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Journal ArticleDOI

L’écologie humaine de Pierre Dansereau et la métaphore du paysage intérieur

01 Jan 2012-Natures Sciences Sociétés (EDP Sciences)-Vol. 20, Iss: 1, pp 30-38

AbstractLa renommee de Pierre Dansereau n’est plus a faire dans le monde des sciences de l’environnement, de l’ecologie et de l’ecologie humaine. Sa disparition recente, a quelques jours de son centenaire, a souleve une vague de reconnaissance pour sa longue carriere et son grand engagement humaniste. C’est dans ce contexte qu’est ancre le propos du present article. Nous entreprenons ici d’examiner la pertinence scientifique de l’ecologie humaine de Dansereau a la lumiere de deux defis epistemologiques rencontres par toute science s’interessant aux rapports des humains a leur environnement : l’usage des modeles explicatifs « naturalistes » et l’utilisation de metaphores. Les metaphores naturalistes, affirmons-nous, donnent une image trop simpliste de la dimension symbolique du rapport a la nature. Apres avoir examine les deux principales metaphores naturalistes qui ont marque l’ecologie, nous montrons que l’ecologie humaine de Dansereau, si elle est bien ancree dans l’une d’elles, ne fait pas l’erreur d’ignorer l’importance des representations symboliques de l’environnement, qu’il introduit par la belle metaphore du paysage interieur. more

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7 citations

Journal ArticleDOI
30 May 2012
Abstract: Comme le fait remarquer des l’introduction son auteur, ce livre n’est pas un manuel d’ecologie. Il s’agit plutot d’un ouvrage d’accompagnement des precis d’ecologie, un texte de reflexion et de contextualisation. Cet ouvrage d’ecologie historicogeographique, qui integre l’homme, propose une grille de lecture tres riche et diversifiee de l’ecologie et de ses discours. Il apporte des eclairages epistemologiques, historiques, economiques, anthropologiques et geographiques qui manquent souvent da...

1 citations

Journal ArticleDOI
01 Dec 2017
Abstract: The article analyzes work done in Brazil by Canadian ecologist Pierre Dansereau (1911-2011) under a scientific cooperation agreement between the Intellectual Cooperation Division of the Brazilian Ministry of Foreign Affairs and the Canadian Embassy, signed in 1944. Dansereau, a leading figure in twentieth-century ecology, came to Brazil in 1945 as director of the Quebec Province Biogeography Service. His proposed ecological research plan called for the organization of scientific expeditions, specialized staff training, and future international cooperation with such Brazilian institutions as the National Museum, the National Geography Council, and the Oswaldo Cruz Institute. His stay in Brazil affords an opportunity to analyze the interrelations between the geopolitics of Brazilian developmentalism, Quebec nationalism, Pan-Americanism as an intellectual movement, and the attempt to establish a francophone research network in biogeography, ecology, and plant sociology.

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01 Jul 1935-Ecology
Abstract: the climatic factors, though for purposes of separation and classification of systems it is a legitimate procedure. In fact the climatic complex has more effect on the organisms and on the soil of an ecosystem than these have on the climatic complex, but the reciprocal action is not wholly absent. Climate acts on the ecosystem rather like an acid or an alkaline " buff er " on a chemical soil complex. Next comes the soil complex which is created and developed partly by the subjacent rock, partly by climate, and partly by the biome. Relative maturity of the soil complex, conditioned alike by climate, by subsoil, by physiography and by the vegetation, may be reached at a different time from that at which the vegetation attains its climax. Owing to the much greater local variation of subsoil and physiography than of climate, and to the fact that some of the 4The mental isolates we make are by no means all coincident with physical systems, though many of them are, and the ecosystems among them. This content downloaded from on Thu, 11 Aug 2016 05:29:06 UTC All use subject to July, 1935 VEGETATIONAL CONCEPTS AND TERMS 301 existing variants prevent the climatic factors from playing the full part of which they are capable, the developing soil complex, jointly with climate, may determine variants of the biome. Phillips' contention that soil never does this is too flatly contrary to the experience of too many ecologists to be admitted. Hence we must recognise ecosystems differentiated by soil complexes, subordinate to those primarily determined by climate, but none the less real. Finally comes the organism-complex or biome, in which the vegetation is of primary importance, except in certain cases, for example many marine ecosystems. The primary importance of vegetation is what we should expect when we consider the complete dependence, direct or indirect, of animals upon plants. This fact cannot be altered or gainsaid, however loud the trumpets of the " biotic community " are blown. This is not to say that animals may not have important effects on the vegetation and thus on the whole organismcomplex. They may even alter the primary structure of the climax vegetation, but usually they certainly do not. By all means let animal and plant ecologists study the composition, structure, and behaviour of the biome together. Until they have done so we shall not be in possession of the facts which alone will enable us to get a true and complete picture of the life of the biome, for both animals and plants are components. But is it really necessary to formulate the unnatural conception of biotic comimiunity to get such co-operative work carried out? I think not. What we have to deal with is a system, of which plants and animals are components, though not the only components. The biome is determined by climate and soil and in its turn reacts, sometimes and to some extent on climate, always on soil. Clements' "prisere " ('16) is the gradual development of an ecosystem as we may see it taking place before us to-day. The gradual attainment of more complete dynamic equilibrium (which Phillips quite rightly stresses) is the fundamental characteristic of this development. It is a particular case of the universal process of the evolution of systems in dynamic equilibrium. The equilibrium attained is however never quite perfect: its degree of perfection is measured by its stability. The atoms of the chemical elements of low atomic number are examples of exceptionally stable systems-they have existed for many millions of millennia: those of the radio-active elements are decidedly less stable. But the order of stability of all the chemical elements is of course immensely higher than that of an ecosystem, which consists of components that are themselves more or less unstable-climate, soil and organisms. Relatively to the more stable systems the ecosystems are extremely vulnerable, both on account of their own unstable components and because they are very liable to invasion by the components of other systems. Nevertheless some of the fully developed systems-the " climaxes "-have actually maintained themselves for thousands of years. In others there are elements whose slow change will ultimately bring about the disintegration of the system. This content downloaded from on Thu, 11 Aug 2016 05:29:06 UTC All use subject to 302 A. G. TANSLEY Ecology, Vol. 16, No. 3 This relative instability of the ecosystem, due to the imperfections of its equilibrium, is of all degrees of magnitude, and our means of appreciating and measuring it are still very rudimentary. Many systems (represented by vegetation climaxes) which appear to be stable during the period for which they have been under accurate observation may in reality have been slowly changing all the time, because the changes effected have been too slight to be noted by observers. Many ecologists hold that all vegetation is always changing. It may be so: we do not know enough either to affirm or to deny so sweeping a statement. But there may clearly be minor changes within a system which do not bring about the destruction of the system as such. Owing to the position of the climate-complexes as primary determinants of the major ecosystems, a marked change of climate must bring about destruction of the ecosystem of any given geographical region, and its replacement by another. This is the clisere of Clements ('16). If a continental icesheet slowly and continuously advances or recedes over a considerable period of time all the zoned climaxes which are subjected to the decreasing or increasing temperature will, according to Clements' conception, move across the continent " as if they were strung on a string," much as the plant communities zoned round a lake will move towards its centre as the lake fills up. If on the other hand a whole continent desiccates or freezes many of the ecosystems which formerly occupied it will be destroyed altogether. Thus whereas the prisere is the development of a single ecosystem in situ, the clisere involves their destruction or bodily shifting. When we consider long periods of geological time we must naturally also take into account the progressive evolution and rise to dominance of new types of organism and the decline and disappearance of older types. From the earlier Palaeozoic, where we get the first glimpses of the constitution of the organic world, through the later Palaeozoic where we can form some fairly comprehensive picture of what it was like, through the Mesozoic where we witness the decline and dying out of the dominant Palaeozoic groups and the rise to prominence of others, the Tertiary with its overwhelming dominance of Angiosperms, and finally the Pleistocene ice-age with its disastrous results for much of the life of the northern hemisphere, the shifting panorama of the organic world presents us with an infinitely complex history of the formation and destruction of ecosystems, conditioned not only by radical changes of land surface and climate but by the supply of constantly fresh organic components. We can never hope to achieve more than a fragmentary view of this history, though doubtless our knowledge will be very greatly extended in the future, as it has been already notably extended during the last 30 years. In detail the initiation and development of the ecosystems in past times must have been governed by the same principles that we can recognize to-day. But we gain nothing by trying to envisage in the same concepts such very different processes as are involved in the shifting or destruction of ecosystems on the one hand and the development of individual systems on the This content downloaded from on Thu, 11 Aug 2016 05:29:06 UTC All use subject to July, 1935 VEGETATIONAL CONCEPTS AND TERMS 303 other. It is true, as Cooper insists ('26), that the changes of vegetation on the earth's surface form a continuous story: they form in fact only a part of the story of the changes of the surface of this planet. But to analyse them effectively we must split up the story and try to focus its phases according to the various kinds of process involved.

1,923 citations

"L’écologie humaine de Pierre Danser..." refers background in this paper

  • ...Dans son célèbre article intitulé « The use and abuse of vegetational concepts and terms », Tansley (1935) rassemblait ses critiques de l’approche organiciste et remettait en cause les concepts de succession et de développement qui donnaient, selon lui, une image trop unidirectionnelle des…...


01 Jan 1970

1,159 citations

Journal ArticleDOI
06 Apr 1997
Abstract: Pollution des rivieres, embryons congeles, virus du sida, trou d'ozone, robots a capteurs... Comment comprendre ces "objets" etranges qui envahissent notre monde ? Relevent-ils de la nature ou de la culture ? Jusqu'ici, les choses etaient simples : aux scientifiques la gestion de la nature, aux politiques celle de la societe. Mais ce traditionnel partage des tâches est impuissant a rendre compte de la proliferation des " hybrides ". D'ou le sentiment d'effroi qu'ils procurent, et que ne parviennent pas a apaiser les philosophes contemporains. Et si nous avions fait fausse route ? En fait, notre societe " moderne " n'a jamais fonctionne conformement au grand partage qui fonde son systeme de representation du monde : celui qui oppose radicalement la nature d'un cote, la culture de l'autre. Dans la pratique, les modernes n'ont cesse de creer des objets hybrides, qui relevent de l'une comme de l'autre, et qu'ils se refusent a penser. Nous n'avons donc jamais ete vraiment modernes, et c'est ce paradigme fondateur qu'il nous faut remettre en cause aujourd'hui pour comprendre notre monde. Traduit dans plus de vingt langues, cet ouvrage, en modifiant de fond en comble la repartition traditionnelle entre la nature au singulier et les cultures au pluriel, a depuis sa parution profondement renouvele les debats en anthropologie. En offrant une alternative au postmodernisme, il a ouvert de nouveaux champs d'investigation et, avec son " Parlement des choses ", offert a l'ecologie de nouvelles possibilites politiques.

528 citations

Journal ArticleDOI
Abstract: paradigm which impedes recognition of the societal significance of current ecological realities. Thus, sociology stands in need of a fundamental alteration in its disciplinary paradigm. The objectives of this article are to make explicit the &dquo;Human Exemptionalism Paradigm&dquo; implicit in traditional sociological thought, and to develop an alternative &dquo;New Ecological Paradigm&dquo; which may better serve the field in a post-exuberant age.

523 citations