Trois scénarios d'évolution prospectifs pour le front pionnier de la réserve forestière de Ticoporo

International audienceDans le cadre d’une recherche d’aide à la décision pour l’aménagement régional, l’analyse des différents cheminements d’évolution empruntés par un front pionnier pastoral en domaine forestier tropical permet de présenter un modèle spatial du territoire de Ticoporo (piémont des Andesvénézueliennes). Ce dernier sert de référence pour envisager les modifications futures selon trois logiques prospectives

Linhas gerais para construção de um modelo de avaliação de impacto da inovação aplicável a organizações de pesquisa agropecuária

This article is focused on a conceptual model of the innovation impact assessment process, especially directed to agricultural research organisations. This research proposes an existing methodology based on a literature review. The innovative contributions of this article are I. theoretical lines for constructing a model of impact assessment as a base for a future data based management system; II. a conceptual base of innovation impact assessment process that considers a cross-cut view of sustainability, integrating the environmental, social, policy, and economic dimensions. This article intends to present a theoretical model addressed to research and innovation organisations that will contribute to fulfilling the United Nations’ sustainable development goals towards more productive and sustainable agriculture and accomplishing stakeholder challenges and demands.  This article is focused on a conceptual model of the innovation impact assessment process, especially directed to agricultural research organisations. This research proposes an existing methodology based on a literature review. The innovative contributions of this article are I. theoretical lines for constructing a model of impact assessment as a base for a future data based management system; II. a conceptual base of innovation impact assessment process that considers a cross-cut view of sustainability, integrating the environmental, social, policy, and economic dimensions. This article intends to present a theoretical model addressed to research and innovation organisations that will contribute to fulfilling the United Nations’ sustainable development goals towards more productive and sustainable agriculture and accomplishing stakeholder challenges and demands.  This article is focused on a conceptual model of the innovation impact assessment process, especially directed to agricultural research organisations. This research proposes an existing methodology based on a literature review. The innovative contributions of this article are I. theoretical lines for constructing a model of impact assessment as a base for a future data based management system; II. a conceptual base of innovation impact assessment process that considers a cross-cut view of sustainability, integrating the environmental, social, policy, and economic dimensions. This article intends to present a theoretical model addressed to research and innovation organisations that will contribute to fulfilling the United Nations’ sustainable development goals towards more productive and sustainable agriculture and accomplishing stakeholder challenges and demands.  Este artigo está focado em um modelo conceitual de avaliação de impacto, especialmente direcionado a organizações de pesquisa agropecuária. Baseado em revisão de literatura, suas contribuições inovadoras são: I. linhas teóricas para a construção de um modelo de avaliação de impacto como base para um futuro sistema de gestão; II. uma base conceitual para avaliação de impacto de inovação que leva em conta uma perspectiva transversal de sustentabilidade, integrando as dimensões ambiental, social, política e econômica. O artigo apresenta um modelo teórico aplicável a organizações de pesquisa e inovação em sintonia com os Objetivos de Desenvolvimento Sustentável das Nações Unidas, bem como buscando uma lógica sistêmica que atenda aos desafios e demandas das partes interessadas da instituição de pesquisa.

A paisagem como ferramenta de análise de políticas públicas de conservação ambiental : o caso da fronteira Brasil – França

International audienc

Shocked and Scorched: The Tail of a Tadpole in an Interstellar Pond

We report multi-wavelength observations of the far-infrared source IRAS 20324+4057, including high-resolution optical imaging with HST, and ground-based near-infrared, millimeter-wave and radio observations. These data show an extended, limb-brightened, tadpole-shaped nebula with a bright, compact, cometary nebula located inside the tadpole head. Our molecular line observations indicate that the Tadpole is predominantly molecular, with a total gas mass exceeding 3.7 Msun. Our radio continuum imaging, and archival Spitzer IRAC images, show the presence of additional tadpole-shaped objects in the vicinity of IRAS 20324+4057 that share a common E-W head-tail orientation: we propose that these structures are small, dense molecular cores that originated in the Cygnus cloud and are now being (i) photoevaporated by the ultraviolet radiation field of the Cyg OB2 No. 8 cluster located to the North-West, and (ii) shaped by ram pressure of a distant wind source or sources located to the West, blowing ablated and photoevaporated material from their heads eastwards. The ripples in the tail of the Tadpole are interpreted in terms of instabilities at the interface between the ambient wind and the dense medium of the former.Comment: (accepted by the Astrophysical Journal

La spatialisation de la biodiversité : pour la gestion durable des territoires

Depuis le sommet de Rio de Janeiro en 1992, la diversité du vivant n’est plus l’apanage des biologistes : le concept de biodiversité envisage les relations du monde biologique avec les sociétés. La diversité se trouve en effet à présent au cœur des préoccupations de développement durable et de conservation. L’Amazonie, considérée comme une région de très grande diversité, attire depuis longtemps toutes les convoitises mais suscite désormais des inquiétudes : la nature inépuisable nous apparaît dès lors comme une biodiversité en péril. Mais, comment évaluer l’état et les transformations de la biodiversité de cette immense région ? Quels sont les effets des nombreuses politiques publiques de développement et de conservation qui s’y sont multipliées ces dernières décennies ? Cet ouvrage présente d’abord la complexité de quelques situations locales amazoniennes – des systèmes agricoles indigènes aux fronts pionniers associés à l’élevage extensif. L’imagerie satellitale permet ensuite de cartographier les dynamiques de la biodiversité végétale dans l’espace et le temps à partir d’une analyse des paysages et de l’estimation de leur complexité grâce à une démarche pluridisciplinaire (de la botanique à l’anthropologie). Les transformations des paysages et les variations concomitantes de la biodiversité sont par ailleurs mises en relation avec les politiques publiques et les actions privées. L’approche méthodologique, volontairement simple, a été élaborée avec l’ambition d’être applicable à d’autres espaces forestiers tropicaux

Integral field spectroscopy of protoplanetary disks in Orion with VLT FLAMES

We discuss integral field spectroscopy of proplyds in M42 using the FLAMES Argus unit and report the first detection of recombination lines of C II and O II from the archetypical Laques-Vidal-2 object. These lines can provide important new diagnostics of the physical conditions in proplyds. We also draw attention to the future capabilities of the MUSE spectrograph in relation to similar studies.Comment: 5 pages; 3 figs; To appear in proceedings of "Science with the VLT in the ELT era" (ESO Garching, Oct. 2007