6 research outputs found
Brazilian cave heritage under siege
info:eu-repo/semantics/publishe
ï»żTwo new sympatric cave species of Castellanethes (Isopoda, Oniscidea, Olibrinidae) from Western High Atlas of Morocco
Two new sympatric isopod species of the genus Castellanethes (Olibrinidae) are described from caves located in the Western High Atlas of Morocco. Both species present troglomorphic traits, such as the absence of body pigmentation and eyes and are, therefore, considered cave-dwelling species (troglobitic). Castellenethes ougougensis sp. nov. was found in five caves, while C. ighousi sp. nov. is an amphibious species found in only two caves, which also harbour populations of C. ougougensis sp. nov. Additionally, notes on their habitats are provided, as well as a discussion on their conservation status
First record of Pisidium subtruncatum Malm, 1855 (Bivalvia, Sphaeriidae) in an African cave
Volume: 34Start Page: 99-10
LâINTĂRĂT DE LâOCT-SA DANS LA SURVEILLANCE DE LA GREFFE DE MEMBRANE AMNIOTIQUE
Introduction :La perforation de cornĂ©e est une situation pathologique frĂ©quente en urgence ophtalmologique.Et la greffe de membrane amniotique garde sa place dans sa prise en charge en favorisant l'Ă©pithĂ©lialisation cornĂ©enne Ă lâaide de ses caractĂ©ristiques anti-fibrotiques, anti-inflammatoires, anti-angiogĂ©niques et antimicrobiennes.Le But du travail est dâanalyser les caractĂ©ristiques structurales de la cornĂ©e et de la membrane amniotique et dâĂ©valuer les changements de la membrane aprĂšs son intĂ©gration Ă la cornĂ©e Ă lâaide de lâOCT-SA.MatĂ©riel et mĂ©thode : Ă©tude prospective menĂ©e au sein du service dâophtalmologie du centre hospitalier Mohammed VI de Marrakech, et portant sur 63 cas de perforations cornĂ©ennes, dâulcĂšres profonds ou prĂ©-perforatifs.RĂ©sultats :31 patients ont prĂ©sentĂ© un ulcĂšre perforĂ©, 23 ont prĂ©sentĂ© un ulcĂšre prĂ©-perforatif et 9 ont eu une perforation cornĂ©enne post-traumatique.93,6% des patients ont bĂ©nĂ©ficiĂ© dâune greffe de membrane amniotique en multicouches.LâOCT-SA a Ă©tĂ© rĂ©alisĂ©e avant le geste opĂ©ratoire Ă chaque fois que cela Ă©tait possible.A J2, lâĂ©paisseur moyenne de la membrane amniotique inlay Ă©tait de 231±132”m. A J8, cette Ă©paisseur a diminuĂ© Ă 112±40”m. A J25, plus de 90% des malades ont intĂ©grĂ© la membrane dans lâĂ©paisseur cornĂ©enne avec une Ă©paisseur cornĂ©enne moyenne de 495±85”m.LâintĂ©gration de cette membrane a Ă©tĂ© associĂ©e Ă la fibrose partielle de cette derniĂšre, permettant ainsi la restitution de lâĂ©paisseur cornĂ©enne et la rĂ©gĂ©nĂ©ration cornĂ©enne.Discussion:La greffe de membrane amniotique constitue une meilleure alternative dans la prise en charge des perforations cornĂ©ennes et les ulcĂšres prĂ©-perforatifs. Dans le suivi de la greffe de membrane amniotique, lâexamen Ă la LAF reste indispensable. Pourtant, le monitorage par OCT-SA permet de faire une meilleure quantification de lâĂ©paisseur cornĂ©enne et de sa structure.Conclusion :La greffe de membrane amniotique est la meilleure alternative dans la prise en charge des perforations cornĂ©ennes et des ulcĂšres prĂ©-perforatifs. Son intĂ©gration Ă lâĂ©paisseur cornĂ©enne est toujours associĂ©e Ă sa rĂ©-Ă©pithĂ©lialisation. Ainsi, lâOCT-SA constitue lâexamen de choix pour une meilleure surveillance de lâintĂ©gration de cette membrane
Impacts of Anthropogenic Factors on the Groundwater Ecosystem of Fezouata in South-East of Morocco
The depletion of aquifer systems in arid and semiarid regions worldwide is causing acute water scarcity and quality degradation, and leading to extensive ecosystem damages. Groundwater is exposed to a variety of anthropogenic water pollution, such as raw wastewater disposal in the Draa Wadi and the use of septic tanks. In this respect, a study performed in some wells of Fezouata (South-east of Morocco) aimed at both discovering the main components of the aquatic subterranean fauna unknown up to now in this area, and the potential relationships between this fauna and the water quality The principal physico-chemical characteristics of water were measured between November 2019 to March 2021 for 15 wells, which were selected considering their position with respect to the pollution sources known in surface. The Fezouata groundwater is distinguished by its high salinity with an increasing gradient from upstream to downstream. The aquatic fauna in the 15 wells showed 12 stygofauna species. In the protected wells which are situated far from the pollution sources, the fauna is dominated by Cirolanidae, Hydrobiidae, Metacrangonctydae, Stenasellidae, and Thermosbaenacea. On the other hand, in the less protected well, close to the pollution sources, the fauna is made of epigean species, such as insectâs larva, mainly Culicidae and Chironomidae. The analysis of the water quality and the subterranean biodiversity shows that the latter decreases with increasing groundwater pollution. It seems that the impact of the acute pollution affected the stygocenose even by reducing drastically the biodiversity
Life in darkness: an overview of cave-adapted japygids (Hexapoda, Diplura)
Few species of Japygidae (Diplura) have been discovered in cave ecosystems despite their importance as large predators. A small collection of rare specimens of this hexapod group has allowed to explore the taxonomy of japygids from caves in New Zealand, Morocco and South Africa, and to describe one new genus: Imazighenjapyx Sendra & SĂĄnchez-GarcĂa gen. nov., as well as four new species: Austrjapyx wynbergensis Sendra & SĂĄnchez-GarcĂa sp. nov., Imazighenjapyx marocanus Sendra & SĂĄnchez-GarcĂa gen. et sp. nov., Opisthjapyx naledi Sendra & SĂĄnchez-GarcĂa sp. nov. and Teljapyx aotearoa Sendra & SĂĄnchez-GarcĂa sp. nov. For each of the new taxa we give a comprehensive description of their habitats. These new findings resulted in a revision of the distribution and allowed to re-evaluate the morphological traits of the fifteen cave-adapted japygids species already known worldwide. The functional morphology of the remarkable abdominal pincers of Japygidae and their adaptation to predation are discussed, as well as their potential role in mating behaviour