cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.17882/70660
title: Linking Danube River Activity to Alpine Ice-Sheet Fluctuations during the Last Glacial (ca. 33-17 ka BP): insights into the continental signature of Heinrich Stadials

description: Offshore archives retrieved from marine/lacustrine environments receiving sediment from large river systems are valuable Quaternary continental records. In the present study, we reconstruct the Danube River activity at the end of the last glacial period based on sedimentological, mineralogical and geochemical analyses performed on long-piston cores from the north-west Black Sea margin. Our data suggest that the Danube River produced hyperpycnal floods throughout the ca. 33-17 ka period. Four main periods of enhanced Danube flood frequency, each of 1.5-3 kyr duration, are recorded at ca. 32.5-30.5 ka (equivalent to the first part of Heinrich Stadial -HS- 3), at ca. 29-27.5 ka (equivalent to Greenland Stadial 4), at ca. 25.3-23.8 ka (equivalent to HS 2) and at ca. 22.3-19 ka. Based on mineralogical and geochemical data, we relate these events to enhanced surface melting of the Alpine Ice Sheet (AIS) that covered ~50,000 km² of the Danube watershed at the Last Glacial Maximum (LGM). Our results suggest that (i) the AIS growth from the inner Alps to its LGM position in the northern Alpine foreland started from ca. 30.5 ka, ended no later than ca. 25.3 ka, and was interrupted by a melting episode ca. 29-27.5 ka; (ii) the AIS volume drastically decreased from ca. 22.3 to 19 ka, as soon as summer insolation energy at the AIS latitude increased; and (iii) HSs strongly impacted the AIS mass balance through enhanced summer surface melt. This, together with evidence of severely cool winters and the rapid expansion of sea ice in the North Atlantic, implies strong seasonality in continental Europe during stadials.
DOI: 10.17882/70649
title: A global dataset on the fuzzy scored biological traits of mudflat macrofaunal assemblages

description: Mudflats—unvegetated, soft-sediment, intertidal habitats—support macrofaunal assemblages that contribute to a number of important ecosystem functions (e.g. food for fish and birds, nutrient and C-cycling). These habitats are widespread but are threatened by increasing pressure from anthropogenic activities. Greater knowledge of the consequences of biodiversity loss for the functioning of ecosystems can aid management, by identifying potential threats. Systematic searches of the Web of Science and SCOPUS identified 163 published datasets of essentially ‘pristine’ mudflat macrofaunal assemblages, comprising data on 448 taxa from 4 climatic zones and 10 biogeographic regions. Biological traits analysis was used to quantify the potential contribution of taxa towards the delivery of selected ecosystem functions. Ten morphological, life history and behavioural traits were selected that influenced fundamental mudflat functions mediated by macrofauna. For example, organisms with small body sizes and short life spans may facilitate organic C-cycling, whilst taxa that dwell near the sediment surface are most likely to be consumed by predators. Each of the 10 traits were represented by 3 to 5 subcategories, or modalities; e.g. feeding mode was subdivided into deposit feeder, suspension and filter feeder, predator and/or scavenger, and grazer. The affinity of each taxon to a trait modality was coded using a ‘fuzzy coding’ procedure. The score assigned to each modality (e.g. 0 = species had no affinity to that modality, 1.0 = complete affinity) was such that the scores for a trait summed to 1. When the affinity of a taxon for a modality was unknown, higher taxon level information (e.g. genus &lt; order &lt; class) were used. Broad-scale patterns of trait distribution confirmed established patterns showing that taxa at low latitudes have smaller body sizes, shorter life spans and more taxa have exoskeletons, and that direct developmental modes are more prevalent at high latitudes. Greater occurrences of burrow dwellers in the temperate zone may support greater rates of sediment turnover, organic matter de com position and nutrient cycling, whereas in the tropics, tube dwellers provide more biogenic habitat. Despite these trait differences, the overall similarity in trait composition relative to taxonomic composition indicated that globally, mudflats are functionally similar. The functional redundancy observed across regional and climatic boundaries suggests that ecosystem functioning and service delivery will show some resilience in the face of perturbation. However, the growing anthropogenic pressures on coastal mudflats means the risk of system collapse, beyond resilience thresholds, is high. This study illustrates how an extensive body of published literature can provide a foundation for developing a global understanding of ecological functioning in mudflats to inform management responses.
DOI: 10.17882/70648
title: RADSeq-derived SNP genotypes for 159 thornback ray Raja clavata from the Bay of Biscay

description: We developed a panel of single nucleotide polymorphism (SNP) markers for 159 thornback ray Raja clavata sampled in the Bay of Biscay during the period 2011-2016 using a RADSeq protocol. Demultiplexed sequences were aligned to the genome of Leucoraja erinacea which was used as reference genome. From an initial set of 389 483 putative SNPs, we only retained loci with a calling frequency percentage above 50%, MAF (minor allele frequency) above 0.01 and read depth below 500 to remove spurious SNPs. This resulted in selecting 43 088 SNPs. The genotype data is provided in variant call format (vcf ). Note that contigs contain several SNPs.
DOI: 10.17882/70484
title: Size-fractionated optical backscattering and chlorophyll fluorescence from 34 high-latitude phytoplankton blooms

description: This dataset contains bin-averaged optical particle measurements from Biogeochemical Argo floats. Full description of data and methodology is contained in the manuscript submitted to Science entitled "Particle fragmentation exerts strong control on biological sequestration of CO2 by the oceans". Optical measurements are particulate backscattering and chlorophyll fluorescence, and each have been partitioned into large (&gt;100 µm) and small (&lt;100 µm) size classes for use in estimating the rate of fragmentation of large, sinking partiles. The data cover 34 high-latitude open-ocean mesopelagic sinking particle plumes in the supolar North Atlantic and the Southern Ocean observed at 1 m vertical resolution and 2-5 day temporal resolution by profiling floats over a 30-day period. Each 30-day period is divided into five temporal bins of six days each. Vertical binning is at 50-meter intervals from the 250-950 m.
DOI: 10.17882/70376
title: AMOR-Bflux porewater and sediment data

description: Estuarine regions are generally considered a major source of atmospheric CO2 as a result of the high organic carbon (OC) mineralization rates in their water column and sediments. Yet, the intensity of anaerobic respiration processes in the sediments tempered by the reoxidation of reduced metabolites near the sediment-water interface controls the flux of benthic alkalinity. This alkalinity may partially buffer metabolic CO2 generated by benthic OC respiration in sediments. Thus sediments with high anaerobic respiration rates could contribute less to local acidification than previously thought. In this study, a benthic chamber was deployed in the Rhône River prodelta and the adjacent continental shelf (Gulf of Lions, NW Mediterranean) in late summer to assess the fluxes of total alkalinity (TA) and dissolved inorganic carbon (DIC) from the sediment. Concurrently, in situ O2 and pH microprofiles, voltammetric profiles and pore water composition were measured in surface sediments to identify the main biogeochemical processes controlling the net production of alkalinity in these sediments. Benthic TA and DIC fluxes to the water column, ranging between 14 and 74 mmol m-2 d-1 and 18 and 78 mmol m-2 d-1, respectively, were up to 8 times higher than DOU rates (10.4 ± 0.9 mmol m-2 d-1) close to the river mouth, but their intensity decreased offshore, as a result of the decline in OC inputs. In the zone close to the river mouth, pore water redox species indicated that TA and DIC were mainly produced by microbial sulfate and iron reduction. Despite the complete removal of sulfate from pore waters, dissolved sulfide concentrations were low and significant concentration of FeS were found indicating the precipitation and burial of iron sulfide minerals with an estimated burial flux of 12.5 mmol m-2 d-1 near the river mouth. By preventing reduced iron and sulfide reoxidation, the precipitation and burial of iron sulfide increases the alkalinity release from the sediments during the spring and summer months. Under these conditions, the sediment provides a net source of alkalinity to the bottom waters which mitigates the effect of the benthic DIC flux on the carbonate chemistry of coastal waters and weakens the partial pressure of CO2 increase in the bottom waters that would occur if DIC was produced only.
DOI: 10.17882/70364
title: SAMBA East raw data sets

description: This data set was acquired during SAMBA East experiments which consists in a serie of deployments along 2 main lines : - the SAMBA line along 34° 30' S from 17° 30 ' E to 0° 0'. - the GOODHOPE line orientated NE-SW in a box limited by 35° 15' S, 42°42' S, 14° 05' E et 08° 44' E. Deployments/recoveries were mainly done with SA Agulhas II research vessel (2013, 2014, 2015, 2017) but also RS Algoa (2013, 2019) and RV Polarstern (2018). In addition to DEA/UCT CTD which acquired profiles at / between deployments points, 3 types of moored instruments have been deployed so far during the above mentioned cruises. C/PIES wich stand for Current / Pressure Inverted Echo Sounder are instruments developed and manufactured by University of Rhode Island, USA. PIES are deployed on the ocean floor and measure the vertical acoustic roundtrip travel time from sea bottom to sea surface together with pressure and temperature at the sea floor. CPIES are PIES equipped with an additional currentmeter measuring ocean current 50 m above the PIES. CIAM frames are developed by Laboratoire d'Océanographie Physique et Spatiale (LOPS) to deploy ADCP on the ocean bottom. They can also be equipped with SBE37 to measure PTS. Two of those equipments have been deployed between 2013 and 2017 at 2 different depths of 880 m and 1120 m. To afford measuring current profiles between sea floor and sea surface, different WorkHorse ADCP from Teledyne RDI were used characterised by their transmit frequency respectively of 150 kHz and 75 kHz. The pressure, temperature and salinity measurments at the points of CIAM deployment were achieved with 2 SBE37.
DOI: 10.17882/70325
title: Multi-decadal shifts in fish community diversity across a dynamic biogeographic transition zone

description: Aim: A 21-year fisheries-independent monitoring dataset was used to explore fish community diversity across a latitudinal gradient to quantify how diversity has changed and relate those changes in diversity to changes in the abiotic environment. Additionally, this study spans a biogeographic transition zone, providing insight into future species assemblages across regions of relatively high species diversity. Location: Indian River Lagoon, Florida, USA Methods: Spatial and temporal beta diversity was quantified latitudinally with “best derived breaks” determined by using chronological cluster analyses. Multiple indices of alpha diversity were quantified, including species richness, Shannon diversity, Simpson diversity, and Pielou’s evenness. AIC model selection and environmental fit tests were performed to link patterns of diversity and species assemblages with the abiotic environment. Results: Evidence of a biogeographic transition zone was supported by data spanning the entire study period; the largest break in species assemblage occurred near 28°N. Fine scale analyses using small and large seine catches were noisier than broad analyses but indicated a northern shift in location of the biogeographic transition zone. Beta-diversity was generally dominated by species turnover/balance versus nestedness/gradient components, implying that changes were driven by species sorting associated with the physical environment. Excluding the summation of all environmental variables, temperature and dissolved oxygen best describe patterns of diversity and species composition. Main Conclusions: Over years less affected by disturbances, large and small seine catch data suggest the fish community assemblage and location of the biogeographic transition zone has shifted 9 km and 21 km to the north. If the trends observed in these years were to continue from 1999 until the year 2100, a 111 km to 243 km shift in fish communities could be expected. Variation in rates of movement based on gear type suggest novel species assemblages could ensue.
DOI: 10.17882/70205
title: Unbaited underwater video for observing and monitoring fish communities and habitats in temperate and coral reef ecosystems

description: This video clip presents the unbaited autonomous video techniques STAVIRO and MICADO. They were developped by Ifremer in collaboration with IRD. They have been tested extensively in New Caledonia, in the Indian Ocean and in the Mediterranean. The methodoloy was standardized from data acquisition to assessment and was used to assess the ecological status of fish and habitats in most Marine Protected Areas in New Caledonia during the AMBIO project (2012-2016). It is now also used in other regions of the world including in the NorthEast Atlantic.
DOI: 10.17882/70158
title: Pump-underway ship intake: microplastic concentrations on oceanic and coastal seawaters off the Canary Islands (Subtropical NE Atlantic)

description: We present a dataset obtained from a sampling methodology based on the connection of a microplastic sampling device of our own design to the pump-underway ship intake system of a Research Vessel (RV). The method has been proved cost effective, highly versatile and accurate, and able to sample particles down to 50μm from opportunity platforms, thus contributing to an emerging area of study, and particularly helpful to increase monitoring effort and reported data, and therefore serving as a valuable aid for the implementation of the Marine Strategy Framework Directive (MSFD). Sampling was performed in three consecutive oceanographic campaigns in Subtropical NE Atlantic over a year, repeating the same procedure, retrieving subsurface waters (- 4 m depth) while on navigation and while on coastal and oceanic stations. Microplastic particles were found in the total stations and transects sampled. Fibres (64.42%) were predominant over fragments (35.58%), being the concentration values over the data reported in other areas in the Atlantic.
DOI: 10.17882/70152
title: Dataset of the seasonality of carbonate chemistry in a tropical mangrove lagoon, dataset

description: We investigated the seasonal carbonate chemistry variability within a semi-enclosed tropical mangrove lagoon in southwestern Puerto Rico. Biweekly measurements of seawater temperature, salinity, total alkalinity (TA), and dissolved inorganic carbon (DIC) were conducted from 2014 to 2018. We describe the possible mechanisms driving the observed variability by correlating the DIC/TA ratio with pH and Ωarg, suggesting that the mean pH (7.87 ± 0.09) and aragonite saturation state (Ωarg, 2.96 ± 0.47) of the mangrove lagoon negatively affected calcification. The measured pCO2 and DIC/TA ratios indicate that heterotrophic activity was the primary driver for persistent acidification, which reached its maximum expression during the wet season. We conclude that mangrove lagoons with limited seawater exchange and high carbon input will not mitigate ocean acidification.
DOI: 10.17882/66954
title: Hydrodynamic functioning characterisation of Vairao lagoon

description: Deployments have been conducted from May 2017 to April 2019 in Vairao lagoon (Tahiti, French Polynesia) to characterize its hydrodynamic functionning. First, the study of currents in this area has been made to configure a DEPOMOD model around aquaculture farm TFA (Tahiti Fish Aquaculture). The main objectif was to model the deposition of waste solids from marine cage farm. Then, this hydrodynamic study has been extended to the area of Vairao lagoon.
DOI: 10.17882/62757
title: Biometric data for large pelagic fish in the Indian Ocean

description: Biometric relationships are critical to convert measurement performed at landings (fish with head, tail cut or gutted and gilled) to standardized measurements which can be used in stock assessment and scientific purposes. In the Indian Ocean, while tuna species are relatively well described, there is a critical lack of information for billfish and the interannual and seasonal variations of these relationships are rarely investigated. To cope with this issue, the relationships used at IOTC are coming from other oceans or close species which is not scientifically satisfactory. In this document, we present the biometric relationships for 6 large pelagic species over 267 individuals in 2017 and 2018 from catches of Reunionese longliners. The classical length and weights are established for this species. While the relationships are very neat, further collections are needed to provide robust relationship. This document question our ability to share and build a global biological database at IOTC which can be regularly updated and provided the best scientific knowledge for these relationship. These data could be also used for other scientific needs and could be easily freely accessible as they are not sensitive.
DOI: 10.17882/62732
title: Distance to fishing grounds and crab carapace width: participatory mapping and GPS tracking

description: This data set contains distances to crab fishing grounds generated via participatory mapping and GPS tracking. It also contains crab carapace lengths calculated based on Oliveira (2015).
DOI: 10.17882/62725
title: JERICO TNA Project MultiFluoro - Testing new multi-parameter fluorometer in optically complex environments

description: The project installed a newly developed multi-parameter algal fluorescence sensor (Chelsea Technologies VLux) in the FerryBox system on the ro-ro ferry Finnmaid. Algal fluorescence measurments were taked along the journey through the Baltic sea between Helsinki and Travemunde. The VLux data were compared with several other sensors installed in the FewrryBox system. Further laboratory work was performed to characterise the response of the Chelsea Technologies VLux to various different algal species.
DOI: 10.17882/62691
title: High resolution suspended particulate matter maps generated from landsat-8/OLI and sentinel-2/MSI data in the gironde estuary

description: Gironde estuary environmental parameters and SPM maps generated from 41 Landsat-8/OLI and Sentinel-2/MSI images acquired over the period 2013-2018. Except bathymetry and daily river discharge data, that are accessible on public platforms, the dataset includes all of the time seris used in the publication: Analysis of suspended sediment variability in a large highly-turbid estuary using a 5-year-long remotely-sensed data archive at high resolution, Journal of Geophysical Research: Oceans, DOI:10.1029/2019JC015417.
DOI: 10.17882/62649
title: JERICO-NEXT TNA: Aquatic and air passive sampler dataset from MONICOAST project

description: MONICOAST, developed in the framework of the Horizon 2020 Jerico-Next Transnational Access (TNA) Call, is a collaborative project between the University of Cagliari (UNICA, Italy) and AZTI (Spain), hosted by the Hellenic Centre for Marine Research (HCMR, Greece). In the framework of the project, SSP and LDPE water passive samplers and PUF air passive samplers were deployed, in 2018-2019, at two buoys (Heraklion Coastal Buoy, HCB; Saronikos Buoy, SB), located in the Mediterranean Sea (Greece), for the measurement of organic compounds.
DOI: 10.17882/62635
title: Experimental database of a tidal turbine in a wall-mounted square cylinder wake

description: In high flow velocity areas like those suitable for tidal applications, turbulence intensity is high and flow variations may have a major impact on tidal turbines behaviour. Large boils that can be observed at the sea surface are emitted from the sea floor and may interact with tidal turbines deployed in the area. The turbulent flow and its impact on tidal turbines have then to be characterized. The Reynolds number, based on the rugosity height and mean flow velocity, is rather high in this context: Re=2.5x107. For that purpose, experiments are carried out in a flume tank with Re as high as achievable in Froude similitude (in the tank: Re=2.5x105 and Fr=0.23) in order to study the turbine behaviour placed in the wake of seabed obstacles. The obstacle is here a canonical square wall-mounted cylinder chosen to be representative of specific in situ bathymetric variations. This obstacle produces a very extended wake embedded with large scale turbulent structures. A tri-bladed horizontal axis turbine is positioned at various positions in the cylinder wake. Using PIV and LDV measurements, the flow past the cylinder is investigated and the local and global loads on the turbine are also acquired. The turbine is considered idle or in rotation (TSR=3,4 or 5). The database created is presented in this report.
DOI: 10.17882/62598
title: Leonardo Vordoni's sea level record at Trieste (1782-1794)

description: The data set includes irregular sea level heights observations made from 1782 to 1794 by the physician Leonardo Vordoni in Trieste, Italy, but in those times under the Austrian rule. The time series starts on 1 January 1782 and ends on 12 October 1794. The observations were performed twice a day until June 1791 and more frequently afterwards. The original heights are expressed in Paris feet and inches (1 ft = 32.4845 cm), relative to the green belt formed by algae on a pole. The data were digitized from original handwritten documents and quality-checked as far as possible.
DOI: 10.17882/62596
title: JERICO-NEXT TNA: Monitoring of Organic Contaminants in the water of the southern Europe with Passive Sampling (MoCo Sea Pass)

description: Selected urban/industrially impacted sites were monitored in an attempt to examine the impacts of anthropogenic activities on aquatic environments and to combine these results with AQUA-GAPS for a global scale estimation. The present project was aimed at developing new monitoring technologies to detect POPs in marine water and to evaluate the air-sea exchange of organic contaminants. Thus, it was achieved, for the first time, the simultaneous deployment of two passive samplers (air- and sea-samplers) resulting in (1) the evaluation of the present state of POPs pollution in the water and in the air of the Southern European coast and (2) the simultaneous monitoring of air-sea exchange of organic contaminants. The selected sites for deployment were in the Western part of Black Sea and in the Northern Adriatic Sea. Deployment sites included the Port Operational Marine Observing System (POMOS) (st.Balchik) in Black Sea and the Meteoceanographic site (S1-GB) in Mediterranean Sea. The concentrations of PAHs, PCBs, OCPs and PBDEs were measured in both air- and sea-passive samplers.