bluuebunny/crossref_metadata_2025_split huggingface dataset:
Structure des peuplements ligneux dans les plantations d’Acacia senegal (L.) Willd dans la zone de Dahra (Ferlo, Sénégal)
Authors: Diallo Aly , Ngom Faye Madiara , Guisse Aliou 
Published: November 2022

Woody stand structure in plantations of Acacia senegal (L.) Willd in Dahra area (Ferlo, Senegal).

The present study gives an up-to-date inventory of natural woody stands in plantations of Acacia senegal (L.) Willd in Ferlo. It aims at determining the structure, specific composition and regeneration of woody stands in plantations of Acacia senegal. Four sites were retained for study : Acacia senegal plantations Ndodj 2001, Isra 1999, Boulal 2004 and Déali 2005, distributed along an increasing pluviometric gradient, with different topographic characteristics and protection status. Woody stands were characterized by dendrometric measurements. Woody plants belong to 12 species representing 10 genera and 7 families. The very high mortality rate observed on dunes would be linked to poor water availability. Regeneration appeared significant in hollows (Isra), especially concerning Boscia senegalensis (Pers.) Lam and Balanites aegyptiaca (L.) Del. It was also relatively important at Boulal where livestock is rather infrequent, as in Isra. On the other hand in Déali, regeneration was important at the top of the dunes with Calotropis procera Ait. and weak in hollows, areas frequented by the cattle. Compared to Ndodj, Boulal was characterized by a relatively high regeneration. This situation could be explained by the fact that Isra and Boulal are more protected than Déali which is much attended by the cattle. In Ndodj, we noted that plants are subject to attacks by termites what explains the high mortality rates observed in this site. Balanites aegyptiaca, Boscia senegalensis and Calotropis procera are at the origin of the increase of the number of individuals in the stand, whereas Acacia senegal shows a weak regeneration. This weak regeneration of Acacia senegal would be linked to the systematic gathering and collecting of fruits, abundantly used to feed domestic animals, but also at certain places to stripping and repetitive bleedings. As far as plant circumference and height are concerned, the observed distribution was unimodal for the shrub layer, except in hollows at Isra where it was bimodal in the shrubby as well as the arborescent layers. Field observations and obtained results show that floristic variability was more marked at Isra than at Déali (strong pressure of the cattle). The structure of the
woody stand appeared strongly dependent on topography, moisture gradient and anthropic pressure.
Distribution spatio-temporelle des Myriapodes dans un site anthropisé et un site naturel du Nord-Est de l'Algérie
Authors: Houd-Chaker Kahina , Maamcha Ouided , Daas Tarek , Benamara Amel , Scaps Patrick 
Published: November 2022

Les Chilopodes et les Diplopodes présents au niveau de deux sites localisés dans le nord-est de l’Algérie (site anthropisé d’Annaba et site naturel d’El Tarf) ont été étudiés par piégeage durant une année (juin 2006 à mai 2007). Au total 901 Chilopodes et 411 Diplopodes ont été récoltés. Les diversités spatiotemporelles des deux taxons ont été évaluées. Nos résultats suggèrent que les paramètres physico-chimiques édaphiques tels que le taux de limon, le pourcentage de matière organique ou le pH mais aussi les paramètres
climatiques tels que le volume de précipitation et le taux d’hygrométrie qui en résulte ont une influence significative sur l’abondance et la répartition spatiale des Chilopodes et des Diplopodes avec une nette différence
de comportement entre les deux taxons. L’estimation de l’intensité des perturbations introduites par l’homme
influençant la diversité écologique des deux taxons indique que la région d’Annaba, qui est plus anthropisée que
celle d’El Tarf, subit une perte en matière de diversité concernant à la fois les Chilopodes et les Diplopodes.
Spatio-temporal variations in allocation of macronutrients in Smilax excelsa L. (Liliaceae)
Authors: Korkmaz Hasan , Alkan Safinaz , Mumcu Ümmügülsüm 
Published: November 2022

Variations spatio-temporelles de l’allocation des macronutriments chez Smilax excelsa
L. (Liliaceae).

L’allocation des nutriments (N, P et K) dans la liane Smilax excelsa a été étudiée dans divers habitats au long de la saison de croissance. Les concentrations de macronutriments (à l’exception de la concentration en K foliaire) différaient de manière significative selon la saison. De même, des différences significatives des concentrations ont également été observées entre les stations échantillonnées, sauf pour N des tiges et rhizomes et K des rhizomes. Les concentrations de macronutriments du sol différaient significativement selon les stations mais pas selon les saisons. Les S. excelsa des canopées ouvertes et celles en position émergente allouaient davantage de macronutriments aux fruits que celles des canopées fermées ou en position de surcimées.
Analyse des phytocénoses des systèmes insulaires des régions de Béjaia et de Jijel (Algérie) en présence du Goéland leucophée (Larus michahellis)
Authors: Benhamiche-Hanifi Samira , Moulaï Riadh 
Published: November 2022

Analysis of plant communities in the presence of Yellow-legged Gull (Larus michahellis)
on the islands along Béjaia and Jijel coasts (Algeria).

Phytocenoses were studied on the islands along Béjaia and Jijel coasts, in the presence of the Yellow-legged Gull, a major disturbance factor. Floristic inventories obtained were qualitatively analysed in terms of floristic richness (families, number of taxa), floristic similarity between islands, endemism, biological type, mode of dissemination and adaptive strategy of Grime. Results show that the total number of taxa is156 and that Petit Cavallo Island, where plant cover is very similar to that of Grand Cavallo Island (60.1 %), is the richest in species (101 species). Therophyts and hemicryptophyts taxa (38.5 % and 28.2 %) characterize the six islands. The pervasive presence of gulls (Larus michahellis) affects the dissemination of diaspores, where vegetation zoochory (39.1 %) with a clear appearance of non-native plants of often heterogeneous origin. The vegetation change is towards a ruderal pole (67.9 % of ruderal s. l.) under the effect of disturbances.
Caractérisation écologique de l’habitat naturel du Sulla (Fabaceae) dans le Nord-Est de l’Algérie
Authors: Issolah Rachida , Tahar Ali , Derbal Nora , Zidoun Farouk , Zine Ait Meziane Mohand , Oussadi Araab , Dehiles Idir , Bradai Rachid , Ailane Mustapha , Terki Nassima , Aziez Fatiha , Zouahra Ali , Djellal Leila 
Published: November 2022

Ecological characterization of the natural habitat of Sulla (Fabaceae) in Northeastern
Algeria.

As part of the evaluation and enhancement of plant genetic resources of fodder and pastoral interest in Algeria, a study of the ecological characterization of the natural habitat of Sulla coronaria (L.) Medik. (Syn. Hedysarum coronarium L., Fabaceae) was carried out in Northeastern Algeria. Following a collecting mission, 36 sites of Sulla were randomly selected. In each site, three soil samples were randomly collected. Sixteen soil parameters (soil pH, electrical conductivity, total limestone, total nitrogen, potassium, phosphorus, carbon, organic matter, the C/N ratio and particle composition) were analysed. Two factors related to topography (altitude) and climate (rainfall) of the natural habitat of S. coronaria were also considered. Variance analyses (univariate and multivariate) showed a high variation of the physical and chemical characteristics between the different sites. The pH varies between 8.1 and 8.94. In most cases, soils were characterized by a clayey texture, but the species may also adapt to other types of texture (clayey loam, silty clay loam, silty clay, silty). Cluster analysis highlighted five groups of sites. The altitude and rainfall seem to play a prominent part in the formation of these groups. Relations have also been found between certain characteristics of the soil and between altitude and rainfall in the natural habitat of the species. The effect of altitude seems to be more pronounced. This study will contribute to valorize and develop S. coronaria in the marginal, isolated and deprived areas where fertilizers are not economically advisable.
Bees and plants in a transition area between Atlantic rain forest and Araucaria forest in Southern Brazil
Authors: Dubet da Silva Mouga Denise Monique , Furta do Noble Caroline , Goudard Bussmann Daniela Beatriz , Krug Cristiane 
Published: November 2022

Abeilles et plantes dans une zone de transition entre la forêt pluviale atlantique et la forêt
à Araucaria dans le sud du Brésil.

La communauté d’abeilles indigènes d’une zone de transition entre la forêt pluviale atlantique et la forêt à Araucaria, à Joinville, état de Santa Catarina, Brésil, a été étudiée en ce qui concerne la richesse en espèces, l’abondance relative, les ressources florales et les interactions avec les plantes. Les observations ont été effectuées mensuellement de 2008 à 2009, en utilisant des filets entomologiques. Ont été échantillonnés 710 individus de 88 espèces des cinq sous-familles d’abeilles existant au Brésil. Les abeilles ont été prélevées sur 62 espèces de plantes de 29 familles. Les familles végétales les plus visitées ont été les Asteraceae (48 %), Lamiaceae (10 %), Saxifragaceae (9 %) et Rosaceae (8 %). La sousfamille d’abeilles présentant la plus grande diversité d’espèces a été celle des Halictinae (44 %), suivie par
les Apinae (38 %), Andreninae (11 %), Megachilinae (8 %) et Colletinae (1 %). La séquence en abondance d’individus, par sous-familles, a été : Apinae (81 %), Halictinae (12 %), Andreninae et Megachilinae (les deux 3 %) et Colletinae (moins de 1 %). Apis mellifera L. est l’espèce la plus abondante (42 %), suivie par Trigona spinipes (Fabricius) (14 %) et Plebeia sp. L’étude dépeint un système avec des interactions asymétriques, démontré par le groupement des espèces, avec une prédominance de relations générales, révélant l’importance relative de l’abondance pour l’imbrication des réseaux mutuels. Les mensurations de réseau évaluées dévoilent un lacis robuste et diversifié, un trait récurrent dans la structuration de la biodiversité.
Dix années de suivi des anatidés nicheurs sur le lac de Sidi Boughaba (Nord-ouest Marocain) : Situation, tendances d’évolution et perspectives de recherche
Authors: Cherkaoui Imad , Dakki Mohamed , Lahrouz Saïd , Hanane Saâd 
Published: November 2022

Ten-year survey of breeding Anatidae of Lake Sidi Boughaba (North-western Marocco) : status, tendencies of change and avenues for future research.
A ten years survey of duck species was carried out in the Ramsar site and Important Bird Area (IBA) of Sidi Boughaba. No such survey has ever been conducted before in Morocco to study the change in number of breeding duck species in the country. Overall results have shown the appearance of new breeding species in the site : Red-crested Pochard (Netta rufina), Common Pochard (Aythya ferina) and White-Headed Duck (Oxyura leucocephala). Other species have become more regular like Gadwall (Anas strepera) and Ferruginous Duck (Aythya nyroca) while the vulnerable Marbled Teal (Marmaronetta angustirostris) and the Mallard (Anas platyrhynchos) continue to breed in this wetland with numbers that remain stable though the numbers of females with ducklings are decreasing in these two species. The number of breeding ducks species in this wetland is the highest in Morocco and in the Maghreb. The overall results showed that the numbers of Gadwall, Red-crested Pochard, Common Pochard and Ferruginous Duck are markedly increasing following the same expansion patterns at both regional and Mediterranean levels. The initiation of similar researches on other wetlands is essential to assess the abundance of duck populations and indicate trends of this breeding waterfowl group at larger scales.
Impact de l’introduction d’Alburnus alburnus (Linnaeus, 1759) sur l’espèce autochtone Barbus setivimensis (Valenciennes, 1842) (poissons cyprinidés) dans le lac de barrage de Keddara (Algérie)
Authors: Attou Fouzia , Arab Abdeslem 
Published: November 2022

Impact of the introduced Alburnus alburnus (Linnaeus, 1759) on the autochthonous Barbus setivimensis (Valenciennes, 1842) (Cyprinidae) in Keddara dam (Algeria).
This paper is an attempt to describe the impact of the accidental introduction of Alburnus alburnus (Linnaeus, 1759), an exotic cyprinid fish, on the autochthonous species Barbus setivimensis (Valenciennes, 1842) in Keddara dam through monthly sampling during six years, from June 2006 to August 2011. Variance analysis allows concluding to a significant variation during the period of study. Tuckey’s test contrasts the means for 2006 and 2007 to those of the others years. Captures of Barbus setivimensis clearly decreased, whereas the bleak increased, particularly during the reproduction period. The reduction in Barbus setivimensis numbers cannot be related to the water physico-chemical quality in Keddara dam. The success of the invasion of Alburnus alburnus is conditioned by the favourable characteristics of the habitat. We can conclude that there are a strong competition/predation effect especially for the trophic resources between the two species.
Feeding activity and space use of a naturalized population of Monk Parakeet, Myiopsitta monachus, in a Mediterranean urban area
Authors: Di Santo Marianna , Vignoli Leonardo , Battisti Corrado , Bologna Marco A. 
Published: November 2022

We studied a naturalized population of monk parakeet breeding in an urban park in Rome,
by collecting data on the diurnal and feeding activity, space use (e. g, roosting preferences, flight height) and
behavioural traits (e. g., cluster size). Consideration on the potential ecological impact of the species is also made. The diurnal activity of parakeets did not differ between morning and afternoon. Most individuals
were observed in flight 6-10 m from the ground, and when at roost, parakeets preferred perch es higher than 5 m. The clusters sighted on ground were significantly larger in size than those observed on roosts, while cluster size was not linked to flight height. For this species, the observed roost preference indicates that the
availability of perches on high trees seems to be an important factor for habitat selection : standing on trees may increase the chances to identify trophic resources, reduce the risk of predation when at rest, and prevent overheating from high summer temperatures during the day. Regarding to feeding habits, at our study site the monk parakeet fed on different plant species both on the trees and at the ground level (e. g., Fabaceae, Ulmaceae, Poaceae, Rosaceae), showing a clear preference towards some plant species, irrespective to their abundance, and with Scolymus hispanicus (Asteraceae) as the most exploited species by far.
Intérêt des Characeae comme bioindicateurs de la qualité des eaux : le cas des zones humides de Numidie (Nord-Est algérien)
Authors: Zouaïdia Hanene , Bélair Gérard de , Benslama Mohamed , Soulie-Marsche Ingeborg , Muller Serge 
Published: November 2022

Interest of the Characeae as bioindicators of water quality : the case of wetlands in Numidia (NE Algeria).
Characeae surveys and water physico-chemical studies have been performed during four years (2007-2011) on 41 wetlands of Numidia (NE Algeria). Among the 12 species inventoried in the region, four are rare in North Africa and one, Nitella batrachosperma, is new for Algeria. Comparison between Characeae communities and phosphate contents shows that (1) Characeae have nearly disappeared from habitats that contain high levels of orthophosphates (> 780 μg. l-1), (2) three species of Chara (C. globularis, C. gymnophylla and C. vulgaris) characterize medium-polluted habitats (213-780 μg. l-1), where they are often present as discontinuous populations, and (3) the Nitella (N. opaca and N. translucens) are good indicators of low water pollution (< 70 μg. l-1). In addition to the sole presence of a given species, the physiological appearance of the plants has to be taken into consideration as a sign of a healthy population.
Allocation de carbone des peuplements de Cyperus papyrus L. (Cyperaceae) dans les zones humides forestières : cas de la zone urbaine et péri-urbaine de Yaoundé (Cameroun)
Authors: Dieudonné Kono Léon , Mbarga Bindzi Marie-Alain , Angoni Hyacinthe , Hortense Biye Elvire , Endanga David Guy Hervé 
Published: November 2022

Carbon allocation of stands of Cyperus papyrus L. (Cyperaceae) in forested wetlands : the case of urban and peri-urban areas in Yaoundé (Cameroon).
Carbon allocation of various populations of C. papyrus was investigated in and around Yaoundé urban area, in order to recommend the sustainable management strategies for this species. The transect method was adopted for data collection in seven selected sites from two types of microhabitats : borders (BOR) and permanently wet (ZPH) areas where C. papyrus is found. The data collection focused on above-and below-ground biomass, litter and soil obtained from 0-30 and 30-60 cm depth. The dry matter (MS) obtained after drying the biomass and litter in an oven was converted to carbon. Most of the carbon was stored in the soil and underground compartment of the Retention Pond 1 and 2 in the urban area. In other sites, the soil is the only main compartment to sequester carbon ; with more than 96 % in both BOR and ZPH. The highest stock of carbon is obtained in the urban area (114.80 T. ha-1 to 341.50 T. ha-1) but reduces at its periphery (109.15 T. ha-1 to 227.90 T. ha-1) when C. papyrus populations is destroyed by man for agricultural activities. The main factors influencing carbon stocks in sequestering compartments include the density and stems diameter on one hand, then the weight of carbon content and pH on the other hand.
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.
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.