cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.15468/dl.hps92n
title: Occurrence Download

description: A dataset containing 405584 species occurrences available in GBIF matching the query:
{
 "and" : [
 "DatasetKey is iNaturalist Research-grade Observations",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Country is one of (Canada, Mexico, United States of America)",
 "EventDate is greater than or equal to 2024-12-26",
 "EventDate is less than or equal to 2025-01-25",
 {
 "not" : {
 "Issue" : [
 "is one of (Basis of record invalid, Coordinate reprojection failed, Coordinate reprojection suspicious, Coordinate precision invalid, Coordinate uncertainty meters invalid, Country mismatch, Country invalid, Geodetic datum invalid, Presumed swapped coordinate, Presumed negated longitude, Presumed negated latitude, Country coordinate mismatch)"
 ]
 }
 }
 ]
}

 The dataset includes 405584 records from 1 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0004463-250218110819086/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.hankpq
title: Occurrence Download

description: A dataset listing the 432 species recorded in GBIF matching the query:
{
 "and" : [
 "Country is Denmark",
 "TaxonKey is Mammalia"
 ]
}

 The dataset's 432 records were derived from 107 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0004466-250218110819086/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.kmbt3v
title: Occurrence Download

description: A dataset containing 546 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Machine Observation, Human Observation, Specimen)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Issue is one of (Coordinate rounded, Geodetic datum assumed WGS84, Coordinate reprojected, Country derived from coordinates, Continent derived from coordinates)",
 "TaxonKey is Abies hickelii Flous & Gaussen"
 ]
}

 The dataset includes 546 records from 29 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0004470-250218110819086/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.15468/dl.tkze8m
title: Occurrence Download

description: A dataset containing 380 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Specimen, Human Observation, Machine Observation)",
 "Country is one of (Mexico, United States of America)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Issue is one of (Coordinate rounded, Geodetic datum assumed WGS84, Country derived from coordinates, Continent derived from coordinates)",
 "OccurrenceStatus is Present",
 "TaxonKey is Quercus germana Schltdl. & Cham."
 ]
}

 The dataset includes 380 records from 38 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0004472-250218110819086/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.965093
title: The effect of light intensity versus light dose on the photosynthetic performance of two strains of Ulva lacinulata

description: The genus Ulva, described as a good source of antioxidants known for its antibacterial properties and associated with the capacity to adapt to different environments and high growth rates has justified the increasing interest in its large-scale production. While extensive research has been done on optimizing the extraction of Ulva's bioactive compounds, few studies were conducted on increasing or optimizing antioxidant activity of Ulva spp. during cultivation. Our study aimed to investigate an energy-saving cultivation method for optimizing Ulva lacinulata by testing the impact of light dose and light intensity on its antioxidant activity. Two geographically different strains (NE-Atlantic and Mediterranean) were observed for 5 days under two light intensities (70 or 185 µmol photons m-2 s-1) with the same light dose (4 mol photons m-2 d-1). Samples were collected at different times to evaluate the photosynthetic performance (using a Pulse Amplitude Modulated fluorometer). A strain-dependent response was observed between the NE-Atlantic strain and the Mediterranean strain, suggesting that light dose may significantly affect antioxidant activity in certain Ulva spp.
DOI: 10.1594/pangaea.834724
title: (Supplementary Table 1) Mean absolute abundance of the tintinnid species with high contribution to total tintinnids in the Argentine Shelf and Drake Passage waters
DOI: 10.1594/pangaea.967049
title: Laboratory experiments of nitrate uptake kinetic of the green tide reference algae Ulva spp. during two successive productive seasons (2022-2023) observed on Brittany coasts

description: The seasonal proliferations of green seaweeds under the morphological blade-type Ulva have been observed on Brittany coasts since the late 60s-early 70s. These so-called green tides are directly related to the eutrophication of coastal waters, and especially to high terrigenous inputs of nitrogen to the sea. In this context, a management tool, i.e. the ecological Model for Application at Regional Scale MARS3D-Ulve, has specifically been developed to support stakeholders to set realistic targets for nitrogen input reductions. Among key parameters of the model, the maximum nitrate uptake rate (Vmax) and the half-saturation constant for nitrate (Km) of Ulva sp. have initially been calibrated to reproduce the seasonal variation of the internal nitrogen and phosphorus algal contents measured in situ for five sites along the Brittany coastline (La Fresnaye Bay, Saint-Brieuc Bay, Lannion Bay, Guissény Bay and Douarnenez Bay; Perrot et al. (2014, doi:10.1016/j.jmarsys.2013.12.010)). The calibrated values of Vmax and Km require therefore to be experimentally validated.Laboratory experiments were monthly set up to assess the seasonal evolution of nitrate uptake kinetic of Ulva spp. from May to September during two successive seasons (2022 and 2023). Healthy vegetative thalli of the dominant Ulva species were randomly sampled on Lermot Beach, located in Saint-Brieuc Bay (lat 48.5339, long 2.6622). Eventhough the model MARS3D-Ulve does not differentiate Ulva sp. at the species level, morpho-anatomical identification of the sampled thalli was carried out following the updated taxonomic classification of Hughey et al. (2021, doi:10.1080/09670262.2021.1914862). Algae were grown in 5 l polypropylen beakers in 0.2 µm filtered seawater under 7 different nitrate concentrations (0, 5, 10, 20, 50, 100, 200 µmol/l). Phosphate was added (3 µmol/l) in each beaker to avoid limitation. The experiment was run under a light intensity of 150 µmol photons m²/s. Photoperiod and temperature were adjusted to measured in situ conditions. The laboratory experiments consisted in assessing nitrates concentrations in each medium after 30 minute-incubation period. Nitrate uptake rates were calculated from nitrate concentrations and the corresponding kinetic parameters Vmax and Km were estimated by fitting data with the Michaelis-Menten equation, using a nonlinear least-squares regression (Lotze and Schramm, 2000, doi:10.1046/j.1529-8817.2000.99109.x). Each experiment was replicated three times. Before each experiment, physiological and nutritional states of algae were determined from the assessment of their maximum quantum yield (Fv/Fm), and their nitrogen and phosphorus tissue contents respectively. Those assessments were done from four replicated samples.
DOI: 10.1594/pangaea.859899
title: Swath sonar bathymetry during POLARSTERN cruise PS93.1 (ARK-XXIX/2.1) with links to multibeam raw data files

description: Contact mailto:infobathy@awi.de for data access.
DOI: 10.1594/pangaea.971431
title: Measurements of bending properties of kelp, Laminaria hyperborea, Heligoland, Germany

description: The flexural rigidity and bending modulus of kelp, Laminaria hyperborea, collected at the MarGate area (https://www.awi.de/en/science/special-groups/scientific-diving/margate.html) north of Heligoland, Germany (latitude: 54° 11.700'N, longitude: 7° 52.600'E) was determined from measurements performed at the Alfred Wegener Institute (AWI) Helmholtz Centre for Polar and Marine Research. Scientific divers from the Biological Institute Helgoland, AWI, collected nine kelps (Laminaria hyperborea) from the MarGate area on 21.06.2022. The collected kelps were transported into the laboratory in boxes filled with seawater from the site and stored in laboratory sinks filled with running aerated seawater from the North Sea during the experiments. The measurements were carried out on 23.06.2022, 25.06.2022, and 27.06.2022. They consisted of cutting strips 20 cm in length (L) and 2.5 cm in width (b) from the blades close to the stipe of each kelp. The cut-out strips were towel-dried, and their thickness (t, mm) and weight in grams were measured. The weight in grams was converted to weight per unit area (w, N/m²) to compute the flexural rigidity per unit width (J, Nm). A standard ruler with precision for the nearest millimeter was used to measure the length (L), width (b), and cantilever length (l) of strips. The thickness (t) of the strip was measured with a caliper gauge that measured to the nearest 0.01 millimeter. The weight of the strip was measured by a weighing scale (Sartorius, LE323S), which had a precision of 0.001 grams. The cut-out strips from each kelp form the nine samples tested for the bending properties. Each sample is used to repeat the cantilever test four times, i.e., both sides' ends, as Henry (2014) recommended to improve the accuracy. An apparatus consisting of two planes, one angled at 45° (θ = 45°) and the other parallel to the horizontal, was used for the test. The device was clamped onto a table on the horizontal plane. The experimental protocol consists of laying each strip onto the apparatus with the strip's edge coinciding with the apparatus's angled edge. After that, the strip is slowly moved forward with a ruler, with the ruler's zero coinciding with the strip's edge. This is done until the tip of the strip touches the inclined plane. The horizontal projection of the length of the hanging strip is equal to the distance between the ruler's tip and the apparatus's angle, termed the cantilever length (l). The flexural rigidity per unit width (J, Nm) and the bending modulus (Eb, N/m²) are then calculated with the second moment of area (I, m⁴) as in Henry (2014).
DOI: 10.1594/pangaea.965061
title: Biochemical components and energy content of the pelagic tunicate Salpa thompsoni measured across the Southern Ocean and forty years (1980–2020)

description: The pelagic tunicate Salpa thompsoni is a widespread cold-water metazoan and a major grazer of phyto- and microzooplankton in the Southern Ocean. Long-term time series and spatiotemporal models predict that salps will expand their distribution towards higher latitudes over the next decades with ramifications for all food web components, including higher tropic level predators. Salps are potentially less nutritious and energy-rich than co-occurring euphausiids. In a changing Southern Ocean ecosystem, predators such as baleen whales, seabirds, and planktivorous fish that historically relied on an energy-rich and numerous food source (euphausiids) may face an uncertain future. This, however, may differ by season too. Whether S. thompsoni are a less nutritious prey item than euphausiids across an annual cycle at circumpolar mid and high latitudes (51–70°S) has not been investigated. We utilised published and new body composition data, i.e., organic content (ash-free dry weight as percent of dry weight, DW), carbon content (carbon weight as percent of DW), and proximate biochemical composition (carbohydrate, lipid, and protein weight as percent of DW), collected over the past forty years (1980–2020). Energy content values were calculated based on these parameters using published conversion factors. We corrected for residual water (water remaining in tissue after drying) with a published conversion factor of 12.9 %. Samples (N = 303, sometimes comprising of several salps) were collected in four seasons using a variety of large plankton nets and midwater trawls between the surface and 3200 m (mostly less than 400 m). Each specimen was sized (oral-atrial or total length) and staged (blastozooid, oozooid). The carbon-to-nitrogen ratio (C/N value) was reported for most (77 %) of the samples. Samples were used for the determination of sometimes one or several body composition parameters: organic content (N = 151), carbon content (N = 220), and proximate biochemical composition (N = 70). The weight-specific energy content ranged between &lt; 0.1 and 20.5 kJ g DW⁻¹.
description: Methods for the SPX samples (Lüskow et al. 2025):* oven-dried at 100°C for 24 h* dry mass was determined using an analytical balance with the 10 μg precision before homogenisation (pestle and mortar)* ash mass: muffle furnace at 500°C for 24 h* carbon: AH7529 analyser (triplicates)* proteins: Kjeldahl method (Kjeldahl 1883)* lipids: Bligh and Dyer method (Bligh and Dyer 1959)
DOI: 10.1594/pangaea.973520
title: Mangrove geometric traits among genera and climate zones

description: In coastal engineering, mangrove vegetation is typically modelled as rigid cylinders to represent their roots, trunks, and canopies. However, the geometry of mangroves varies greatly among species, ages, locations, and environmental conditions. Despite many studies on mangrove morphology, detailed geometric data for precise coastal protection models is still limited. Variations in root structures are especially critical for functions such as flow modification, sediment deposition, surface elevation changes, and wave reduction. Here, we systematically reviewed the literature to collect data on the height, diameter, and densities of roots, trunks, and canopies for 28 mangrove genera across tropical, subtropical, semi-arid, and temperate regions. This dataset aims to serve as a resource for engineers, and ecologists interested in more accurately representing specific mangrove genera in models.
DOI: 10.1594/pangaea.967080
title: Radionuclide (210Pb, 137Cs) and mercury measurements from short sediment cores (multicorer) taken during ALKOR cruises AL557 and AL561, Skagerrak

description: Six short sediment cores (&lt;50cm) were collected using a Multicorer on the continental margin of the Skagerrak between 434 - 677 meter water depth. The sediment cores were retrieved during two research cruises with the RV Alkor, the cruise Al557 from 4th to 23rd of June 2021 and the cruise AL561 from 2nd to 13th of August 2021. Sediment samples were analysed for lead-210 (210Pb) and caesium-137 (137Cs) by gamma spectrometry, fraction modern carbon-14 (F14C) using the MICADAS micro-scale Accelerator Mass Spectrometer, and mercury (Hg) using a Direct Mercury Analyzer DMA-80 evo. The dataset was used to setup an age-depth model covering the last 120 years to determine the temporal variability in sedimentation rates in the Skagerrak.
DOI: 10.1594/pangaea.960831
title: Untargeted 1H‐NMR based metabolic profiling of liver and muscle tissue of juvenile turbot (Scophthalmus maximus) fed with emerging protein sources

description: This study examined the metabolic response of juvenile turbot (Scophthalmus maximus) to diets with graded fishmeal (FM) replacement with plant, animal, and emerging protein sources (PLANT, PAP, and MIX) in comparison to a commercial-like diet (CTRL). The feeding experiment was carried out from April to July 2019 in the Centre for Aquaculture Research (ZAF) at the Alfred Wegener Institute for Polar and Marine research in Bremerhaven, Germany. The juvenile turbot (Scophthalmus maximus) were purchased from France Turbot (L'Épine, France) and acclimated to the recirculating aquaculture system (RAS) for 2 weeks prior to starting the 16 weeks experimental trial. To elucidate the effects of the protein sources and the level of FM replacement on the metabolic response of the fish, a 1H‐nuclear magnetic resonance (NMR) spectroscopy was used to assess the metabolic profiles of muscle and liver tissue after feeding the fish the experimental diets for 16 weeks. Feed, muscle, and liver samples were ground under liquid nitrogen and approx. 200–250 mg tissue was homogenized in 5x volume of ice‐cold 0.6 M perchloric acid (PCA) (w:v). After one cycle of 20 s at 6000 rpm and 3 °C, using Precellys 24 (Bertin Technologies, Montigny‐le‐Bretonneux, France), samples were sonicated for 2 min at 0 °C and 360 W (Branson Sonifier 450, FisherScientific, Schwerte, Germany). Homogenates of the experimental diets, muscle and liver tissues were centrifuged for 2 min at 0 °C and 16,000 g, and supernatants were neutralized with ice cold potassium hydroxide (KOH) and PCA to pH 7.0–7.5. To remove precipitated potassium, perchlorate samples were centrifuged again for 2 min at 0 °C and 16,000 g. The entire supernatant was transferred, shock‐ frozen in liquid nitrogen, and stored an −80 °C for later analysis. One‐dimensional 1H‐NMR spectra for feed and tissues extracts were acquired using a vertical 9.4 T wide bore magnet with Avance III HD (Bruker‐GmbH, Ettlingen, Germany) at 400.13 MHz with a 1.7 mm diameter triple tuned (1H‐13C‐15N) probe. Each spectrum was processed and analyzed with Chenomx NMR Suite 8.4 software (Chenomx Inc., Edmonton, Canada). Before analyzing, the spectra were corrected for phase, shim and baseline and calibrated to trymethylsilyl proprionate (TSP) signal (at 0.0 ppm).
DOI: 10.1594/pangaea.943425
title: SUNDANS underway data from SONNE cruise SO270
DOI: 10.1594/pangaea.943422
title: Physical oceanography (CTD) during SONNE cruise SO270
DOI: 10.15468/dl.hkw2k4
title: Occurrence Download

description: A dataset containing 193 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Machine Observation, Human Observation, Specimen)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "Issue is one of (Coordinate rounded, Geodetic datum assumed WGS84, Coordinate reprojected, Continent derived from coordinates, Country derived from coordinates)",
 "OccurrenceStatus is Present",
 "TaxonKey is Eugenia xalapensis (Kunth) DC."
 ]
}

 The dataset includes 193 records from 19 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0004473-250218110819086/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.943423
title: Bottom water analysis of MUC samples from SONNE cruise SO270
DOI: 10.1594/pangaea.943424
title: Pore waters analysis of MUC samples from SONNE cruise SO270
DOI: 10.1594/pangaea.969425
title: 2D multichannel seismic reflection raw data (GI Gun) of RV Petr Kottsov in 1998 to the Agulhas Plateau, seismic reflection profile AWI-98011

description: Seismic reflection data collected on the Agulhas Plateau during with RV Petr Kottsov in 1998. 2 GI-guns were used a seismic source, the data were recorded with a 2400 m (active length) long analog streamer. The data are demultiplexed and unprocessed. No gain, filter or mute have been applied. The data are in SEGY format. See cruise report or 98011_info.txt file for more information on acquisition parameters.
DOI: 10.1594/pangaea.969433
title: 2D multichannel seismic reflection raw data (GI Gun) of RV Petr Kottsov in 1998 to the Agulhas Plateau, seismic reflection profile AWI-98012

description: Seismic reflection data collected on the Agulhas Plateau during with RV Petr Kottsov in 1998. 2 GI-guns were used a seismic source, the data were recorded with a 2400 m (active length) long analog streamer. The data are demultiplexed and unprocessed. No gain, filter or mute have been applied. The data are in SEGY format. See cruise report or ReadMe file for more information on acquisition parameters.
DOI: 10.1594/pangaea.969434
title: 2D multichannel seismic reflection raw data (GI Gun) of RV Petr Kottsov in 1998 to the Agulhas Plateau, seismic reflection profile AWI-98013

description: Seismic reflection data collected on the Agulhas Plateau during with RV Petr Kottsov in 1998. 2 GI-guns were used a seismic source, the data were recorded with a 2400 m (active length) long analog streamer. The data are demultiplexed and unprocessed. No gain, filter or mute have been applied. The data are in SEGY format. See cruise report or ReadMe file for more information on acquisition parameters.
DOI: 10.1594/pangaea.969435
title: 2D multichannel seismic reflection raw data (GI Gun) of RV Petr Kottsov in 1998 to the Agulhas Plateau, seismic reflection profile AWI-98014

description: Seismic reflection data collected on the Agulhas Plateau during with RV Petr Kottsov in 1998. 2 GI-guns were used a seismic source, the data were recorded with a 2400 m (active length) long analog streamer. The data are demultiplexed and unprocessed. No gain, filter or mute have been applied. The data are in SEGY format. See cruise report or ReadMe file for more information on acquisition parameters.
DOI: 10.1594/pangaea.969436
title: 2D multichannel seismic reflection raw data (GI Gun) of RV Petr Kottsov in 1998 to the Agulhas Plateau, seismic reflection profile AWI-98016

description: Seismic reflection data collected on the Agulhas Plateau during with RV Petr Kottsov in 1998. 2 GI-guns were used a seismic source, the data were recorded with a 2400 m (active length) long analog streamer. The data are demultiplexed and unprocessed. No gain, filter or mute have been applied. The data are in SEGY format. See cruise report or ReadMe file for more information on acquisition parameters.
DOI: 10.1594/pangaea.969437
title: 2D multichannel seismic reflection raw data (GI Gun) of RV Petr Kottsov in 1998 to the Agulhas Plateau, seismic reflection profile AWI-98015

description: Seismic reflection data collected on the Agulhas Plateau during with RV Petr Kottsov in 1998. 2 GI-guns were used a seismic source, the data were recorded with a 2400 m (active length) long analog streamer. The data are demultiplexed and unprocessed. No gain, filter or mute have been applied. The data are in SEGY format. See cruise report or ReadMe file for more information on acquisition parameters.
DOI: 10.1594/pangaea.969438
title: 2D multichannel seismic reflection raw data (GI Gun) of RV Petr Kottsov in 1998 to the Agulhas Plateau, seismic reflection profile AWI-98018

description: Seismic reflection data collected on the Agulhas Plateau during with RV Petr Kottsov in 1998. 2 GI-guns were used a seismic source, the data were recorded with a 2400 m (active length) long analog streamer. The data are demultiplexed and unprocessed. No gain, filter or mute have been applied. The data are in SEGY format. See cruise report or ReadMe file for more information on acquisition parameters.
DOI: 10.1594/pangaea.969439
title: 2D multichannel seismic reflection raw data (GI Gun) of RV Petr Kottsov in 1998 to the Agulhas Plateau, seismic reflection profile AWI-98017

description: Seismic reflection data collected on the Agulhas Plateau during with RV Petr Kottsov in 1998. 2 GI-guns were used a seismic source, the data were recorded with a 2400 m (active length) long analog streamer. The data are demultiplexed and unprocessed. No gain, filter or mute have been applied. The data are in SEGY format. See cruise report or ReadMe file for more information on acquisition parameters.
DOI: 10.1594/pangaea.969440
title: 2D multichannel seismic reflection raw data (GI Gun) of RV Petr Kottsov in 1998 to the Agulhas Plateau, seismic reflection profile AWI-98200

description: Seismic reflection data collected on the Agulhas Plateau during with RV Petr Kottsov in 1998. 2 GI-guns were used a seismic source, the data were recorded with a 2400 m (active length) long analog streamer. The data are demultiplexed and unprocessed. No gain, filter or mute have been applied. The data are in SEGY format. See cruise report or ReadMe file for more information on acquisition parameters.