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Olivier VOLDOIRE

Assistant-Ingénieur - Plataforme Instrumentale et Technique

Contact : olivier.voldoire@uca.fr

Tél : 04.73.34.68.20

ACL - Articles dans des revues à comité de lecture

2018


  • Miras Yannick, Ejarque Ana, Barbier-Pain Delphine, Corbineau Rémi, Ledger Paul, Mora Santiago Riera, Garreau Alexandre, Voldoire Olivier, Allain Elisabeth, Llach Javier Mangado, Torre Marta Sánchez de La, Grau Hector Mártinez, Bergadá Maria Mercè et Smith Susann (2018) « Advancing the analysis of past human/plant relationships: methodological improvements of artefact pollen washes », Archaeometry. DOI : 10.1111/arcm.12375. https://halshs.archives-ouvertes.fr/halshs-01739271.
    Résumé : The 'pollen washes' technique, based on the analysis of the pollen embedded in the porous surface of archaeological artefacts, is developed for investigating past plant usage and consumption and to characterize the functionality of artefacts related to plant processing, gathering and storage. The research presented results in relevant methodological improvements of this technique, which has never previously been applied on materials from European contexts. The improvements allow: (1) faster analysis of a broad series of artefacts or those with large use-surface areas likely to retain more pollen; and (2) a more thorough, deeper and precise cleaning method, allowing the study of smoother artefacts. Finally, the recovery of Trifolium-group pollen from a macro-lithic tool from Xicotó rock shelter (Montsec ranges, Spain) demonstrates that the pollen washes technique can reveal new insights into both the use and consumption of wild and domestic plants by prehistoric societies, and the functionality of archaeological objects whose interpretation is still problematic.
2017

  • Defive Emmanuelle, Berger Jean‑François, Poiraud Alexandre, Barra Adrien, Bouvard Emma, Virmoux Clément, Voldoire Olivier, Garreau Alexandre, Miras Yannick, Beauger Aude, Cabanis Manon, Gunnell Yanni, BRAUCHER Regis, Dendievel André‑Marie, Nomade Sébastien, Delvigne Vincent, Lafarge Audrey, Liabeuf René, Guillou Hervé et Raynal Jean-Paul (2017) « “ Les flux hydro-sédimentaires dans le bassin supérieur du fleuve Loire (Massif Central, France) au cours des trois derniers millénaires : archives séquentielles, chronologie et corrélations régionales ”, », QUATERNAIRE. https://hal.archives-ouvertes.fr/hal-01670720.
2016


  • Corenblit Dov Jean-François, Steiger Johannes, Charrier Gaspard, Darrozes José, Garófano-Gómez Virginia, Garreau Alexandre, González Eduardo, Gurnell Angela M., Hortobágyi Borbála, Julien Frédéric, Lambs Luc, Larrue Sébastien, Otto Thierry, Roussel Erwan, Vautier Franck et Voldoire Olivier (2016) « Populus nigra L. establishment and fluvial landform construction: biogeomorphic dynamics within a channelized river », Earth Surface Processes and Landforms, 41 (mai), p. 1276–1292. DOI : 10.1002/esp.3954. https://hal.archives-ouvertes.fr/hal-01381848.
    Résumé : Populations of the riparian pioneer species Populus nigra L. which establish on alluvial bars within river channels modulate sediment dynamics and fluvial landforms. Dense cohorts of P. nigra have colonized gravel point bars along the channelized River Garonne, France, during the last 20 years and have enhanced the vertical, lateral and longitudinal development of the bars. For this period, the geomorphic characteristics of two wooded point bars on this laterally stable river are closely linked to the spatial distribution and intensity of establishment and resistance of different cohorts of P. nigra. Furthermore, P. nigra colonization dynamics were controlled by engineer effects of this same species. This relationship is illustrated by a significant correlation between key geomorphic and biological variables measured in situ and characterized with a set of four aerial photographs taken between 2000 and 2010. The development of wooded point bars, which are discrete biogeomorphic units, over the studied period, appear to result from a specific biogeomorphic positive feedback of matter aggregation and vegetation establishment related to sediment trapping and stabilization by pioneer engineer plants.We propose a conceptual model of biogeomorphic unit construction for channelized, lateral stable rivers.We consider the resultant biogeomorphic units as functional from an ecological point of view because P. nigra enhances at the cohort scale (i) its own inherent capacity to resist hydrogeomorphic disturbances, and (ii) its resilience capacity as a result of successful colonization, especially downstream of mature poplar stands.
    Mots-clés : black poplar, fluvial landform, vegetation establishment.


  • Corenblit Dov Jean-François, Vidal Vincent, Cabanis Manon, Steiger Johannes, Garófano-Gómez Virginia, Garreau Alexandre, Hortobágyi Borbála, Otto Thierry, Roussel Erwan et Voldoire Olivier (2016) « Seed retention by pioneer trees enhances plant diversity resilience on gravel bars: Observations from the river Allier, France », Advances in Water Resources, 93 (mars), p. 182–192. DOI : 10.1016/j.advwatres.2016.02.015. https://hal.archives-ouvertes.fr/hal-01381840.
    Résumé : Pioneer riparian trees which establish in river active tracts on gravel bars enhance fine sediment reten- tion during high flows within their stands and in their lee side, forming obstacle marks. Fine sediment retention can be accompanied by deposition of seeds transported by water dispersal, i.e. by hydrochory. We tested the hypothesis that pioneer riparian trees significantly control seed deposition on gravel bars by forming sediment obstacle marks. We described the seed bank structure and compared samples col- lected from obstacle marks and bare coarse-grained bar surfaces. At the surface (at 2 cm depth), seed abundance ( N ) and richness ( S ) (expressed as mean ±sd) were significantly higher in areas directly af- fected by riparian trees, i.e. obstacle marks, ( N : 693 ±391; S : 17 ±3) than in bare surfaces ( N : 334 ±371; S : 13 ±5). Surface and sub-surface (at 20 cm depth) samples were also significantly different, with the sub-surface samples almost devoid of seeds (respectively N : 514 ±413; S : 15 ±5 and N : 3 ±6; S : 1 ±2). These results suggest a biogeomorphic feedback between sediment and associated seed retention medi- ated by hydrochory, vegetation growth and local seed dispersal mediated by barochory. Such feedback may improve plant diversity resilience on gravel alluvial bars of high-energy rivers.
    Mots-clés : Facilitation, Pioneer riparian species, Sediment tails, Seed bank.
2015


  • Beauger Aude, Delcoigne Arnaud, Voldoire Olivier, Serieyssol Karen K. et Peiry Jean-Luc (2015) « Distribution of diatom, macrophyte and benthic macroinvertebrate communities related to spatial and environmental characteristics: the example of a cut-off meander of the River Allier (France) », Cryptogamie, Algologie, 36 (3), p. 1-33. DOI : 10.7872/crya/v36.iss3.2015.1. https://hal.archives-ouvertes.fr/hal-01170337.
    Résumé : Currently, a consensus has been reached to protect and restore cut-off meanders. Therefore, it is important to understand how these wetlands function. To our knowledge, the spatial and temporal distribution of both benthic diatoms and macroinvertebrates, associated with macrophytes communities, linked to the geomorphology, has not been studied extensively. In the upstream and intermediate zones, the low water temperature and the high conductivity revealed a connection with the groundwater. Moreover, the geomorphological riffle characterizing the intermediate zone created the same downwelling and upwelling processes as in running water, with a groundwater/hyporheic/surface water ecotone and produced physico-chemical differences between the upstream and the downstream zones and thereby modify the diatom, macroinvertebrate and macrophyte distribution. Downstream, water input from the main channel of the Allier River allowed the development of taxa observed in the River. All these hydrological connections and the sedimentation modified the physical, chemical and geomorphological characteristics, thereby, creating a gradient of water quality, influencing the distribution of the biotic communities.
    Mots-clés : /, cut-off, diatoms, geomorphology, Macroinvertebrates, macrophytes, meander, water.


  • Beauger Aude, Delcoigne Arnaud, Voldoire Olivier, Serieyssol Karen et Peiry Jean-Luc (2015) « Distribution of Diatom, Macrophyte and Benthic Macroinvertebrate Communities Related to Spatial and Environmental Characteristics: The Example of a Cut-Off Meander of the River Allier (France) », Cryptogamie Algologie, 36 (3) (août), p. 323 - 355. DOI : 10.7872/crya/v36.iss3.2015.323. https://hal.archives-ouvertes.fr/hal-01771081.

  • Boivin Pierre, Beauger Aude, Miallier Didier, Merciecca Charley, Miras Yannick, Roussel Erwan, Vautier Franck et Voldoire Olivier (2015) « La Géologie du Creux de Soucy: un gouffre inexpliqué en milieu volcanique », Revue des Sciences Naturelles d'Auvergne. https://hal.archives-ouvertes.fr/hal-01664233.
2014

  • André Marie-Françoise, Vautier Franck, Voldoire Olivier et Roussel Erwan (2014) « Accelerated stone deterioration induced by forest clearance around the Angkor temples », Science of the Total Environment, 493, p. 98-108. https://hal.archives-ouvertes.fr/hal-01115192.
    Mots-clés : cultural heritage, geomorphology and weathering.

  • Beauger Aude, Peiry Jean-Luc, Lair Nicole et Voldoire Olivier (2014) « Ecological characterization of natural and impacted meander cut-offs of the River Allier using benthic macroinvertebrates », Ephemera, 14 (2) (mars), p. 83-106. https://hal.archives-ouvertes.fr/hal-01077881.
    Résumé : Today, the hydrological function and biodiversity of riverine secondary channels are generally recognized and managers tend to protect and restore them. In this study we focused on different parapotamal meander cut-offs. Six sites were examined, two of them being impacted by gravel extraction or deepened for halieutic activity. In order to test whether systematic differences in communities occurred upstream and downstream of the different sites, temperature and dissolved oxygen concentration were continuously monitored, other physical and chemical data were monthly measured and benthic macroinvertebrates were sampled in two seasons. Related to the abiotic data, in each site, water exchanges occurred between the river and / or the groundwater. In the unmodified sites, those few silted up displayed the greatest biodiversity with numerous EPT (Ephemeroptera, Plecoptera and Trichoptera) while in those largely silted, the habitat homogeneity induced a low biodiversity. In the two impacted sites, the upstream modification enhanced natural silting and few EPT were present while in the site largely open to the river, water quality, diversity and EPT richness remained high.
    Mots-clés : between-class Correspondence Analysis (bCA), habitats, physical and chemical monitoring.


  • Binder Didier, Hamon Caroline, Bellot-Gurlet Ludovic, Beyries Sylvie, Jean-Victor Pradeau, Vautier Franck et Voldoire Olivier (2014) « First Sculpted Human Face in the Western Mediterranean Early Neolithic », Cambridge Archaeological Journal, 24, p. 1-17. DOI : http://dx.doi.org/10.1017/S0959774314000043. https://hal.archives-ouvertes.fr/hal-01100046.
    Résumé : The development of Neolithic lifestyle in the Western Mediterranean during the 6th millennium cal BCE is the consequence of the spread of populations from the Near East after successive stages of cultural remodelling. Despite a clear contribution of the Near-Eastern and Aegean Neolithic to the economic and technical changes that happened to the West, few is known here about their symbolic legacies, because of the scarcity of representations and ritual evidences associated to the earliest Western Neolithic contexts. Excavations at the rock shelter of Pendimoun (South-Eastern France) yielded the first anthropomorphic stone sculpture from the Western Mediterranean Neolithic (Early 6th millennium cal BCE). Using both carving and painting techniques, it represents a rather realistic human face which is a unicum within the Western Mediterranean and European frames. After having described the shaping and colouring details of the mask, the authors here deal with its possible social significances and cultural connections.
    Mots-clés : anthropomorph, neolithic, sculpture, symbolism.


  • Binder Didier, Hamon Caroline, Bellot-Gurlet Ludovic, Beyries Sylvie, Pradeau Jean-Victor, Vautier Franck et Voldoire Olivier (2014) « First Sculpted Human Face in the Western Mediterranean Early Neolithic », Cambridge Archaeological Journal, 24 (1), p. 1-17. DOI : 10.1017/S0959774314000043. https://hal.archives-ouvertes.fr/hal-01545641.
    Résumé : The development of the Neolithic way of life in the western Mediterranean during the sixth millennium cal. BC is the consequence of the spread of populations from the Near East after successive stages of cultural remodelling. Despite the clear contribution of the Near Eastern and Aegean Neolithic to the economic and technical changes that happened to the west, little is known here about their symbolic legacies, because of the scarcity of representations and ritual evidences associated to the earliest western Neolithic contexts. Excavations at the rock shelter of Pendimoun (southeastern France) yielded the first anthropomorphic stone sculpture from the western Mediterranean Neolithic (early sixth millennium cal. BC). Using both carving and painting techniques, it represents a realistic-looking human face and is a unique example within the western Mediterranean and European frameworks. After describing the shaping and colouring details of the mask, the authors here deal with its possible social significances and cultural connections.
    Mots-clés : Neolithic Period, Pigment, Prehistoric art.


  • Binder Didier, Hamon Caroline, Bellot-Gurlet Ludovic, Beyries Sylvie, Pradeau Jean-Victor, Vautier Franck et Voldoire Olivier (2014) « First Sculpted Human Face in the Western Mediterranean Early Neolithic », Cambridge Archaeological Journal, 24 (01), p. 1–17. DOI : 10.1017/S0959774314000043. http://journals.cambridge.org/article_S0959774314000043.
    Résumé : The development of the Neolithic way of life in the western Mediterranean during the sixth millennium cal. BC is the consequence of the spread of populations from the Near East after successive stages of cultural remodelling. Despite the clear contribution of the Near Eastern and Aegean Neolithic to the economic and technical changes that happened to the west, little is known here about their symbolic legacies, because of the scarcity of representations and ritual evidences associated to the earliest western Neolithic contexts. Excavations at the rock shelter of Pendimoun (southeastern France) yielded the first anthropomorphic stone sculpture from the western Mediterranean Neolithic (early sixth millennium cal. BC). Using both carving and painting techniques, it represents a realistic-looking human face and is a unique example within the western Mediterranean and European frameworks. After describing the shaping and colouring details of the mask, the authors here deal with its possible social significances and cultural connections.


  • Corenblit Dov, Steiger Johannes, González E., Gurnell A. M., Charrier G., Darrozes J., Dousseau J., Julien F., Lambs L., Larrue Sébastien, Roussel Erwan, Vautier Franck et Voldoire Olivier (2014) « The biogeomorphological life cycle of riparian poplar during the fluvial biogeomorphological succession: a special focus on Populus nigra L. », Earth Surface Processes and Landforms, 39 (4) (mars), p. 546–563. DOI : 10.1002/esp.3515. https://hal.archives-ouvertes.fr/hal-01059244.
    Résumé : Riverine ecosystems are recurrently rejuvenated during destructive flood events and vegetation succession starts again. Poplars (i.e. species from Populus genera) respond to hydrogeomorphological constraints, but, in turn, also influence these processes. Thus, poplar development on bare mineral substrates is not exclusively a one-way vegetative process. Reciprocal interactions and adjustments between poplar species and sediment dynamics during their life cycle lead to the emergence of biogeomorphological entities within the fluvial corridor, such as vegetated islands, benches and floodplains. Based on a review of geomorphological, biological and ecological literature, we have identified and described the co-constructing processes between riparian poplars and their fluvial environment. We have explored the possibility that the modification of the hydrogeomorphological environment exerted, in particular, by the European black poplar (Populus nigra L.), increases its fitness and thus results in positive niche construction. We focus on the fundamental phases of dispersal, recruitment and establishment until sexual maturity of P. nigra by describing the hierarchy of interactions and the pattern of feedbacks between biotic and abiotic components. We explicitly relate the biological life cycle of P. nigra to the fluvial biogeomorphic succession model by referring to the ‘biogeomorphological life cycle’ of P. nigra. Finally, we propose new research perspectives based on this theoretical framework. Copyright © 2014 John Wiley & Sons, Ltd.
    Mots-clés : abiotic-biotic feedback, biogeomorphological life cycle, engineer species, evolutionary geomorphology, fluvial biogeomorphic succession model, Salicaceae.
2012
2011


  • André Marie-Françoise, Phalip Bruno, Voldoire Olivier, Vautier Franck, Géraud Yves, Benbakkar Mhammed, Constantin Christophe, Huber Fabienne et Morvan Gilles (2011) « Weathering of sandstone lotus petals at the Angkor site: a 1,000-year stone durability trial », Environmental Earth Sciences, 63, p. 1723-1739. DOI : 10.1007/s12665-010-0734-9. https://hal.archives-ouvertes.fr/hal-00682315.
    Mots-clés : Angkor temples, Cambodia, Chemical weathering, Mechanical weathering, Sandstone durability, Stone properties.
2010

C-ACT - Communications avec publication dans des actes

2015

  • Beauger Aude, Peiry Jean-Luc, Garreau Alexandre et Voldoire Olivier (2015) « Benthic diatom and macroinvertebrate communities from the impacted bypass channel of Poutès, upper Allier River (France): preliminary results before the dam removal. », in I.S. Rivers 2015, Lyon, France. https://hal.archives-ouvertes.fr/hal-01170126.
    Résumé : For the first time in France a dam is being removed in order to restore ecological and sediment continuity and to allow salmon migration. This modification of the dam of Poutès configuration allows the establishment of a long-term study. The first step is the evaluation of the geomorphological, sedimentary and ecological characteristics before the works in a reach of 21km including the bypassed section. This analysis is based on the study of diatoms and benthic macroinvertebrates collected upstream of the dam, in the bypassed section, and downstream of the penstock pipe release. The results show the impact of the dam on communities arising from a change in the water quality, but also habitats including the presence of very long and deep pools in the bypassed section, which alternate with rapids, which change the river dynamics of watercourse.
    Mots-clés : Benthic macroinvertebrates, bypass channel, Dam impacts, diatoms, longitudinal reach.
2011

  • André Marie-Françoise, Vautier Franck, Voldoire Olivier, Phalip Bruno et Roussel Erwan (2011) « Contribution to the international cooperation project for the conservation of the decorated pyramid steps of Ta Keo temple » (présenté à L International Co-ordinating Committee for the Safeguarding and Development of the Historic Site of Angkor, 18th Plenary session), in L International Co-ordinating Committee for the Safeguarding and Development of the Historic Site of Angkor, 18th Plenary session, Siem Reap, Cambodia : UNESCO, p. 56-63. https://hal.archives-ouvertes.fr/hal-01116047.
    Mots-clés : cultural heritage, geomorphology and weathering, stone decay.

C-COM - Communications orales dans une conférence nationale ou internationale

2015

  • Beauger Aude, Peiry Jean-Luc, Garreau Alexandre et Voldoire Olivier (2015) « Benthic diatom and macroinvertebrate communities from the impacted bypass channel of Poutès, upper Allier River (France): preliminary results before the dam removal. » (Communication orale), présenté à I.S. Rivers 2015, Lyon, France. https://hal.archives-ouvertes.fr/hal-01170126.
    Résumé : For the first time in France a dam is being removed in order to restore ecological and sediment continuity and to allow salmon migration. This modification of the dam of Poutès configuration allows the establishment of a long-term study. The first step is the evaluation of the geomorphological, sedimentary and ecological characteristics before the works in a reach of 21km including the bypassed section. This analysis is based on the study of diatoms and benthic macroinvertebrates collected upstream of the dam, in the bypassed section, and downstream of the penstock pipe release. The results show the impact of the dam on communities arising from a change in the water quality, but also habitats including the presence of very long and deep pools in the bypassed section, which alternate with rapids, which change the river dynamics of watercourse.
    Mots-clés : Benthic macroinvertebrates, bypass channel, Dam impacts, diatoms, longitudinal reach.
2014

  • Defive Emmanuelle, Poiraud Alexandre, Berger Jean-François, Virmoux Clément, SANIAL Bernard, Garcia Daniel, Voldoire Olivier, CHARRIER Gaspard, RENAULT Amélie, Guilbert Jacques, Bouvard Emma, Raynal Jean-Paul, Dendievel André-Marie, Voruz Jean-Louis, Miras Yannick, Cabanis Manon, Beauger Aude, Gunnell Yanni, Braucher Régis, Barra Adrien, GREGOIRE Fabrice, Blanc Elodie, DUMOULIN François, Guadelli Jean-Luc, Lafarge Audrey et Delvigne Vincent (2014) « Réponse des têtes de bassin aux fluctuations environnementales, du Tardiglaciaire à l’Actuel : l’exemple du bassin supérieur de la Loire dans le massif du Mézenc (Velay-Vivarais, Sud-Est du Massif central, France) » (Communication orale), présenté à Colloque AFEQ-CNF INQUA Q9 " Le Quaternaire : marqueurs, traçeurs et chronomètres ", 26-28 mars 2014, Lyon, France. (AFEQ-CNF INQUA). https://hal.archives-ouvertes.fr/hal-01131230.
    Résumé : Dans le Massif central, les têtes de bassin (ordre Strahler 3-4 et inférieur) sont un domaine encore peu investi pour l’étude des flux hydro-sédimentaires liés aux fluctuations environnementales quaternaires. Le système hydrographique naissant recèle pourtant d’intéressantes archives sédimentaires, à l’échelle au moins des temps postérieurs au dernier glaciaire. Motivé par les observations préliminaires effectuées ces dernières années dans le massif du Mézenc (Velay oriental, bassin supérieur de la Loire), le programme WRACC, financé par l’Etablissement Public Loire et le FEDER, se propose d’aborder l’étude de ces dépôts et de leur environnement sous l’angle d’une approche géoarchéologique pluridisciplinaire. La prospection est en cours, et s’appuie sur des coupes naturelles ainsi que sur l’ouverture de tranchées en travers d’un fond de vallon (Champetienne) où se sont concentrées nos investigations. Les données analytiques ne sont pas encore disponibles. Il est cependant possible, grâce aux observations stratigraphiques et aux premières datations obtenues, de poser quelques jalons. A l’échelle de l’Holocène au moins, les cours d’eau semblent avoir fluctué dans leur fond de vallon sans progrès de l’encaissement, alternant phases de stockage et de déstockage. La forme des chenaux successifs et le gabarit des matériaux les remblayant témoignent des fluctuations corrélatives du style fluvial et de la compétence. Les séquences débutent généralement par une nappe alluviale très grossière d’âge indéterminé témoignant d’un système de forte énergie. Le 4e-5e siècle après J.-C. semble marquer le terme d’une phase de stabilité avec remaniement des horizons pédologiques et de la végétation. Après cette vigoureuse phase de détritisme, la période stable allant des 8e-9e siècles au 15e siècle est enfin suivie par une crise érosive de faible énergie à l’Epoque Moderne, où la part respective des forçages naturels (PAG) et anthropiques peut être plus particulièrement discutée.
    Mots-clés : Eastern Velay, French Massif Central, Géoarchéologie, Geoarcheology, Holocene.
2013
2012
2010

C-AFF - Affiches / posters dans une conférence nationale ou internationale

2018

  • Verney Vincent, Bissagou Koumba Gaëlle, DELOR JESTIN Florence, ZDYBAL Dominik, Askanian Haroutioun, PEIRY Jean-Luc, Roussel Erwan, Voldoire Olivier, Schaal Alexandre, DURANTOU Lise et LIBOIRON Max (2018) « Macro et Micro(plastiques) Présents dans les Environnements de Rivières Françaises » (Poster), présenté à . https://hal.archives-ouvertes.fr/hal-01706578.
    Résumé : On sait maintenant que la plus grande majorité des microplastiques trouvés dans les mers et océans proviennent des terres et à ce titre les environnements eaux douces (rivières et berges) jouent un rôle majeur dans ce processus. Il faut donc imaginer le scénario qu'un plastique usagé, devenu un déchêt après usage, se retrouve dans l'environnement s'il est sorti, pour une raison ou une autre, d'une filière de collecte et de recyclage. Son séjour dans l'environnement peut durer très longtemps et ce déchêt va alors être exposé à un ensemble de contraintes environnementales (UV, pluie, vent, érosion mécanique,..) qui vont poursuivre et amplifier sa dégradation, conduisant à sa fragmentation depuis le macroplastiques en microplastiques, voire en nanoplastiques. Les travaux que nous avons engagés se déclinent suivant deux projets: 1/ Le projet Riverplast (ICCF/ Observatoire du microplastique): Les objectifs du projet Riverplast sont de: - Prélever et analyser la composition de microplastiques dans les eaux de surface de différentes rivières (Allier, Charente, Loire, Touvre,..). Pour cela, nous nous appuyons sur des opérations de science citoyenne, en particulier grace à l'apport du filet de prélèvement babyleg [1,2] qui permet de multiplier les prélèvements et les analyses. 2/-Le projet Plasticcages (ICCF/GEOLAB-PEPS CNRS INEE 2015) : macro et microPLASTIques dans la rivière allier: oCCurrence spAtiale, méthodoloGies analytiquEs et modélisation de la fragmentation [3, 4] Les objectifs du projet Plasticcage sont de: - cartographier la densité de macroplastiques présents sur les rives et son évolution au cours du temps sur un site expérimental de la rivière Allier, et lier cela à la densité du couvert végétal. - Mettre en place sur site une pollution contrôlée. - Analyser la composition du gisement et son évolution au cours du temps. - Analyser la composition de microplastiques extraits des sédiments, en particulier à l'entrée du bras mort, zone ou peuvent exister des tourbillons d'écoulements.
    Mots-clés : freshwater, Microplastics.
    Note Note
    <p>Poster</p>
2015

  • Larrue Sébastien, Daehler Curtis C., Meyer Jean Yves, Pouteau Robin et Voldoire Olivier (2015) « Distribution, abundance and photosynthetic characteristics of the invasive tree Spathodea campanulata on the island of Tahiti (South Pacific Ocean) » (Poster), présenté à EMAPi 2015: 13th International Conference of Ecology and Management of Alien Plant Invasions. https://hal.archives-ouvertes.fr/hal-01226561.
    Résumé : Successful invasion is often a combination of species characteristics (or invasiveness) and habitat suitability (or invasibility). Our objective was to identify preferred habitats and suitable environmental conditions for the African tulip tree Spathodea campanulata (Bignoniaceae), one of the most invasive alien tree in the tropical island of Tahiti (South Pacific Ocean), in relation with its photosynthesis capacity. Spathodea abundance and leaf Chlorophyll fluorescence was examined in relation to topography and micro-climate along an elevational transect between 140 m and 1,300 m. Results show that Spathodea is (1) present up to 1,240 m where the mean daily temperature is 14.7°C, (2) is able to colonize slopes of more than 45°, (3) is over-represented in the elevational range 140-540 m as well as in the less disturbed forests found between 940 m and 1,040 m, suggesting a high threat for indigenous and endemic plants. Between 541-840 m Spathodea is under-represented supporting that this range is a non-preferred environment probably due to micro-climate conditions with punctual extreme events in temperature and air dryness. Major infestations on the island of Tahiti was recently reported on the leeward (drier) west coast, but Spathodea has also been recently found on the slopes of the windward (wetter) east coast. Chlorophyll fluorescence measurements indicate a high photosynthetic capacity among Spathodea in wet environments from sea level up to high elevations, suggesting that Spathodea will become an abundant invader on most of the island of Tahiti. Lien poster : http://geolab.univ-bpclermont.fr/IMG/png/poster_emapi_5.png
    Mots-clés : elevation ranges, Invasive species, leaf chlorophyll fluorescence, micro-climate, Spathodea campanulata, Tahiti..
2014
2013
2011

  • Arrignon Florent, Corenblit Dov, Delmotte Sebastien, Voldoire Olivier, Vautier Franck et Steiger Johannes (2011) « Modelling the biogeomorphologic evolution of vegetated fluvial corridors: the cellular automaton GALET » (poster), présenté à EUROMECH Colloquium 523. Ecohydraulics: linkages between hydraulics, morphodynamics and ecological processes in rivers. European Mechanics Society. https://hal.archives-ouvertes.fr/hal-01117142.
    Mots-clés : cellular automaton, fluvial corridors.

  • Ejarque Ana, Miras Yannick, Steiger Johannes, Beauger Aude, Voldoire Olivier, Peiry Jean-Luc, Vautier Franck et K. Serieyssol Karen (2011) « 2000 ans de paléodynamique fluviale et d’histoire du paysage dans la plaine alluviale de l’Allier révélés par l’analyse multi-proxy de 2 paléochenaux (Auvergne, France) » (poster), présenté à Palynologie et diversités: marqueurs, milieux, méthodes, modèles, applications, september 19-22, Meudon, France. https://hal.archives-ouvertes.fr/hal-01112312.

CH - Chapitres d'ouvrage

2015

  • Steiger Johannes, Corenblit Dov Jean-François, Arrignon Florent, Beauger Aude, Dejaifve P-A, Delmotte Sebastien, Hortobágyi Borbála, Lambs Luc, Planty-Tabacchi Anne-Marie, Sans F., Simon P., Tabacchi Eric, Valette Philippe, Vautier Franck, Voldoire Olivier et Yeny E. (2015) « Contribution de l'analyse multi-temporelle pour la gestion et restauration des cours d'eau : végétation riveraine et résilience (projet GALE&T) », in Concilier la gestion de l'eau et des territoires, éd. par L. Goeldner-Gianella, O. Barreteau, A. Euzen, M. Pinon-Leconte, Q. Gautier, et P. Arnould, Editions Johanet, p. 41-55. https://hal.archives-ouvertes.fr/hal-01576295.
    Mots-clés : cours d'eau, gestion, végétation riveraine.
2014
2012

  • Phalip Bruno, Voldoire Olivier, André Marie-Françoise, Vautier Franck et Roussel Erwan (2012) « Les grès de Souvigny : un diagnostic des altérations sur les églises Saint-Marc et Saint-Pierre. », in Souvigny – La priorale et le prieuré, éd. par D. Renault-Jousseau, P. Chevalier, A. Maquet B. Phalip, Vol., 101, Editions d'Art Somogy. (Cahiers du Patrimoine). https://hal.archives-ouvertes.fr/hal-01115104.
    Mots-clés : erosion, Patrimoine Architectural, pierre monumentale.

AP - Autres publications

2011

  • André Marie-Françoise, Vautier Franck, Phalip Bruno, Voldoire Olivier, Etienne Samuel, Mercier Denis et Roussel Erwan (2011) Les parements sculptés de Ta Keo : diagnostic et origine de la détérioration de la pierre, et perspectives de conservation, Research Report, UNESCO - Comité International de Coordination pour la Sauvegarde et le développement du Site Historique d’Angkor, 20ème Session Technique, 4 pages p. https://hal.archives-ouvertes.fr/hal-01116072.
    Mots-clés : détérioration de la pierre monumentale, érosion, patrimoine.
  • André Marie-Françoise, Vautier Franck, Voldoire Olivier, Phalip Bruno et Roussel Erwan (2011) Contribution de GEOLAB au projet de coopération internationale pour la conservation des parements sculptés du temple de Ta Keo, 8 p. (Rapport d’étape UNESCO, 18ème Session plénière du Comité International de Coordination pour la Sauvegarde du Site d’Angkor et de sa Région).
2010

  • André Marie-Françoise, Phalip Bruno, Voldoire Olivier, Vautier Franck et Roussel Erwan (2010) La détérioration des motifs sculptés dans trois grès d’Angkor : influence des facteurs géologiques et environnementaux, Research Report, UNESCO - Comité International de Coordination pour la Sauvegarde et le développement du Site Historique d’Angkor, 19ème Session Technique, 4 p. p. https://hal.archives-ouvertes.fr/hal-01116065.
    Mots-clés : Angkor temples, geomorphology and weathering, stone decay.
  • André Marie-Françoise, Vautier Franck, Voldoire Olivier, Etienne Samuel, Mercier Denis, Corenblit Dov, Phalip Bruno et Roussel Erwan (2010) Le temple de Ta Keo : contribution au diagnostic de détérioration des parements sculptés et à la définition des futures stratégies de conservation et de valorisation, Rapport d’étape UNESCO. (17ème session plénière du Comité International de Coordination pour la Sauvegarde et le Développement du Site d’Angkor).