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The Algerian coastline, known for its diverse array of fauna primarily dependent on marine ecosystems, has recently experienced notable changes in its community, perhaps due to the severe weather conditions in the North Atlantic. To explore this phenomenon, we conducted an extensive survey of the entire Algerian coast, specifically focusing on fishing ports and beaches, during November and December of 2022. Our objective was to investigate the remarkable and recent irruption of the razorbill Alca torda, which typically spends the winter in the open sea. Throughout our study, we documented a total of 32 sightings of razorbill individuals, including both live specimens observed within harbors (as depicted in Fig. 2 & 3) and deceased individuals washed up on the beaches.

Birds constitute a zoological group which is considered to be a good indicator of balance and biological diversity. The aim of this study was to investigate the birds of the region on Tamanresset which is situated in the south of Algeria and has an area of 554.000 km2. Direct observations with camera and a pair of binoculars, supported by ornithological surveys carried out by progressive frequently sampling, in each stations of study area, 44 bird species were observed in this region which fall into 12 orders and 24 families. Among these species, 3 new observations recorded for the 1st time belonging to White-rumped Seedeater (Crithagra leucopygia) and blue-napped mousebird (Urocolius macrourus) along with 2 other species, the rose-ringed parakeet (Psittacula krameri) and the African silver bill (Euodice cantans), are listed as an expansion in this region.

Orchids of Souk-Ahras province (Northeast of Algeria) : inventory, ecology, distribution and conservation concerns. Algerian orchids became better known during the last years, but certain regions, such as the province of Souk-Ahras (Northeast of Algeria), remain under-prospected. This study is a phytoecological approach, which aims to improve the knowledge of the orchids of this province. A series of targeted surveys has been realized between 2011 and 2015 when we were able to check 7 genera, including 27 species/ subspecies and 1 hybrid. Some species are widely distributed throughout the province territory, while others are very localized. Only 18 municipalities among the 26 in the province are concerned by this distribution and are represented by 73 stations including at least one species of orchids. Among the observed taxa 7 are qualified as rare or very rare at national level, at least 3 are Algerian-Tunisian endemics (Ophrys battandieri, Ophrys numida, Orchis pauciflora subsp. laeta) and at least 3 are threatened at global scale (Ophrys atlantica, VU ; Orchis patens subsp. patens, EN ; Serapias lingua subsp. stenopetala, CR). The orchids of Souk-Ahras province often grow on limestone, clayey or siliceous soils, in a subhumid bioclimate rarely semi-arid, at all altitudes of the province, from 500 to 1400 m. This variety of species highlights the taxonomic richness and confirms the interest of prospecting this region that was neglected by orchidologists., La connaissance des orchidées de l’Algérie a sérieusement progressé ces dernières années, mais certaines régions, comme celle de la wilaya de Souk-Ahras (nord-est de l’Algérie), demeurent sous-prospectées. Cette étude est une approche phytoécologique qui a pour objectif d’améliorer la connaissance des orchidées de cette wilaya. Une série de prospections réalisée par les auteurs entre 2011 et 2015, s’est soldée par l’inventaire de 7 genres, comprenant 27 espèces/sous-espèces et 1 hybride. Certaines espèces présentent une large distribution à travers le territoire de la wilaya, alors que d’autres sont très localisées. Seules 18 communes sur les 26 de la wilaya sont concernées par cette distribution et représentées par 73 stations incluant au moins une espèce d’orchidées. Parmi les taxons observés, sept sont qualifiés de rares ou très rares à l’échelle du pays, au moins trois sont des endémiques algéro-tunisiens (Ophrys battandieri, Ophrys numida, Orchis pauciflora subsp. laeta) et au moins trois sont menacés à l’échelle globale (Ophrys atlantica, VU ; Orchis patens subsp. patens, EN ; Serapias lingua subsp. stenopetala, CR). Les orchidacées de la wilaya de Souk-Ahras croissent souvent sur des sols calcaires, argileux ou siliceux, dans un bioclimat subhumide ou rarement semi-aride, à toutes les altitudes de la wilaya (500 à 1400 m). Cette variété d’espèces met en évidence la richesse taxinomique et confirme l’intérêt de prospecter cette région négligée par les orchidologues., Boukehili Khouloud,Boutabia Lamia,Telailia Salah,Menaa Mohcen,Tlidjane Assma,Cherif Maazi Mohamed,Chefrour Azzedine,Saheb Menouar,Véla Errol. Les orchidées de la wilaya de Souk-Ahras (Nord-est algérien) : inventaire, écologie, répartition et enjeux de conservation. In: Revue d'Écologie (La Terre et La Vie), tome 73, n°2, 2018. pp. 167-179.

International audience; A series of phylogeographic studies in the Maghreb identified a repeated pattern of deep genetic divergence between an eastern (Tunisia) and western (Morocco) lineage for several taxa but lack of sampling in Algeria made it difficult to know if the range limits between the eastern and western lineages were shared among taxa or not. To address this question, we designed a comparative phylogeographic study using 8 reptile and 3 amphibian species with wide distribution in the Maghreb as models. We selected species where previous studies had identified an East-West phylogeographic divide and collected sampled in Algeria to 1) examine whether the simple East-West divergence pattern still holds after filling the sampling gap in Algeria or if more complex diversity patterns emerge; 2) if the E-W pattern still holds, test whether the limits between the E and W clades are shared between species, suggesting that common historical process caused the E-W divergences; 3) if E-W limits are shared between species, use information on the age of the divergence to identify possible geological or climatic events that could have triggered these E-W differentiations. We found that the E-W pattern was generally maintained after additional sampling in Algeria and identified two common disjunction areas, one around the Algeria-Morocco border, the other one in Kabylia (central Algeria), suggesting that common historical mechanisms caused the E-W divergences in the Maghreb. Our estimates for the times to most common recent ancestors to the E and W clades span a wide range between the Messinian salinity crisis and the Plio-Pleistocene limit (except for one older split), suggesting different origins for the initial divergences and subsequent preservation of the E and W lineages in common climatic refugia in the west and the east of the Maghreb.

International audience; Arrival of Senecio angulatus (Asteraceae) in Algeria. — In this contribution, the authors report for the first time the presence of Senecio angulatus L. (Asteraceae) in Algeria. Field observations have shown the presence of this taxon in five localities in the center of the country. The identification was checked with particular regard to closely related taxa (e.g. Senecio mikanioides Harv.).This report indicates a recent arrival of this taxon in Algeria. The ecological and economic consequences of this finding are mentioned while a careful oversight of the spread of this invasive plant in the country is needed

Le romarin (Rosmarinus officinalis)est une espèce très abondante dans la région de Hammamet de la wilaya de Tébessa à l\'Est algérien, il est utilisé en médecine populaire, cosmétique et phytopharmacie.L’extraction des huiles essentielles du romarin a été effectuée par entraînement à la vapeur d’eau. L’étude chimique de ces huiles essentielles par CPG-SM a révélé la richesse de ces dernières en 1,8 cinéole par rapport aux autres composés.L’activité des huiles essentielles de Rosmarinus officinalis sur trois souches bactériennes pathogènes (Staphylococcus aureus, Escherichia coli, Acinetobacter sp.) par la technique d’aromatogramme montre que le pouvoir antimicrobien de ces huiles est très important et se caractérise par une action bactéricide contre les germes suscités., Rosemary (Rosmarinus officinalis) is a very abundant species in the area of Hammamet at wilaya of Tébessa at eastern Algeria; it is used in folk medicine, cosmetics and phytopharmacy.The extraction of the essential oil from rosemary was carried out by stripping with steam. Chemical study of these essential oils by GC-MS revealed the richness of the past in 1,8 cinéole compared to other compounds.The activity of the essential oil of Rosmarinus officinalis on three pathogenic bacterial strains (Staphylococcus aureus, Escherichia coli, Acinetobacter sp.) by the technique of aromatogramme shows that the antimicrobial potency of this oil is very important and is characterized by bactericidal raised against germs.