Search

We conducted an avian count from November 2017 to October 2019. This qualitative and quantitative study at the level of an artificial environment, in the case of the palm grove d’El Hadjed in El Ménea, provides an objective inventory of the birds' diversity. A total of 48 species have been identified by researchers, distributed among nine orders and 19 families. The order Passeriformes is the most dominant, with 11 families and 36 species, or 75% of the recorded species. As for Muscicapidae, the Sylviidae are the best represented, with 11 and 5 species, respectively. Depending on phenological status, there are17 species of passage visitors (35.42%), 18 breeding species, of which 13 are residents (27.1%), and 5 are migratory species (10.42%). 12 species (25%) represent the winter visitor birds. At the national level, executive Fiat Algerian law (N°12-235) protects 8 species, or 16.67%, while Ordinance (06-05) protects one other species (Peregrine Falcon). Two species have an international status of "near threatened" (Lanius senator), while one species is classified as "vulnerable" (Streptopelia turtur). Shannon index values fluctuate between 2.91 bits (2018) and 2.99 bits (2019), and evenness index (E) values fluctuate between 0.56 bits (2018) and 0.62 bits (2019). [ABSTRACT FROM AUTHOR]

An avifaunestic count was carried out between November 2017 and October 2020. This qualitative and quantitative study at the level of an artificial environment, in the case of the green band Noumérate in Ghardaïa Nord, for an objective inventory of the birds' diversity. Indeed, 86 species have been identified, belonging to 17 orders and 33 families. The order Passeriformes is the most dominant with 15 families and 56 species, or 44.12% of the recorded species. As for Muscicapidae, the Alaudidae, are the best represented with respectively 13 and 07 species. Depending on phenological Status, 43 species Passage Visitor (50%), 25 breeding species, of which 18 are Resident (20.93%) and 7 are migratory species (8.14%). The Winter Visitor birds are represented by 17 species (19.77%) and finally, only one species of bird bears the unknown phenological status. It should be noted that at the national level, 22 species have been identified, or 25.58% are protected by executive Fiat Algerian law (N°12-235). On the other hand, internationally, two species have been found to have "Near threatened" status (Meadow Pipit and Dartford Warbler) and only one species has "Vulnerable" status (European Turtle Dove). The hybrid Sparrow is the most dominant among all the species counted, with 30.9% in 2018 and 29.9% in 2019. Shannon index values fluctuate between 3.65 bits (2018) and 3.32 bits (2019) and evenness index (E) values are relatively constant between 2018 and 2019, equal to 0.65. [ABSTRACT FROM AUTHOR]

Abstract: Through monthly samplings of grasshoppers taken from five sites in oases and two in steppes in the area of Biskra, 45 species could be recorded. Four assemblages of species can be defined, two in the oasian zones, one in the stony steppe and a last one in the sandy steppe. The two oasian assemblages are interpreted in the light of a gradient of salinity and humidity determined by the vegetation. In each type of steppe, there is a spring sub-assemblage and a summer-autumnal one, but such a distinction is not possible in the anthropised sites. The steppe stations are moreover characterized by a larger diversity determined by the Shannon index and a weaker density than in the oases, in spite of a comparable richness. The comparative analysis of species phenology between the different assemblages allows discussing their adaptation toward seasonal variations of dryness in these arid environments. [Copyright &y& Elsevier]