Chorological analysis and morphological variations of Saurians of the genus uromastyx (Reptilia, Agamidae) in western Sahara: Description of two new taxa.

[ES]Se describe una nueva especie del género Uromastyx sobre la base de dos especímenes procedentes del Adrar Sutuf (Sahara Occidental). Los individuos del nuevo taxón difieren fuertemente de Uromastyx acanthinura por el gran tamaño que llegan a alcanzar los adultos, su siempre mayor número de escamas, la disposición diferente de los tubérculos en los muslos, y por su diseño y coloración. Sus características generales se asemejan a las de Uromastyx aegyptia, un hecho que sugiere la posible existencia de lagartos del complejo U. aegyptia en poblaciones relícticas a lo largo del desierto del Sahara.

La Sección Femenina en la "llamada de África": Saharauis y guineanas en el declive del colonialismo español

[ES] La «llamada de África» supuso para Sección Femenina una estrategia de expansión y, en buena medida, de empoderamiento. La misión franquista colonial de españolización influyó en la construcción local del género de «provincias españolas» como Guinea y Sahara. Esta investigación etnográfica e histórica se centra en dicha estrategia «desarrollista» y modernizadora en ambas regiones de África, desvelando entre otros, el significativo contraste entre la extraordinaria riqueza de fuentes de archivo sobre las regiones africanas y la limitada producción de estudios publicados sobre la temática, aunque el interés en la materia ha despertado recientemente, incluidas las propias autoras del texto.

The Acridian plagues, a new Holocene and Pleistocene palaeoclimatic indicator

[EN] Five palaeosols, intercalated within the Quaternary dune beds of Fuerteventura and Lanzarote (Canary Islands), off the Moroccan coast, mark wetter climatic episodes. In all of them, billions of calcified insect ootheca testify to past occurrences of Acridian plagues, such as those reaching the western Sahara following heavy rainfall events over the Sahel.

Grain size, morphometry and mineralogy of airborne input in the Canary basin: evidence of iron particle retention in the mixed layer

[EN]Aeolian dust plays an important role in climate and ocean processes. Particularly, Saharan dust deposition is of importance in the Canary Current due to its content of iron minerals, which are fertilizers of the ocean. In this work, dust particles are characterized mainly by granulometry, morphometry and mineralogy, using image processing and scanning northern Mauritania and the Western Sahara. The concentration of terrigenous material was measured in three environments: the atmosphere (300 m above sea level), the mixed layer at 10 m depth, and 150 m depth. Samples were collected before and during the dust events, thus allowing the effect of Saharan dust inputs in the water column to be assessed. The dominant grain size was coarse silt

Grain size, morphometry and mineralogy of airborne input in the Canary basin: evidence of iron particle retention in the mixed layer

[EN] Aeolian dust plays an important role in climate and ocean processes. Particularly, Saharan dust deposition is of importance in the Canary Current due to its content of iron minerals, which are fertilizers of the ocean. In this work, dust particles are characterized mainly by granulometry, morphometry and mineralogy, using image processing and scanning northern Mauritania and the Western Sahara. The concentration of terrigenous material was measured in three environments: the atmosphere (300 m above sea level), the mixed layer at 10 m depth, and 150 m depth. Samples were collected before and during the dust events, thus allowing the effect of Saharan dust inputs in the water column to be assessed.