bluuebunny/crossref_metadata_2025_split huggingface dataset:
Changements climatiques en zones nord-soudanienne et sub-sahélienne du Burkina Faso : comparaison entre savoirs paysans et connaissances scientifiques
Authors: Bambara Dasmané , Thiombiano Adjima , Hien Victor 
Published: November 2022

Climate change in north-sudanian and sub-sahelian zones of Burkina Faso : Comparison between producers’ knowledge and scientific knowledge.
Coherence between farmers’ knowledge about climate change and its relevance to climate trends could allow drawing up sustainable adaptation strategies. Survey carried out in north-sudanian and sub-sahelian parts of Burkina Faso allowed to collect 16 indigenous indicators of climate change and to assess their reliability in comparison to the results of analysis of 23 appropriate climate variables. Survey data collected were submitted to frequency and variance analyses to assess farmers’ perception differences between climatic zones. Climatic data were submitted to : (i) analysis of variance, (ii) tests of Pettitt and Hubert, (iii) tests of Ati et al. and Maikano, (iv) Nicholson index to determine changes noticed between periods of time 1951-1980 and 1981-2010, and during the reference period 1951-2010. We considered that indigenous knowledge and scientific one are in accordance when they do not provide contrasting information. Fourteen indicators of rainfall, four indicators of temperature and four indicators of wind speed were enumerated by producers. Local indicators perception rates (number of persons who perceived the indicators from the whole interviewees) ranged between 10 and 90 % and 22.7 % of the indicators showed significant difference (p < 0.05) of perception in both climatic zones. Eighteen (from the 23) climatic variables showed significant change (p < 0,05) in north-sudanian area versus 10 in sub-sahelian zone between periods of time 1951-1980 and 1981-2010. During the reference period of time, the 23 climatic variables showed 26 dates of rupture in north-sudanian area versus 21 in sub-sahelian zone. Rainy seasons shortened in both climatic zones. Dry season rainfall frequency and full rainy season dry spell frequency did not show major change. The application of Nicholson index showed a great interannual fluctuation of the parameters, strengthening this way the evolution of changes and ruptures detected in the series. In both climatic zones, 56 % of local indicators were in accordance with climate trends. Integrating indigenous and scientific knowledge by introducing consulting and discussing framework really participatory and functional could ensure their complementarity and then allow drawing up appropriate, consensual and sustainable adaptation actions to climate change.
Holothuries d’intérêt commercial des récifs de l’archipel des Glorieuses (îles Éparses, France), canal du Mozambique : abondances, tailles et impact de la pêche illicite
Authors: Mulochau Thierry , Gigou Alexandra 
Published: November 2022

Commercial holothurians of the Glorieuses Archipelago (Eparses Islands, France), Mozambique Channel : abundances, sizes and impact of illegal fisheries.

Due to their isolation, Eparses Islands provide a valuable opportunity to investigate biodiversity in the absence of anthropogenic influence. The Glorieuses Archipelago (11° 35’ S, 47° 18’ E) forms part of the Eparses Islands in the north of Mozambique Channel (Western Indian Ocean). The inventory and abundance assessment of the commercial holothurians (Echinodermata), were carried out in October 2015 as part of the PANAMAG (PAtrimoine NAturel MArin des Glorieuses) programme. Specimens were identified, photographed and measured in length, on the reef slopes at 22 sites down to 20 m, the inner slopes at 3 sites and the reef flats at 32 sites. Given the worldwide overexploitation of holothurians, it is important to know their present diversity and distribution in such remote areas. The commercial holothurians included 12 species in Glorieuses Islands. Their abundances are low in comparison with some other islands in the SWOI such as Mayotte and Réunion Island. Bohadschia atra is the most common and abundant, as in Mayotte and Banc du Geyser, with an average of 118 (± 60.6) individuals by hectare in the inner slopes. Measurements of the length of B. atra have shown that the individuals are smaller on reef flats and inner slopes and bigger on the reef slopes. Actinopyga miliaris was found for the first time in Glorieuses, however,
Holothuria fuscogilva, species with high commercial value, has not been found since 2011. The abundances of holothurians are very low in the reef flats of Lys Island, particularly Holothuria nobilis (0.3 ind/ha ± 2.6) and
Thelenota ananas (0 ind/ha). They are species with high commercial values and listed as “endangered” in the IUCN red list indicating an impact of the illegal fisheries in this area of the Glorieuses Islands. Of all the reef flats of the Glorieuses, Lys Island has the lowest abundance of B. atra, a species with medium commercial value.
Thelenota ananas was not found on the reef slopes of Lys Island. Strong action is necessary to stop the illegal fisheries on Lys Island.
Environmental factors influencing odonata communities of three mediterranean rivers : Kebir-East, Seybouse, and Rhumel Wadis, northeastern Algeria
Authors: Yalles Satha Amina , Samraoui Boudjéma 
Published: November 2022

Facteurs environnementaux influençant les communautés d’Odonates de trois rivières méditerranéennes : les oueds Kebir-Est, Seybouse et Rumel, nord-est algérien.
Les Odonates sont une composante importante des peuplements des milieux lotiques et leur abondance et diversité renseignent sur l’intégrité écologique de ces hydrosystèmes. L’inventaire odonatologique de trois oueds majeurs algériens : Kebir-Est, Seybouse et Rhumel, a permis l’identification de 40 espèces. Nos résultats révèlent la présence de Calopteryx exul, endémique maghrébin, dans l’oued Seybouse et semblent confirmer l’extinction de la population type dans l’oued Rhumel où l’espèce avait été découverte au XIXe siècle. Nos résultats indiquent également l’expansion de plusieurs espèces : Coenagrion caerulescens, Orthetrum nitidinerve, Trithemis kirbyi et Urothemis edwardsii dont la population relictuelle est en danger critique d’extinction. La mesure de diverses variables physicochimiques (altitude, température, conductivité, etc.) nous a permis d’explorer une possible co-structure entre les jeux de données faunistiques et de variables environnementales. L’analyse des données indique que la richesse spécifique est, selon l’oued, variablement correlée à l’hydropériode, à la conductivité et à la température de l’eau, suggérant son utilité dans l’évaluation de l’intégrité écologique des cours d’eau méditerranéens.
Variation saisonnière de la structure d’âge et de la sex-ratio de la population deRousettus madagascariensis (Yinpterochiroptera : Pteropodidae) à Ankarana, Nord de Madagascar
Authors: Noroalintseheno Lalarivoniaina Oliva S. , Rajemison Faneva I. , Andrianarimisa Aristide , Goodman Steven M. 
Published: November 2022

Seasonal variation in the age and sex structure of Rousettus madagascariensis (Yinpterochiroptera : Pteropodidae) in Ankarana, northern Madagascar.
The purpose of this study was to examine seasonal variation in age and sex structure, as well as the disparity in the proportion of males and females of different age groups, of a population of Rousettus madagascariensis roosting in the Grotte des Chauves-souris, Ankarana, northern Madagascar. The study included 1196 individuals captured during six visits in both the dry (September 2014, 2015, 2016, November 2016) and wet seasons (January 2015, 2016). Adjustment and homogeneity χ² tests were used to determine whether the sex ratio deviated from equilibrium (1:1) and if the age-sex structure of the population varied between seasons. Neonates were present only during the wet season and the sex ratio (SR) of this age group was in equilibrium. On the basis of trap captures, juveniles and adults, were more numerous during the dry season than the wet season. Regardless of season, the proportion of adults was always higher than that of juveniles. Among juveniles, the sex ratio was biased in favor of males during the wet season (January 2015: SR = 4, January 2016: SR = 1.66), whereas during the dry season, females predominate (September 2014: SR = 0.67 ; September 2015: SR = 0.30 ; September 2016: SR = 0.13). In adults, the sex ratio was biased towards females during the wet season and males during the dry season (January 2015: SR = 0.56, January 2016: SR = 0.22, September 2014: SR = 1.77, September 2015: SR = 1.70, September 2016: SR = 2.50). The seasonal patterns in Rousettus madagascariensis associated with the day roosting site show two clear differences with regards to age (juvenile and adult) and sex (males and females).
Influence de l’état sanitaire des glands sur la régénération de Quercus suberen Tunisie
Authors: Jdaidi Nouri , Chaabane Abbès , Toumi Lamjed , Hasnaoui Brahim 
Published: November 2022

Influence of the sanitary state of acorns on the regeneration of Quercus suber in Tunisia.
In Tunisia, Cork oak forests represent ecosystems of fundamental ecological importance for the preservation of genetic resources and for environmental protection at both national and global scale. They present numerous assets in touch with their great biological diversity and their impact on the environmental and socioeconomic balance. The object of the present study was the characterization of the natural regeneration of Cork oak and of the action of insects on acorns. It allowed us to spot certain parameters linked to the biology and to the ecology of the Cork oak generally and to the acorns in particular, in North-western Tunisia. We determined the various biometric parameters of acorns according to whether they were healthy or affected by insects, such as length, diameter and weight of acorns coming from different strata of harvests and different exposures. We showed that acorns affected by insects have their length, diameter and weight lower than the non-affected healthy ones. The importance of the attacks of acorns by insects explains partially the deficiency of the natural regeneration of the Cork oak observed in our forests. This situation causes modifications at the level of the structure, diversity and density of seedlings. Our results allow recommendations for the natural regeneration of cork oak : (i) for the seedling by acorn use non-attacked acorns and avoid collecting acorns which had fallen on the ground ; (ii) use also the technique of rejections of origins.
Variations saisonnières du régime alimentaire du Fennec, Vulpes zerda (Canidae, Carnivora), en Algérie
Authors: Khechekhouche E. , Brahmi Karima , Kerboub A. , Slimani S. , Bissati Samia , Doumandji Salaheddine , Aulagnier Stéphane 
Published: November 2022

Seasonal variation of the diet of the Fennec fox, Vulpes zerda (Canidae, Carnivora), in Algeria.
The seasonal diet of the Fennec fox, Vulpes zerda, has been investigated in Ben Ahmed, Ghardaïa region (northern Sahara, Algeria) using scat content analysis. In 130 scats collected from autumn 2010 to spring 2011 we identified 726 animal prey items belonging to 17 orders, 30 families and 75 species. The main preys were insects (554 individuals), followed by mammals (142 individuals) and arachnids (14 individuals). However, biomass was dominated by mammals, (86.5 %), followed by insects (10.7 %) and birds (1.2 %). Similar patterns were observed among the seasons, but the frequencies of the main contributing taxa were significantly different. Autumn was the season when mammals were the most consumed ; in winter Isoptera were the most numerous preys ; in spring Orthoptera and Arachnida were abundantly fed upon, whereas predation of Coleoptera, squamates and birds were similar along the seasons. These results confirm that the fennec fox is an opportunistic predator.
Évaluation de la dynamique de l’occupation du sol dans la zone humide Ramsar de Tahaddart (Nord-ouest du Maroc)
Authors: Rifai Nabil , Khattabi Abdellatif , Moukrim Said , Arahou Moustapha , Rhazi Laïla 
Published: November 2022

Assessment of land cover dynamics in the Tahaddart Ramsar wetland (North-western Morocco).
Land cover and land cover dynamics, in both time and space, were analysed in the Tahaddart wetland (Northern Morocco) to determine the evolution of the environmental quality of this Site of Biological and Ecological Interest (since 1996), also classified as a Ramsar site (since 2005). Remote sensing was used to estimate the impact of land use changes on natural habitats over a 35-year period from 1978 to 2013. The first image used MSS captures from 1978 with a spatial resolution of 80 m. The resolution was improved since 1991 with the use of Landsat 4 satellite images (spatial resolution of 30 m in multi-band modes) and then with satellite images from Landsat 7 and 8 (spatial resolution of 15 m in panchromatic mode). The images were classified and then analysed using Erdas Imagine 9.2 software program. The results were verified using a confusion matrix, which provided a global precision rates ranging from 82 to 86 %. This qualitative data on the land cover evolution revealed that despite its important conservation status, the Tahaddart wetland has been subject to substantial changes over time. Important declines in natural habitats such as forests, estuarine vegetation and sand dunes were observed for the benefit of an increase of areas of urbanization and bare soil. This analysis demonstrates the important anthropogenic pressures that affect the site and the need to enforce current legislation in order to conserve local biodiversity over the long-term.
Dynamique des formes de résistance des amibes entéropathogènes en milieu aquatique pollué (Yaoundé, Cameroun)
Authors: Ajeagah Gideon Aghaindum , Biyong Mbondo Serge , Tchouankep Kapso Mireille 
Published: November 2022

Dynamics of resistant entero-pathogenic amoeba in a polluted aquatic habitat (Yaoundé, Cameroon).
A study aimed at assessing the infectious forms of entero-pathogenic amoeba and the impact of physico-chemical variables on their distribution in waste and surface water of the city of Yaoundé was carried out from December 2012 to May 2013. The bioecological assessment of the amoeba load was carried out in 2015-2016. Monthly sampling was carried out on six points, that is two on the Messa residential effluent (before and after the purification station) and four sampling points on the Mingoa river basin. The physico-chemical analyses, carried out by volumetry and spectrophotometry, revealed that the waste water and surface water were lowly acidic (6.97 ± 0.3 UC), lowly oxygenated (22.83 ± 17.15 %), highly mineralized (408.00 ± 292.07 μS/ cm) and presented a high DBO5 value (83.86 ± 69.28 mg/ L O2). The values of this physico-chemistry reveal a high domestic pollution at the effluent and an input of organic matter at the Mingoa stream, due to antropogenic activity. The observation of the cysts was done with an Olympus model CK2 microscope at objective 40X, after concentration of the samples according to the techniques of direct observation and Merthiolate-Iode-Formol. The analyses proof the spatial and seasonal presence of cysts (454.60 ± 625.57 cysts/ L) of enteropathogens such as
Entamoeba coli, Entamoeba histolytica, Entamoeba hartmanni, Endolimax nana and Pseudolimax butschlii. High correlations were observed between some physico-chimical and biological parameters. There is thus a faecal pollution of waters and human populations are exposed to sanitary risks, particularly amoebioses.
Characterization of cadmium-resistant bacteria isolated from polluted soils in Algeria, and evaluation of cadmium removal, using living free and immobilized cells
Authors: Yakoubi Lila , Benmalek Yamina , Benayad Tahar , Fardeau Marie-Laure 
Published: November 2022

Caractérisation des bactéries cadmium-résistantes isolées de sols pollués en Algérie et évaluation de l’élimination du cadmium en utilisant des cellules libres ou immobilisées.
La pollution des sols par les métaux lourds est un problème particulièrement préoccupant du fait de leur toxicité et de leur non biodégradabilité. Dans ces environnements, les bactéries développent divers mécanismes de résistance qui leurs confèrent la capacité à accumuler ces métaux. Dans cette étude, vingt-trois bactéries cadmium-résistantes ont été isolées de trois sols algériens et ont été caractérisées. Deux isolats (YL-SS8, YL-SS3), hautement résistants au cadmium, ont été sélectionnés et identifiés par séquençage du gène de l’ARNr 16S, puis testés pour leur capacité à capturer les ions cadmium. Les résultats ont révélé que les bactéries caractérisées appartenaient à neuf familles et dix genres, tandis que les deux souches les plus résistantes sélectionnées, ont été identifiées comme Bacillus infantis et Pseudomonas fluorescens. Les concentrations minimales inhibitrices ou CMI oscillaient entre 500 μg. mL-1 et 1100 μg. mL-1. Les souches YL-SS8 etYL-SS3 ont montré les CMI les plus importantes, de l’ordre de 1100 μg. mL-1 et 900 μg. mL-1 respectivement. Les cellules libres vivantes de B. infantis ont prélevé environ 90 μg. mL-1 de cadmium, alors que celles de P. fluorescens ont capturé 81 μg. mL-1 après 24 heures de contact. Dans le même temps, les cellules immobilisées ont accumulé des concentrations en cadmium légèrement plus importantes avec des valeurs respectives de 93 μg. mL-1 et 85 μg. mL-1. En raison de leur forte résistance et de leur importante capacité d’accumulation du cadmium, les deux isolats bactériens pourraient être exploités pour l’assainissement biotechnologique du cadmium dans les sols contaminés par les métaux lourds.
Palaeoecological significance and conservation of peat-forming wetlands of Algeria
Authors: Ghit Karima , Muller Serge , Bélair Gérard de , Belouahem Abed Djamila , Daoud-Bouattour Amina , Benslama Mohamed 
Published: November 2022

Signification paléoécologique et conservation des zones humides tourbeuses d ’ Algérie
Les complexes humides de Numidie (Maghreb nord-oriental) abritent des milieux tourbeux dont l’histoire est très mal connue. Des études palynologiques ont été réalisées dans une aulnaie et une ériçaie tourbicole du complexe de Guerbès-Senhadja, dans le but de préciser leur origine, leur histoire et leur signification paléoécologique. Les séquences étudiées remontent à 8000 et 5300 ans , respectivement pour l’ériçaie et l’aulnaie. L’ériçaie à Erica scoparia , jamais décrite sur le plan phytosociologique, apparaît comme une formation ancienne et bien préservée, à très fort enjeu conservatoire. L’aulnaie a en revanche une origine récente (< 2000 ans), possiblement en lien avec une (ré-) immigration holocène de l’aulne depuis l’Europe méridionale. Les dégradations anthropiques très fortes subies par les milieux étudiés au cours des dernières années rendent urgentes l’implémentation de mesures conservatoires drastiques dans le but de préserver les derniers vestiges régionaux de ces milieux humides patrimoniaux.
Prise en compte des espèces de cohérence nationale trame verte et bleue dans les schémas régionaux de cohérence écologique
Authors: Sordello Romain 
Published: November 2022

Species for a national coherence of the French Green and Blue Infrastructure (TVB program) : how have they been taken into account in the Regional Ecological-Continuity Plans (SRCE) ?
The “Trame verte et bleue” (TVB) is a French public policy that aims to better include biodiversity in territorial planning and particularly to reduce habitat fragmentation. The overall objective is to preserve and restore an ecological network, consisting of biodiversity cores and corridors linking them. For that purpose, TVB policy is deployed on several territorial levels. On the national level, a framework document (titled ON-TVB) presents the main objectives of the program. In particular, the ON-TVB lists some animal species for each French regions that have a national responsibility to protect them. The French regions had to take into account (within the meaning of legal enforceability) those TVB species within their regional schemes (named SRCE). Now that SRCE are adopted, it is time to have an overview of this new and original system and to evaluate its efficacity and effectivity from a technical and scientific point of view. In this work, two methods to take into account the TVB species have been identified to make this assessment : i) using the TVB species to design the regional ecological network or ii) checking retrospectively that the TVB species are actually present in the regional ecological network. The results show that two-thirds of the French regions used one of those two methods. About half of the French regions took into account the TVB species using them to design their cores and corridors. Almost one third of the French regions checked the proportion of the TVB species distribution found in their regional ecological network. Yet, to look forward this first analysis based on SRCE review, an independent assessment is needed to verify that the TVB species were sufficiently taken into account. As for now, in view of those results, it’s already possible to suggest that the ON-TVB better clarify what “ to take into account” means and what is expected of the regions about the TVB species. Such a consolidation of the ON-TVB is all the more necessary in the current context in which SRCE are being integrated with other regional plans into a new inclusive regional scheme (named “Sraddet”).
Bioindicateurs des milieux aquatiques lotiques en république centrafricaine : macro-invertébrés benthiques et pression anthropique du cours d’eau Nguitto
Authors: Ngoay-Kossy Jean Clair , Zébazé Togouet Serge Hubert , Wango Solange Patricia , Bolevane Ouantinam Serge Florent , Tchakonté Siméon , Piscart Christophe 
Published: November 2022

Bioindicators of running freshwaters in Central African Republic : benthic macroinvertebrates and anthropogenic stress in the Nguitto Stream.
This study of benthic macroinvertebrates in Central African Republic (CAR) aimed at determining the structure of their assemblages in relation to the physico-chemical quality of the Nguitto River. The data were collected monthly from May 2015 to April 2016, in five selected sampling points on the Nguitto River. The physico-chemical parameters were measured using standard methods while the benthic macrofauna was collected using a handnet sampler of 150 μm mesh size on a total area of about 6 m² per station. The physico-chemical analysis revealed a satisfactory water quality in the forest belt and an eutrophication in the urban area. A number of 2052 individuals of benthic macroinvertebrates belonging to 71 taxa were identified and counted. Arthropods was the most diversified (53 taxa) and the most abundant (80.75 %) taxonomic group, followed by molluscs (17 taxa ; 23.94 %) and annelids (1 taxon ; 0.24 %). The sampling points in the forest belt, which exhibit the lowest anthropogenic activity, were composed mostly of arthropods and dominated by insects. In the urban zone, the strong abundance of molluscs and the presence of annelids indicated an anthropogenic pressure and the usefulness of invertebrates as bioindicators of waste waters in this area.
High-power narrow-linewidth diode laser based on external cavity feedback technology for Yb: YAG pumping
Authors: Han Jinliang , Zhang Jun , Shan Xiaonan , Zhang Yawei , Peng Hangyu , Qin Li , Wang Lijun 
Published: November 2022

Abstract
An external cavity feedback structure based on volume Bragg grating is introduced to realize the spectral stabilization and linewidth narrowing of a diode laser with a central wavelength of 968.668 nm and a spectral linewidth of 0.405 nm. A diode laser source producing 1.443 kW power from an output fiber with a core diameter of 1000 μm is achieved by using a spatial beam, combining, and polarization multiplexing technologies. The external cavity feedback and fiber coupling efficiencies exceed 93% and 90%, respectively. Such a high-power narrow-linewidth diode laser can be applied in Yb: YAG pumping efficiently and stably.