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  • 1
    Keywords: Programme national environnement côtier (France). ; Coastal ecology -- France. ; Environmental monitoring -- France. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (314 pages)
    Edition: 1st ed.
    ISBN: 9782759202645
    Series Statement: Bilans and Prospectives Series
    Language: English
    Note: Intro -- Contents -- Foreword -- Overall presentation -- Introduction -- Eight worksites -- Eastern Channel and Southern Bight of the North Sea worksite -- Bay of Seine worksite -- Bay of Mont-Saint-Michel worksite -- Bay of Biscay worksite -- Gulf of Lion worksite -- Mediterranean lagoons worksite -- New Caledonia lagoons worksite -- French Guiana worksite -- Seven topic research actions (TRA) -- TRA 1. Biogeochemical cycles in temperate and tropical coastal environments since the last climatic cycle -- TRA 2. Population dynamics: hydrodynamic structures and biological cycles -- TRA 3. Toxic or harmful algal blooms -- TRA 4. Effect of hydroclimatic factors on the variability of ecosystems in the coastal environment -- TRA 5. Microorganisms and the coastal environment -- TRA 6. Dynamic equilibrium in the coastal zone -- TRA 7. Sediment dynamics -- The PNEC organization in 2002 -- Presentation generate -- Introduction -- Huit chantiers -- Chantier Manche orientale - sud de la mer du Nord -- Chantier baie de Seine -- Chantier baie du Mont-Saint-Michel -- Chantier golfe de Gascogne -- Chantier golfe du Lion -- Chantier lagunes mediterranéennes -- Chantier Nouvelle-Caledonie -- Chantier Guyane -- Sept actions de recherche thematiques (ART) -- ART 1. Cycles biogeochimiques dans les environnements cotiers temperes et depuis le dernier cycle climatique -- ART 2. Dynamique de populations: structures hydrodynamiques et cycles biologiques -- ART 3. Efflorescences algales toxiques ou nuisibles -- ART 4. Effets des facteurs hydroclimatiques sur la variabilite des ecosystemes en environnement cotier -- ART 5. Microorganismes et environnement cotier -- ART 6. Gouvernance environnementale et patrimoine cotier -- ART 7. Dynamique sedimentaire -- Chapter I - Bay of Seine worksite -- General presentation -- Scientific programme -- Participants -- Data banking. , Main results -- Water column -- Conclusion and perspectives -- Chapter II - Bay of Biscay worksite -- General presentation -- Participants and projects -- Main results -- A better knowledge of hydrodynamism and water masses evolutions -- Expertise and services for other disciplines -- The river plumes and their consequences -- Coastal upwellings, accores and a paradoxical central area -- The limits of simultaneous observation of hydrological structures and distribution of pelagic fishes -- Structure of the benthic communities and foodweb analysis -- Towards a better understanding of time evolution of harvested species -- Chapter III - Gulf of Lion worksite -- General presentation -- Scientific programme -- Main results -- The Rhone river and the plume -- Circulation and distribution of elements at mesoscale -- Pelagic production and vertical fluxes -- Benthic response and exchanges at the water-sediment interface -- Global budgets of matter -- Annexes -- Chapter IV - Mediterranean lagoons worksite -- General presentation -- Context and objectives of the "Mediterranean lagoons" worksite -- Main results -- A dynamic ecosystem -- A productive ecosystem -- A man-affected ecosystem -- Annex -- Perspective: a Mediterranean lagoons worksite phase II -- Main objective -- Workgroups and associated projects -- Collaborations -- Chapter V - New Caledonia worksite -- General presentation -- Study site and implementation -- Participants -- Main results -- Action 1 - Circulation and transport of terrigeneous and anthropogenic inputs -- Action 2 - Biogeochemical functioning of the lagoon system -- Action 3 - Transfer of metals through the benthic trophic food chain -- Action 4 - Growth variations of lagoon organisms -- Action 5 - Indicators of reef-lagoon environment and resource status -- Chapter VI - French Guiana worksite -- General presentation. , Scientific programme -- Participants -- Main results -- Theme 1. Sedimentology and transport of Amazonian sediment -- Theme 2. Continental shelf -- Theme 3. Mudflat and mangroves -- Theme 4. Relationships between resources and their environment -- Chapter VII - Bay of Mont-Saint-Michel worksite -- General presentation -- Scientific programme -- Theme 1: Trophic capacity -- Scientific programme -- Main activities and progress in 2002 -- Pelagic production -- Benthic production -- Secondary consumers -- Trophic transfers -- Theme 2: Dispersal, benthic populations structure and anthropogenic disturbances -- Scientific programme -- Main activities -- Preliminary results -- Hydrosedimentary: a common tool to the themes 1 and 2 -- Scientific programme -- Main operations -- Progress report and preliminary results -- Economic valuation and sociological analysis -- Economic valuation: human activities and natural assets management -- Sociological analysis: appropriation of the littoral areas by the mussels farmers -- Annexes -- Chapter VIII - Eastern English Channel and South Bay of the North Sea worksite -- General presentation -- Scientific programme 2002-2005 -- Activities in 2002 (year 0) -- Recommendations from the scientific council -- Chapter IX - Topic Research Action 1 -- General presentation -- Requests for proposals 1999 -- Requests for proposals 2000 -- Requests for proposals 2001 -- Requests for proposals 2002 -- Main results -- Subjects treated -- Dynamics of the BBL -- Benthic primary productivity and variations with high frequency -- Reef environments -- Shortcomings -- Main axis: MICROBENT core project -- Perspectives -- Chapter X - Topic Research Action 2 -- General presentation -- Objectives -- Rationale -- Participants -- Main results. , Project 1. Studies on population dynamics of benthic organisms with planktonic larvae in coastal environments, with focuses on physics-biology coupling and species interactions -- Project 2. Pelagic fish recruitment dynamics and ecosystem interactions in the southern Benguela: a modelling approach -- Project 3. Demography and diversity of coastal pelagic zooplankton and responses to physical forcing -- Chapter XI - Topic Research Action 3 -- General presentation -- The 2002 call for proposal -- Results of the proposal -- Participants -- Main results -- Taxonomy and distribution of toxic or harmful species along the French coasts -- Detection of toxic species of Pseudo-nitzschia -- A review on ciguatera -- Differential expression of surface proteins in toxic and non-toxic strains of Alexandium species. Preparation of cell surface antibodies for the detection of Alexandrium species -- Determinism of phytoplankton blooms in Mediterranean lagoons. The case of toxic species -- The effects of different nitrogen sources (mineral or organic) on Alexandrium tamarense/catenella, species responsible for toxic blooms in a Mediterranean lagoon -- Contamination kinetics of mussels by Dinophysis -- Modelling for bivalve contamination by Alexandrium spp. toxins -- Study of the competition between species during the development of a toxic efflorescence of Alexandrium minutum -- Perspective -- Chapter XII - Topic Research Action 4 -- General presentation -- Objectives -- Coordination/events -- 2002 Projects -- typology of data, questions, methods -- Main results -- Case studies -- Case study 1. Reorganisation of North Atlantic marine copepod biodiversity and climate -- Case study 2. Automatic recognition of mesoscale hydrodynamical structures -- Case study 3. PASTECS: Package for of space-time ecological series -- Perspectives. , Chapter XIII - Topic Research Action 5 -- General presentation -- General background - state of art -- Researches covered by TRA 5 in years 2000 to 2002 -- Main results -- Projects in the field of functional ecology -- Projects in the field of sanitary microbiology -- Animation of TRA 5 -- Relations Worksites - TRA 5 -- Conclusion -- Perspectives -- Chapter XIV - Topic Research Action 6 -- General presentation -- Project 1. Economic analysis of oil spills at sea: damage valuation and the role of economic incentives in spill prevention -- Project 2. Fishing and recreational activities in an area to be protected: the case of the Iroise Sea national marine park project (France) -- Project 3. Vulnerability of coastal evaluation, stake-holders and public policies -- Project 4. Territory for one, territory for another -- Project 5. Study of coastal area occupation strategies: the case of shellfish concession -- Project 6. Efficiency of policy instruments for managing water pumping in coastal aquifer: an experimental approach -- Interdisciplinary workshop -- Organization -- Outputs -- Contribution of social sciences to others PNEC operations -- Perspective -- Chapter XV - Topic Research Action 7 -- General presentation -- Introduction -- Field observations -- Laboratory experiments -- Numerical modelling -- Main results -- Sete site -- Truc Vert site -- Omaha beach site -- Laboratory -- Innovative measurement techniques -- Conclusion & -- perspectives -- Chapter XVI - Assessment and prospective -- Introduction -- General objectives -- Research themes -- Topic 1 - Climatic and anthropic influences -- Topic 2 - Biodiversity and forcings at the interfaces -- Topic 3 - Exceptional events involving an imbalance of the coastal systems and\or social risks, in particular sanitary ones -- Topic 4 - Littoral public policies and coastal heritage. , Operational structures.
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  • 2
    Book
    Book
    New York, NY [u.a.] : Elsevier
    Keywords: Konferenzschrift
    Type of Medium: Book
    Pages: S. 115 - 273 , Ill., graph. Darst
    Series Statement: Progress in oceanography 72.2007,2/3
    Language: English
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  • 3
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The availability of iron limits primary productivity and the associated uptake of carbon over large areas of the ocean. Iron thus plays an important role in the carbon cycle, and changes in its supply to the surface ocean may have had a significant effect on atmospheric carbon dioxide ...
    Type of Medium: Electronic Resource
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  • 4
    Publication Date: 2017-07-19
    Description: Highlights: • A DEB model for M. leidyi was parameterized using 60 datasets from literature. • 12 °C might already be outside the optimal temperature range. • M. leidyi has high reserve turnover rates and a high structural component. • Delayed metabolic acceleration confers flexibility in controlling generation time. Abstract: Mnemiopsis leidyi is an invasive comb jelly which has successfully established itself in European seas. The species is known to produce spectacular blooms yet it is holoplanktonic and not much is known about its population dynamics in between. One way to gain insight on how M. leidyi might survive between blooms and how it can bloom so fast is to study how the metabolism of this species actually responds to environmental changes in food and temperature over its different life-stages. To this end we combined modelling and data analysis to study the energy budget of M. leidyi over its full life-cycle using Dynamic Energy Budget (DEB) theory and literature data. An analysis of data obtained at temperatures ranging from 8 to 30 °C suggests that the optimum thermal tolerance range of M. leidyi is higher than 12 °C. Furthermore M. leidyi seems to undergo a so-called metabolic acceleration after hatching. Intriguingly, the onset of the acceleration appears to be delayed and the data do not yet exist which allows determining what actually triggers it. It is hypothesised that this delay confers a lot of metabolic flexibility by controlling generation time. We compared the DEB model parameters for this species with those of another holoplanktonic gelatinous zooplankton species (Pelagia noctiluca). After accounting for differences in water content, the comparison shows just how fundamentally different the two energy allocation strategies are. P. noctiluca has an extremely high reserve capacity, low turnover times of reserve compounds and high resistance to shrinking. M. leidyi adopts the opposite strategy: it has a low reserve capacity, high turnover rates of reserve compounds and fast shrinking.
    Type: Article , PeerReviewed
    Format: text
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  • 5
    Publication Date: 2014-05-07
    Type: Conference or Workshop Item , NonPeerReviewed
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  • 6
    Publication Date: 2024-04-18
    Description: Marine particles of different nature are found throughout the global ocean. The term "marine particles" describes detritus aggregates and fecal pellets as well as bacterioplankton, phytoplankton, zooplankton and nekton. Here, we present a global particle size distribution dataset obtained with several Underwater Vision Profiler 5 (UVP5) camera systems. Overall, within the 64 mu m to about 50 mm size range covered by the UVP5, detrital particles are the most abundant component of all marine particles; thus, measurements of the particle size distribution with the UVP5 can yield important information on detrital particle dynamics. During deployment, which is possible down to 6000 m depth, the UVP5 images a volume of about 1 L at a frequency of 6 to 20 Hz. Each image is segmented in real time, and size measurements of particles are automatically stored. All UVP5 units used to generate the dataset presented here were inter-calibrated using a UVP5 high-definition unit as reference. Our consistent particle size distribution dataset contains 8805 vertical profiles collected between 19 June 2008 and 23 November 2020. All major ocean basins, as well as the Mediterranean Sea and the Baltic Sea, were sampled. A total of 19 % of all profiles had a maximum sampling depth shallower than 200 dbar, 38 % sampled at least the upper 1000 dbar depth range and 11 % went down to at least 3000 dbar depth. First analysis of the particle size distribution dataset shows that particle abundance is found to be high at high latitudes and in coastal areas where surface productivity or continental inputs are elevated. The lowest values are found in the deep ocean and in the oceanic gyres. Our dataset should be valuable for more in-depth studies that focus on the analysis of regional, temporal and global patterns of particle size distribution and flux as well as for the development and adjustment of regional and global biogeochemical models. The marine particle size distribution dataset (Kiko et al., 2021) is available at https://doi.org/10.1594/PANGAEA.924375.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
    Format: text
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  • 7
    Publication Date: 2022-01-31
    Description: In this paper we review on the technologies available to make globally quantitative observations of particles, in general, and plankton, in particular, in the world oceans, and for sizes varying from sub-micron to centimeters. Some of these technologies have been available for years while others have only recently emerged. Use of these technologies is critical to improve understanding of the processes that control abundances, distributions and composition of plankton, provide data necessary to constrain and improve ecosystem and biogeochemical models, and forecast changes in marine ecosystems in light of climate change. In this paper we begin by providing the motivation for plankton observations, quantification and diversity qualification on a global scale. We then expand on the state-of-the-art, detailing a variety of relevant and (mostly) mature technologies and measurements, including bulk measurements of plankton, pigment composition, uses of genomic, optical, acoustical methods and analysis using particles counters, flow cytometers and quantitative imaging devices. We follow by highlighting the requirements necessary for a plankton observing system, the approach to achieve it and associated challenges. We conclude with ranked action-item recommendations for the next ten years to move towards our vision of a holistic ocean-wide plankton observing system. Particularly, we suggest to begin with a demonstration project on a GO-SHIP line and/or a long-term observation site and expand from there ensuring that issues associated with methods, observation tools, data analysis, quality assessment and curation are addressed early in the implementation. Global coordination is key for the success of this vision and will bring new insights on processes associated with nutrient regeneration, ocean production, fisheries, and carbon sequestration.
    Type: Article , PeerReviewed
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  • 8
    Publication Date: 2024-02-07
    Description: Zooplankton plays a major role in ocean food webs and biogeochemical cycles, and provides major ecosystem services as a main driver of the biological carbon pump and in sustaining fish communities. Zooplankton is also sensitive to its environment and reacts to its changes. To better understand the importance of zooplankton, and to inform prognostic models that try to represent them, spatially-resolved biomass estimates of key plankton taxa are desirable. In this study we predict, for the first time, the global biomass distribution of 19 zooplankton taxa (1-50 mm Equivalent Spherical Diameter) using observations with the Underwater Vision Profiler 5, a quantitative in situ imaging instrument. After classification of 466,872 organisms from more than 3,549 profiles (0-500 m) obtained between 2008 and 2019 throughout the globe, we estimated their individual biovolumes and converted them to biomass using taxa-specific conversion factors. We then associated these biomass estimates with climatologies of environmental variables (temperature, salinity, oxygen, etc.), to build habitat models using boosted regression trees. The results reveal maximal zooplankton biomass values around 60 degrees N and 55 degrees S as well as minimal values around the oceanic gyres. An increased zooplankton biomass is also predicted for the equator. Global integrated biomass (0-500 m) was estimated at 0.403 PgC. It was largely dominated by Copepoda (35.7%, mostly in polar regions), followed by Eumalacostraca (26.6%) Rhizaria (16.4%, mostly in the intertropical convergence zone). The machine learning approach used here is sensitive to the size of the training set and generates reliable predictions for abundant groups such as Copepoda (R2 approximate to 20-66%) but not for rare ones (Ctenophora, Cnidaria, R2 〈 5%). Still, this study offers a first protocol to estimate global, spatially resolved zooplankton biomass and community composition from in situ imaging observations of individual organisms. The underlying dataset covers a period of 10 years while approaches that rely on net samples utilized datasets gathered since the 1960s. Increased use of digital imaging approaches should enable us to obtain zooplankton biomass distribution estimates at basin to global scales in shorter time frames in the future.
    Type: Article , PeerReviewed
    Format: text
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  • 9
    Publication Date: 2024-02-07
    Description: Aim: The distribution of mesoplankton communities has been poorly studied at global scale, especially from in situ instruments. This study aims to (1) describe the global distribution of mesoplankton communities in relation to their environment and (2) assess the ability of various environmental-based ocean regionalizations to explain the distribution of these communities. Location: Global ocean, 0–500 m depth. Time Period: 2008–2019. Major Taxa Studied: Twenty-eight groups of large mesoplanktonic and macroplanktonic organisms, covering Metazoa, Rhizaria and Cyanobacteria. Methods: From a global data set of 2500 vertical profiles making use of the Underwater Vision Profiler 5 (UVP5), an in situ imaging instrument, we studied the global distribution of large (〉600 μm) mesoplanktonic organisms. Among the 6.8 million imaged objects, 330,000 were large zooplanktonic organisms and phytoplankton colonies, the rest consisting of marine snow particles. Multivariate ordination (PCA) and clustering were used to describe patterns in community composition, while comparison with existing regionalizations was performed with regression methods (RDA). Results: Within the observed size range, epipelagic plankton communities were Trichodesmium-enriched in the intertropical Atlantic, Copepoda-enriched at high latitudes and in upwelling areas, and Rhizaria-enriched in oligotrophic areas. In the mesopelagic layer, Copepoda-enriched communities were also found at high latitudes and in the Atlantic Ocean, while Rhizaria-enriched communities prevailed in the Peruvian upwelling system and a few mixed communities were found elsewhere. The comparison between the distribution of these communities and a set of existing regionalizations of the ocean suggested that the structure of plankton communities described above is mostly driven by basin-level environmental conditions. Main Conclusions: In both layers, three types of plankton communities emerged and seemed to be mostly driven by regional environmental conditions. This work sheds light on the role not only of metazoans, but also of unexpected large protists and cyanobacteria in structuring large mesoplankton communities.
    Type: Article , PeerReviewed , info:eu-repo/semantics/article
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  • 10
    Publication Date: 2023-08-08
    Description: Aim: The distribution of mesoplankton communities has been poorly studied at global scale, especially from in situ instruments. This study aims to (1) describe the global distribution of mesoplankton communities in relation to their environment and (2) as-sess the ability of various environmental- based ocean regionalizations to explain the distribution of these communities. Location: Global ocean, 0–500 m depth. Time Period: 2008–2019. Major Taxa Studied: Twenty-eight groups of large mesoplanktonic and macroplank-tonic organisms, covering Metazoa, Rhizaria and Cyanobacteria. Methods: From a global data set of 2500 vertical profiles making use of the Underwater Vision Profiler 5 (UVP5), an in situ imaging instrument, we studied the global distribu-tion of large (〉600 μm) mesoplanktonic organisms. Among the 6.8 million imaged ob-jects, 330,000 were large zooplanktonic organisms and phytoplankton colonies, the rest consisting of marine snow particles. Multivariate ordination (PCA) and clustering were used to describe patterns in community composition, while comparison with existing regionalizations was performed with regression methods (RDA). Results: Within the observed size range, epipelagic plankton communities were Trichodesmium- enriched in the intertropical Atlantic, Copepoda- enriched at high latitudes and in upwelling areas, and Rhizaria-enriched in oligotrophic areas. In the mesopelagic layer, Copepoda-enriched communities were also found at high lati-tudes and in the Atlantic Ocean, while Rhizaria-enriched communities prevailed in the Peruvian upwelling system and a few mixed communities were found elsewhere. The comparison between the distribution of these communities and a set of existing regionalizations of the ocean suggested that the structure of plankton communities described above is mostly driven by basin- level environmental conditions. Main Conclusions: In both layers, three types of plankton communities emerged and seemed to be mostly driven by regional environmental conditions. This work sheds light on the role not only of metazoans, but also of unexpected large protists and cy-anobacteria in structuring large mesoplankton communities.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
    Format: application/pdf
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