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301	Anatomy of a pin-up : a genealogy of sexualized femininity since the Industrial Age Lipsos, Eleni January 2013 (has links) Pin-up images have played an important role in American culture, in both their illustrated and photographic configurations. The pin-up is viewed as a significant representational cultural artifact of idealistic and aspirational femininity and of consumerism and material wealth, especially reflective of the mid-twentieth century period in America spanning the 1930s to the 1960s. These images not only reflect great shifts in social mores and women’s social status, but also affected changes in both areas in turn. Furthermore, pin-up images internationally circulated in magazines, advertising and promotional material, contributed to the manner in which America was idealized in Europe and beyond. Crucially, they influenced how an eroticized and glamorous, yet unrealistic, example of femininity came to be generalized as a desirous model of femininity. In recent years there has been vital, though limited, scholarly research into the cultural and social impact of pin-up imagery, to which this thesis adds to. This thesis takes a genealogical approach, charting the development of popular female-centric “pin-up” imagery in America since the 1860s and up to the 1960s, and its resurgence since the 1980s onwards. In doing so this thesis aims to provide a social, political and cultural context to the emergence of a specific archetypal sexualized femininity, with the aim of challenging the tendency to dismiss sexualized imagery as “anti-feminist” or as trivial. Toward that end, I examine the complexity of intentions behind the production of “pin-up” images. In taking this revisionist approach I am better able to conclusively analyze the reasons for the resurgence and reappropriation of pin-up imagery in late-twentieth- and early-twenty-first-century popular culture, and consider what the gendered cultural implications may be. 740
302	Ducharme et Vian, phonographes du pornographe? : approche de l'esthétique de la transgression langagière dans "Le nez qui voque" et "L'automne à Pékin" Dubé, Jacinthe 19 April 2018 (has links) Ce mémoire propose un parallèle entre deux figures centrales des mouvements de transgression propres au XXe siècle, Boris Vian et Réjean Ducharme. Issu de l'interdiscursivit et ducharmienne et de la fascination de Vian pour l'Amérique, ce croisement d'imaginaires se veut une lecture accompagnée des parcours des deux auteurs et un approfondissement de leurs afinités par l'entremise de deux romans, Le nez qui voque et L'automne à Pékin. Sous l'égide de la transgression langagière, ces deux oeuvres déploient une critique ludique des institutions et, plus largement, une critique de la société de consommation et de la société du mérite. Cette mise à mal des systèmes dominants prend pour bouc-émissaire l'écrivain commercial, que Ducharme se plaît à qualifier de pornographe, et a pour arme un plurilinguisme désinvolte qui prend ses racines dans la langue parlée, reléguant Ducharme et Vian au statut de phonographes. / In this dissertation are analysed two major figures of the transgression that characterizes the 20th century, Boris Vian and Réjean Ducharme. This parallel is born of the interdiscursivity that is present in the work of Ducharme and of the fascination of Vian for America. It suggests a reading of their two imaginative worlds through the exploration of two novels, Le nez qui voque and L'automne à Pékin. In both works we see deployed, through transgressive language, a playful criticism of institutions and, more broadly, of consumer and meritocratic culture. The figure of the commercial writer, labelled as pornographer by Ducharme, acts as a scapegoat in this criticism, just as Ducharme's and Vian's multilingualism transforms them in phonographs who play with words and language with complete freedom. PN 35.5 UL 2012 Ducharme, Réjean, 1941-2017 -- Langue Vian, Boris, 1920-1959 -- Langue Transgression dans la littérature
303	Tränen in der modernen Kunst Spiekermann, Geraldine 15 June 2012 (has links) Tränen überschreiten die Grenzen des Körpers von innen nach außen und werden damit zu einem sichtbaren Anzeichen eines seelischen Extremzustands. In der Arbeit wird untersucht, ob die Träne, die Körpergrenzen gefährdet oder sogar auflöst, in der modernen und gegenwärtigen Kunst Metapher und Trägerin innerästhetischer Transgression werden kann. Dies bedeutet zugleich, dass eine Umwertung der Träne, von der Perle der Reinheit zu einem bedrohlichen Fluidum, stattgefunden hat. Die Träne als eine bedrohliche Grenzüberschreiterin ist ein Motiv, das in früheren Kunstepochen so nicht anzutreffen ist. Damit verweist sie zugleich exemplarisch auf die Auflösungsstrategien, welche die Kunst des 20. und 21. Jahrhunderts bestimmen. Fotoarbeiten von Man Ray, Madame Yevonde und Sam Taylor-Wood, Zeichnungen von Pablo Picasso und Hans Bellmer, Performances von Marina Abramović und Gina Pane, Video-arbeiten von Bill Viola und Bas Jan Ader, Installationen von Daniele Buetti und eine Buchserie von Dieter Roth, denen allen das Motiv der Träne gemeinsam ist, werden in einem Close Rea-ding auf Auflösungstendenzen hin untersucht. Besonderes Augenmerk gilt medienspezifischen Strukturen und Analogien. / Tears overstep the bounds of the human body from within – to become evidence of a crit-ical state of mind. The present study examines whether the tear, which endangers or even dispels the boundaries of the body, could be seen as a metaphor and even as an indication of aesthetic transgression in modern and contemporary art. This would mean that the tear as motif has also undergone a paradigm change, from the pearl of purity to a threatening fluid. The aspect of the tear as a transgressor of boundaries is not to be found in earlier periods of art. Accordingly, it also references the process of disintegration, which strongly determines 20th and 21st century art. Photographs by Man Ray, Madame Yevonde and Sam Taylor-Wood, drawings by Pablo Picasso and Hans Bellmer, performances of Marina Abramovic and Gina Pane, video works by Bill Viola and Bas Jan Ader, installations by Daniele Buetti and a series of books by Dieter Roth – which all deal with the tear complex – will be examined in close reading. Their connection with disintegrative tendencies will be scrutinised, and special attention given to media-specific structures and analogies. Körper Tränen Weinen Gefühl Affekt Ausdruck Grenzüberschreitung Körperflüssigkeiten Moderne Kunst Zeitgenössische Kunst Man Ray Madame Yevonde Sam Taylor-Wood Pablo Picasso Hans Bellmer Marina Abramovic Gina Pane Bill Viola Bas Jan Ader Daniele Buetti Dieter Roth Colyn de Coter Dirk Bouts Secondo Pia Georges Bataille Body Tears Crying Emotion Affect Expression Transgression Bodily Fluids Modern Art Contemporary Art Man Ray Madame Yevonde Sam Taylor-Wood Pablo Picasso Hans Bellmer Marina Abramovic Gina Pane Bill Viola Bas Jan Ader Daniele Buetti Dieter Roth Colyn de Coter Dirk Bouts Secondo Pia Georges Bataille 700 Künste, Bildende Kunst allgemein 46 Bildende Kunst LH 84123 ddc:700
304	Through the Eyes of Shamans: Childhood and the Construction of Identity in Rosario Castellanos' "Balun-Canan" and Rudolfo Anaya's "Bless Me, Ultima" Nava, Tomas Hidalgo 09 July 2004 (has links) (PDF) This study offers a comparative analysis of Rosario Castellanos' Balún-Canán and Rudolfo Anaya's Bless Me, Ultima, novels that provide examples on how children construct their identity in hybrid communities in southeastern Mexico and the U.S. southwest. The protagonists grow and develop in a context where they need to build bridges between their European and Amerindian roots in the middle of external influences that complicate the construction of a new mestizo consciousness. In order to attain that consciousness and free themselves from their divided selves, these children receive the aid of an indigenous mentor who teaches them how to establish a dialogue with their past, nature, and their social reality. The protagonists undertake that negotiation by transgressing the rituals of a society immersed in colonial dual thinking. They also create mechanisms to re-interpret their past and tradition in order to create an image of themselves that is not imposed by the status quo. In both novels, the protagonists have to undergo similar processes to overcome their identity crises, including transculturation, the creation of sites of memory, and a transition from orality to writing. Each of them resorts to creative writing and becomes a sort of shaman who pulls together the "spirits" from the past, selects them, and organizes them in a narration of childhood that is undertaken from adulthood. The results of this enterprise are completely different in the cases of both protagonists because the historical and social contexts vary. The boy in Bless Me, Ultima can harmoniously gather the elements to construct his identity, while the girl in Balún-Canán fails because of the pressures of a male-centered and highly racist society. Rosario Castellanos Rudolfo Anaya Balún-Canán Bless Me Ultima Shamans Tomás Hidalgo Nava construction of identity Chiapas Mexico New Mexico Ladino mestizo Chicano Mexican American childhood Octavio Paz José Vasconcelos Gloria Anzaldúa René Girard Edouard Glissant Pierre Nora lieux de mémoire milieux de mémoire hybrid hybridity transculturation Fernando Ortiz Angel Rama syncretism written narration shamanism of letters Homi K. Bhabha colonial discourse mestizo consciousness sexism colonialism Tzeltal indigenista orality mestizaje transgression of rituals Paulo Freire Mexican literature Chicano literature Mexican-American literature transculturation and nature Virgin of Guadalupe curandera Amerindian roots racism Spanish conquest acculturation assimilation project of modernization imposed views Antonio Ladino girl Comitán racist society colonial dual thinking identity crisis creative writing sites of memory U.S. southwest Classics Comparative Literature
305	The "Equalizer" Administration: Managerial Strategies in the Public Sector Cavalcanti, Bianor Scelza 08 April 2005 (has links) The purpose of this dissertation is to understand the managerial "action" of public administrators in the management of their organizations within the Brazilian context. The research seeks to understand the relationships between managers and formal management mechanisms by exploring the complementary nature of the effective managerial action in the face of structural deficiencies and flaws, considering the possibility of overcoming the structuralism-subjectivism dichotomy present in the construction of the Theory of Organizations. Initially, the study provides a review of the literature on organizational design. It highlights the "goodness of fit" proposition on strategic choice issues concerning the main organizational variables design and organizational goal attainment. It also calls special attention to the emerging interest of designing theorists on interpretivist approaches to the matter, such that of Karl Weick. A review of the the administrative reforms in Brazil is made from the perspective of the main stream organizational design conceptual framework. It highlights the complex dynamics of a constant search for differentiation and flexibilization subject to patterns of advances and reversals, due to the centrality, strength and pervasiveness of the bureaucratic model. It is concluded that in no single given moment, a public manager and his team, may count on a formal organizational design which attends the"congruency" criteria, devised by organizational design conceptual frameworks, to explain organizational results in different environmental sets. Although this conclusion may explain failure at the public sector, it can not provide understanding on the many instances of significative success attained by government operations in spite of inadequate formal administrative structures. This point calls for a better understanding from the interpretivist approach, on how public administrators, strongly associated with good organizational results, engage into transformative action, in order to superate administrative structures flaws and dysfunctional cultural patterns of conduct, structurally present and constantly reproduced, in vigorous developing countries, such as Brazil. The dissertation transcribes the testimony of four outstanding public administrators, doing a deep incursion in the managerial real world of public administration, as subjectively defined by them and transformed by their engagement into action.Through the thematic version of the Oral History methodology, full segments of the complete interviews are categorized into the thirty two managerial strategies captured which are presented on a recategorized manner under eight main strategies: (1) Interchanging Frames of Reference; (2) Exploring the Formal Limits; (3) Playing the Bureaucracy Game; (4) Inducing the Inclusion of Others (5)Promoting Internal Cohesion; (6) Creating Shields against Transgressions; (7) Overcoming Internal Restrictions; (8) Letting the Structures Blossom. Each one of these eight blocks of strategies presented, deserves further reflexive interpretation by the author, on the light of the interpretivist approach to organizational design. A final effort is made, now on theory building, for improving understanding on the matter. In order to find a significant meaning underlining all the strategies extracted from the "practical consciousness" of the interviewers as revealed in their report, the author resort to a metaphor. This metaphor helps to: (1) better describe and understand a not adequately treated phenomenon, namely, good results under inadequate structural social and organizational conditions; (2) reveal the logic and the meaning underlining all the strategies adopted to generate results under these unfaithful conditions; (3) name, accordingly to the nature of the managerial transformative social action involved, an open ended class of managerial interventions of a pragmatic sort driven by an ethics of results much common to good managers, that is, the concept of "managerial equalization"; and (4) give back to public administrators, represented by the interviewees, to be incorporated in their "discursive consciousness", something the most effective and experienced public managers already have as tacit knowledge built in their "practical consciousness", and so, help the education and development of new talents. / Ph. D. equalizer manager equalizing management unfaithfull structural conditions metaphor discursive cousciousness discourse practical cosciousness tacit knowledge agency intentionality ethics empirical bases improvising equalizing theory building meaning agent desining patrimonialism reflexive interpretation organizing inclusion cohesion transgression corruption clientelism nepotism cognitive maps deponents frames of reference transformative action explanation understanding oral history flexbilization decentralization uniformity conceptual frameworks organizational change goodness of fit organizational results organizational performance differentiation uncertainty Brazil develloping countries administrative reform bureaucratic model centralization organizational design organizational theory interpretivist approach subjectivism funcionalism paradigms cultural patterns reproduction structural flaws public manager public administrator formal management mechanisms Action managerial action public administration and management public sector public policy public programs
306	Methodological investigations on vegetation typology and phytogeography of rain forests of tropical Africa Senterre, Bruno B.M.L. 17 June 2005 (has links) I. An original methodological discussion is proposed on the problem of the typology of tropical rain forest’s plant communities, based on the study of forest types across gradients of continentality and elevation, within Atlantic central Africa. These investigations were based on the statement that the main problems in forest typology are related to the non-zonal or zonal character of the different vegetation types and to non considering the relations and differences between forest strata. II. Field data consisted in phytosociological homogeneous sample plots localized within different recognized phytogeographical entities, in a region of tropical Africa where these entities are known to be well conserved. A total of 37 such plots were inventoried in the region extending from the littoral forests of Ndoté, Equatorial Guinea, which are wet evergreen forests, to the continental forests of the Dja, Cameroon, known as evergreen seasonal forests. The studied region also included the oriental Atlantic forests of Equatorial Guinea, known as moist evergreen forests or caesalp forests. In various parts of this continentality gradient, some plots were localized within climax non-zonal formations, namely the submontane rain forests. The emphasis was put on the vegetation of the Monte Alén National Park. The sampling methodology was willing to be as "complete ", including all strata, "quantitative ", enumerating all individuals, and "representative ", within each stratum, as possible. These multi-layers plots were realised using nested sub-plots, with a sampling size of 100 individuals for every ligneous stratum recognized (dominant trees, dominated trees and shrubs) and a sampling size of 200m² for the herbaceous and suffrutex stratum. Forest types were defined independently for each stratum and the differences were analysed. A method was proposed for the simultaneous analysis of all floristic data, converting and standardizing the values from ligneous strata, on the one hand, and from understorey strata, on the other hand. III. Ten forest types were described using IndVal and discussed in the general context of the guineo-congolian region, from a syntaxonomic view point (agglomerative classification) and from a phytogeographical view point (divisive classification). Homologies between these two approaches are described. The proposed phytogeographical system is based on an "open " conception of hierarchical classifications, combining advantages of agglomerative and divisive classifications. In concrete terms, the non-zonal criteria, for example the submontane variants, are categorised separately and in analogy with the zonal criteria, related to the usual phytochoria. Analysis of ecological relationships for the 10 communities showed that the main variables related to the floristic variability in our mainland rain forests are elevation, rainfall, hygrometry (estimated using bryophytes cover levels) and distance to the ocean. The two extremes on the vertical microclimatic gradient, dominant trees stratum and herbaceous stratum, give similar typologies, however canonical analysis showed that for the herbaceous layer, non-zonal variables (hygrometry and elevation) were gaining more importance when the influence of the two zonal variables was attenuated. In every case, spatial autocorrelation was less important than the environment in explaining floristic variability but its role increased in the spatial arrangement of understorey species, whose dispersal capacity is generally lower than canopy trees. The phytosociological, phytogeographical and ecological description of forest types is accompanied by a physiognomical description using biological types spectrum, as well as architectural models, leaf sizes, etc. With regard to diversity, we have demonstrated that species richness was higher from upper to lower strata because of the accumulation in lower strata of species from various strata. On the other hand, the proper stratum diversity, i.e. the structural set, decreased from dominant trees to shrubs. The proper diversity of the herb layer showed relatively high figures mainly due to the higher individual density in relation to the existence of microstrata. Within the 37 sample plots, 1,050 taxa have been identified to species or morpho-species levels, for a total of 25,750 individuals. These taxa represent 442 genus among 104 families. The richest forest type is found on the foothills of the Niefang range, on the windward side. This forest type is also characterised by a high number of oligotypic genus and by species belonging to functional types indicators of glacial refuges. These functional types are defined on the basis of the dispersal capacity and on kind of stand needed for effective germination. We formulated the hypothesis that this kind of "foothills refuge ", characterised by his zonal nature, could have been one of the rare refuges for species from mainland rain forests, while montane and fluvial refuges would mainly have preserved species from non-zonal forest types: (sub)montane and riverine. Based on indicator species of submontane forests, a potential distribution map of this forest type has been realised at the Atlantic central African scale. More than 400 submontane forest localities have been mapped. These forests begin at 400m of altitude near the ocean, and progressively at higher altitude for increasing distance to the ocean. Many lowland localities also comprised submontane species, which could indicate the existence of ecological transgressions. These transgressions would allow migratory tracks for submontane species between isolated mountain ranges, not only during glacial periods, through heights at the northern and southern borders of the congo basin, but also contemporarily through the lowland riverine forest network, in the centre of this basin. Finally, a special attention has been attributed to littoral forests and to some cases of choroecological transgressions, coupled to the ecological equalization phenomenon. plant diversity foothills refuge glacial refuge environmental stability conservation rarefaction curves individuals-area curves species-area curves compensations écologiques Guinée Equatoriale Monte Alén Monts de Cristal Réserve de Ndoté rainforest transgression Monte Alén Cristal mountains strate forestière sous-bois ensemble structural groupe écologique modèles architecturaux guilde types fonctionnels synusie genres monotypiques genres paucispecifiques diversité végétale courbes aire-espèces courbes individus-espèces courbes de raréfaction courbes aire-constance aire minimale morpho-espèces pléistocène constancy-area curves minimal area structural ensemble understorey ecological group synusia oligotypic genus Réserve de Biosphère du Dja Cameroun Quaternaire glaciation refuge glaciaire refuge de pied de massifs montagneux stabilité environnementale conservation transgression forestière phytosociology plant community phytogeography open classification non-zonal nested plots forest types IndVal morphospecies pleistocene littoral forest rain forest afromontane submontane altitudinal belt glaciation Quaternary Equatorial Guinea ecological equalization continentality continentalité étage d’altitude forêt littorale forêt dense humide afromontagnard submontagnard IndVal types forestiers phytosociologie phytogéographie classification ouverte azonal relevés emboîtés multistrates monotypic genus architectural model guild plant functional type Ndoté Reserve Cameroon Dja Biosphere Reserve forest stratum forest layer understory
307	Recherches méthodologiques pour la typologie de la végétation et la phytogéographie des forêts denses d'Afrique tropicale Senterre, Bruno 17 June 2005 (has links) I. An original methodological discussion is proposed on the problem of the typology of tropical rain forest’s plant communities, based on the study of forest types across gradients of continentality and elevation, within Atlantic central Africa. These investigations were based on the statement that the main problems in forest typology are related to the non-zonal or zonal character of the different vegetation types and to non considering the relations and differences between forest strata.<p><p>II. Field data consisted in phytosociological homogeneous sample plots localized within different recognized phytogeographical entities, in a region of tropical Africa where these entities are known to be well conserved. A total of 37 such plots were inventoried in the region extending from the littoral forests of Ndoté, Equatorial Guinea, which are wet evergreen forests, to the continental forests of the Dja, Cameroon, known as evergreen seasonal forests. The studied region also included the oriental Atlantic forests of Equatorial Guinea, known as moist evergreen forests or caesalp forests. In various parts of this continentality gradient, some plots were localized within climax non-zonal formations, namely the submontane rain forests. The emphasis was put on the vegetation of the Monte Alén National Park.<p><p>The sampling methodology was willing to be as "complete ", including all strata, "quantitative ", enumerating all individuals, and "representative ", within each stratum, as possible. These multi-layers plots were realised using nested sub-plots, with a sampling size of 100 individuals for every ligneous stratum recognized (dominant trees, dominated trees and shrubs) and a sampling size of 200m² for the herbaceous and suffrutex stratum.<p><p>Forest types were defined independently for each stratum and the differences were analysed. A method was proposed for the simultaneous analysis of all floristic data, converting and standardizing the values from ligneous strata, on the one hand, and from understorey strata, on the other hand.<p><p>III. Ten forest types were described using IndVal and discussed in the general context of the guineo-congolian region, from a syntaxonomic view point (agglomerative classification) and from a phytogeographical view point (divisive classification). Homologies between these two approaches are described. The proposed phytogeographical system is based on an "open " conception of hierarchical classifications, combining advantages of agglomerative and divisive classifications. In concrete terms, the non-zonal criteria, for example the submontane variants, are categorised separately and in analogy with the zonal criteria, related to the usual phytochoria.<p><p>Analysis of ecological relationships for the 10 communities showed that the main variables related to the floristic variability in our mainland rain forests are elevation, rainfall, hygrometry (estimated using bryophytes cover levels) and distance to the ocean. The two extremes on the vertical microclimatic gradient, dominant trees stratum and herbaceous stratum, give similar typologies, however canonical analysis showed that for the herbaceous layer, non-zonal variables (hygrometry and elevation) were gaining more importance when the influence of the two zonal variables was attenuated. In every case, spatial autocorrelation was less important than the environment in explaining floristic variability but its role increased in the spatial arrangement of understorey species, whose dispersal capacity is generally lower than canopy trees. The phytosociological, phytogeographical and ecological description of forest types is accompanied by a physiognomical description using biological types spectrum, as well as architectural models, leaf sizes, etc.<p><p>With regard to diversity, we have demonstrated that species richness was higher from upper to lower strata because of the accumulation in lower strata of species from various strata. On the other hand, the proper stratum diversity, i.e. the structural set, decreased from dominant trees to shrubs. The proper diversity of the herb layer showed relatively high figures mainly due to the higher individual density in relation to the existence of microstrata. Within the 37 sample plots, 1,050 taxa have been identified to species or morpho-species levels, for a total of 25,750 individuals. These taxa represent 442 genus among 104 families. The richest forest type is found on the foothills of the Niefang range, on the windward side. This forest type is also characterised by a high number of oligotypic genus and by species belonging to functional types indicators of glacial refuges. These functional types are defined on the basis of the dispersal capacity and on kind of stand needed for effective germination. We formulated the hypothesis that this kind of "foothills refuge ", characterised by his zonal nature, could have been one of the rare refuges for species from mainland rain forests, while montane and fluvial refuges would mainly have preserved species from non-zonal forest types: (sub)montane and riverine.<p><p>Based on indicator species of submontane forests, a potential distribution map of this forest type has been realised at the Atlantic central African scale. More than 400 submontane forest localities have been mapped. These forests begin at 400m of altitude near the ocean, and progressively at higher altitude for increasing distance to the ocean. Many lowland localities also comprised submontane species, which could indicate the existence of ecological transgressions. These transgressions would allow migratory tracks for submontane species between isolated mountain ranges, not only during glacial periods, through heights at the northern and southern borders of the congo basin, but also contemporarily through the lowland riverine forest network, in the centre of this basin. Finally, a special attention has been attributed to littoral forests and to some cases of choroecological transgressions, coupled to the ecological equalization phenomenon.<p> / Doctorat en sciences agronomiques et ingénierie biologique / info:eu-repo/semantics/nonPublished Sciences exactes et naturelles Agronomie générale Phytogeography -- Africa, Sub-Saharan Forest surveys -- Africa, Sub-Saharan Phytogéographie -- Afrique noire Inventaires forestiers -- Afrique noire submontane afromontane rain forest littoral forest pleistocene morphospecies IndVal forest types nested plots non-zonal open classification phytogeography plant community phytosociology transgression forestière conservation stabilité environnementale refuge de pied de massifs montagneux refuge glaciaire glaciation Quaternaire Cameroun Réserve de Biosphère du Dja oligotypic genus synusia ecological group understorey structural ensemble minimal area constancy-area curves pléistocène morpho-espèces aire minimale courbes aire-constance courbes de raréfaction courbes individus-espèces courbes aire-espèces diversité végétale genres paucispecifiques genres monotypiques synusie types fonctionnels guilde modèles architecturaux groupe écologique ensemble structural sous-bois strate forestière Cristal mountains Monte Alén rainforest transgression Réserve de Ndoté Monts de Cristal Guinée Equatoriale compensations écologiques species-area curves individuals-area curves rarefaction curves environmental stability glacial refuge foothills refuge plant diversity altitudinal belt Quaternary Equatorial Guinea ecological equalization continentality continentalité étage d’altitude forêt littorale forêt dense humide afromontagnard submontagnard types forestiers phytosociologie phytogéographie classification ouverte azonal relevés emboîtés multistrates monotypic genus architectural model guild plant functional type Ndoté Reserve Cameroon Dja Biosphere Reserve forest stratum forest layer understory

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