI, K; MENAA, M; KAOUACHI, A; TOUARFIA, M; REBBAH, A. C; DJOUAMAA, A; MAAZI, M.C.
    This work was carried out between 2015 to 2020 and aimed to understand the ecology of the Common Wood Pigeon Columba palumbus and to integrate our results in the process of species management and conservation strategies within the forest areas of the Souk Ahras region. During our study, a significant density of the Common Wood Pigeon was observed in the different forest landscapes of our study area. The most important abundance was recorded in 2018 in the forest of Ouled Bechih with a maximum density of 5 500 individuals. We noted also an important density of this species in the forest of Djebel Zaarouria with a maximum density of 1 800 individuals. The study of the reproductive status of the Common Wood Pigeon using the point count IPA method revealed that the Boussessou forest and the Zaarouria forest revealed the most important reproductive indices. The forest of Boussessou has the higher mean of IPA with 4.14 pairs and the forest of Zaarouria has an average of 3.88 pairs.
  • Thumbnail Image
    Item
    Quality Characteristics of Some Algerian Olive Oils with Antioxidant Activity
    (0202-04-01) Boudjema, S; LACHRAF, A; Fella, L; TOUARFIA, M; HABERRA, S
    Herein, the physicochemical properties of ten samples of olive oil from various Algerian regions (the acidity, peroxide, and saponi¦cation index, the speci¦c extinction coe¨cient (K232, K270), the content of chlorophyll, carotenoids, and total polyphenols), in addition to their antioxidant activity were investigated and were compared with three other control samples. The physicochemical characteristics of the tested olive oils proved oil quality varying from virgin to extra virgin olive oil of excellent nutritious and healthy quality for the consumer according to the commercial standards recommended by the International Olive Council (IOC). Moreover, the olive oil collected samples showed that the antioxidant activity of oil samples from south Algeria (Sahara) is higher than that of Northern Algeria, and the oils of Chemlal variety exhibited higher antioxidant activity than that of Segoise variety.