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Fahima Neffar

  • Biodiversity Journal, 13 (1): 0115-0121

    Ghanem Nadra, Neffar Fahima & Nouri Lilia
    Study of relation between invertebrates community under Allium sativum L. crop in the semi-arid region in Algeria
    https://doi.org/10.31396/Biodiv.Jour.2022.13.1.115.121

    ABSTRACT
    A large number of organisms live in soil and perform various ecological functions there. This soil biodiversity of fauna community is particularly studied in the case of agrosystems because it has an impact on primary production. The garlic (Allium sativum L.) cultivation is one of gardening crops widely used above all in semi-arid regions in Algeria especially lately, given its economic and social interest. This vegetable constitutes the most important nutrient of a balanced diet due to their valuable nutritional component values and micronutrients essential for human health. The organic matter that is deposited in soil via aerial or root litter specific to garlic culture therefore constitutes particular energy and carbon sources for soil biodiversity, especially in rather distinct climatic conditions. The objective of this research was therefore to study the biodiversity relationship between edaphic invertebrates community under a garlic crop. Random soil sampling at six sites was carried out in the spring period in a plot at Chemora commune in Batna region, characterized by a semi-arid climate with cold winter. It was followed by an extraction and identification of invertebrates carried out with the naked eye, and by means of a Berlese trap with a soil volume of 30 cm3 of about 8 at 10 kg of soil. The results allowed to identify eight varieties of invertebrates: Lombricidae of the genus Aporrectodea, Allolobophora and Proctodrilus, Coleoptera larvae, Tipulidae larvae; Dermaptera, Diptera larvae, Coleoptera larvae, mites and Carabidae. The correlation matrix revealed a negative correlation between the biomass of earthworms as well as their number and Tipulidae larvae Dermaptera and Carabidae. The principal component analysis gathers the variables in a first group of total earthworms, earthworm biomass and number of Aporrectodea and in the second group of Tipulidae larvae and Carabidae.

  • Biodiversity Journal, 10 (4): 569-576

    Fahima Neffar, Leila Rouahna, Tayeb Kerris & Fouad Meradsi
    Characterization of gypsy moth Lymantria dispar (Linnaeus, 1758) (Lepidoptera Lymantriidae) eggs in Cork oak forests of the Kabylie region (Jijel-Algeria)
    https://doi.org/10.31396/Biodiv.Jour.2019.10.4.569.576

    ABSTRACT
    Algerian oak forests, extending over the entire northern littoral region, are attacked episodically by many defoliating Lepidoptera, of which Lymantria dispar (Linnaeus, 1758) (Lepidoptera Limantriidae) is the most widespread. In our study we aim to highlight the action of the changes of trophic factors on the dynamics of the population of Lymantria dispar through field inventory methods. Namely: the eggs counting by the line-transect method, picking of the eggs, control of eggs quality. Carried out on two stations in the Kabylie region (Jijel), in the forest of Béni Ider El M’sid (Taher) and that of the Ouled Djendjen Canton Boudouda (Texanna). The obtained results show that Texanna station is distinguished by a very high non-viable egg rate compared to Taher station, this is caused by the difference between the phenology of Lymantria dispar and the host tree which is affected in its foliage by various factors whose altitude is one of these factors.