bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of periodic defoliations by Thaumetopoea pityocampa Schiff. on radial growth in cedar woodland in Chréa, Algeria
Authors: Sbabdji Mohamed , Lambs Luc , Haddad Ahmed , Kadik Bachir
Published: November 2022

Effet des défoliations périodiques par Thaumetopoea pityocampa Schiff. sur la croissance radiale des cèdres du Chréa, Algérie.

La forêt emblématique de cèdres (Cedrus atlantica Manetti) du parc national de Chréa, 40 km au sud-ouest d’Alger, est attaquée par la Processionnaire du pin (Thaumetopoea pityocampa Schiff.). Nous avons étudié l’impact des pullulations successives de cette processionnaire entre 1980 et 2009 sur la croissance des cèdres pour voir si un éventuel effet cumulatif pourrait affecter la vitalité de ces arbres. Nous avons corrélé la largeur des cernes de croissance (dendrochronologie) aux décomptes de nids de processionnaires afin de déterminer les pertes de croissance et les temps de récupération. La population du papillon culmine tous les 5 ou 6 ans, les arbres étant sévèrement défoliés durant les pics d’explosion de chenilles. Après 3 années d’attaque, la population de l’insecte disparaît pendant 2 ou 3 ans, durant lesquels la croissance des cèdres se rétablit. Il n’y a pas d’effet cumulatif sur la croissance des arbres. Les résultats suggèrent que ces derniers résistent aux défoliations. Toutefois, on ne sait pas clairement combien de temps peut perdurer cet équilibre. Les effets de l’homme et du changement climatique peuvent affecter la vitalité de la cédraie et en modifier la dynamique.
Réponses des populations de reptiles à l’éradication du Rat noir (Rattus rattus) sur l’île de Bagaud (parc national de Port-Cros, Var, France)
Authors: Krebs Elise , Abba Alain , Gillet Pascal , Eudeline Rémy , Gauthier Joël , Le Quilliec Patricia , Lorvelec Olivier , Martinerie Gabriel , Vidal Éric , Buisson Elise
Published: November 2022

Responses of reptile populations to the eradication of the Roof Rat (Rattus rattus) on Bagaud Island (Port-Cros National Park, Var, France). — An eradication of two invasive taxa, the Roof Rat (Rattus rattus) and Ice plants (Carpobrotus spp.), was undertaken in 2011 and 2012 on the protected nature reserve of Bagaud island, located in Port-Cros national Park (south-eastern France). R. rattus eradication was successful while Carpobrotus spp. eradication is still in progress. To assess the effects of R. rattus eradication on island reptile populations (Montpellier Snake Malpolon monspessulanus, European Leaf-toed Gecko Euleptes europaea, Common Wall Lizard Podarcis muralis), a pre-eradication monitoring was conducted in 2010 and 2011, and a post-eradication monitoring in 2013 and 2014. Census was performed with three semi-quantitative methods : (1) three transects of 80 m long and 2 m wide ; (2) two quadrats 1225 m² ; (3) five rocky microsites, habitats for E. europaea. Very few individuals of M. monspessulanus were observed. Significant results were obtained only for E. europaea : after eradication, the number of observed juveniles increased and all observed individuals, independently of their age groups, were more outside shelters than inside. These results can be explained by the loss of avoidance behaviour that E. europaea displayed when in presence of R. rattus, and by lower predation pressure, given that both species are nocturnal. The elapsed time since eradication of R. rattus is quite short and some species have not necessarily visibly responded demographically. Additional monitoring in the coming years will provide further insights.
Multiple introductions and admixture at the origin of the continental spread of the fungal banana pathogen Mycosphaerella fijiensis in central america : a statistical test using approximate bayesian computation
Authors: Robert Stéphanie , Zapater Marie-Françoise , Carlier Jean , Abadie Catherine , Ravigné Virginie
Published: November 2022

Introductions multiples et mélange à l’origine de l’expansion continentale du champignon pathogène du bananier Mycophaerella fijiensis en Amérique centrale : un test statistique utilisant le calcul bayésien approché. — La reconstruction des histoires d’invasions est l’un des principaux défis de la biologie des invasions. L’ascomycète Mycophaerella fijiensis, agent causal de la maladie des raies noires des bananiers, en provenance d’Asie du Sud-Est, a commencé à envahir le continent américain en 1972 et est aujourd’hui présent dans toutes les régions productrices de bananes d’Amérique. Dans une précédente étude de la structure génétique des populations à l’échelle mondiale, nous supposions que l’invasion américaine pourrait avoir résulté d’introductions multiples et de mélange. Ici, nous avons cherché (i) à tester statistiquement cette hypothèse, et (ii) à inférer les caractéristiques démo-génétiques de cette introduction, en utilisant une technique de choix de scénario par calcul bayésien approché (ABC). Pour ce faire, nous avons confronté sept scénarios d’introduction de la maladie à des données précédemment acquises de génotypage à 21 locus microsatellites de six populations américaines, deux populations d’Asie du Sud-Est et une population océanienne. Nous avons pu démontrer fermement une contribution de l’Océanie à cette invasion, le scénario de mélange ayant reçu une probabilité a posteriori élevée (environ 0,7). Les populations sources semblent avoir des tailles efficaces élevées (de l’ordre de 104). Les populations envahissantes ont subi un goulot d’étranglement fort, de l’ordre d’une centaine d’individus pendant environ 5 ans (50 générations). Au total, ces résultats sont cohérents avec les données historiques et sont compatibles avec l’hypothèse que l’invasion ait commencé à partir de souches fongiques importées accidentellement via des plants de bananiers ramenés de provenances diverses au Honduras dans une collection visant l’amélioration variétale.
Sur une nouvelle station algérienne de Damasonium alisma subsp. polyspermum (Coss.) Maire (Alismataceae) : syntaxinomie et implications conservatoires
Authors: Laribi Mahmoud , Acherar Mohand , Meddour Rachid , Derridj Arezki
Published: November 2022

Les auteurs décrivent une nouvelle station à Damasonium alisma subsp. polyspermum

découverte récemment à Aïn Bessem dans la plaine des Arib. Ils analysent la flore et la végétation des mares temporaires de cette station et de celle de Tiaret (Sersou). L’étude phytosociologique, à l’aide de 12 relevés réalisés selon la méthode de Braun-Blanquet, des communautés végétales dominées physionomiquement par D. alisma subsp. polyspermum permet l’identification de deux associations, le Ranunculetum baudotii (Ranunculion aquatilis), qui se présente ici comme un groupement basal paucispécifique dominé par des renoncules (Ranunculus baudotii et R. trichophyllus), et le Damasonio polyspermi-Crypsidetum aculeati (Verbenion). L’insertion syntaxinomique de ces associations est précisée. L’aspect typique de l’Elatinetum macropodae

(Isoetion), décrit il y a plus d’une cinquantaine d’années dans la mare de Tasselent à Tiaret, n’existe plus, suite à la disparition de cette mare. Les taxons rares n’ont pas été retrouvés (Marsilea strigosa, Antinoria agrostidea, Ranunculus batrachioides, Elatine macropoda, Isoetes velata subsp. dubia, Riella sersuensis), à l’exception de D. alisma subsp. polyspermum qui semble résistant aux facteurs de perturbation. Les résultats obtenus mettent en évidence la nécessité et l’urgence de la mise en place de mesures conservatoires, autant pour ces taxons que pour les mares qui abritent ces communautés hydrophytiques de grande valeur patrimoniale (valeur paysagère, valeur phytocénotique, richesse en taxons protégés et taxons rares), mais sérieusement menacées par les impacts anthropiques.
Peuplement myrmécologique et évaluation de l’invasion de Linepithema humile sur les îles de Marseille (Bouches-du-Rhône, France)
Authors: Berville Laurence , Renucci Marielle , Vidal Patrick , Provost Erick
Published: November 2022

Myrmecological community and assessment of Linepithema humile invasion on Marseille Islands (Bouches-du-Rhône, France).

On islands even more than on continents, intrusive exotic species represent one of the main causes of the biodiversity erosion. Amid all the exotic species, invasive ants are among the most harmful. About 120 years ago, one of them, the Argentine ant (Linepithema humile) settled down on the French Mediterranean coast. In Corsica Island, in spite of a strong expansion since fifteen years, the Argentine ant is only present in a discontinuous way along the coast. This heterogeneous distribution could be due to a biotic resistance of a local species Tapinoma nigerrimum. Recently, a co-occurrence between T. nigerrimum and L. humile was observed on the archipelago of the Frioul (Marseille – France). The presence of these two species, as well as the absence of available data on the myrmecofauna of the archipelago, incited us to begin a prospecting campaign. Twenty-six species of ants were observed on only 1.9 km² ; this is more than 12 % of the French myrmecofauna on less than 0.004 ‰ of its territory. Moreover, the area invaded by L. humile (about 3 % of the archipelago) is bounded by the Mediterranean Sea, a natural environment (with dominance of Messor spp.) and a semi-natural environment (with dominance of T. nigerrimum). The discovery of a front of invasion between T. nigerrimum and the invasive species might allow us to study, in the future, in natura, the resistance of T. nigerrimum face to L. humile, as well as the speed of propagation and thus, better estimate the risks of L. humile

propagation.
Diversité biologique et phytogéographique pour des niveaux différents de salinité dans la région du Chott-Ech-Chergui (Sud-Ouest de l’Algérie)
Authors: Adi Nacère , Amrani Said , Hirche Aziz , Boughani Abdelmadjid , Nedjraoui Dalila
Published: November 2022

Biological and phytogeographical diversity for different levels of salinity in the region of Chott-Ech-Chergui (South-West of Algeria).

The Algerian halophilic areas have been subject to few studies, which remain fragmented. If their floristic, pedological and phytogeographical characterization begins to be better clarified, studies related to changes in the flora and vegetation along a salinity gradient are, however, much rarer. The aim of this present work was to survey, at least partly, such changes in one of the largest saline lakes in Algeria known as the Chott-Ech-Chergui. The a priori surprising results are interesting because they show that, regardless of vegetation type and salinity degree, diversity indices are relatively high. They have the same value, when not larger, as their counterparts in steppe and unsalted presaharan areas. This contrasts with the obvious homogeneity of the landscape dominated by chamaephytes. In reality, it appears that conventional indices such as the Shannon index show here a limit in the conditions of their application. This peculiarity, although known, is rarely mentioned in the scientific literature. The evocation of this methodological problem reinforces the interest of the present work.
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.
Age and growth of pike perch Sander lucioperca (Percidae) in the Ghrib reservoir (northwest Algeria)
Authors: Bouamra Amina , Belaifa Billel , Chaoui Lamya , Kara Mohamed Hichem , Arab Abdeslem
Published: November 2022

Âge et croissance du Sandre Sander lucioperca (Percidae) dans le réservoir de Ghrib (Nord-Ouest Algérien).

L’objectif de cette étude était de déterminer les paramètres de base spécifiques aux populations nécessaires à l’évaluation des stocks de poissons dans le barrage de Ghrib et de les comparer avec des données provenant d’autres régions. L’âge et la croissance du Sandre, Sander lucioperca (Linnaeus, 1758), ont été étudiés mensuellement de mai 2013 à avril 2014 dans ce barrage algérien, à partir de 849 spécimens. En utilisant la méthode scalimétrique, nous avons pu identifier 9 groupes d’âge dans la population échantillonnée (21 < Lt < 88,2 cm). Les relations taille-poids entre la longueur totale (Lt) et le poids (W) ont été établies pour la masse brute et la masse éviscérée, sexes séparés et sexes confondus, soit dans ce dernier cas : Wt = 0,0033 Lt3,237 (77 ≤ Wt ≤ 7245 g) et We = 0,003 Lt3,271 (59 ≤ We ≤ 6229 g). La taille du poisson au moment de l’apparition des écailles a été estimée à Lt0 = 78,86 mm. Les valeurs moyennes des tailles de poisson obtenues par rétro-calcul à chaque formation des anneaux s’adaptent bien au modèle de croissance de Von Bertalanffy : Lt = 125,72 (l -e-0,13 (t + 1,29)). L’indice de performance de croissance (φ) est de 3,31. Les paramètres de croissance déterminés par la méthode de Bhattacharya s’ajustent bien au modèle de croissance de Von Bertalanffy : Lt = 132,17 (l -e -0,12 (t + 1,69)). Le test χ2 appliqué aux résultats des deux méthodes n’a pas montré de différence significative.
Commentaires sur la flore de l’île Rachgoun (nord-ouest Algérie)
Authors: Véla Errol
Published: November 2022

La parution récente dans la Revue d’Écologie (Terre et Vie) d’une étude consacrée à l’impact des goélands sur la végétation de l’île Rachgoun en Algérie a motivé la publication d’une liste floristique personnelle de l’île datant de 2006 mais demeurée inédite. Pour des raisons méthodologiques, la publication en question fournissait une liste floristique partielle qu’il était utile de compléter ici. Par ailleurs, elle comportait également quelques incertitudes voire erreurs qu’il est apparu important de corriger. Certaines d’entre elles sont dues à la difficulté d’identification avec les flores classiques et/ou le mésusage des index synonymiques récents. D’autres sont dus au non-renseignement des types biologiques sensu Raunkiaer dans ces mêmes flores classiques. Des solutions simples et efficaces pour pallier ces insuffisances chroniques dans le domaine de la botanique maghrébine sont proposées.
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.
Pola Karakteristik NEET (Not In Employment, Education, Or Training) Dan Pengaruh Pengetahuan Pemuda Tentang Program Kartu Prakerja Terhadap Status NEET Di Masa Pandemi
Authors: Febryanna Stephani
Published: November 2022

Indonesia sedang mengalami pertumbuhan penduduk usia produktif, jika mampu memetik dengan baik maka hal ini merupakan bentuk bonus demografi. Akan tetapi pada tahun 2020, angka NEET (Not in Education, Employment, or Training) di Indonesia mengalami kenaikan, padahal di tahun tersebut pemerintah mengeluarkan kebijakan Program Kartu Prakerja dengan sasaran penduduk usia 18 tahun ke atas. NEET terbagi menjadi NEET aktif (berada pada angkatan kerja) dan NEET tidak aktif (bukan angkatan kerja). Proporsi NEET lebih didominasi oleh NEET tidak aktif (bukan angkatan kerja), persentase terbesar berada pada Provinsi Sulawesi Barat dan terendah pada Provinsi DKI Jakarta. Penelitian ini ingin melihat pola karakteristik pemuda NEET dan pengaruh pengetahuan pemuda tentang keberadaan Program Kartu Prakerja. Hasil dari Cluster Analysis dan Classification Analysis dengan Decision Tree, serta regression logistic yaitu pemuda NEET dengan jenis kelamin perempuan, status kawin, pendidikan rendah, tinggal di perdesaan dan tidak mengetahui Program Kartu Prakerja cenderung berada pada NEET tidak aktif.
Pemodelan Regresi Panel Spasial Pengaruh Kebijakan Desentralisasi Fiskal Terhadap Ketimpangan Pendapatan Antarkabupaten/kota di Provinsi Papua Tahun 2015-2020
Authors: Almuazam Reyhan Gesang , Sirait Timbang
Published: November 2022

Perbedaan karakteristik dan sumber daya antarwilayah menyebabkan adanya ketimpangan pendapatan. Demi mewujudkan pemerataan pendapatan, pemerintah Indonesia menerapkan kebijakan desentralisasi fiskal. Provinsi Papua merupakan daerah dengan ketimpangan antardaerah yang tinggi sebab nilai Indeks Williamson Papua yang berada di atas 0,8. Oleh karena itu, penelitian ini bertujuan untuk mengetahui gambaran umum ketimpangan pendapatan antarkabupaten/kota di Provinsi Papua dan menganalisis pengaruh desentralisasi fiskal terhadap ketimpangan pendapatan antarkabupaten/kota di Papua. Metode analisis yang digunakan dalam penelitian ini adalah regresi panel spasial dengan model terpilih Spatial Error Model Random Effect (SEM-RE). Hasil penelitian menunjukan ketimpangan tertinggi terjadi di Kabupaten Mimika, serta daerah dengan ketimpangan pendapatan tinggi mengelompok di sekitar Mimika. Aglomerasi produksi dan IPM berpengaruh signifikan terhadap ketimpangan pendapatan. Sedangkan derajat kemandirian fiskal, dana perimbangan, dan panjang jalan tidak berpengaruh signifikan terhadap ketimpangan pendapatan. Ketimpangan pendapatan suatu kabupaten/kota juga dipengaruhi oleh variabel-variabel lain di luar model dari tetangganya.
Analisis Pembangunan Teknologi Informasi dan Komunikasi di Indonesia Tahun 2015-2020
Authors: Selan Mefi Atalya , Wahyuni Krismanti Tri
Published: November 2022

Teknologi informasi dan komunikasi di Indonesia terus mengalami perkembangan yang ditandai dengan meningkatnya IP-TIK (Indeks Pembangunan Teknologi Informasi dan Komunikasi) sebagai alat ukur perkembangan TIK. Namun, peningkatan antarwilayah di Indonesia tidak merata, sehingga terjadi kesenjangan digital yang secara tidak langsung berdampak terhadap ketimpangan sosial dan ekonomi antarwilayah. Penelitian ini bertujuan untuk mengetahui kondisi TIK dan faktor-faktor yang memengaruhi pembangunan TIK di Indonesia tahun 2015-2020. Metode analisis yang digunakan adalah analisis deskriptif dan analisis inferensia dengan regresi data panel. Hasil penelitian menunjukkan bahwa PDRB per kapita, pengeluaran konsumsi rumah tangga untuk telekomunikasi, dan indeks harga sub kelompok komoditas transportasi, komunikasi dan jasa keuangan signifikan dan berpengaruh terhadap pembangunan TIK di Indonesia. Sementara pengeluaran pemerintah untuk TIK dan pandemi Covid-19 tidak signifikan berpengaruh terhadap perkembangan TIK di Indonesia.
Determinan Risiko Kematian Pasien Covid-19
Authors: Maulana Mochammad Yusuf , Arcana I Made
Published: November 2022

Pandemi Covid-19 di Indonesia pada pertengahan Tahun 2021 menunjukkan adanya peningkatan jumlah penduduk yang terpapar virus corona dan jumlah kematian pasien Covid-19. Kondisi yang relatif sama terjadi juga di Kota Tegal, dimana risiko kematian pada pasien Covid-19 cukup tinggi. Penelitian ini bertujuan untuk mengidentifikasi variabel yang secara signifikan memengaruhi risiko kematian pasien Covid-19, berdasarkan data rekam medis pasien pada periode Januari sampai Agustus 2021 di RSUD Kardinah yang merupakan RS pendidikan dan RS rujukan Covid-19 lini pertama di Kota Tegal. Sejumlah 477 pasien rawat inap Covid-19 menjadi subjek pengamatan dalam penelitian ini. Metode analisis yang diterapkan adalah analisis survival dengan mengimplementasikan model Weibull Proportional Hazard (PH) yang model terbaiknya ditetapkan berdasarkan nilai AIC terkecil. Hasil penelitian menunjukkan bahwa tingkat risiko kematian tertinggi terjadi pada pasien berjenis kelamin perempuan yang sesak nafas, yaitu sebesar 2,9 kali risiko kematian yang dialami pasien perempuan yang tidak sesak nafas.
Forecasting Produksi Kayu Bulat di Indonesia
Authors: Rizqi Aniisa , Palupi Hanif , Novantia Novantia , Wicaksono Bayu Rhamadani , Indrasari RR. Nila
Published: November 2022

SDGs bertujuan mengakhiri kemiskinan dan kelaparan serta mewujudkan pembangunan berkelanjutan selama 15 tahun, baik dalam dimensi sosial, ekonomi, maupun lingkungan. Indonesia dengan iklim tropisnya memiliki hutan produksi yang salah satu komoditasnya adalah kayu bulat. Indonesia berperan penting turut berkontribusi dalam merealisasikan tujuan SDGs, khususnya dalam dimensi ekonomi (Goal 12) dan dimensi lingkungan (Goal 15). Di tahun 2020, implementasi program SDGs terbentur pandemi Covid-19 ditandai terjadinya kontraksi pada pertumbuhan ekonomi Indonesia, namun sektor pertanian, kehutanan, dan perikanan masih mampu tumbuh positif. Saat ini, SDGs sebagai rujukan utama penentuan program dan kebijakan pemerintah di level nasional dan data merupakan kunci utama bagi pemerintah demi tercapainya tujuan kebijakan pembangunan kehutanan berkelanjutan. Namun, belum ada data potensi pertumbuhan produksi kayu bulat di Indonesia sehingga penelitian ini bertujuan untuk forecasting produksi kayu bulat di Indonesia menggunakan ARIMA. Model ARIMA terbaik adalah ARIMA (3,1,1). Hasil peramalan menunjukkan bahwa data 2021Q1-2022Q4 sedikit fluktuatif dengan tren cenderung meningkat.
PENGARUH RASIO KEUANGAN TERHADAP HARGA SAHAM PERUSAHAAN SUBSEKTOR PERTAMBANGAN BATU BARA
Authors: Cahyani Ni Komang Sinta , Hendra Hendra
Published: November 2022

The purpose of this study was to determine the effect of the Current Ratio, Debt to Equity Ratio, Return on Assets, Return on Equity, Net Profit Margin and Operating Profit Margin on stock prices at Coal Mining sub-sector company. The population used in this study are coal mining sub-sector companies listed on the Indonesia Stock Exchange from 2014-2020 and purposive sampling as the sampling method. The sample criteria that meet as many as 8 companies used in this study are from the financial statements of companies in the coal mining sub-sector listed on the Indonesia Stock Exchange. This study uses multiple linear regression method showing that the current ratio, debt to equity ratio, return on equity have an influence on stock prices. Current ratio, debt to equity ratio and roe have a negative effect to stock price because the higher liquidity also means the company have many idle funds. Higher DER and ROE also indicate the company less efficient in their activity.
PENGARUH PENGEMBANGAN KARIR STRATEGI REKRUTMEN SELEKSI DAN TERHADAP KINERJA KARYAWAN PADA PT. X
Authors: Christopher Ruben , Suryawan Ian Nurpatria
Published: November 2022

This research aims to find out the influence of career development, recruitment strategies and selection on employee performance at PT. X. This research design uses quantitative descriptive, using a likert scale divided into five points, as well as secondary data in the form of information obtained from internal companies. Purposive sampling methods with primary and secondary data are used in sample determination. The sample used 119 respondents and data analysis using a double linear regression with IBM SPSS statistic 25 as a test tool. The results of this study show that there is an influence of career development, recruitment strategies and selection on employee performance in PT. X.
Effectiveness of Pay for Performance Incentive System on Projects Performance
Authors: Dewi Ni Wayan Kurnia , Sulastra I Made Dwi Jendra , Putrayasa I Made Agus
Published: November 2022

This study examines the effectiveness of implementing a project performance-based employee incentive system at a state-owned construction company in Indonesia, PT PP (Persero) Tbk. The data were analyzed using a quantitative approach, with the Key Performance Indicator (KPI) for each project before and after the implementation of the project performance-based incentive system. The data was tested using the Wilcoxon test to see if there were statistical differences in project performance before and after the implementation of the project performance-based employee incentive system. The results show that there are statistically significant differences in project KPIs before and after the implementation of the project performance-based employee incentive system. The project KPIs show a higher average value than before the implementation of this system. This research contributes especially for construction companies regarding the pros and cons of implementing a project performance-based incentive system because it is proven to be effective in motivating employees in increasing the average performance of their projects which affect the company's overall performance.
Effect of Long-Term use of N95 Masks on Respiratory Gases, Volumes and Capacities of Medical and Paramedical Personnel: A Pilot Study
Authors: Kumar Saloni Rani , Kumar Dr.  Anuj , Jindal Dr.  Ankush , Singh Dr.  Hargunbir , Beri Adhish , Hundal Gurmehar Singh
Published: November 2022

Background: The spread of coronavirus can be greatly reduced by the usage of face coverings, as corona virus is mainly spread through droplets when people talk, cough or sneeze, and through airborne transmission. N95 respirator mask is a protective device which is used to filter out the airborne particles with a very high efficiency, which is approximately up to 95%. The use of N95 mask in India has increased by a very high proportion due to the on-going coronavirus pandemic.
Objectives: The constant use of N95 respirators by the personnel on duty for about six hours or more may influence the respiratory gases, volumes and capacities.