cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.910585
title: Physical oceanography during towed CTD track POS534_14-1 (VCTD04)
DOI: 10.1594/pangaea.918490
title: Erosion rates along Sobo-Sise Cliff 1965-2018

description: Permafrost thaw and ice wedge degradation lead to drastic landscape changes in the permafrost region. With this data set we investigated the cliff retreat of the Sobo-Sise Cliff (SSC), a high ice-bearing yedoma cliff in the Lena River Delta. The 1,660 m long cliff SSC extends from 72°32'34 N / 128°15'59 E to 72°32'06 N / 128°18'21 E and is located on the Sardakhskaya channel, which is one of the main Lena river branches in the Lena River Delta. Erosion rates for the SSC were determined based on satellite images from different sensors (Corona, Hexagon, Landsat, Planet cube-sat) for the period 1965-2018. Cliff front lines were manually digitized and erosion rates were calculated with the Digital Shoreline Analysis System (DSAS) tool (Himmelstoos et al. 2018). The study Fuchs et al. (2020) (DOI:10.3389/feart.2020.00336) shows that the up to 27.7 m high SSC erodes in average 15.7 m yr-1 (2015-2018). During the entire observed time period from 1965-2018, the SSC retreated in average 484 m (ranging from 322 - 680 m).This dataset includes the mean annual erosion rates of the yedoma SSC for the time periods 1965-1975, 1975-2000, 2000-2005, 2005-2010, 2010-2015, and 2015-2018, as well as the absolute cliff retreat rates over the entire period 1965-2018, which are derived from remote sensing imagery analyzed with the DSAS tool (doi:10.1594/PANGAEA.918505).Related trend data for this region, based on Landsat trend analysis are available at doi:10.1594/PANGAEA.884136 (Nitze, 2018).
DOI: 10.1594/pangaea.925076
title: (Table S1) Sponge biomass and natural isotopic ratios for incubated deep-sea sponge specimens

description: HMA Average background delta values for 13C and 15N are presented for deep-sea sponge species Geodia barretti (Demosponge, HMA), Hymedesmia paupertas (Demosponge, LMA) and Vazella pourtalesii (Hexactinellid, LMA). Carbon (C) and nitrogen (N) content are presented as % of dry weight (DW). Isotopic delta values for 13C and 15N, after incubations with 13C- and 15N-isotope-enriched dissolved organic matter (DOM) and bacteria (BAC), are presented for all specimens incubated.
DOI: 10.1594/pangaea.925078
title: (Table S3) Relative abundance of each phospholipid fatty acid to the total PLFA content of each deep-sea sponge species and substrate

description: Values are in percentages of total PLFAS.
DOI: 10.1594/pangaea.814045
title: (Table 1) CPI, ACL, ratio between n-C31 and n-C29 alkane, concentration of summed n-C29 and n-C31 alkane, stable δ¹³C and dD composition of n-C29 and n-C31 alkane and dD of precipitation, Italien N-S transect

description: MV: mean value.SD: standard deviation.AM: anual mean.OIPC: Data from Online Isotope in Precipitation Calculator (OIPC), http://wateriso.eas.purdue.edu/waterisotopes/These samples represent the top 1 cm of sediments.
DOI: 10.1594/pangaea.908904
title: Current measurements (Nortec AWAC 1 Mhz ADCP) collected at the OBSEA underwater observatory during June, 2010
DOI: 10.1594/pangaea.903192
title: Weather station (Meteo Buoy WeatherStation Instrument 150WX) measurements collected at the OBSEA underwater observatory buoy during July, 2013
DOI: 10.1594/pangaea.903198
title: Weather station (Meteo Sarti Vantage Pro2) measurements collected at the OBSEA shore station (UPC) during October, 2013
DOI: 10.1594/pangaea.899821
title: Denitrification rates in boreo-arctic sponges - data of sponge species from Korsfjord (Norway) and the Schulz Bank (Arctic Ocean)

description: Sponges are commonly known as general nutrient providers for the marine ecosystem, recycling organic matter into various forms of bio-available nutrients such as ammonium and nitrate. In this study we challenge this view. We show that nutrient removal through microbial denitrification is a common feature in six cold-water sponge species from boreal and Arctic sponge grounds. Denitrification rates were quantified by incubating sponge tissue sections with 15NO3- - amended oxygen saturated seawater, mimicking conditions in pumping sponges, and de-oxygenated seawater, mimicking non-pumping sponges. Rates of anaerobic ammonium oxidation (anammox) using incubations with 15NH4+ could not be detected. Denitrification rates of the different sponge species ranged from 0 to 97 nmol N cm-3 sponge day-1 under oxic conditions, and from 24 to 279 nmol N cm-3 sponge day-1 under anoxic conditions. A positive relationship between the highest potential rates of denitrification (in the absence of oxygen) and the species-specific abundances of nirS and nirK genes encoding nitrite reductase, a key enzyme for denitrification, suggests that the denitrifying community in these sponge species is active and prepared for denitrification. The lack of a lag phase in the linear accumulation of the 15N labelled N2 gas in any of our tissue incubations is another indicator for an active community of denitrifiers in the investigated sponge species. Low rates for coupled nitrification-denitrification indicate that also under oxic conditions, nitrate to fuel denitrification rates was derived rather from the ambient sea-water than from sponge nitrification. The lack of nifH genes encoding nitrogenase, the key enzyme for nitrogen fixation, shows that the nitrogen cycle is not closed in the sponge grounds. The denitrified nitrogen, no matter of its origin, is then no longer available as a nutrient for the marine ecosystem.These results reveal the following scenario for the potential denitrification capacity of sponge grounds based on typical sponge biomass on boreal and Arctic sponge grounds:, Areal denitrification rates of 0.6 mmol N m-2 day-1 assuming non-pumping sponges and still 0.3 mmol N m-2 day-1 assuming pumping sponges may be possible. This is well within the range of denitrification rates of continental shelf sediments. For the most densely populated boreal sponge grounds we calculated potential denitrification rates of up to 1,7 mmol N m-2 day-1, which is higher than typical rates in continental shelf sediments. Increased future impact of sponge grounds by anthropogenic stressors reducing sponge pumping activity and further stimulating sponge anaerobic processes may thus lead to that deep-sea sponge grounds change their role in the marine ecosystem from being mainly nutrient sources to becoming mainly nutrient sinks.
DOI: 10.1594/pangaea.902132
title: (S1 Table) Presence and absence response data of Vazella pourtalesi collected between 1997 and 2017

description: Vazella pourtalesi presence and absence data were obtained from several different sources: DFO's multispecies trawl survey conducted in the Maritimes Region between 2007 to 2017 (presences and absences), DFO optical (in-house camera/video and remotely operated vehicle) benthic surveys conducted between 2001 and 2017 (presences only), and commercial bycatch records from the Fisheries Observer Program (FOP) from 1997 to 2007, and 2010 to 2015 (presences only). The DFO multispecies trawl survey is stratified random (by depth) and conducted using primarily Western IIA trawl gear. The average distance of these tows is ~ 3.17 km. Absence records were created from null (zero) catches that occurred in the same surveys. Commercial bycatch data between 1997 to 2007 from the Fisheries Observer Program was further post-processed and validated for accuracy, while the data from 2010 to 2015 was extracted directly from the Maritimes Fishery Science Database managed by DFO. Commercial trawls are much longer in duration and may follow bottom contours and/or retrace their footprint through the course of a 10+ km tow. For both the DFO multispecies trawl survey and FOP data, start coordinates were used to represent the tow, whereas for the DFO benthic imagery survey data the actual location of the V. pourtalesi record in situ was used. A 1 x 1 km grid matching that of the environmental data was placed over the study area and the presence-absence data were reduced to one record per cell, with a presence taking precedence over an absence if both occurred in the same cell. This gave a total of 215 presences (102 from the DFO trawl surveys, 47 from DFO benthic science surveys, and 66 from the FOP) and 2867 absences for the model.
description: Supplement to: Beazley, Lindsay; Wang, Z; Kenchington, Ellen L; Yashayaev, Igor M; Rapp, Hans Tore; Xavier, Joana R; Murillo, Francisco Javier; Fenton, Derek; Fuller, Susanna (2018): Predicted distribution of the glass sponge Vazella pourtalesi on the Scotian Shelf and its persistence in the face of climatic variability. PLoS ONE, 13(10), e0205505
DOI: 10.1594/pangaea.894268
title: Multibeam survey during G.O. Sars cruise in June 2016, at the Schultz Massif Seamount (Norwegian/Greenland Sea)
DOI: 10.1594/pangaea.909410
title: Physical oceanography during POSEIDON cruise POS527
DOI: 10.1594/pangaea.897520
title: High-resolution 2D seismic reflection data of the Witch Ground Basin (central North Sea) during research cruise MSM63

description: High-resolution 2D seismic reflection data during research cruise MSM63 in April/May 2017 onboard RV Maria S. Merian. The seismic profiles were acquired with a two-105/105-in3-GI-Gun-array shot at 210 bar every 5 seconds and a 150 m-long streamer with 96 channels and 1.5625 m channel spacing. The resulting shot point distance is approximately 8.75-12.5 m at 3.5-5 kn ship speed. The frequency range of the two-GI-Gun-array is 15-500 Hz. The processing included geometry and delay corrections, static corrections, binning to 1.5625 m and bandpass filtering with corner frequencies of 25, 45, 420, and 500 Hz. Furthermore, a normal-move-out-correction (with a constant velocity of 1488 m/s calculated from CTD measurements) was applied and the data were stacked and then migrated using a 2D Stolt algorithm (1500 m/s constant velocity model).
DOI: 10.1594/pangaea.883412
title: Turbidity measurements collected during the first EGIM deployment at the OBSEA cabled observatory, December, 2016

description: Uncalibrated sensor data
DOI: 10.1594/pangaea.924531
title: Occurrence records of Geodia species (Porifera, Demospongiae, Tetractinellida) from the North Atlantic and Arctic Oceans

description: This dataset contains occurrence records (i.e., species name, latitude, longitude, depth (where available), and metadata) for six species of the demosponge genus Geodia Lamarck, 1815, belonging to the Geodiidae family: Geodia atlantica (Stephens, 1915); Geodia barretti Bowerbank, 1858; Geodia macandrewii Bowerbank, 1858; Geodia phlegraei (Sollas, 1880); Geodia hentscheli Cárdenas et al. 2010; and Geodia parva Hansen, 1885. The records fall in the North Atlantic and Arctic Oceans, and are used/described in the linked article by Roberts et al. (2021). Note that the dataset provided has not been subjected to any of the filtering stages applied in that manuscript for the purposes of various novel biogeographical analyses (i.e., it is original and complete), and the taxonomic identifications have been rigorously checked (as described therein).Definitions of institution abbreviations used in the 'Museum Specimen / Picture Information' column of the dataset spreadsheet have been provided in an accompanying table (see Comment field below). Where records are derived from earlier literature sources, full references for citations given in the 'Campaign / Source' column (and further general information on many of the records) may be found in the articles by Cárdenas et al. (2010; 2013) and Cárdenas & Rapp (2015). An earlier version of this dataset may be accessed at the DRYAD repository:Cárdenas P, Rapp HT, Klitgaard AB, Best M, Thollesson M, Tendal OS (2013), Data from: Taxonomy, biogeography and DNA barcodes of Geodia species (Porifera, Demospongiae, Tetractinellida) in the Atlantic boreo-arctic region, Dryad, Dataset, doi:10.5061/dryad.td8sb
description: Abbreviation =&gt; Full NameBIO =&gt; Bedford Institute of Oceanography, Halifax, NS, CanadaCGB =&gt; Centre for Geobiology, University of Bergen, NorwayDFO =&gt; Fisheries and Oceans CanadaIEO =&gt; Spanish Institute of OceanographyMNHN =&gt; National Museum of Natural History, Paris, FranceNHM =&gt; Natural History Museum, London, UKNMID =&gt; National Museum of Ireland, DublinNTNU-VM =&gt; NTNU University Museum, Trondheim, NorwayPC =&gt; Private Collection (Dr. Paco Cárdenas, unless otherwise stated)RMNH =&gt; National Museum of Natural History, Leiden, NetherlandsSMNH =&gt; Swedish Museum of Natural History, StockholmUiB =&gt; University of Bergen, NorwayUPSZMC =&gt; Zoological Museum of Uppsala, SwedenZMAPOR =&gt; Zoological Museum, University of Amsterdam, NetherlandsZMB =&gt; Natural History Museum, Berlin, GermanyZMBN =&gt; University Museum of Bergen, NorwayZMO =&gt; University of Oslo Natural History Museum, NorwayZMUC =&gt; Zoological Museum, Copenhagen, Denmark
DOI: 10.1594/pangaea.927956
title: Long-term monitoring of near-bottom physical properties at an Arctic deep-sea sponge ground

description: Deep-sea sponge grounds are hotspots of benthic biomass and diversity. To date, very limited data exists on the range of environmental conditions in areas containing deep-sea sponge grounds and which factors are driving their distribution and sustenance. We investigated oceanographic conditions at a deep-sea sponge ground located on an Arctic Mid-Ocean Ridge seamount. Hydrodynamic measurements were performed along CTD transects and a lander was deployed within the sponge ground that recorded near-bottom physical properties as well as vertical fluxes of organic matter over an annual cycle. The data demonstrate that the sponge ground is found at water temperatures of -0.5 to 1 °C and is situated at the interface between two water masses at only 0.7° equatorward of the turning point latitude of semidiurnal lunar internal tides. Internal waves supported by vertical density stratification interact with the seamount topography and produce turbulent mixing as well as resuspension of organic matter with temporarily very high current speeds up to 0.72 m s-1. The vertical movement of the water column delivers food and nutrients from water layers above and below towards the sponge ground. Highest organic carbon flux was observed during the summer phytoplankton bloom period, providing fresh organic matter from the surface. The flux of fresh organic matter is unlikely to sustain the carbon demand of this ecosystem. Therefore, the availability of bacteria, nutrients and dissolved and particulate matter, delivered by tidally-forced internal wave turbulence and transport by horizontal mean flows, likely plays an important role in meeting ecosystem-level food requirements.
DOI: 10.1594/pangaea.913194
title: Zooplankton capture rates by the octocoral species Dentomuricea aff. meteor and Viminella flagellum in the Azores Archipelago

description: The majority of octocoral species are found in waters deeper than 50m where they create three-dimensional and highly heterogenous habitats known as coral gardens. The Azores Archipelago is an octocoral biodiversity hotspot and coral gardens are one of the most prominent deep-sea communities encountered regionally. Although food availability and flow have been recognized as key factors in determining the dynamics of suspension feeder communities, very little information exists on how flow affects the feeding capacity of deep octocoral species. The study focused on two common habitat-forming octocoral species in the Azores, Dentomuricea meteor and Viminella flagellum, aiming at determining their ability to capture zooplankton prey under variable flow velocities. The rotifer Branchionus plicatilis was used as prey, while three flow velocities were established in recirculating 13L flumes: 3 cm/s, 6 cm/s and 9 cm/s. Both species efficiently captured zooplankton prey. Capture rates were lower under 3 cm/s, however no difference was detected between 6 and 9 cm/s. Dentomuricea meteor reached higher capture rates per polyp than V.flagellum, possibly due to their differences in polyp size and density.
DOI: 10.1594/pangaea.927955
title: Vertical fluxes of organic matter over an annual cycle at an Arctic deep-sea sponge ground

description: Deep-sea sponge grounds are hotspots of benthic biomass and diversity. To date, very limited data exists on the range of environmental conditions in areas containing deep-sea sponge grounds and which factors are driving their distribution and sustenance. We investigated oceanographic conditions at a deep-sea sponge ground located on an Arctic Mid-Ocean Ridge seamount. Hydrodynamic measurements were performed along CTD transects and a lander was deployed within the sponge ground that recorded near-bottom physical properties as well as vertical fluxes of organic matter over an annual cycle. The data demonstrate that the sponge ground is found at water temperatures of -0.5 to 1 °C and is situated at the interface between two water masses at only 0.7° equatorward of the turning point latitude of semidiurnal lunar internal tides. Internal waves supported by vertical density stratification interact with the seamount topography and produce turbulent mixing as well as resuspension of organic matter with temporarily very high current speeds up to 0.72 m s-1. The vertical movement of the water column delivers food and nutrients from water layers above and below towards the sponge ground. Highest organic carbon flux was observed during the summer phytoplankton bloom period, providing fresh organic matter from the surface. The flux of fresh organic matter is unlikely to sustain the carbon demand of this ecosystem. Therefore, the availability of bacteria, nutrients and dissolved and particulate matter, delivered by tidally-forced internal wave turbulence and transport by horizontal mean flows, likely plays an important role in meeting ecosystem-level food requirements.
DOI: 10.1594/pangaea.903270
title: Weather station (Meteo Buoy WeatherStation Instrument 150WX) measurements collected at the OBSEA underwater observatory buoy during August, 2016
DOI: 10.1594/pangaea.913195
title: Feeding biology of a habitat forming antipatharian in the Azores Archipelago

description: Benthic suspension feeders have developed a variety of feeding strategies and food availability has often proven to be a key factor explaining their occurrence and distribution. The feeding biology of coral species has been the target of an increasing number of studies, however most of them focus on Scleractinia and Octocorallia, while information for Antipatharia is very scarce. The present study focused on Antipathella wollastoni, a common habitat-forming antipatharian in the Azores Archipelago, forming dense black coral forests between 20 and 150 meters. The objective of the study was to investigate the food preferences of the target species upon availability of different isotopically enriched food substrates and determine its ability to capture zooplankton prey under different flow speeds. The species was able to utilize different food sources including live phytoplankton, live zooplankton and Dissolved Organic Matter (DOM), indicating the ability to exploit seasonally available food sources. However ingestion of zooplankton enhanced Carbon (C) and Nitrogen (N) incorporation in coral tissue and metabolic activity, highlighting the importance of zooplankton prey for vital physiological processes such as growth and reproduction. The species displayed a high capacity to capture zooplankton prey over different flow rates, however capture rates were higher under 4 cm s-1, highlighting the ability of A. wollastoni to exploit high quantities of shortly available prey.
DOI: 10.1594/pangaea.903269
title: Weather station (Meteo Sarti Vantage Pro2) measurements collected at the OBSEA shore station (UPC) during July, 2016
DOI: 10.1594/pangaea.909118
title: Species and environmental variables per 40m subtransect with coordinates from the Logachev Mound Province
DOI: 10.1594/pangaea.910412
title: Methane and carbon dioxide concentrations measured during POSEIDON cruise POS527, 2018-08-17

description: A gas inlet was installed at the bow of RV Poseidon.Atmospheric gas concentrations of CH4 and CO2 were measured continuously with a Picarro G2301-f analyzer.Concentrations are given as “ppmV in dry air”.
DOI: 10.1594/pangaea.903178
title: Weather station (Meteo Sarti Vantage Pro2) measurements collected at the OBSEA shore station (UPC) during December, 2012
DOI: 10.1594/pangaea.903200
title: Weather station (Meteo Sarti Vantage Pro2) measurements collected at the OBSEA shore station (UPC) during December, 2013
DOI: 10.1594/pangaea.902734
title: CTD (SBE 16 PLUS V2) measurements collected at the OBSEA underwater observatory during May, 2018
DOI: 10.1594/pangaea.908965
title: Current measurements (Nortec AWAC 1 Mhz ADCP) collected at the OBSEA underwater observatory during July, 2014
DOI: 10.1594/pangaea.902637
title: CTD (SBE 37 SMP) measurements collected at the OBSEA underwater observatory during May, 2015
DOI: 10.1594/pangaea.909019
title: Wave measurements (Nortec AWAC 1 Mhz ADCP) collected at the OBSEA underwater observatory during April, 2018
DOI: 10.1594/pangaea.909031
title: Wave measurements (Nortec AWAC 1 Mhz ADCP) collected at the OBSEA underwater observatory during November, 2018
DOI: 10.1594/pangaea.908973
title: Current measurements (Nortec AWAC 1 Mhz ADCP) collected at the OBSEA underwater observatory during May, 2015
DOI: 10.1594/pangaea.909017
title: Current measurements (Nortec AWAC 1 Mhz ADCP) collected at the OBSEA underwater observatory during April, 2018
DOI: 10.1594/pangaea.909002
title: Wave measurements (Nortec AWAC 1 Mhz ADCP) collected at the OBSEA underwater observatory during May, 2017
DOI: 10.1594/pangaea.908974
title: Wave measurements (Nortec AWAC 1 Mhz ADCP) collected at the OBSEA underwater observatory during May, 2015
DOI: 10.1594/pangaea.909006
title: Wave measurements (Nortec AWAC 1 Mhz ADCP) collected at the OBSEA underwater observatory during July, 2017
DOI: 10.1594/pangaea.908961
title: Current measurements (Nortec AWAC 1 Mhz ADCP) collected at the OBSEA underwater observatory during May, 2014
DOI: 10.1594/pangaea.908968
title: Wave measurements (Nortec AWAC 1 Mhz ADCP) collected at the OBSEA underwater observatory during August, 2014
DOI: 10.57710/alba-es-20250340389
title: Resolving the structure of Earth-abundant metal single-atom catalyst materials with enhanced electrochemical performance

description: This proposal aims to study the coordination and the interactions between Ni/Mn layered double hydroxides (NML) and graphene-acid (GA) systems with enhanced electrochemical performance and the working mechanism of NML-GA in supercapacitors by XANES/EXAFS. The optimized concentration of GA played a key role in obtaining NML/GA hybrid  with enhanced electrochemical performance. We suspect that incorporating the optimized amount of functionalized graphene moiety leads to strong interfacial interactions with NML, substantially enhancing the electrochemical performance with respect to both NML or GA alone and , exhibiting a peak when 15 wt.% of GA is added. Investigating the coordination structure of such materials is crucial in establishing the link between their performance and their structure and thus understanding the mechanism behind the electrochemical  enhancement.
DOI: 10.15468/dl.vcb6up
title: Occurrence Download

description: A dataset containing 3847461 species occurrences available in GBIF matching the query:
{
 "and" : [
 "DatasetKey is iNaturalist Research-grade Observations",
 "TaxonKey is Mammalia"
 ]
}

 The dataset includes 3847461 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0003003-260120142942310/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.