Maghreb Research Articles

First Ex Situ In Vitro Propagation Protocol of Coronilla viminalis Salisb., An Endangered Fodder Species Adapted to Drought and Salinity

Coronilla viminalis Salisb. is a fodder leguminous plant from the Canary Islands and Northwestern Africa with adaptation to drought. Its conservation status is critical. Its low germination capacity and intense loss of viability of the seeds over time complicate its conservation, limiting its long-term maintenance in germplasm banks and hampering its potential use as a resilient fodder crop. Therefore, in this work, two alternative propagation methods have been addressed. The first was based on facilitating seed germination under aseptic conditions, supplementing the media with gibberellic acid (GA3). The latter consisted of creating a micropropagation method from nodal segments and testing different media and pretreatments with indole-3-acetic acid (IAA). The quantity and quality of the roots were assessed, and the plant acclimation rate was measured. The results showed that the optimum concentration of GA3 for germination, up to 98%, was 250 PPM. The experiments showed that using IAA in the micropropagation media is critical for in vitro rooting in this species. A hormonal pretreatment with IAA significantly improved the rooting efficiency compared to supplementing it into the culture media. One hundred percent of acclimated plants survived the process. These new protocols will help conserve the species and explore its possibilities as fodder crops.

Advances in Quercus ilex L. breeding: the CRISPR/Cas9 technology via ribonucleoproteins.

The CRISPR/Cas9 ribonucleoprotein (RNP)-mediated technology represents a fascinating tool for modifying gene expression or mutagenesis as this system allows for obtaining transgene-free plants, avoiding exogenous DNA integration. Holm oak (Quercus ilex) has an important social, economic, and ecological role in the Mediterranean climate zones of Western Europe and North Africa and is severely affected by oak decline syndrome. Here we report the first example of the application of the CRISPR/Cas9-RNP technology in holm oak. Firstly, we evaluated the protoplast isolation from both in vitro leaves and proembryogenic masses. Proembryogenic masses represented the best material to get high protoplast yield (11 x 106 protoplasts/ml) and viability. Secondly, the protoplast transfection ability was evaluated through a vector expressing green fluorescence protein as marker gene of transfection, reaching a transfection percentage of 62% after 24 hours. CRISPR/Cas9 RNPs were successfully delivered into protoplasts resulting in 5.6% ± 0.5% editing efficiency at phytoene desaturase (pds) target genomic region. Protoplasts were then cultured in semisolid media and, after 45 days in culture, developed embryogenic calli were observed in a Murashige and Skoog media with half concentration of NH4NO3 and KNO3 supplemented with 0.1 mg/L benzylaminopurine and 0.1 mg/L 2,4-dichlorophenoxyacetic acid.

Petrogenesis of a new type of intrusive shergottite: olivine-gabbro Northwest Africa 13227

Petrologic investigations of martian meteorite Northwest Africa (NWA) 13227 indicate it is an olivine-gabbroic shergottite, a relatively new shergottite group, which differs from previously described gabbroic shergottites due to relatively high quantities of olivine. NWA 13227 is comprised of phenocrystic, oscillatory-zoned pyroxene and olivine, set in a matrix of maskelynite, Fe-Cr-Ti oxides, phosphates, and sulfides. It displays gabbroic and poikilitic textures in 2D from back-scattered electron images, and in 3D from X-ray Computed Tomography (XCT) imaging, suggesting affinities to both poikilitic and gabbroic shergottites. Measured εHf and εNd values of bulk rock (-19.7 and −5.9, respectively) and its chondrite-normalized La/Yb ratio of 1.13 indicate the specimen is derived from a mantle reservoir relatively enriched in incompatible trace elements and is similar to that which produced most ‘enriched shergottites.’ Based on the Ti/Al ratio of pyroxene, phosphorous zoning in olivine, and minor components in phosphates and oxides, we infer that NWA 13227 began crystallizing under reducing conditions of QFM–2.6 and temperatures of ∼ 1100 °C, consistent with conditions in Mars’ lower crust/upper mantle. The sample finished crystallizing at or near the surface under redox conditions between QFM–0.5 to QFM–0.1 and temperatures of ∼ 850 °C. The volatile element compositions in apatite indicate that NWA 13227 experienced degassing during the last stages of crystallization. The timing of crystallization is estimated at 225 Ma ± 50 Ma using a Lu-Hf and Sm-Nd source versus age model.

Arthrocnemum Moq.: Unlocking Opportunities for Biosaline Agriculture and Improved Human Nutrition.

(1) Background: This study provides novel insights into the elemental content and biomineralization processes of two halophytic species of the genus Arthrocnemum Moq. (A. macrostachyum and A. meridionale). (2) Methods: Elemental content was analyzed using ICP-MS, while biominerals were detected through electron microscopy (SEM and TEM) and X-ray diffraction. (3) Results: The elemental content showed significant concentrations of macronutrients (sodium, potassium, magnesium, and calcium) and micronutrients, especially iron. Iron was consistently found as ferritin in A. macrostachyum chloroplasts. Notably, A. macrostachyum populations from the Center of the Iberian Peninsula exhibited exceptionally high magnesium content, with values that exceeded 40,000 mg/kg d.w. Succulent stems showed elemental content consistent with the minerals identified through X-ray diffraction analysis (halite, sylvite, natroxalate, and glushinskite). Seed analysis revealed elevated levels of macro- and micronutrients and the absence of heavy metals. Additionally, the presence of reduced sodium chloride crystals in the seed edges suggested a mechanism to mitigate potential sodium toxicity. (4) Conclusions: These findings highlight the potential of Arthrocnemum species as emerging edible halophytes with nutritional properties, particularly in Western European Mediterranean territories and North Africa. They offer promising prospects for biosaline agriculture and biotechnology applications.

Revisiting the Formation and Radicalisation of Boko Haram and Al-Qaeda in the Lands of the Islamic Maghreb (AQIM) through Social Movement Theory

This paper uses social movement theory to examine the rise and development of Boko Haram and AQIM into radical groups. Boko Haram and AQIM were initially established as moderate and conservative Islamist groups in Nigeria and Algeria respectively. AQIM was originally a political party – the FIS but changed names to the GIA, the GSPC, and AQIM each with a different modus operandi. Boko Haram was a local organization that has been espousing an anti-system frame alongside violent tactics since 2009. Relying on secondary data, this paper found that the emergence and eventual transformation of Boko Haram and AQIM into radical movements signify the existence of social movement factors of political opportunity structures, mobilizing structures, and framing processes in Nigeria and Algeria. Results from content analysis of the data show that while the two movements emerged in two distinct socio-economic and political environments, they were rational actors who continued to utilize the available political structures opportunity, mobilizing structures and framing processes to mobilize and sustain collective actions. It is evident that government repression only made the two groups change tactics and strategies when what they regarded as free spaces diminished at times they gathered material and non-material resources. That coincided with the radical views of some of the groups’ members, the presence of mobilizing structures, and a frame resonance that ensured recruitment into the two movements.

Disparate Pb-isotopic ages of silicate and phosphate minerals in the diabasic angrite Northwest Africa 12320

Pb-isotopic dating of the recently discovered diabasic angrite Northwest Africa (NWA) 12320 yielded ages of 4564.17 ± 0.50 Ma and 4562.82 ± 0.37 Ma for acid-insoluble and soluble minerals respectively. These ages are calculated using measured 238U/235U ratios of soluble and insoluble minerals, thereby excluding the possibility that the apparent age difference is caused by internal U-isotopic variations. The age of the insoluble minerals is indistinguishable from published Pb isotopic ages of other medium-grained angrites SAH 99555 and D'Orbigny. The age of acid-soluble minerals is distinctly younger, with a 1.35 ± 0.62 Ma age gap between the PbPb ages of the two mineral fractions. The mineral hosts of U, Th and radiogenic Pb in the meteorite were identified through in-situ SIMS measurements of these elements in all minerals. The principal carriers of U, Th and radiogenic Pb are acid insoluble Al-Ti-rich augite and soluble Si-rich phosphate. Closure temperatures for diffusion of radiogenic Pb in these minerals are calculated to be respectively 820 ± 90 °C and 450 ± 80 °C using the observed range of crystal dimensions and the published experimental data for Pb diffusion in augite and apatite. The age difference between the pyroxene and phosphates has two potential explanations: (1) a late reheating event >450 °C which may have re-set the UPb systematics of the phosphates but not the pyroxenes or (2) slow cooling of the rock from ∼450–820 °C. If slow cooling is the reason for the age difference, we can estimate a model cooling rate of 270 ± 150 °C/Ma over the estimated closure temperature range between pyroxenes and phosphates. This rate is ∼11 orders of magnitude slower than petrologic cooling rates of quenched angrites at temperatures above 1000 °C determined experimentally using the composition of Asuka 881371 groundmass (Keil, 2012), which is similar to NWA 12320 groundmass. If there was no late reheating event, the discrepancy between fast cooling rates at high temperatures near the solidus, followed by much slower cooling at lower temperatures, might have been caused by impact melting. It could also be attributed to the initial eruption of the source magma of NWA 12320 near the surface of the parent body, followed by burial due to subsequent eruptions.

Baseline Climatology of the Canary Current Upwelling System and Evolution of Sea Surface Temperature

Global climate change has induced a rise in sea surface temperature (SST), although this increase is not uniform across the world. Significant variations exist between coastal and offshore waters, particularly in regions affected by upwelling processes. This study focuses on the Canary Current Upwelling System (CCUS), stretching from Northwest Iberia to Northwest Africa. High-resolution remotely sensed SST data (0.05°) from the ODYSSEA Level 4 Sea Surface Temperature Reprocessed dataset were validated with in situ measurements and employed to establish a regional climatological baseline for 1982–2012. Subsequent years were compared to this baseline to construct SST anomaly maps, revealing SST changes since 2012. The study area was further divided into sub-regions for comparative analysis. Results indicate that SST consistently increased at a higher rate offshore compared to the adjacent nearshore regions. A reference dataset spanning 1951–1981 was used to gauge SST variability between the two baselines. SST exhibited a 0.59 °C increase from 1951–1981 to 1982–2012, with a slowing of SST trends beyond the 1982–2012 baseline. This research offers valuable insights into the climatological dynamics of the CCUS. These findings enhance our understanding of this critical coastal system’s climatology, laying the groundwork for future investigations into evolving climate patterns in coastal regions.

Record-shattering 2023 Spring heatwave in western Mediterranean amplified by long-term drought

The western Mediterranean region experienced an exceptional and unprecedented early heatwave in April 2023. By shattering historical temperature records, especially in the Iberian Peninsula and northwestern Africa, this extreme offers a stark illustration of a drought–heatwave compound event. Here, we investigate the soil moisture–temperature interactions that underpinned this event, using the most up-to-date observations and a robust statistical analysis. Our results reveal that soil moisture deficit preconditions, concurring with a strong subtropical ridge as a synoptic driver, had a key contribution to the amplification and duration of this record-breaking heatwave. Specifically, we estimate that the most extreme temperature records would have been 4.53 times less likely and 2.19 °C lower had the soils been wet. These findings indicate that soil moisture content may be a crucial variable for seasonal forecasting of early HW in this region and in other Mediterranean climate regimes that are already suffering an increment in the frequency of compound drought–heatwave events.

Climate Change Facilitates the Potentially Suitable Habitats of the Invasive Crop Insect Ectomyelois ceratoniae (Zeller)

Invasive alien insects directly or indirectly driven by climate change threaten crop production and increase economic costs worldwide. Ectomyelois ceratoniae (Zeller) is a highly reproductive invasive crop insect that can severely damage fruit commodities and cause significant economic losses globally. Estimating the global potentially suitable habitats (PSH) of E. ceratoniae is an important aspect of its invasive risk assessment and early warning. Here, we constructed an optimized MaxEnt model based on the global distribution records of E. ceratoniae, and nine environmental variables (EVs), to predict its global PSH under current and future climates. Our results showed that the RM value was 2.0 and the mean area under receiver operating characteristic curve (AUC) value was 0.972, indicating the high accuracy of the optimal MaxEnt model. The mean temperature of driest quarter (bio9, 50.2%), mean temperature of wettest quarter (bio8, 16.9%), temperature seasonality (bio4, 9.7%), and precipitation of coldest quarter (bio19, 9.1%) were the significant EVs affecting its distribution patterns. The global PSH of E. ceratoniae are mainly located in western Asia under current climate scenarios (687.57 × 104 km2), which showed an increasing trend under future climate scenarios. The PSH of E. ceratoniae achieved the maximum under the shared socioeconomic pathway (SSP) 1–2.6 in the 2030s and under the SSP2-4.5 in the 2050s. The increased PSH of E. ceratoniae are mainly located in southwestern Asia, northwestern Europe, northwestern South America, northwestern North America, southern Oceania, and northwestern Africa. Our findings suggest that quarantine officials and governmental departments in the above high-risk invasion areas should strengthen monitoring and early warning to control E. ceratoniae; in particular, cultural measures should be taken in areas where its further expansion is expected in the future.

Fine-tuning the isotopic niche of a marine mammal community through a multi-element approach and variable spatial scales

It is commonly assumed that the resolution of the isotopic niche of consumers can be improved with a larger number of chemical elements, but this is only true if steep environmental gradients exist at the appropriate spatial scale. Off Mauritania, the δ13C value is a useful proxy to understand the distribution of marine mammals along the inshore-offshore gradient, and the δ15N value to assess their trophic position. Here, the incorporation of δ18O values as an independent habitat tracer largely improved the resolution of the isotopic niche, because the δ18O gradients, mostly reflecting marked salinity gradients, spanned over broad spatial scales when compared to the home range of marine mammals. On the contrary, δ34S values did not improve much the resolution of the isotopic niche at the species level, although it was useful to identify individuals relying on food webs associated with anoxic sediments, such as seagrass meadows. This is because the δ34S gradient in the area develops over a small spatial scale, compared to the home range of the considered species. This study provides new insights into the use of a muti-element approach in isotopic ecology, and improves the understanding of habitat partitioning between the considered marine mammal species off North Western Africa.

The sweet tabaiba or there and back again: phylogeographical history of the Macaronesian Euphorbia balsamifera.

Biogeographical relationships between the Canary Islands and north-west Africa are often explained by oceanic dispersal and geographical proximity. Sister-group relationships between Canarian and eastern African/Arabian taxa, the 'Rand Flora' pattern, are rare among plants and have been attributed to the extinction of north-western African populations. Euphorbia balsamifera is the only representative species of this pattern that is distributed in the Canary Islands and north-west Africa; it is also one of few species present in all seven islands. Previous studies placed African populations of E. balsamifera as sister to the Canarian populations, but this relationship was based on herbarium samples with highly degraded DNA. Here, we test the extinction hypothesis by sampling new continental populations; we also expand the Canarian sampling to examine the dynamics of island colonization and diversification. Using target enrichment with genome skimming, we reconstructed phylogenetic relationships within E. balsamifera and between this species and its disjunct relatives. A single nucleotide polymorphism dataset obtained from the target sequences was used to infer population genetic diversity patterns. We used convolutional neural networks to discriminate among alternative Canary Islands colonization scenarios. The results confirmed the Rand Flora sister-group relationship between western E. balsamifera and Euphorbia adenensis in the Eritreo-Arabian region and recovered an eastern-western geographical structure among E. balsamifera Canarian populations. Convolutional neural networks supported a scenario of east-to-west island colonization, followed by population extinctions in Lanzarote and Fuerteventura and recolonization from Tenerife and Gran Canaria; a signal of admixture between the eastern island and north-west African populations was recovered. Our findings support the Surfing Syngameon Hypothesis for the colonization of the Canary Islands by E. balsamifera, but also a recent back-colonization to the continent. Populations of E. balsamifera from northwest Africa are not the remnants of an ancestral continental stock, but originated from migration events from Lanzarote and Fuerteventura. This is further evidence that oceanic archipelagos are not a sink for biodiversity, but may be a source of new genetic variability.

Pregabalin use in forensic hospitals and prisons in German speaking countries-a survey study of physicians.

Pregabalin is a gamma-aminobutyric acid (GABA) analog that was approved in the EU in 2004 for the treatment of neuropathic pain, generalized anxiety disorder and epilepsy. Since its introduction, pregabalin abuse and misuse has increased significantly. In Switzerland, clinical reports suggest that pregabalin misuse is common among patients in forensic hospitals and prisons. However, data on pregabalin use is scarce, especially in these settings. Therefore, we conducted a study to explore patterns of pregabalin use among prison and forensic patients. We used a questionnaire to survey physicians working in prison and forensic medicine in German-speaking countries. A total of 131 responses were received. According to the physicians' subjective assessment, 82.5% of them had observed a recent increase in pregabalin use by their patients and 89.1% of them reported that their patients requested pregabalin without a clear medical indication. Patients misusing pregabalin in combination with other illicit substances were observed by 93.3% of the physicians surveyed. According to 73.5% of the physicians surveyed, they had already encountered patients on pregabalin doses of more than 600 mg/day (the maximum recommended daily dose); the highest dose reported was 4,200 mg/day. According to 85.0% of physicians surveyed, they have observed patients experiencing withdrawal symptoms from pregabalin, with the most commonly reported symptoms being displeasure and high aggression. Regarding the nationality of pregabalin-misusing patients, 58.3% of the interviewed physicians reported to be rather in contact with foreign patients, mainly from Northwest Africa (Maghreb). Only 45.0% of the surveyed physicians prescribe pregabalin. Among patients who developed behavioral problems while taking pregabalin, none of the physicians (0.0%) showed a tendency to continue pregabalin at the same dose; all respondents chose to reduce/substitute/discontinue. Our study has provided confirmatory evidence that the use of pregabalin presents a significant issue in forensic and prison medicine across German-speaking countries. Prescribing pregabalin in this field can compound use disorder problems and exacerbate challenges in daily life for those in forensic institutions or prisons. It is necessary that all physicians who prescribe pregabalin are clearly informed about the management (including the risks) of this drug.

The other MSA: non-Aterian lithic assemblages in Algeria, characteristics and attribution

ABSTRACT The Middle Stone Age in northwest Africa is mainly described in terms of two technocomplexes, the Aterian and Mousterian, the definitions of which have evolved as research has progressed. While the Aterian is often characterised by tanged tool assemblages, the Mousterian seems to have been defined by default and other denominations such as Levalloisian, Middle Palaeolithic and Sbaikian have also been used for MSA lithic assemblages without pedunculates. Beyond the legitimate question of the relevance of these classifications, one may wonder whether the available quantitative data allow us to identify the variability of lithic assemblages outside the Aterian technocomplex. In the Algerian context, this question is addressed by analysing data recovered by researchers from archaeological sites qualified as non-Aterian. Information and gaps are discussed and compared with what is known about the same period in northwestern Africa, particularly Morocco.

Length–weight relationships for seven fish species caught off Northwest Africa

Abstract Length–weight relationships (LWR) were determined for Deania calceus, Deania profundorum, Merluccius polli, Merluccius senegalensis, Mora moro, Trachyscorpia echinata, and Zenopsis conchifer. Specimens were collected during scientific trawl surveys conducted along the edge of the continental shelf of Morocco and Western Sahara in November–December 2005 and 2006. Fish were measured in relation to total length (TL, to 0.1 cm) and total weight (TW, to 1 g), and sexed when possible. All LWRs obtained for the pooled sexes gave close linear regressions (r2 ≥ 0.93), and LWR parameter b ranged from 2.638 (Z. conchifer) to 3.172 (D. calceus). Data presented herein expand the knowledge base for these species in Northwest Africa, as they have limited or no LWR data publicly available.

О формировании городской популяции вяхиря (Columba palumbus L.) в г. Орле

To date, the Woodpigeon has formed specialized urban populations in many European cities and towns. A steady trend towards synanthropization is also observed for this species in some Russian urban areas. In the city of Oryol, no dedicated studies of the local urban Woodpigeon population have been carried out until recently. This paper aims to evaluate the status of the urban Woodpigeon population in Oryol. The field observations were made in the city of Oryol (52°58′ N, 36°05′ E) located in the Central Federal District of the Russian Federation and having an area of 121.2 km2 , with a population of 303.7 thousand and distance from Moscow of 368 km. The studies began in 2006, at the moment when the urban population of the Woodpigeon started to form within the Oryol administrative borders, and ended in 2021. In June 2019 and July 2021, counts of singing individuals and nest search activities were carried out in forest and recreational parks, squares, cemeteries, on specially selected plots among individual houses, and in green residential areas with predominantly five-storied apartment buildings. In total, 26 census plots with an aggregate area of about 228.9 ha were surveyed. Associated observations were also made, including Woodpigeon nest search in all administrative districts of the city. The degree of introduction of the Woodpigeon into the Oryol urban landscapes was evaluated by the use of five synanthropization stages (from 0 to 4). The paper shows that the urban population of the Woodpigeon in Oryol, as it was the case in other European urban areas, started from the birds which began to nest at the urban periphery, in less transformed habitats, and is dated back to 2006. Afterwards the birds were reported breeding in the built-up part of the city, including the city center, with the first breeding case in the built-up part reported in 2016. The number of nests found in the built-up part of the city grew in the following years. Now the birds nest across the entire city, including its central part, where their nests are found both along highways with intense traffic and in yards in residential areas with predominantly fivestoried apartment buildings. The species is registered as breeding in forest and recreational parks, cemeteries, among individual houses and in green residential areas. The average population density in the said habitats ranges from 0.5 to 1.5 pairs/10 ha, with the average for the entire city being 0.8 pairs/10 ha. The highest population density is registered in cemeteries (1.5 pairs/10 ha) and forest parks (1.1 pairs/10 ha). The population density in green residential areas with predominantly five-storied apartment buildings is 0.9 pairs/10 ha (see Table 1). In general, the Woodpigeon population in Oryol is much smaller than in many other urban areas in Europe and in Northwest Africa (see Table 2), which is attributed to the longer history of urban populations there. All nests found were located on trees and bushes, with none found on man-made structures. The high numbers of the Hooded Crow are among the factors hindering colonization of urban habitats by the Woodpigeon in European cities and towns. At the same time, the Hooded Crow is an uncommon breeder in Oryol. The Magpie, another nest predator, is a rather common breeder in the city: its breeding density was 2.2 nests/10 ha in green residential areas and 1.5 nests/10 ha among individual houses. Urban-breeding Woodpigeon aggregations generally make long-distance foraging movements to nearby farmlands where the birds obtain additional food. The agroclimatic conditions of Orlovsky District, which surrounds the city, are characterized as the most attractive for crop cultivation. Thus, the low numbers of the Hooded Crow and presence of large areas occupied by grain crops around the city make up favorable conditions for the establishment of an urban population of the Woodpigeon in Oryol. The urban Woodpigeon population in Oryol is at the stage 3 – breeding in urban parks in a high density and regular breeding in residential areas (on residential streets). The population under study has not yet reached the synanthropization stage 4, when the species breeds in a high density in urban parks and residential areas, with individual pairs transitioning to breeding on man-made structures.

Partnership Diplomacy: China–Algeria’s Comprehensive Strategic Partnership

ABSTRACT: This study investigates China’s partnership diplomacy with Algeria as an instrument for realizing its BRI. There are several factors (policy coordination, energy cooperation, trade and investments, connectivity, military ties, and people-to-people bonds) behind the establishment of the China–Algeria comprehensive strategic partnership. The main argument is that Beijing’s comprehensive strategic partnership framework with Algeria is based on shared or mutual complementary interests, given the latter’s geographical location, economic potential, and diplomatic weight. The steady growth of China’s engagement and presence in the Maghreb region through the BRI framework aligns with Algeria’s vision and efforts in the Arab Maghreb Union and African integration.

The use of Sambucus ebulus L. in folk medicine and chemical composition

Sambucus species are distributed in regions with temperate and subtropical climates on earth. The high economic value of Sambucus species to humans has increased their economic cultivation in recent years, which has encouraged their rapid spread. Sambucus ebulus L. species is widely distributed especially in Southern and Central Europe, Northwest Africa and Southwest Asia (especially Northern Iran). S. ebulus plant is an important medicinal plant used in folk medicine by the peoples of the Balkan Peninsula, Western Europe and the Middle East. The plant has no special soil requirements. It can be grown in almost any soil type. It has high resistance to prevailing winds. Various parts of the plant have been traditionally used to treat bites, burns, infectious wounds, edema, eczema, urticaria, arthritis and sore throat.

Revisions to the Andrena fauna of north-western Africa with a focus on Morocco (Hymenoptera: Andrenidae)

North-western Africa has a large Andrena fauna, but parts of the country away from coastal areas remain poorly studied, and confusion persists as to the identity of certain taxa due to the long history of study combined with imperfectly examined type material. New fieldwork, genetic barcoding, and study of museum material has substantially improved our understanding of this region. Eleven new species are described: A. (Aciandrena) bendai sp. nov., A. (Aciandrena) ifranensis sp. nov., A. (Euandrena) berberica sp. nov., A. (Hoplandrena) darha sp. nov., A. (Micrandrena) anammas sp. nov., A. (Micrandrena) gemina sp. nov., A. (Micrandrena) tinctoria sp. nov., and A. (incertae sedis) muelleri sp. nov., all from Morocco, and A. (Aciandrena) quieta sp. nov., A. (Euandrena) abscondita sp. nov., and A. (Taeniandrena) prazi sp. nov. from Morocco and Tunisia. Andrena (Aciandrena) nitidilabris Pérez, 1895 was misdiagnosed, and is actually the senior synonym of A. (Graecandrena) montarca parva Warncke, 1974 syn. nov. Andrena (Aciandrena) pisantyi sp. nov. is described from Algeria, Tunisia, and Israel, conforming to A. nitidilabris auctorum sensu Warncke. Andrena (Graecandrena) andina Warncke, 1974 stat. nov. and A. (Micrandrena) heliaca Warncke, 1974 stat. nov. are elevated from sub species to species status. Lectotypes are designated for A. (Melanapis) ephippium Spinola, 1838, A. (Melanapis) rutila Spinola, 1838, A. (Simandrena) rhypara Pérez, 1903, and A. (Suandrena) savignyi Spinola, 1838. Neotypes are designated for A. (Melandrena) soror Dours, 1872 and A. (Notandrena) nigroviridula Dours, 1873. The female of A. (Aciandrena) triangulivalvis Wood, 2020 is described. The following seven additional synonymies are reported (senior name first): A. (Chrysandrena) testaceipes Saunders, 1908 = A. (Chrysandrena) rubricorpora Wood, 2021 syn. nov., A. (incertae sedis) maidaqi Scheuchl & Gusenleitner, 2007 = A. (Carandrena) hoggara Wood, 2021 syn. nov., A. (Lepidandrena) tuberculifera Pérez, 1895 = A. (Poecilandrena) nigriclypeus Wood, 2020 syn. nov., A. (Notandrena) albohirta Saunders, 1908 = A. (Notandrena) eddaensis Gusenleitner, 1998 syn. nov., A. (Notandrena) microthorax Pérez, 1895 = A. (Notandrena) nigrocyanea Saunders, 1908 syn. nov., A. (Simandrena) rhypara = A. (Simandrena) palumba Warncke, 1974 syn. nov., and A. (Taeniandrena) poupillieri Dours, 1872 = A. (Taeniandrena) lecerfi Benoist, 1961 syn. nov. Andrena (Notandrena) viridiaenea Pérez, 1903 is returned to synonymy with A. nigroviridula. Relative to the 2020 baseline, 16 Andrena species are newly recorded for Morocco, and six species are removed from the faunal list. These revisions bring the total number of Andrena species known from Morocco to 202 with 25 endemic species, making it one of the hotspots for Andrena diversity globally.

French Operation Barkhane in Africa – success or failure?

Operation Barkhane began in August 2014 and was a continuation of Operation Serval, targeting Al-Qaeda in the Islamic Maghreb (AQIM) structures. The main objective of the French armed presence was to support the local military forces in the fight against terrorism, coordinate the international coalition and support the humanitarian action for the benefit of the local population. The aim of the article is to systematize knowledge and investigate the activities of French entities, also within the EU missions, obliged to fight against terrorism in the Sahel, carrying out the largest antiterrorism operation in Sub-Saharan Africa. France's strategic objective was to help the Sahel countries achieve military self-reliance so that they could provide security and stability in the region without the assistance of foreign forces. Ultimately, France decided to withdraw its soldiers from Mali and Burkina Faso at the beginning of 2022 and had terminated its mission earlier. It was the end of Barkhane and the French antiterrorism involvement on a high scale level in the Sahel. The decision to withdraw has a number of implications for international involvement in the region and will greatly weaken the level of security in the region. This would be very dangerous for Europe, which is not ready for another wave of migration, as well as the international threat of terrorism. It must be indicated that France have maintained a relatively secure situation in the Sahel region.

Complementarity of wind and solar power in North Africa: Potential for alleviating energy droughts and impacts of the North Atlantic Oscillation

With growing gas and oil prices, electricity generation based on these fossil fuels is becoming increasingly expensive. Furthermore, the vision of natural gas as a transition fuel is subject to many constraints and uncertainties of economic, environmental, and geopolitical nature. Consequently, renewable energies such as solar and wind power are expected to reach new records of installed capacity over the upcoming years. Considering the above, North Africa is one of the regions with the largest renewable resource potential globally. While extensively studied in the literature, these resources remain underutilized. Thus, to contribute to their future successful deployment and integration with the power system, this study presents a spatial and temporal analysis of the nature of solar and wind resources over North Africa from the perspective of energy droughts. Both the frequency and maximal duration of energy droughts are addressed. Both aspects of renewables’ variable nature have been evaluated in the North Atlantic Oscillation (NAO) context. The analysis considers the period between 1960 and 2020 based on hourly reanalysis data (i.e., near-surface shortwave irradiation, wind speed, and air temperature) and the Hurrel NAO index. The findings show an in-phase relationship between solar power and winter NAO index, particularly over the coastal regions in western North Africa and opposite patterns in its eastern part. For wind energy, the connection with NAO has a more zonal pattern, with negative correlations in the north and positive correlations in the south. Solar energy droughts dominate northern Tunisia, Algeria, and Morocco, while wind energy droughts mainly occur in the Atlas Mountains range. On average, solar energy droughts tend not to exceed 2–3 consecutive days, with the longest extending for five days. Wind energy droughts can be as prolonged as 80 days (Atlas Mountains). Hybridizing solar and wind energy reduces the potential for energy droughts significantly. At the same time, the correlation between their occurrence and the NAO index remains low. These findings show the potential for substantial resilience to inter-annual climate variability, which could benefit the future stability of renewables-dominated power systems.