CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory

Nice, France

CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory

Nice, France
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Salapare III H.S.,University of the Philippines at Diliman | Tiquio Ma.G.J.P.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory | Ramos H.J.,University of the Philippines at Diliman
Applied Surface Science | Year: 2013

Posidonia oceanica samples were exposed to argon and oxygen plasma at varying plasma energies. The untreated and treated samples were characterized to study the weight loss, wettability, surface roughness, and surface chemical functionalities. It was observed that oxygen plasma treatment showed greater weight loss than the argon plasma treatment. Superhydrophilic surfaces (θ < 5°) were achieved at 180 kJ argon-plasma treatment and 6 kJ and18 kJ oxygen-plasma treatments. The surface roughness increases as the plasma energies were increased for the argon-plasma treatment; however, opposite trend was seen for the oxygen-plasma treatment. The -CH2 groups and the aliphatic C-H groups were absent from the FT-IR spectra of the superhydrophilic samples. © 2013 Elsevier B.V. All rights reserved.


Arceo H.O.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory | Cazalet B.,University of Perpignan | Alino P.M.,University of the Philippines at Diliman | Mangialajo L.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory | Francour P.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory
Marine Policy | Year: 2013

The management of fisheries resources in the northwestern Mediterranean is traditionally centralized and developed within the framework of coastal states and European Union common policies. In general, it has not been sufficiently effective in reversing the declining situation of fisheries resources and fishers in this region. This paper discusses the feasibility of moving away from a top-down approach in fisheries management towards a more participative and convergent mode of governance in the region. More specifically, the study focuses on MPAs as a fisheries management tool and evaluates their current establishment and management system in the French Mediterranean as a case study for the region. A brief review of the experiences on fisheries and MPA management in the Philippines is also presented to obtain insights on bottom-up and collaborative management approaches. Finally, possible opportunities for adopting a more decentralized and coordinated approach in fisheries management within the French socio-political system, and possibly in the northwestern Mediterranean region, are discussed. These include the existence of fishing community organizations in the region, such as the prud'homies in France and cofradias in Spain, starting with management strategies that are simpler to enforce and more acceptable to direct users, e.g., fishery reserves, and exploring co-management arrangements to manage fisheries at ecologically meaningful but operationally manageable scales as has been proposed by some development organizations. However, effective changes in the system would require major national policy and institutional reforms, social preparation and organizational strengthening which would take time and resources. © 2012 Elsevier Ltd.


Nouira T.,Higher Institute of Agriculture | Risso C.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory | Chouba L.,National Institute of science and Technologies of the Sea | Budzinski H.,University of Bordeaux 1 | Boussetta H.,Higher Institute of Agriculture
Chemosphere | Year: 2013

An assessment of PCB and PBDE contamination of surface sediments in Monastir Bay was carried out in two contrasted seasons of the year. Samples were collected from 5 sites and analyzed for the ∑7 marker PCBs (i.e. PCBs 28, 52, 101, 118, 138, 153 and 180) and ∑4 PBDE congeners (PBDEs 47, 99, 119 and 153) by GC/ECD. Concentrations of both PCBs and PBDEs showed seasonal variations. PCB concentrations were in the range of 3.1-9.3ngg-1 and 1.1-8.1ngg-1 in wet and dry season respectively, and sediments were considered moderately contaminated with PCBs. All PCBs analyzed were detected in surface sediments. PCB 153 and 52 congeners showed the highest relative abundance in both winter and summer. PBDE concentrations ranged from not detect to 0.1ngg-1, with only BDE-47 congener detected in sediments and only in winter. Analysis of spatial and seasonal variations indicated that PCB distribution is governed by hydrodynamics and temporal variability of inputs. While the PCB contamination appeared to be mainly land-based, PBDEs are suspected to originate from atmospheric deposition. © 2013 Elsevier Ltd.


Pastor J.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory | Francour P.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory
Acta Ichthyologica et Piscatoria | Year: 2010

Background. This study was initiated by the first observations of a coastal and benthic Atlantic fish species-Parablennius pilicornis (Cuvier, 1829) on the southern coasts of France. This fish has been recorded in the Mediterranean Sea since 1963, until recently colonizing its entire western part as well as the Adriatic Italian coasts. The aim of this study is to analyse and understand the dynamics of this invasion of P. pilicornis and to report its most recent sightings along the Provencal coast, France. Materials and Methods. The data on the geographic distribution of P. pilicornis were either extracted from the relevant literature (majority of records) or contributed by the present authors. For the French coast, particularly the coast of Provence, the latter were data from underwater visual censuses, conducted during various studies or monitoring programs. The data were critically selected, organised, and analysed. Results. Two dispersal pathways seem to have been followed by P. pilicornis. The first follows the coast of Morocco, Algeria, and Italy. The second pathway goes through the Spanish and French coasts. The meeting point of these two ways may be located on the coast of Provence, where we lastly observed this species in 2006. The emergence of P. pilicornis in the Mediterranean Sea corresponds clearly to a marginal dispersal. Colonization of the western Mediterranean took 43 years. Conclusion. Since P. pilicornis is already present on the Italian coast of the Adriatic Sea, the colonization of the eastern Mediterranean seems imminent. Global change, including rising temperatures, seem to be a factor promoting the repartition area of this fish with tropical affinities.


Risso-de Faverney C.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory | Guibbolini-Sabatier M.E.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory | Francour P.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory
Marine Environmental Research | Year: 2010

Tyre artificial reefs were deposited in a marine protected area (Vallauris-Golfe Juan Bay, France) located along the NW Mediterranean coast, during the early 80's. The potential toxic effects of the tyre artificial reefs were investigated using transplantation of marine mussels, Mytilus galloprovincialis, to stations located above tyre blocks (St1, St2) or reference site (StR). Mussels transplanted to different stations presented the following sequence of mortality: St1 > St2 > StR. Principal Component Analysis, taking into account metal accumulation (cadmium, copper and zinc) and biomarker (SOD, CAT, GST and AChE activities, TBARS and MT levels, Condition Index) responses in mussel tissues indicated a clear separation between the three stations. St1 organisms were significantly more affected by tyre reefs than those from other stations. Such an integrated monitoring study represents a key approach to assess in situ the biological impact of >25 year-old tyre artificial reefs. © 2010 Elsevier Ltd.


Valls A.,Agrocampus Ouest | Valls A.,University of British Columbia | Gascuel D.,Agrocampus Ouest | Guenette S.,Agrocampus Ouest | Francour P.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory
Marine Ecology Progress Series | Year: 2012

The present study describes the food web and evaluates the effects of a marine protected area (MPA), the Port-Cros National Park (NW Mediterranean Sea), on the marine eco-system inside the reserve and its potential to sustain resources outside the reserve. We built an Ecopath model of the Port-Cros MPA which comprised 41 functional groups and represented an average situation for the period 1998 to 2008. At a high trophic level, fish were dominated by the amberjacks and large dusky grouper groups, 2 abundant top predators playing a central role inb the ecosystem in terms of keystone species and trophic cascades. The biomass accumulation rate estimated with Ecopath could reach 10% yr-1 for large dusky groupers, which is consistent with field observations, suggesting that the MPA succeeded in protecting the species. The total export from the MPA was estimated at a maximum of about 100 tons yr -1, which limits the benefits at a local scale. EcoTroph fishing scenarios showed that the current state of the ecosystem inside the reserve was close to the unexploited state, and that current fishing practices had an insignificant impact. The major effects of the MPA were to protect the high trophic level groups and thus to maintain the functional biodiversity within the reserve. In summary, trophic modeling seems to be a relevant approach to study the effects of MPAs and to improve their management. © Inter-Research 2012.


Seytre C.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory | Francour P.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory
Marine and Freshwater Research | Year: 2014

Marine reserves have become an important tool advocated to protect diversity, habitat or to restore depleted fish stocks. However, the links between reserve effect and temporal variability of assemblages remains equivocal. The present study presents the results obtained in a long-term series of annual surveys in the Scandola Marine Reserve (Corsica, North-western Mediterranean). An underwater visual census was performed on Posidonia oceanica seagrass beds. Species richness and density of target fish were positively affected by fishing prohibition in the no-take zone. The whole assemblage density and density of non-target and prey fish, prevailing in the seagrass bed, were not or negatively affected by fishing prohibition. Concomitantly, temporal stability was positively related to fishing prohibition. This stabilisation of the fish assemblage in the no-take zone had not been observed over rocky reefs in previous studies. This outcome may be linked to wandering predators of rocky areas, preying upon seagrass fish assemblages. In addition, the complete fishing ban appeared to be to only effective tool in restoring target fish stocks and maintaining a higher stability of the fish assemblage whereas partial fishing prohibition failed to meet this goal.


Mamindy-Pajany Y.,University of Nice Sophia Antipolis | Mamindy-Pajany Y.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory | Hurel C.,University of Nice Sophia Antipolis | Marmier N.,University of Nice Sophia Antipolis | Romeo M.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory
Desalination | Year: 2011

In this paper, adsorption of arsenic (V) was studied under different physico-chemical conditions onto four commercial adsorbents: hematite, goethite, magnetite and zero-valent iron (ZVI). The reversibility of adsorption process was also studied using chlorides and phosphates as competing ions. Results show that arsenate adsorption is related to the iron content of adsorbents, and adsorption rate increases in the following order: goethite < hematite < magnetite < ZVI. The modeling of adsorption isotherms by empirical models show that arsenate adsorption is fitted by the Langmuir model for almost all adsorbents, suggesting a monolayer adsorption of arsenic onto adsorbents. Desorption experiments show that arsenic is strongly adsorbed onto hematite and ZVI. Among adsorbents, hematite appears to be the most suitable for removing arsenate in natural medium since it is effective over large ranges of pH and arsenic concentration. © 2011 Elsevier B.V.


Prato G.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory | Gascuel D.,Agrocampus Ouest | Valls A.,University of British Columbia | Francour P.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory
Marine Ecology Progress Series | Year: 2014

Mass-balance trophic models (Ecopath and EcoTroph) are valuable tools that can be used to describe ecosystem structure and functioning, identify target species to be monitored, and allow comparisons of ecosystem states under different management options. Nevertheless, the Ecopath modelling approach is constrained by 2 major sources of uncertainty: model complexity and input data quality. We developed an approach for identifying the optimum model structure that considers trade-offs between feasibility, complexity, and uncertainty, using a Mediterranean coastal ecosystem as a case study. We began with an existing well-documented and good-quality foodweb model comprising 41 functional groups at Port-Cros National Park, France. Based on this model, we assessed the effects of different aggregation choices, driven by a simplification of sampling effort, on the Ecopath and EcoTroph model outputs. We identified the functional groups in which imprecise biomass input significantly influenced the foodweb model, and measured the relative effects on the ecosystem trophic structure and ecosystem maturity and complexity indices. A simplified model comprising 32 functional groups was identified as the best compromise between model complexity and reliability. High trophic level predators, abundant primary producers, and groups with a high biomass and/or diversified diet significantly influenced the model structure. We concluded that the collection of local and accurate biomass data, especially for the most influential functional groups we identified, should be a priority when developing foodweb models for similar ecosystems. Our method enables simplified and standardized models, while considering both the feasibility and reliability of the Ecopath and EcoTroph applications for Mediterranean coastal ecosystems. © Inter-Research 2014


Mamindy-Pajany Y.,University of Nice Sophia Antipolis | Mamindy-Pajany Y.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory | Geret F.,Jean-François Champollion University Center for Teaching and Research | Romeo M.,CNRS Ecology of Marine Ecosystems and Responses to Stress Laboratory | And 2 more authors.
Chemosphere | Year: 2012

The aim of this work is to assess the potential ecotoxicological effects of contaminated sediments treated with mineral additives. The Microtox solid phase test was used to evaluate the effect of mineral additives on the toxicity of sediment suspensions. Four Mediterranean port sediments were studied after dredging and bioremediation: Sample A from navy harbor, sample B from commercial port and samples C and D from pleasure ports. Sediment samples were stabilized with three mineral additives: hematite, zero-valent iron and zeolite. Results show that all studied mineral additives can act as stabilizer agent in highly contaminated sediments (A and C) by decreasing dissolved metal concentrations and sediment toxicity level. On the contrary, for the less contaminated samples (B and D) hematite and zeolite can provoke toxic effect towards Vibrio fischeri since additive particles can favor bacteria retention and decrease bioluminescence emission. © 2011 Elsevier Ltd.

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