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| Registros recuperados: 38 | |
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| Beliaeff, Benoit; Bouvet, Guenole; Fernandez, Jean-michel; Laugier, Thierry; David, Carine. |
| This guide is intended to facilitate the implementation of specifications for marine environmental monitoring in New Caledonia. It is intended for public or private environmental actors. He provides a set of information on marine monitoring: summary of environmental regulations and the practical implications, definitions of terms, proposed general approach for the establishment of a monitoring, sampling strategy elements, method to develop reference frames, recommendations for the management and exploitation of data collected. The guide also provides lists of suggested environmental parameters to monitor for different pressures and general state of the environment, as well as, a set of methodology sheets for parameters and (when available) the reference... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00050/16163/13647.pdf |
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| Pasqualini, Vanina; Derolez, Valerie; Garrido, Marie; Orsoni, Valerie; Baldi, Yoann; Etourneau, Sabrina; Leoni, Vanina; Rebillout, Patrick; Laugier, Thierry; Souchu, Philippe; Malet, Nathalie. |
| Increases in the intensity of disturbances in coastal lagoons can lead to shifts in vegetation from aquatic angiosperms to macroalgal or phytoplankton communities. Such abrupt and discontinuous responses are facilitated by instability in the equilibrium controlling the trajectory of the community response. We hypothesized that the shift in macrophyte populations is reversible, and that this reversibility is dependent on changes in the pressures exerted on the watershed and lagoon functioning. Biguglia lagoon (Mediterranean Sea, Corsica) is an interesting case study for the evaluation of long-term coastal lagoon ecosystem functioning and the trajectory of submerged macrophyte responses to disturbances, to facilitate the appropriate restoration of... |
| Tipo: Text |
Palavras-chave: Coastal lagoons; Human pressures; Long-term changes; Submerged macrophytes; Community shifts. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00372/48341/48564.pdf |
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| Hebert, M.; Dupre, Nicolas; Barral, M.; Messiaen, Gregory; Oheix, Jocelyne; Deslous-paoli, Jean-marc; Roque D'Orbcastel, Emmanuelle; Laugier, Thierry. |
| OBJECTIF DU PROGRAMME - L’objectif de ce projet sur la réimplantation d’herbiers de phanérogames est d’étudier la faisabilité technique et la définition des conditions optimales de réimplantation des herbiers, à petite échelle dans un premier temps (14 m2par site). Les conclusions de cette étude permettront d’étudier la pertinence de poursuivre sur une seconde phase à plus grande échelle. Trois lagunes, caractérisées par un niveau d’eutrophisation compatible avec la réimplantation d’herbiers, ont été sélectionnées pour le projet : l’étang d’Ingril, l’étang de Thau et l’étang de Bages-Sigean . |
| Tipo: Text |
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| Ano: 2012 |
URL: http://archimer.ifremer.fr/doc/00089/20062/17703.pdf |
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| Le Gendre, Romain; Soulard, Benoit; Lemonnier, Hugues; Laugier, Thierry; Hubert, Morgane; Desclaux, Terence; Royer, Florence; Le Tesson, Eric; Dumas, Franck; Kayara, Jean-françois. |
| Ce rapport fait partie du projet de recherche PRESENCE (PRessions sur les Ecosystèmes récifaux et lagonaires de Nouvelle-CalédoniE). L'objectif de ce projet est de mieux appréhender le fonctionnement des lagons de Nouvelle-Calédonie à partir d’observations in-situ, de télédétection et de modélisation hydrodynamique. Ce rapport présente les mesures effectuées sur les lagons de Touho à Pouébo situés sur la côte Est de la Province Nord de Nouvelle-Calédonie, secteur sur lequel les connaissances et observations du fonctionnement hydrodynamique étaient assez parcellaires. Les données seront utilisées par la suite pour mieux appréhender la dynamique de ce grand lagon mais également à des fins de calibration et de validation de modèle... |
| Tipo: Text |
Palavras-chave: Mesures; Hydrologie; Courantologie; Hydrodynamique; Hienghène; Hyehen; Pouébo; Pweevo; Modélisation. |
| Ano: 2018 |
URL: http://archimer.ifremer.fr/doc/00452/56378/58028.pdf |
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| Collos, Y; Vaquer, A; Laabir, M; Abadie, Eric; Laugier, Thierry; Pastoureaud, Annie; Souchu, Philippe. |
| A monitoring program with a weekly sampling frequency over a 15-month period indicates that urea concentrations above a certain threshold level may trigger the blooms of Alexandrium catenella in Thau lagoon. However, urea concentrations were also sometimes related to ammonium and dissolved organic nitrogen concentrations, indicating that the role of urea may not be a direct one. An original approach is used to assess the relative contribution of several nitrogen sources (nitrate, nitrite, ammonium, urea) to growth of A. catenella by comparing nitrogen uptake rates to nitrogen-based growth rates estimated from dilution experiments during four blooms over a 4-year period (2001-2004) in Thau lagoon. Nitrate and nitrite contributed 0.1-14% and 0.1-5%... |
| Tipo: Text |
Palavras-chave: Uptake kinetics; Ammonium; Urea; Growth; Nitrogen; HAB; Alexandrium catenella. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/2007/publication-6454.pdf |
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| Castro Jimenez, J; Deviller, Genevieve; Ghiani, A; Loos, R; Mariani, G; Skejo, H; Umlauf, G; Wollgast, J; Laugier, Thierry; Heas Moisan, K; Leaute, Frederique; Munschy, Catherine; Tixier, Celine; Tronczynski, Jacek. |
| Ambient concentrations, congener patterns and multi-media distribution of PCDD/Fs and PCBs were determined in air, water, sediment and mussels in a semi-enclosed marine ecosystem (Thau lagoon, France). Sigma 2,3,7,8-PCDD/F and Sigma 7ICES PCB air concentrations (0.2-1.4 and 31-57 pg m(-3), respectively) were typical of rural areas. Concentrations in the water column were very low for PCDD/Fs (163-476 fg L-1) and low for PCBs (138-708 pg L-1). PCDD/F and PCB concentrations found in surface sediment (0.15-1.6 and 2.5-33 ng g(-1) d.w., respectively) and mussel (13-21 pg g(-1) d.w. and 10-39 ng g(-1) d.w., respectively) were medium levels. PCDD/F congener patterns observed in air, water particulate phase and sediments were similar suggesting direct coupling... |
| Tipo: Text |
Palavras-chave: Water column; Mussel; Air Sediment; POPs. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-4807.pdf |
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| Mongruel, Remi; Vanhoutte-brunier, Alice; Fiandrino, Annie; Valette, Francois; Balle-beganton, Johanna; Perez Agundez, José A.; Gallai, Nicola; Derolez, Valerie; Roussel, Sebastien; Lample, Michel; Laugier, Thierry. |
| This paper describes the building of an integrated simulation tool based on a systems approach, and its contribution to local political discussion of the mitigation of microbiological contamination of the water in a coastal area. Local management schemes view water quality as a high-priority environmental objective. In practice, how far this objective is achieved depends on trade-offs between the costs of improved water treatment facilities and the acceptable impacts of water contamination. An in-the-field experiment in collaboration with local managers was carried out in the Thau lagoon on the French Mediterranean coast during the SPICOSA (Science and Policy Integration for Coastal System Assessment) project, from 2007 through 2011. It consisted of... |
| Tipo: Text |
Palavras-chave: Systems modeling; Integrated assessment; Microbiological contamination; Technical options; Strategic planning. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00136/24775/22959.pdf |
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| Rodriguez, Thibault; Fourrier, Adeline; Mazouni, Nabila; Rey-valette, Helene; Roussillon, Jean Philippe; Laugier, Thierry; Loubersac, Lionel. |
| After a reminder on the program SYSCOLAG (Coastal and Lagoons Systems), of the regulatory and legislative context in territorial economic planning on the coast, we describe the structure of the developed methodological tool. We clarify then the method according to its three main trunk roads: effects of the activities and uses on the economy of the territory, the effects of the activities and uses on the natural environment and the living environment, the evaluation of the interactions between activities and uses. We apply the method exposed in a frame demonstrator by taking the scenario of the lagoon and coastal territory of the Thau Basin (Hérault). A set of appendices, including in particular evaluation grids are supplied with support for the... |
| Tipo: Text |
Palavras-chave: Développement durable; Approche participative et pluridisciplinaire; SCOT; Volet Maritime; Diagnostic; Indicateur; Mer; Littoral; Impact environnemental; Effet socio-économique; Interaction; Activité; Usage. |
| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/00189/30058/28545.pdf |
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| Castro-jimenez, J.; Mariani, G.; Vives, I.; Skejo, H.; Umlauf, G.; Zaldivar, J. M.; Dueri, Sibylle; Messiaen, Gregory; Laugier, Thierry. |
| Atmospheric concentrations and deposition fluxes of PCDD/F and PCB have been evaluated over a 1-year period in a Mediterranean coastal lagoon (Etang de Thau, France). Indicative PBDE air concentrations in the hot season are also reported in this work. ∑2,3,7,8-PCDD/Fs and ∑18PCBs (gas + particulate) air concentrations ranged from 67 to 1700 fg m−3 and from 13 to 95 pg m−3, respectively whereas ∑8PBDEs (gas + particulate) summer time levels varied from 158 to 230 pg m−3. The PCDD/F and PCB atmospheric occurrence over Thau lagoon and subsequent inputs to the surface waters are determined by an assemble of factors, being the seasonality of atmospheric concentration, the air mass origin and meteorological conditions important drivers. Total (wet + dry)... |
| Tipo: Text |
Palavras-chave: PCDD/F; Dioxin-like PCB; PBDE; Air; Water. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00033/14429/12600.pdf |
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| Minghelli-roman, Audrey; Laugier, Thierry; Polidori, Laurent; Mathieu, Sandrine; Loubersac, Lionel; Gouton, Pierre. |
| The Thau lagoon, located in southern France, suffers episodically from anoxic crises locally known as 'malaigue'. Such crises mostly occur under warm conditions, low winds leading to a strong eutrophication of the lagoon. The development of a sulphur bacterium sometimes gives locally to the waters a 'milky turquoise' appearance and leads to shellfish mortality. One of the indicators of the eutrophication status of the lagoon can be surveyed by the chlorophyll product provided by remote sensing images such as Medium Resolution Imaging Spectrometer (MERIS). In this paper we compare chl2 (or algal2) estimations provided by MERIS level 2 products and the ground measurements of chlorophyll a concentrations in water and we propose a linear correction of the chl2... |
| Tipo: Text |
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| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00032/14283/11608.pdf |
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| Mouillot, D; Spatharis, S; Reizopoulou, S; Laugier, Thierry; Sabetta, L; Basset, A; Chi, T. |
| 1. Transitional waters, described as critical transition zones because of their position at terrestrial, freshwater and marine interfaces, provide essential goods and services to the biosphere including human populations. These ecotones face increasing human influence mainly due to population density increase in coastal areas. 2. Transitional water bodies have, to date, received little attention in the development of ecological status indicators, this is a critical deficiency when trying to meet the Water Framework Directive objective of all significant water bodies achieving good ecological status by the year 2015. 3. In order to assess changes in transitional water communities many taxonomic-based indicators have already been proposed but there are a... |
| Tipo: Text |
Palavras-chave: Biotic descriptors; Productivity; Functional diversity; Functional traits; Body size; Water Framework Directive WFD. |
| Ano: 2006 |
URL: http://archimer.ifremer.fr/doc/2006/publication-1849.pdf |
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| Masseret, Estelle; Bierne, Nicolas; Chevret, Pascale; Roumagnac, Marie; Bec, Béatrice; Laugier, Thierry; Collos, Yves; Vaquer, Andre. |
| Coastal lagoons are morphologically and ecologically complex ecosystems, subject to constantly changing environmental conditions generally of much greater magnitude than it is recorded in the open sea. Due to their transitional nature, they usually display a number of specific features (ie. high nutrient concentrations, light spectral quality, salinity range) which are potentially influencing strategies of adaptation of photosynthetic microorganisms. The unicellular cyanobacteria Synechococcus is a major component of marine and freshwater picophytoplankton. Its genetic diversity is well documented for these ecosystems, but knowledge about biodiversity and distribution of this genus in transitional waters remains scarce. The phylogenetic analysis of a... |
| Tipo: Text |
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| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/00011/12198/8960.pdf |
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| Laugier, Thierry; Selmaoui-folcher, Nazha; Soulard, Benoit. |
| Ce séminaire de réflexion, souhaité et organisé conjointement par la province Nord et l’IRD, en association avec l’ensemble des organismes de recherche scientifique présents en Nouvelle-Calédonie, avait pour objectif à la fois de : • dresser et présenter un bilan des recherches scientifiques conduites par les différents organismes de recherche en province Nord, mais également de • poser les bases prospectives d’une recherche scientifique qui, dans le futur, réponde au mieux aux attentes et besoins exprimés par la province Nord. Deux questions générales et transversales ont donc sous-tendu, du 19 au 21 juin 2013, les réflexions et travaux des trois journées d’échanges et de discussions : • Quelles recherches scientifiques développer pour venir en appui... |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00272/38371/36683.pdf |
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| Daloz, Aurélien; Gaertner-mazouni, Nabila; Barral, Marc; Malet, Nathalie; Moragues, Laurent; Fiandrino, Annie; Laugier, Thierry; Derolez, Valerie; Munaron, Dominique. |
| Le RSL véritable outil de veille et d’aide à la décision, produit chaque année un diagnostic des lagunes de la Région Languedoc-Roussillon vis-à-vis de l’eutrophisation.Il permet ainsi d’alimenter les réflexions dans le cadre des démarches de gestion concertée, d’orienter la mise en œuvre d’action et les travaux de restauration prioritaires. |
| Tipo: Text |
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| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00008/11946/8652.pdf |
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| Laugier, Thierry; Malet, Nathalie; Munaron, Dominique; Derolez, Valerie; Fiandrino, Annie; Barral, Marc; Moragues, Laurent; Mazouni, Nabila; Graille, Chantal. |
| The poster presents the approach that led to the construction of a network of cooperation between managers and scientists for coastal lagoon management in the region of Languedoc-Roussillon, its architecture and modus operandi, its achievements and developments over time. At the end of the ninety’s, eutrophication and lack of knowledge were identified as issues to enhance the management of coastal lagoons on the Mediterranean coast of France. In 2000, in the region of Languedoc-Roussillon, scientists (Ifremer) and institutional managers (Regional Council of Languedoc-Roussillon and Water Agency Rhône-Méditerranée & Corse) joined their forces in building a network to address this need. The core of this network consists of an operational tool for the... |
| Tipo: Text |
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| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/00002/11343/8101.pdf |
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| Lemonnier, Hugues; Lantoine, Francois; Courties, Claude; Guillebault, Delphine; Nezan, Elisabeth; Chomerat, Nicolas; Escoubeyrou, Karine; Galinie, Christian; Blockmans, Bernard; Laugier, Thierry. |
| Tropical shrimp aquaculture systems in New Caledonia regularly face major crises resulting from outbreaks of Vibrio infections. Ponds are highly dynamic and challenging environments and display a wide range of trophic conditions. In farms affected by vibriosis, phytoplankton biomass and composition are highly variable. These conditions may promote the development of harmful algae increasing shrimp susceptibility to bacterial infections. Phytoplankton compartment before and during mortality outbreaks was monitored at a shrimp farm that has been regularly and highly impacted by these diseases. Combining information from flow cytometry, microscopy, pigment and phylogenetic analysis, the presence of Picocyanobacteria, Prasinophyceae and Diatomophyceae were... |
| Tipo: Text |
Palavras-chave: Tropical aquaculture pond; Litopenaeus stylirostris; Vibriosis; Eutrophication; Phytoplankton; Harmful algae. |
| Ano: 2016 |
URL: http://archimer.ifremer.fr/doc/00343/45411/44986.pdf |
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| Brehmer, Patrice; Thang Do Chi,; Laugier, Thierry; Galgani, Francois; Laloe, Francis; Darnaude, Audrey M.; Fiandrino, Annie; Mouillot, David. |
| 1. Abiotic and biotic variables of coastal lagoons are highly heterogeneous in both space and time, and this heterogeneity complicates the assessment of their ecological status. These variables are essential to the monitoring and preservation of these fragile ecotones and the resources and services they sustain. 2. An integrative approach for evaluating the ecological status of coastal lagoons, based on field investigations of the key parameters driving their functioning and a set of selected ecological indicators matching lagoon management information needs for societal benefits, is investigated. Consistency in lagoon status evaluation from multiple and different variables was estimated, through a case study comparing three adjacent yet contrasting French... |
| Tipo: Text |
Palavras-chave: Coastal lagoon; Ecological assessment; Ecotoxicology; Eutrophication; Indicator; Management; Mediterranean Sea; Observatory. |
| Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00056/16702/14202.pdf |
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| Loubersac, Lionel; Do Chi,; Fiandrino, Annie; Jouan, Mathieu; Derolez, Valerie; Lemsanni, Abdellah; Rey Valette, Hélène; Mathe, Syndhia; Pages,; Mocenni,; Casini,; Paoletti,; Pranzo,; Valette, François; Serais, Ophelie; Laugier, Thierry; Mazouni, Nabila; Vincent,; Got,; Troussellier, Marc. |
| 1 - In the Thau lagoon (Southern Mediterranean Coast) the main anthropogenic pressure is represented by the urban development in the watershed, whilst oyster and mussel farming represents one of the main economical activities in the region. 2 - During the last decade, the increasing organic loads from watershed and urban settlements in the lagoon surroundings have caused a diffuse contamination by faecal bacteria. Also toxic algal blooms have been occurring, impairing water quality with major impacts on shellfish farming, fishery and bathing. 3 - In this study, indicators and scenarios identified for the lagoon have been integrated in a Decision Support System (DSS) to evaluate the best solutions for reducing pressures and improving both water quality and... |
| Tipo: Text |
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| Ano: 2007 |
URL: http://archimer.ifremer.fr/doc/00089/20053/17693.pdf |
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| Registros recuperados: 38 | |
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