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The nature reserve of Bec du Feyi near Wibrin has been the object of protection and nature conservation management measures for over 30 years to ensure its perennity. The reserve consists mainly of a mosaic of hay meadows, marshes, ponds, aquatic environments and old clear-cuts in the process of recolonization. The manager shares his thoughts on the evolution of nature through the various environments and habitats that make up this natural site, based on the impact of management actions, but also based on the influence of the numerous factors affecting the local environment and, more broadly, climate change. [ABSTRACT FROM AUTHOR]

Copyright of Naturaliste Canadien is the property of La Societe Provancher and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The article focuses on excursions organized by Nos Oiseaux from May to October 2023, detailing ornithological outings led by various guides across different locations in Switzerland. The topics include sightings of multiple bird species during these excursions, including encounters with diverse bird species such as the Garden Treecreeper, Bonelli's Warbler, and Hawfinch, among others, and observing the behaviors and habitat of these birds in their natural environments.

The article reports that the Echelette Tichodrome is a small, colorful bird that mainly inhabits inaccessible rock faces. Topics include examines due to its living environment, very few studies have been conducted on it and, where applicable, mainly on its habitat and behavior or on the diet of several birds.

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Understanding a species’ current and future potential habitat is crucial to design its policy for management and cultivation practices that are more resilient in the face of climate change. This study assessed the present-day distribution and predicted the potential effect of climate change on the distribution of Anacardium occidentale’s habitat in Togo under two Representative Concentration Pathways (RCP4.5 and RCP8.5) by 2055. Maximum Entropy algorithm, 2538 species occurrence records, and a combination of 23 climate- and soil-related variables were used. Soil, isothermality, temperature seasonality, and annual precipitation are the most significant environmental factors affecting the distribution of the species in Togo. Based on the current model, 54.45% of the Togolese landscape is favourable for cashew development, mainly in the plains of Guinean and Sudanese savannahs. Unfavourable areas (15.20%) are in the southern mountainous areas of Togo and coastal areas. An increase in favourable areas and a slight decrease in unfavourable and moderately favourable areas are predicted by 2055, considering the two scenarios.

Copyright of Biotechnologie, Agronomie, Societe et Environnement is the property of Les Presses Agronomiques de Gembloux and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Résumé: Le concept « Une seule santé », désormais internationalement porté par l'Organisation des Nations unies pour l'alimentation et l'agriculture (FAO), l'Organisation mondiale de la santé animale (OIE), l'Organisation mondiale de la santé (OMS) et le Programme des Nations unies pour l'environnement (PNUE), prend toute sa dimension dans les territoires. Si l'état des milieux et des habitats impacte directement la santé humaine, mais aussi celle des animaux et des plantes, ceci se joue justement dans le fonctionnement et les dynamiques des socio-agro-écosystèmes. Ces territoires constituent aujourd'hui la bonne échelle d'observation, le bon maillage d'analyse mais aussi d'actions, prenant ainsi plus en compte l'importance des citoyens dans les choix et les décisions pour un futur durable. Les auteurs préconisent donc un temps d'expérimentation sous forme de recherches et d'analyses à effectuer sur quelques territoires ciblés, choisis pour leurs caractéristiques propres et les interrogations qu'ils suscitent (forte dégradation du territoire, des espaces et de la biodiversité versus territoire paysagé et diversifié) en termes de risques sanitaires (recrudescence de certaines maladies chroniques ou infectieuses). Ces expérimentations devraient être menées en interdisciplinaire, avec l'ensemble des acteurs locaux, et pourraient s'appuyer sur des observations citoyennes. De telles approches, avec possiblement des cohortes de personnes suivies, devraient porter sur des durées minimales de cinq ans. Elles permettraient de faire émerger des indicateurs « Une seule santé », bases des actions et politiques publiques correctrices, en faveur d'une seule santé. The full importance of the "One health" concept now internationally promoted by the FAO, OIE, WHO, and UNEP is seen in the territories. The state of environments and habitats directly impacts human, animal and plant health, each of which depends on the functioning and dynamics of socio-agro-ecosystems. These territories are ideal for observation, analysis but also for action, thus giving citizens more weight in the choices and decisions for a sustainable future. The authors therefore recommend a period of experimentation in the form of research and analysis to be carried out in a few selected territories, chosen for their specific characteristics and the questions they raise (degradation of territory, habitats and biodiversity versus landscaped and diversified territory) in terms of health risks (emergence of certain chronic or infectious diseases). These experiments should be carried out in interdisciplinary studies involving all the local actors and could be based on citizen observations and cohorts of people followed up for at least five years. The emerging health indicators would serve as bases for corrective public actions and policies, in favor of " One health " for all. [ABSTRACT FROM AUTHOR]

«To protect the world around us and within us is to take care of ourselves. But we need to constitute a ‘we’ that inhabits the common house.» (FT 17). Pope Francis’ insistence on the constitution of a “we” that inhabits the common house questions the conditions of possibility of this consideration of a common dwelling and habitat. Living in common invites us to specify both the renewed perception of an experience of “not being detached” from a relational life where all the elements of the created contribute to this network of vital interdependencies. But also to value this envelopment in a world of which we are a stakeholder, charged with a role at the service of all: to become a host in both senses of the word, to be received and to receive. [ABSTRACT FROM AUTHOR]

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Copyright of Algerian Journal of Arid Environment (AJAE) is the property of University of Kasdi Merbah Ouargla and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Études Caribéennes is the property of Etudes Caribeennes and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Five nocturnal lemur species, including Avahi laniger, Daubentonia madagascariensis, Cheirogaleus major, Lepilemur mustelinus, and Microcebus lehilahytsara, which are all clas sified as threatened, are present within Mangabe Reserve. This study aims to understand their habitat use (ecology) and their behaviors. The habitat used (substrate size, forest cover, microhabitats, tree size according to the CBH and height of the animal above the ground) by lemurs was studied within a 100m2 plot where the animals were found along the transect (1000m). The animals' behavior were recorded during 30 minutes to an hour of animal survey. 58.6 % of A. laniger, M. lehilahytsara, C. major and L. mustelinus were frequently observed and living inside the forest. Their habitats vary according to the species: M. lehilahytsara frequents small supports, using a substrate between 0.5 to 5 meters above the ground (level 1); L. mustelinus prefer large and medium supports, occurring on level 2 substrate; C. major can be seen on large supports, approximating level 4 substrate and A. laniger use large supports on level 2 substrates. These species of nocturnal lemurs generally use all parts of the vegetative systems of the tree; the animal is found either inside or at the periphery of the tuft such that: A. laniger and L. mustelinus select the trunks at rest and during movement; C. major and M. lehilahytsara frequently localized on branches during food intake. Four types of behavior and reactions towards humans were marked during the study; their activities are: resting, moving, grooming and feeding. The duration of the common "rest" activity varies from 20 - 29 minutes for these four species. These lemurs have been placed in higher threat categories due to increased human pressure (Tavy) in the Protected Area. These assemblages are closely related to undisturbed forests, even those adapted to open areas, and the restoration of their forest habitats will be recommended for their survival. [ABSTRACT FROM AUTHOR]

In order to monitor the lemur population trends at the New Protected Area (NAP) Antrema, located in the northwestern of Madagascar, an inventory of lemur species present in the site was performed. Our study was carried out in the NAP of Antrema, from February 1st to March 14th, 2020. Diurnal and nocturnal surveys were carried out in eight different forest fragments in Antrema, Kapahazo, Ampampamena, Antsoherimasiba, Ambato, Antsahelika, Ambanjabe, Ankoririka and Bako. In addition, villager surveys (n=39) were carried out in order to bring more information on lemurs and their habitat. In total, six species of lemurs have been recorded, including Cheirogaleus medius, a species newly recorded for this area. The majority of people surveyed (n=38), did not know about the existence of C.medius in the NAP. However, one person interviewed in Ambanjabe reported that he had seen an individual similar to C. medius. Thus, NAP Antrema hosts six species of lemurs: Eulemur mongoz, Eulemur rufus, Propithecus coronatus, Cheirogaleus medius, Microcebus murinus and Lepilemur aeeclis, the latter three being nocturnal species. The occurrence of Cheirogaleus medius in the NAP Antrema is reported here, for the first time. [ABSTRACT FROM AUTHOR]

Copyright of Études Inuit Studies is the property of Centre interuniversitaire d'etudes et de recherches autochtones (CIERA) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Algerian Journal of Arid Environment (AJAE) is the property of University of Kasdi Merbah Ouargla and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Pour se protéger des crues en montagne, les hommes ont transformé et artificialisé les cours d’eau, avec comme conséquence une perte en surface d’habitats pour la biodiversité. Ainsi, les populations de petite massette (Typha minima Hoppe), plante des berges des cours d’eau, ont régressé de 85 % en un siècle dans les Alpes ! Aujourd’hui, la législation est plus attentive à la préservation de la biodiversité dans le cadre de projets d’aménagement et elle rend obligatoire un certain nombre de mesures permettant de compenser les impacts sur les écosystèmes. Pour les aménageurs du territoire, la restauration de populations de T. minima pose cependant des questions auxquelles cet article apporte des éléments de réponses.

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Lorsqu'on parle de l'espèce Hapalemur griseus, c'est le Parc National de Ranomafana qui est considéré comme un site de référence. L'étude sur l'utilisation verticale de l'habitat par Hapalemur g. griseus a été effectuée dans la forêt humide tropicale de Maromizaha pendant la saison humide et sèche en 2016. Hapalemur g. griseus, un lémurien folivore, se trouve dans cette forêt mais les informations scientifiques sur ce taxon restent méconnues, notamment sur cette utilisation verticale et les facteurs qui peuvent l'influencer, voire les enjeux environnementaux qui peuvent également modifier l'habitat de l'animal. A cet effet, la présente étude a fait l'objet d'identifier les facteurs bioécologiques dans l'utilisation verticale de l'habitat d'Hapalemur g. griseus. Des données sur cette utilisation ont été obtenues par la méthode de l'observation focal. En effet, Hapalemur g. griseus occupe toutes les strates forestières disponibles de son habitat (basses, moyennes et supérieures), mais avec différentes fréquences. Quand l'animal occupe la strate basse (0.1-3m), il récupère les pousses, les jeunes feuilles de bambou et les jeunes feuilles d'autres plantes ainsi qu'il se repose dans un endroit sécurisé. Pour les autres strates, l'animal l'utilise pour surveiller leur environnement. Dans cette utilisation de l'habitat verticale, la hauteur d'Hapalemur g. griseus, dépend de la hauteur des arbres utilisés comme support (Rs=0.712; P<0.0001). En outre, Hapalemur g. griseus exploite les supports de deux façons pour récupérer les aliments. Pour la première méthode, il se nourrit sur un support, l'animal récupère les feuilles du bambou sur cette même plante (Cephalostachyum sp), il exploite les fruits de Canthium sp les feuilles et les fruits de Ficus sorocoides et de Ficus reflexa sur ce même arbre. Pour la deuxième méthode, l'animal collecte son aliment en s'appuyant sur un autre support. Dans l'organisation sociale d'Hapalemur g. griseus, l'animal se regroupe pendant leur activité et parfois il se disperse. Il y a une distance du voisin moyenne minimale et maximale par rapport à l'animal focal qui est respectivement 1.3m±0.0m et 3.21m±0.0m (n=1039). En cas de perturbation, il lance un cri d'alerte pour avertir les autres membres. Hapalemur g. griseus est considérablement vigilant en adoptant une stratégie adéquate pour sa structure sociale. En conclusion, dans l'utilisation verticale de l'habitat par Hapalemur g. griseus, les facteurs déterminants de cette utilisation sont la disponibilité des ressources notamment la hauteur des arbres utilisés comme support, la luminosité, la saisonnalité, le sexe ainsi que les comportements. [ABSTRACT FROM AUTHOR]

La reciente edición en línea del Atlas digital de Flora vascular de los Pirineos permite analizar algunos patrones de la distribución y las preferencias ambientales de las plantas más raras, con el fin de contribuir a la caracterización de la rareza y al diseño de estrategias de conservación de la diversidad florística en la cordillera. Entre los 363 taxones seleccionados por su escasa representación (el 10% del total de la flora) 352 se distribuyen en menos del 2% del territorio y 11 ocupan un área inferior al 4%, pero tienen menos de 30 de poblaciones en todo el territorio. La flora rara se distribuye en el 65% de los Pirineos (utilizando para esta estima una malla de cuadrículas UTM de 10 Km de lado), y las regiones con más abundancia de plantas raras coinciden con las que tienen mayor diversidad florística total. Las zonas con mayor densidad de plantas raras se sitúan en el extremo oriental (junto al Cap de Creus), el noroccidental (entre San Sebastián e Irún) y en el centro del Parc National des Pyrénées y los alrededores de Monte Perdido. La flora rara se muestra significativamente diferente del conjunto de la flora en su representación taxonómica, distribución y amplitud altitudinal, corología, formas biológicas, preferencia edáfica y hábitats, pero no en el grado de naturalidad de los hábitats.

A number of 54 mammal species were identified from the two studied areas (Buzău and Teleajen Valleys), 40 species being common in both sites. Eleven species were recorded only in the Buzău Valley and in addition other three species only in the Teleajen Valley. Information about the home range as well as about the approximately density is given for most of the presented species

The Great Grey Shrike, Lanius excubitor, is a charismatic bird species that rarely leaves indifferent those that have the luck to observe it. Today, Wallonia has the privilege of hosting one of the very last viable breeding populations of this species in Western Europe. Fig. 92 shows that this Walloon breeding nucleus is at present almost isolated between the ones of the Massif Central in France and of Central Germany. The current study, which is based on field work carried out in 2016, starts by providing a new estimate for the Walloon breeding population (110-150 breeding pairs). After providing an analysis of the range of occupied habitats and the specific population dynamics of the species, the study recommends a series of conservation measures aimed at maintaining the species in Wallonia. Due to the extent of its habitat requirements, the Great Grey Shrike can be considered as a bio-indicator of prime interest. Its presence is always indicative of a high-quality environment. Taking into account these requirements will therefore ensure the co-existence of the vast range of habitats and micro-habitats, and hence contribute to the maintenance of biodiversity. Today, Wallonia has a special European responsibility for this species. The future will teach us whether we have been able to preserve this important natural heritage. [ABSTRACT FROM AUTHOR]

Copyright of Recherches Sociographiques is the property of Recherches Sociographiques and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Review: larval ecology of Culicoides biting midges (Diptera: Ceratopogonidae). This paper reviews the larval ecology of Culicoides Latreille (Diptera: Ceratopogonidae) in order to bring together knowledge, often very scattered, of breeding sites currently identified worldwide for the main species of Culicoides biting midges. These bloodsucking midges are involved in the transmission to animals of various parasites (protozoa and filarial worms) and viruses. Larval development of Culicoides is usually better in moist substrates rich in organic matter. Each species, however, has its own ecological requirements and therefore has its own specific microhabitat. In this review breeding sites are divided into aquatic and semi-aquatic freshwater substrates, salt or brackish water substrates, terrestrial substrates and anthropic substrates linked to breeding activity. The larval habitats of many species of the genus Culicoides, however, remain undiscovered. Knowledge of breeding sites and their characterization are essential in order to allow the development of effective control strategies against these vector insects, thus allowing the strengthening of livestock vaccination programs and other control methods. The study of currently identified breeding sites could help in guiding the direction of future ecological research investigations and in developing proposals to control these vector midges.

The Multicolored Asian ladybeetle, Harmonia axyridis (Pallas), native to Asia, is an invasive species in many European and American countries. Initially introduced as a biological control agent against aphids and coccids in greenhouses, this alien species rapidly invaded many habitats such as forests, meadows, wetlands, and agricultural crops. This paper reviews the habitats (forests, crops, herbs, gardens and orchards) where H. axyridis has been observed, either during insect samplings or as part of Integrated Pest Management (IPM) programs. Studies have referenced H. axyridis on 106 plant taxa (35 arboreal species, 21 crop species, 27 herbaceous species, 11 ornamental species, and 12 orchard species) and have identified 89 plant-prey relationships (34 arboreal species, 16 crop species, 13 herbaceous species, 10 ornamental species, and 16 orchard species) in different countries. Harmonia axyridis is more abundant in forest areas, principally on Acer, Salix, Tilia and Quercus, than in agroecosystems. Some plant species, such as Urtica dioica L., which surround crops, contain large numbers of H. axyridis and could constitute important reserves of this alien species in advance of aphid invasions into crops. This review highlights the polyphagy and eurytopic aspect of H. axyridis.

Connaître la distribution des espèces vectrices de zoonoses est fondamentale pour comprendre les dynamiques épidémiologiques et caractériser les zones à risque. Cette distribution peut être appréhendée à différentes échelles : régionalement, l'aire de répartition de ces espèces définit les limites d'occurrence de la transmission d'agents pathogènes et, localement, leurs niches déterminent l'aléa. Cette dernière échelle requiert une connaissance très précise des milieux qui peut être acquise par l'analyse d'images satellite à très haute résolution spatiale. Dans le cadre d'un projet de recherche sur la leptospirose à La Réunion (LeptOI), cette étude propose de mesurer le potentiel d'utilisation d'une image Pléiades (pixels de 50 cm) pour caractériser la distribution locale de différents petits mammifères terrestres autour de l'Etang de Saint-Paul. Trois campagnes de piégeage ont permis la capture de 134 animaux appartenant à quatre des cinq espèces présentes à La Réunion (Rattus rattus, R. norvegicus, Suncus murinus et Tenrec ecaudatus). Une analyse orientée-objet de l'image Pléiades a permis de discriminer dix classes d'occupation des sols avec une précision totale de 83,6%. Des indices paysagers ont été calculés à partir de cette classification autour de chacun des pièges (distances les plus courtes aux classes d'occupation, densité de contours et pourcentages de surface des classes au sein de zones tampon de 50 et de 100 mètres). Trois zones (« humide », « anthropisée » et « sèche ») sont clairement discriminées par ces variables, qui pourront être utilisées comme déterminants écologiques de différents profils épidémiologiques : la zone humide étant propice à la leptospirose et la zone anthropisée étant un lieu de co-occurrence des quatre espèces et ainsi potentiellement une zone d'échanges de pathogènes.

This article proposes an updating of information available on historical geography, tribal society and the manifestations of the various levels of power in the Petite Kabylie in the Middle Ages, building upon an account of a journey left by al-Idrīsī, an Arab geographer of the 6th/12th century. Based additionally on a thorough sifting of Arab sources for the mediaeval Maghrib and of the modern literature, this article explores the areas of research dealing with fortifications, habitats and modes of settlement. Starting from examples of land use and settlement from late Antiquity, in some cases contrasting autochthonous social structures (tribes, mountain settlements, etc.) with Roman concepts of land development, we conclude, among other things, that an examination of such issues can only produce satisfactory results if archaeological methods and the specific characteristics of the Maghrib are systematically taken into account.

A l'interface entre terre et mer, les zones humides littorales sont des environnements dont le fonctionnement écosystémique est contraint par les forçages climatiques et anthropiques. Par le biais des directives européennes et des plans de gestion, ces milieux sont suivis et cartographiés à échéance régulière dans le but d'asseoir leur état écologique. Différentes stratégies de cartographie basées sur l'exploitation d'images satellite sont adoptées selon les objectifs à atteindre : (1) cartographie exhaustive des faciès/habitats intertidaux (type Natura 2000), (2) cartographie de l'herbier à Zostera noltii (Directive Cadre sur l'Eau), (3) cartographie des habitats des prés-salés, (4) suivi de l'évolution naturelle des paysages et de la végétation en lien avec des événements accidentels ou volontaires (actions de dépoldérisation). Cet article dresse un panorama des stratégies de cartographie exploitant des données optiques et radar à Haute (SPOT-5) et Très Haute Résolution Spatiale (Pléiades, TerraSAR-X) mises au point pour répondre aux besoins d'observation et d'expertise pour la gestion intégrée des milieux littoraux lagunaires.

Muchos parajes del Suroeste de la Galia presentaron ánforas que, muy a menudo, fueron reutilazadas con divesos fines. Estas diferentes reutilizaciones pueden estar clasificadas en varios ámbitos: vida cotidiana, consturcción y canalización, pero también ritos religiosos.

Knowing the distribution of vectors of zoonoses is fundamental to understand epidemiological dynamics and characterize risk areas. This distribution can be assessed at different scales: regionally, the range of these species defines the limits of occurrence of pathogen transmission and, locally, niches determine the hazard. This latter scale requires a very precise knowledge of the areas that can be gained through the analysis of very high spatial resolution satellite images. As part of a research project on leptospirosis in La Réunion (LeptOI), this study proposes to measure the potential of a Pleiades image (product resampled to to 50 cm) to characterize the local distribution of various small terrestrial mammals in Saint-Paul swamp area. Three trapping campaigns have led to the capture of 134 animals belonging to four of the five species occurring in Reunion Island (Rattus rattus, R. norvegicus, Suncus murinus and Tenrec ecaudatus). An objectbased image analysis of the Pleiades image allowed discriminating ten land use classes with a total accuracy of 83.6%. Landscape indices were calculated from the classification around each trap (shortest distances to each land use class, edge densities and proportion of each patch within buffers defined by a 50 meters or a 100 meters radius). Three areas ("wet", "urbanized" and "dry") are clearly discriminated by these variables, which can be used as ecological determinants of different epidemiological profiles. The wetland area is known as suitable to leptospirosis whereas the urbanized area is a place of co-occurrence of the four species and thus potentially favorable to the exchange of pathogens. [ABSTRACT FROM AUTHOR]

A l'interface entre terre et mer, les zones humides littorales sont des environnements dont le fonctionnement écosystémique est contraint par les forçages climatiques et anthropiques. Par le biais des directives européennes et des plans de gestion, ces milieux sont suivis et cartographiés à échéance régulière dans le but d'asseoir leur état écologique. Différentes stratégies de cartographie basées sur l'exploitation d'images satellite sont adoptées selon les objectifs à atteindre : (1) cartographie exhaustive des faciès/habitats intertidaux (type Natura 2000), (2) cartographie de l'herbier à Zostera noltii (Directive Cadre sur l'Eau), (3) cartographie des habitats des prés-salés, (4) suivi de l'évolution naturelle des paysages et de la végétation en lien avec des événements accidentels ou volontaires (actions de dépoldérisation). Cet article dresse un panorama des stratégies de cartographie exploitant des données optiques et radar à Haute (SPOT-5) et Très Haute Résolution Spatiale (Pléiades, TerraSAR-X) mises au point pour répondre aux besoins d'observation et d'expertise pour la gestion intégrée des milieux littoraux lagunaires. [ABSTRACT FROM AUTHOR]

Résumé: Afin d’accroître le pool génétique nécessaire à l’amélioration variétale du cerfeuil tubéreux, apiacée alimentaire en pleine expansion, des prospections de populations sauvages sur deux campagnes successives ont été réalisées dans les bassins du Rhin et de la Weser, en Allemagne. Ces populations, principalement ripariennes, sont susceptibles d’être façonnées par les évolutions des réseaux hydrographiques qui caractérisent leur biotope. L’étude moléculaire de la diversité génétique des populations montre une structuration forte entre ces populations sauvages (G ST ∼32 %), mais ne met pas en évidence d’effet structurant des réseaux hydrographiques sur cette diversité, ni de phénomène d’érosion génétique global. Une discussion sur la stratégie de maintien de la diversité de cette espèce à long terme est proposée. [ABSTRACT FROM AUTHOR]

Deal with the dual economic and social crisis in the 1980s, many of the Third World farming communities have been able to develop agro-pastoral systems and forestry in order to stamp rural poverty. The case study of Batoufam situated in the western highlands of Cameroon is an edifying illustration. Studies based on surveys and remote sensing data show a dynamic that leads to a gallery forest snacking, isolated groves and alpine meadows in favor of the habitat, communication channels and farms. Despite the increased rate of afforestation in the soils of the range 30, the future of these residual plant formations remains concerned because of population growth and anthropogenic pressures on the lands. [ABSTRACT FROM AUTHOR]

Copyright of VertigO is the property of La Revue Electronique en Sciences de l'Environnement VertigO and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Description and illustration of a new Kotlabaea species, K. benkertii, characterized by its asci, paraphises, habitat and development time. [ABSTRACT FROM AUTHOR]

Abstract: The phytoecological study of the alder forests of north-east Algeria shows that these habitats with boreal affinities harbour very high species richness (>400 species) and complex structures, which suggest their ancient origin. They correspond phytosociologically to two syntaxa, the Campanulo alatae-Alnenion glutinosae (riparian alder forests) and the Rusco hypophylli-Alnetum glutinosae (peat-forming alder carrs), respectively. Their degraded state and their regressive dynamics, observed during the 14 years of the study, reveal their precarious situation and their rapid ongoing decline under the influence of human-induced uncontroled disturbances (cutting, burning, draining, dumping…). With regard to their ecological, historical and patrimonial importance, the alder forests of Algerian Numidia should be urgently protected, with the aim of assuring the perennity of their exceptional floristic corteges. [ABSTRACT FROM AUTHOR]

Copyright of VertigO is the property of La Revue Electronique en Sciences de l'Environnement VertigO and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)