cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17882/58038
title: Marine growth effects on the hydrodynamical forces of a circular cylinder

description: An experimental database has been obtained in order to quantify the hydrodynamical drag and added-mass coefficients of a circular cylinder encrusted with rigid and large-size biofouling, such as coral. The tests have been carried out in the wave and current flume tank of IFREMER in Boulogne-sur-mer. The experimental working section is 4m wide by 2m deep and 18m long. The range of the upstream flow velocity used for these trials is between 0.15 and 1.55m/s, with a turbulence rate of 3%. The experimental set-up consists of a 2 meters long cylinder supported by a frame, fixed under a motion generator system, by the use of a six-components load-cell, in order to measure the global forces on the assembly. The motion generator system is used to impose sinusoidal motions to the cylinder, fixed to the frame by the use of six-components load-cells at each extremity, in order to measure the forces only on the cylinder. Two different kinds of biofouling are studied and compared to a reference cylinder of 200mm diameter. Trials have been carried out with current only, with imposed motions and with a combination of imposed motions and current. Results presented in the paper Effet des concrétions marines sur le comportement hydrodynamique de structures circulaires (Journées de l'Hydrodynamique, 2014) show that the hydrodynamic coefficients are from 1.5 to 4 times higher than those obtained for the reference cylinder. Differences between the two tested kinds of roughness are low and limited to the highest speeds and accelerations of motions.
DOI: 10.17882/58034
title: Seasonal and plant-part isotopic and biochemical variation in Posidonia oceanica

description: This dataset gathers biochemical and isotopic ratios measured seasonally in different plant-part of Posidonia oceanica shoots collected in the bay of Marseilles. Values are triplicated measurement of the same samples, but for ashes, that were determined once only. Plant parts were separated based on the classification of Giraud (1979): juvenile (less than 5 cm long, with intact leaf tip), intermediate (more than 5 cm and without basal sheath) and adult (more than 5 cm, with a basal sheath). Adult leaves were subsequently separated between the basal green part without the sheath (photosynthetically active, hereafter adult leaf) and the apical brown section (senescent leaf). In addition, dead P. oceanica leaves drifting away were collected at random close to the meadow, to investigate the ultimate evolution of isotopic and biochemical parameters of the P. oceanica leaves.
DOI: 10.17882/57901
title: Historical Observations of Algal Blooms in Mazatlan Bay, Sinaloa, Mexico (1979-2014)

description: A 35-year record of algal blooms in Mazatlan Bay is reviewed in order to register bloom-forming species, their seasonal presence, duration, degree of toxicity and environmental impact. 202 algal blooms have been recorded and 25 dominant species identified: 6 toxic, 5 harmful and 14 harmless species. A harmless species, Myrionecta rubra, tended to decrease in frequency, while toxic species Gymnodinium catenatum and Cochlodinium polykrikoides show a clear trend towards an increase in frequency. The discoloration days attributable to blooms are highly variable in each year, but a decadal analysis revealed a tendency to increase, except in the last half decade. The monthly distribution of algal blooms for decades show two peaks of high frequency, the larger from February to May and the smaller from September to November. The duration of blooms varies from a few days to more than three months; the ephemeral are most frequent, but in the last decade the frequency of the longer-lasting blooms has increased. An absence of blooms in 1983-4 and 1992-3 coincided with strong El Niño events, but this pattern was not consistent in subsequent El Niño years. Years with more or less discolorations days appear to be associated with cold or warm phases of the Pacific Decadal Oscillation.
DOI: 10.17882/57744
title: ESROB, mooring time series since 1999

description: A surface mooring named the East Sea Real-time Ocean Buoy (ESROB) has been operated since 1999 off the mid-east coast of Korea. The ESROB is located 9 km off the coast (37° 32.24’N; 129° 12.92’E) in a water depth of 130 m providing meteorological and oceanographic (physical and biogeochemical) data every 10 minutes from sensors such as Conductivity-Temperature-Depth (CTD) and acoustic Doppler current profiler (ADCP) instruments. The data provided here are quality controlled and quality assured via typical data processing methods. The data have been used to address seasonal and interannual variations in currents, wind-and tide-induced internal waves, and physical and biological water properties (see related publications noted on this web page). The uploaded data files contain variables in NetCDF format that are obtained during each deployment.
DOI: 10.17882/57739
title: Near-inertial wave trapping near the base of an anticyclonic mesoscale eddy

description: This dataset contains CTD and SADCP data acquired in September 2014 during the oceanographic PUMP survey. The main goal of the experiment was to test, by means of high-resolution field observations, if under non-extraordinary wind forcing conditions, an open-ocean mesoscale anticyclonic eddy can trap NIWs and thus provide energy for deep turbulent mixing
DOI: 10.17882/57450
title: Towing and circulating tanks tidal energy converter test results

description: A comparative "Round Robin" testing program has been conducted as part of the EC FP VII MaRINET program in order to evaluate the impact of different experimental facilities on the test results. The aim of the trials was to test the same model tidal turbine in four different test facilities to explore the sensitivity of the results to the choice of facility. The facilities used in the testing program include two towing tanks, at CNR-INSEAN (Rome, 220 m long) and at Strathclyde University (Glasgow, 76 m long), and two recirculating tanks at CNR-INSEAN (Rome) and at IFREMER (Boulogne sur mer). The model consists of a three-bladed horizontal axis turbine, which is D=0.7m in diameter. The rotor is connected to a motor-gearbox assembly consisting of a gearbox, a DC motor, a ballast load and a motor speed control unit, providing an active rotor speed control. The turbine blades are designed from a NACA 63-418 profile. A torque meter is placed between the rotor and the gearbox for torque measurements. The forces and moments acting on the structure are obtained by means of a six-component load cell, which measures the three force components and the three moment components and the torque by a torque sensor directly fixed between the rotor and the motor. All signals coming from the load-cell, the torque-meter and the motor are recorded synchronously at a sample frequency of 100Hz. In each tank, the turbine depth is kept constant at 1 m under the free surface. The turbine is fixed on a moving carriage in the towing tanks and on a customised mounting in the flume tanks. The flow velocity or carriage velocity is chosen and fixed for each set of tests; the turbine rotation speed is then varied to adjust the tip speed ratio. The rotational speed is measured and controlled for each measurement point, but is adjusted manually.
DOI: 10.17882/57249
title: Food web structure of a mediterranean coralligenous ecosystem

description: This dataset gather isotope composition measured on organisms collected in Cap Caveau (Marseille, France) by SCUBA diving between 30 and 40 m depth from October to December 2015. A total of 78 compartments were analysed (76 taxa, POM and SOM). For each compartment or taxon, mean δ13C and δ15N values were calculated from 3 to 6 replicates. Isotope compositions are expressed in parts per thousand (‰) according to the equation: δX = [(Rsample/Rstandard) – 1] x 10^3, where X is 13C or 15N and R is the isotope ratio 13C/12C or 15N/14N, respectively
DOI: 10.17882/57184
title: Littorina littorea shell lengths from Strangford Lough, Northern Ireland

description: Littorina littorea (L.) were collected from a number of shores around Strangford Lough in Northern Ireland between 2004 and 2006. The length of each shell (cm) was measured with callipers. The basic unit of survey was a vertical transect, approximately 30 m wide, covering the vertical range of L. littorea on the shore. A surveyed site may contain up to two separate transects. Snails were collected using 0.25 m2 quadrats thrown haphazardly on the shore. These were stratified in three horizontal bands, with 8 quadrats in each band. On some shores the lower shore was muddy and no littorinids were found. In these cases, data were only collected from the areas where L. littorea were found and fewer quadrats were thrown. Length data are given for each transect in the file 'Shell lengths by transect'. Information on the associated shore, subsite code, year and number of quadrats thrown are in the 'Transect details' file.
DOI: 10.17882/57113
title: Long-term and high-resolution time series datasets of vent species abundance from the Grotto hydrothermal edifice (Main Endeavour Field, Juan de Fuca Ridge)

description: Focused on vent ecology, the TEMPO-mini ecological observatory module is deployed on the active Grotto hydrothermal edifice (Main Endeavour Field, Juan de Fuca Ridge), selected as a target site for the deep-sea cabled observatory Ocean Networks Canada. To study long-term temporal dynamics of vent communities, the camera was programmed to record 20-min video sequences six times a day (02.00, 06.00, 10.00, 14.00, 18.00 and 22.00 UTC) with three zoom levels per sequence corresponding to ‘large’, ‘medium’ and ‘fine’ views. The camera was focused on a Ridgeia piscesae tubeworm assemblage harbouring a dense community of associated fauna. Temporal variation in the observed abundances of four visible taxa (Ammotheidae pycnogonids, Polynoidae polychaetes, Buccinidae gastropods and Zoarcidae eelpouts) was quantified using the large and medium views (see Figure). To avoid ‘observer bias’ among consecutive measurements, video sequences were analysed in random order. The first observation strategy had a fixed daily observation time set at 10.00 UTC encompassing two years from 20 June 2013 to 20 June 2015. The second observation strategy was designed to identify seasonal components of macrofaunal and environmental variability. All six observations (observation frequency of TEMPO-mini) were analysed during one summer (June 2014) and three winters (November 2014, December 2014 and January 2015) months. These specific time windows were selected to minimize the amount of missing data generated by temporary shortcomings of the observatory and to maximize the presence of high-quality video imagery. Details on these observation methods and analyses conducted on a part of these datasets are published in Lelièvre et al. 2017 (DOI:10.1098/rspb.2016.2123).
DOI: 10.17882/57040
title: Hellenic Trench AIS data

description: The Mediterranean sperm whale population is listed as ‘Endangered”. The Hellenic Trench is the core habitat of the eastern Mediterranean sperm whale sub-population that numbers two to three hundred individuals. Major shipping routes running on or very close to the 1000 m depth contour along the Hellenic Trench are causing an unsustainable number of ship-strikes with sperm whales reviewed in this paper. Sperm whale sighting and density data were combined with specific information on the vessel traffic in the area (e.g., types of vessels, traffic patterns, speed and traffic density), in order to estimate the risk of a whale/ship interaction. Routing options to significantly reduce ship strike risk by a small offshore shift in shipping routes were identified. The overall collision risk for sperm whales in the study area would be reduced by around 70%, while a maximum of 11 nautical miles would be added to major routes and only around 5 nautical miles for the majority of ships. No negative impacts were associated with re-routing by shipping away from sperm whale habitat and there would be additional shipping safety and environmental benefits. A significant contribution to the overall conservation status of the marine Natura2000 sites in the area and very important population units of threatened species such as Cuvier’s beaked whales, monk seals and loggerhead turtles would be achieved, by the reduction of shipping noise and reduced risk of any oil spills reaching the coasts, which are also important touristic destinations in Greece. CSV file contains the following headings : - MMSI Maritime Mobile Service Identity - SHIPTYPE Type of vessel - STATUS NavigationalStatus - SPEED Speed over ground (knots * 10) - COURSE Course over ground - HEADING Heading - LON Longitude - LAT Latitude - TIMESTAMP_UTC Date and Time - STATION Satellite or Terrestrial
DOI: 10.17882/57004
title: Foraminiferal communities from three stations on the French Mediterranean coast to test density separation methods

description: The data present foraminiferal counts from three stations sampled between the 2nd and the 8th April 2015. These data were collected as part of the Water Framework Directive (WFD) survey on the French Mediterranean coast (DCE4-1 campaign). The primary use of these foraminiferal data is to evaluate the environmental quality of coastal environment of the French Mediterranean coast. More particularly these data were used to test the efficiency of density separation methods to extract foraminifera from sandy samples in biomonitoring studies. A Reineck box-corer was used to sampled surface sediment and at each station three replicates were taken (i.e., different box-corer launch). Each replicate was sub-cored (7.45 cm diameter) and the top 0-1 centimetre was stained with Rose Bengal at 2 g.L-1 and preserved in 96% ethanol. In the laboratory samples were washed through 63, 125, 150, and 500 µm sieves. The 125–150 µm and the 150–500 µm fractions were both split in two with a Folsom wet splitter. Different density separation methods were applied on each split. These density separations were carrying out using different high-density liquids (i.e., TCE: Trichloroethylene; ZC: Zinc Chloride; SPT: Sodium Polytungstate), at different density (i.e., 1.46, 1.7, 2.1, 2.3, and 2.5). In the database, the sample volume corresponds to the total volume of sediment in millilitre before sieving, and the split volume corresponds to the volume of each split in millilitre. See Parent et al. 2018 for a full description of the method.
DOI: 10.17882/56794
title: GETSCh deployment (EGO glider : bonpland) (Mediterranean Sea). JERICO-NEXT TNA

description: The observations of bonpland glider on GETSCh deployment (Mediterranean Sea) are distributed in 4 files: - EGO NetCDF time-series (data, metadata, derived sea water current) - NetCDF profiles extracted from the above time-series - Raw data - JSON metadata used by the decoder The following parameters are provided : - Concentration of coloured dissolved organic matter in sea water - Chlorophyll-A signal from fluorescence sensor - Particle backscattering at 700 nanometers - Temperature, conductivity and pressure - Dissolved Oxygen
DOI: 10.17882/56730
title: Predicting Phyllaplysia taylori (Anaspidea: Aplysiidae) presence in Northeastern Pacific estuaries to facilitate grazer community inclusion in eelgrass restoration

description: Estuarine biodiversity is impacted by climate change and anthropogenic use due to the high productivity of estuarine ecosystems and convenient human use of nearshore areas. Human use of estuaries (e.g. with dredging, filling, and invasive species introductions) has decimated subtidal and marsh ecosystems, thus making them the focus of major restoration efforts. Submerged aquatic vegetation (SAV) such as eelgrass beds, and their associated communities, fall under these restoration efforts, especially in San Francisco Bay. Diverse eelgrass communities that include grazers, such as Phyllaplysia taylori, have been shown to maintain eelgrass health and promote increased biodiversity. This study addresses the need for simple, predictive models based on field data for use in SAV restoration that incorporates grazer diversity. Predictive models with ecological, abiotic, and landscape variables were generated that explained the presence of P. taylori in eelgrass beds along the coast of the western United States and seasonal patterns in population density. While surprising, the exclusion of abiotic factors in presence/absence model selection suggested that non-point source runoff promotes P. taylori populations via increased food and turbidity, resulting in decreased predation. P. taylori presence within eelgrass beds was best predicted by the positive impacts of nearshore irrigated land, vegetated land, and bare soil land. P. taylori abundance over time within one site was best described by the positive effects of eelgrass density and eelgrass length and the negative effects of epiphytic coverage and average temperature. These models were used to predict habitat suitability for P. taylori in seventeen San Francisco Bay eelgrass restoration areas in various phases of completion, indicating a 53% P. taylori success rate. Incorporating population persistence knowledge from the SAV-associated invertebrate perspective is a step towards grazer community-minded restoration tactics.
DOI: 10.17882/56675
title: Biological and physico-chemical dataset from different fishponds systems related to IMTA : fish, water and sediment

description: The data were collected from experimental freshwater fishpond systems (extensive, semi-intensive and semi-intensive coupled with lagoon). The dataset presented is composed of: - Individual Fish parameters (live weight, length at fork) at stocking and harvest for the three species reared: common carp (Cyprinus carpio), roach (Rutilus rutilus) and tench (Tinca tinca). - Physical indicators of the water quality in pond, monthly measured :temperature, pH, conductivity, dissolved oxygen, oxygen saturation and water transparency - Physical indicators of the water quality in pond, measured every 5 minutes on 24h in September 2014: temperature, pH, oxydo-reduction potential, conductivity, dissolved oxygen and oxygen saturation. - Concentration in pond water of chemical compounds , monthly sampled :total nitrogen (TN), ammonium, nitrite, nitrate, orthophosphate and total phosphorus(TP) - Concentration in pond water of chemical compounds, sampled 5 minutes on 24h in September 2014: TN, ammonium, nitrate, orthophosphate, TP - Concentration of chlorophyll in pond water monthly sampled: chlorophyll-a from March to June and total chlorophyll, blue chlorophyll, green chlorophyll and brown chlorophyll from July to November. - Concentration in TN and TP in the sediment of each pond at fish stocking and harvest.
DOI: 10.17882/56667
title: Sensitivity study of the Nordic and Barents Seas Atlantis model

description: The dataset was created for exploring the sensitivity of nine key species to four key parameters within the Atlantis framework of the Nordic and Barents Sea. Each simulation is 55 years long, including a 24 year spin-up time, and are all run without fisheries and climatic forcing, to exclude any variance coming from other sources than the parameter perturbations. The dataset includes one control run, and 104 parameter perturbations runs. Key species includes minke whales, northeast arctic cod, Norwegian spring spawning herring, polar cod, capelin, large, medium and small zooplankton and jellyfish. For each of these groups, key life history parameters such as growth rate, consumption rate, mortality rate and recruitment is changed, either as a one-at-a-time perturbation or as a combination of several parameters. The dataset includes biomass information for each of the 52 components of the model, such that both component response and system-level impact can be traced through all parameter perturbations.
DOI: 10.17882/56629
title: Wide-angle seismic data from the Antithesis experiment, Lesser Antilles

description: Ocean-bottom seismometer data from four wide-angle seismic profiles shot during the Antithesis experiment in the Lesser Antilles onboard R/V L’Atalante in 2013.
DOI: 10.17882/56510
title: Balistes capriscus and Lutjanus campechanus: Tissue stable isotopes and gut contents

description: The feeding ecology of two reef fishes associated with artificial reefs in the northwest Gulf of Mexico (GoM) was examined using gut contents and natural stable isotopes. Reefs were divided into three regions (east, central, west) across an east to west gradient of increasing reef complexity and salinity. Gray triggerfish (Balistes capriscus) primarily consumed reef-associated prey (xanthid crabs, bivalves, barnacles) and pelagic gastropods, while red snapper (Lutjanus campechanus) diets were mainly comprised of non-reef prey (stomatopods, fishes, portunid crabs). Natural stable isotopes of carbon (d13C), nitrogen (d15N), and sulfur (d34S) were measured in consumer muscle tissue as well as potential primary producers. Gray triggerfish occupied a lower trophic position than red snapper, with lower d13C and d15N values across all size classes and regions, and generally higher d34S values. Red snapper had a smaller range of stable isotope values and corrected standard ellipse areas across all size classes and regions, indicating a smaller isotopic niche. Contribution estimates of particulate organic matter (26 to 54 %) and benthic microalgae (BMA, 47 to 74 %) for both species were similar, with BMA contributions greater across all three size classes (juveniles, sub-adults, adults) of red snapper and all but the juvenile size class for gray triggerfish. Species gut contents and stable isotopes differed by region, with fishes consuming more crabs in the east region and more gastropods in the central and west regions. d13C and d15N values generally decreased from east to west, while d34S increased across this gradient. Results highlight species-specific feeding differences associated with artificial reefs, where gray triggerfish may be more dependent on the reef structure for foraging opportunities. In addition, results offer further information on the integral role of BMA in primary production at nearshore artificial reefs.
DOI: 10.17882/56438
title: Seasonal variation in the diet of estuarine bivalves

description: Estuarine food webs are generally considered to be supported by marine pelagic and benthic primary producers and by the import of dead organic matter from the open sea. Although estuaries receive considerable amounts of freshwater phytoplankton and organic compounds from adjacent rivers, the potential contribution of these living and dead matter to estuarine food webs is often assumed to be negligible and, therefore, not examined. Based on stable isotope analyses, we report the importance of freshwater suspended particulate organic matter (FW-SPOM) for fuelling estuarine food webs in comparison to estuarine SPOM and microphytobenthos. On average throughout the year, this so-far neglected food source appeared to have contributed 50 %-60 % to the food intake of suspension-feeding bivalves such as cockles (Cerastoderma edule), mussels (Mytilus edulis) and pacific oysters (Magallana gigas) at the Balgzand tidal flats, an estuarine site in the western Wadden Sea (12-32 psu). For these species, this proportion was particularly high in autumn during strong run-off of SPOM-rich freshwater, whilst estuarine SPOM (20 %-25 %) and microphytobenthos (15 %-30 %) were relatively important in summer when the freshwater run-off was very low. These findings have implications for our understanding of the trophic interactions within coastal food webs and for freshwater management of estuarine ecosystems.