cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.949244
title: Biogenic opal record of gravity core MSM45_19-2

description: Biogenic opal (BSi) concentrations were analysed as indicator for past primary productivity on gravity core MSM45_19-2 from the northern Labrador Shelf. Gravity core MSM45_19-2 was obtained during R/V Maria S. Merian expedition MSM45 (58°45.68'N, 61°56.25'W, water depth: 202 m) in 2015 (Schneider et al., 2016). Biogenic opal was determined at Dalhousie University following the method of (Mortlock and Froelich , 1989). Briefly, amorphous silica was extracted from ca. 20 mg subsamples using a 2 M Na2 CO3 solution at 85°C for 5 h, followed by the measurement of dissolved silica concentrations by molybdenum blue spectrophotometry.
DOI: 10.1594/pangaea.950370
title: Abundance of eukaryotic picoplankton, eukaryotic nanoplankton and cyanobacteria Prochlorococcus and Synechococcus measured from water bottle samples during METEOR cruise M156

description: This dataset includes measured and calculated data over the epipelagic layer (0-200 m depth) of 25 stations with 14 of them inside or in the vicinity of a cyclonic eddy that formed off Mauritania along the ∼ 900 km zonal corridor between Mauritania and the Cabo Verde islands in the eastern Tropical North Atlantic during the M156 cruise on the RV Meteor from July 3rd to August 1st 2019. Heterotrophic bacteria, photosynthetic bacteria (Prochlorococcus and Synechococcus), and autotrophic pico and nanoplankton (&lt;20 μm) abundances were measured by flow cytometry.
DOI: 10.1594/pangaea.950371
title: Community respiration at 22°C and semi-labile dissolved organic carbon measured from water bottle samples during METEOR cruise M156

description: This dataset includes measured and calculated data over the epipelagic layer (0-200 m depth) of 25 stations with 14 of them inside or in the vicinity of a cyclonic eddy that formed off Mauritania along the ∼ 900 km zonal corridor between Mauritania and the Cabo Verde islands in the eastern Tropical North Atlantic during the M156 cruise on the RV Meteor from July 3rd to August 1st 2019. To estimate the fraction of semi-labile dissolved organic carbon, we determined high-molecular-weight (&gt;1 kDa) dissolved combined carbohydrates (dCCHO) based on Engel and Händel (2011, https://doi.org/10.1093/plankt/fbq122) and dissolved hydrolysable amino acids (dHAA) based on Lindroth and Mopper (1979, https://https://doi.org/10.1021/ac50047a019) and Dittmar et al, (2009). The analysis of DCCHO detected 11 monomers: and the dHAA analysis classified 13 monomers. The calculations for the carbon content of dCCHO and dHAA were based on carbon atoms contained in the identified monomers. The sum of dCCHO and dHAA carbon content is referred to as SL-DOC. Community respiration was obtained from optode-based method from incubations by measuring changes in dissolved oxygen over 24–36 h. Community respiration and bacterial biomass production were converted to rates at 22°C using equations from Regaudie-De-Gioux and Duarte (2012, https://doi.org/10.1029/2010GB003907) and from López-Urrutia and Morán (2007, https://doi.org/10.1890/06-1641) respectively. Community respiration rates were converted to bacteria respiration rates based on Aranguren-Gassis et al, (2012, https://doi.org/10.3354/meps09707).
DOI: 10.1594/pangaea.950988
title: Extrapolation of ex-situ bacterial production and community respiration rates at 22°C from incubations with water bottle samples from METEOR cruise M156

description: This dataset includes measured and calculated data over the epipelagic layer (0-200 m depth) of 25 stations with 14 of them inside or in the vicinity of a cyclonic eddy that formed off Mauritania along the ∼ 900 km zonal corridor between Mauritania and the Cabo Verde islands in the eastern Tropical North Atlantic during the M156 cruise on the RV Meteor from July 3rd to August 1st 2019. To extrapolate BP and CR rates to 22°C, we used equations from López-Urrutia and Morán for BP (BPU; 2007) and from Regaudie de Gioux and Duarte for CR (CRRG; 2012). we compared the rates of BP and CR measured ex-situ (BP_ex-situ and CR_ex-situ) with the rates obtained from BPU (BPU_14°C) and CRRG (CRRG_average temperature) at the temperature set during the incubations. References: López-Urrutia and Morá ,2007(https://doi.org/10.1890/06-1641); Regaudie de Gioux and Duarte, 2012 (https://doi.org/10.1029/2010GB003907)
description: BPU=[exp^(-0.589/(kT))× [(2.33 × 10^11 x chl a)/(chl a +4.08)+6.77×10^9 ]]× Heterotrophic Bacteria abundance. Temperature and resource availability effects on cell-specific bacterial metabolism, with k, the Boltzmann's constant (8.617734 10^-5 eV/K), T the water temperature (°K), chl a, the in-situ chlorophyll a concentration in µg/L and in-situ heterotrophic bacteria abundance (HB) in cell/LLn^((CR_RG/(chl a )))= -0,66×(1/kT)+27,72CR_RG =exp^(Ln^((CR/(chl a ))) )× chl a. The linear relationship between the natural logarithm of the volumetric specific chlorophyll a-CR rates (CR/chla) in mmol O2/(mg Chl a* day) within 1°C bin and the inverted water temperature (1/kT) with k, the Boltzmann's constant (8.617734 10-5 eV/K) and with T, the water temperature (°K). CRRG (µmol O2/ (L x day) was then obtained from the exponential of the natural logarithm of the volumetric specific chlorophyll a-CR rates multiplied by the in-situ chlorophyll a (Chl a in µg/L).The rates obtained from the equations (BPU_14°C and CRRG_incubation temperature) were significantly correlated (Fig. S3 in the supplement) and within the ranges of the rates measured with ex-situ incubations (BPex-situ and CRex-situ). Therefore, we used the correlation of BPU_14°C with BPU_22° and CRRG_incubation temperature with CRRG_22°C to extrapolate BP and CR at 22°C: BP_22°C= BP_ex-situ* 1,906; CR_22°C= 2,011*CR_ex-situ - 0,013
DOI: 10.1594/pangaea.928050
title: Seismic horizon interpretations from the Tuaheni Landslide Complex (New Zealand)

description: These seismic horizon interpretations we made from the seismic reflection data described in https://doi.pangaea.de/10.1594/PANGAEA.927990, using IHS Kingdom Suite software (Version 2019)
DOI: 10.1594/pangaea.950368
title: Heterotrophic bacterial abundance, bacterial respiration and production measured from water bottle samples during METEOR cruise M156

description: This dataset includes measured and calculated data over the epipelagic layer (0-200 m depth) of 25 stations with 14 of them inside or in the vicinity of a cyclonic eddy that formed off Mauritania along the ∼ 900 km zonal corridor between Mauritania and the Cabo Verde islands in the eastern Tropical North Atlantic during the M156 cruise on the RV Meteor from July 3rd to August 1st 2019. Bacterial biomass production rates were measured through the incorporation of labelled leucine (3H) using the microcentrifuge method (Kirchman et al., 1985, https://doi.org/10.1128/aem.49.3.599-607.1985; Smith and Azam, 1992). Bacteria carbon demand and growth efficiency were calculated from bacterial production and respiration rates. Dittmar, T., Cherrier, J., and Ludwichowski, K. U.: The analysis of amino acids in seawater, in: Practical guidelines for the analysis of seawater, edited by: Wurl, O., 67–78, CRC Press, Boca Raton, ISBN: 978-1-4200-7306-5, 2009. Evans, C. A., O'Reily, J. E., and Thomas, J. P.: A handbook for measurement of Chl a and primary production, College Station, TX, Texas A and M University, ISBN:9780948277078, 0948277076, 1987. Gargas, E.: A Manual for Phytoplankton Primary Production Studies in the Baltic, The Baltic Marine Biologists, 2, 88 pp. Ed. Gargas E. (Hørsholm, Denmark: Water Quality Institute), 1975. Smith, D. and Azam, F.: A simple, economical method for measuring bacterial protein synthesis rates in seawater using, Mar. Microb. Food Webs, 6, 107–114, 1992.
description: Bacterial production was convert from leucine/kg to µmol/L using a conversion factor of 1.55 kgC/mol of Leucine. BP and CR ex-situ rates were recalculate to 22°C. BR_22°C was obtained from CR at 22°C.
DOI: 10.1594/pangaea.950356
title: Temperature, salinity and oxygen measured on CTD water bottle samples during METEOR cruise M156

description: This dataset includes measured and calculated data over the epipelagic layer (0-200 m depth) of 25 stations with 14 of them inside or in the vicinity of a cyclonic eddy that formed off Mauritania along the ∼ 900 km zonal corridor between Mauritania and the Cabo Verde islands in the eastern Tropical North Atlantic during the M156 cruise on the RV Meteor from July 3rd to August 1st 2019. Temperature, salinity, and oxygen were obtained from a Seabird 911 plus CTD system equipped with two independently working sets of temperature–conductivity–oxygen.
DOI: 10.1594/pangaea.918159
title: Satellite-derived euphotic depth for site 13M4
DOI: 10.15468/dl.2ecbmz
title: Occurrence Download

description: A dataset containing 33445 species occurrences available in GBIF matching the query:
{
 "and" : [
 "BasisOfRecord is one of (Observation, Machine Observation, Human Observation, Material sample, Material citation, Specimen, Living Specimen, Occurrence evidence)",
 "GadmGid is one of (USA.10_1, USA.11_1, USA.41_1, USA.1_1, USA.34_1, USA.25_1, USA.43_1)",
 "HasCoordinate is true",
 "HasGeospatialIssue is false",
 "OccurrenceStatus is Present",
 "TaxonKey is one of (Quercus shumardii Buckley, Pleopeltis michauxiana (Weath.) Hickey & Sprunt, Ulmus rubra Muhl., Ulmus alata Michx., Quercus velutina Lam., Tilia americana L., Arisaema triphyllum (L.) Schott, Lonicera japonica Thunb.)",
 "Year 1980-2025"
 ]
}

 The dataset includes 33445 records from 102 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0015113-250515123054153/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.918160
title: Satellite-derived euphotic depth for site 13M5
DOI: 10.1594/pangaea.918167
title: Surface Chl a concentrations of the western tropical North Atlantic where mooring sites M4 and M5 were located

description: Start Date: 2002-07-03T00:00:00ZEnd Date: 2019-06-24T23:59:59ZBounding Box: -50,11,-48,13Bounding Box: -49.9792,11.0208,-48.0208,12.9792
DOI: 10.15468/dl.tjpsyj
title: Occurrence Download

description: A dataset containing 90993 species occurrences available in GBIF matching the query:
{
 "TaxonKey" : [
 "is Brassica napus L."
 ]
}

 The dataset includes 90993 records from 1189 constituent datasets; see https://api.gbif.org/v1/occurrence/download/0015107-250515123054153/datasets/export for details.
 
Data from some individual datasets included in this download may be licensed under less restrictive terms.
DOI: 10.1594/pangaea.903558
title: Depth-dependent abundance of Tridacna maxima giant clams at station 1 in the Central Red Sea
DOI: 10.1594/pangaea.961798
title: Turbulent microstructure profile (MSS) measurements from the MOSAiC drift, Arctic Ocean, version 2

description: During the year-long drift expedition MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) from September 2019 to September 2020, we obtained an unprecedented data set of vertical turbulent dissipation rate profiles and high resolved hydrodynamic properties, including oxygen concentration and fluorescence, also covering the winter season. Nearly 1,700 individual profiles, covering the upper ocean down to approximately 400~m, were collected on a near-daily base and complemented with several periods of intensified continuous sampling.Version 2: To ensure the quality of the dataset, we compared the MSS data to the Polarstern and Ocean City CTD data, which provide the only in-situ calibrated measurements of salinity. As casts of two different instruments were rarely co-located, this comparison was done statistically, i.e., by comparing as many as possible pairs of casts closest in time. Most data channels are found to agree well, with the exception of the casts performed with the profiler MSS055, which was mostly used during leg 3 and was equipped with a substitute conductivity sensor. For this probe, a calibration cast was performed with the MSS attached to the Ocean City CTD on February 2, 2020, which showed a constant offset in conductivity of 0.11 mS/cm. After reprocessing the affected data with this offset correction, values were in good agreement with the CTD data. In addition, we calibrated the dissolved oxygen readings from MSS091 (used during legs 4 and 5) with the CTD data.
DOI: 10.1594/pangaea.933786
title: Oxygen production assays in bentho-pelagic mesocosms and the Zingster Strom (southern Baltic Sea) in 2014

description: This data set contains the measured oxygen saturation concentration, and the calculated oxygen concentration corrected for temperature and salinity (according to Benson and Krause, 1984) of one ecosystem site (Zingster Strom, Darss-Zingst lagoon system, southern Baltic Sea) and six bentho-pelagic mesocosms close by. Temperature correction was based on simultaneous measured temperature values, salinity stayed constant in the mesocosms, and salinity correction in the ecosystem was based on daily values. The mesocosms were either phytoplankton, or macrophyte dominated (each n = 3). Measurement intervals were every 5 min (mesocosms) to 10 min (ecosystem). Additionally, Chlorophyll a were included where available and reported as daily values (Zingster Strom n= 365, mesocosms each n = 10), or fitted values (mesocosms, based on available daily values).
description: Calculation of oxygen concentrations:* Temperature correction based on simultanously measured values at all sites* Salinity correction based on constant sallinity in mesocosms (fixed O2-correction) & daily monitoring values in Zingster Strom (daily O2-correction)
DOI: 10.1594/pangaea.969037
title: Dinoflagellate cyst counts from sediment samples along a land-sea transect off Cape Blanc NW Africa (Maria S. Merian cruise MSM79)

description: Dinoflagellate cyst counts obtained in surface sediment samples collected along a shelf break-offshore transect in the upwelling region off Cape Blanc (NW Africa) are presented. Data was collected in November 2018 during the cruise Maria S. Merian MSM 79. New data on organic-walled dinoflagellate cysts in sediments were compared to cyst distributions in the water column and environmental parameters to investigate the cyst dispersal and accumulation patterns in deep-marine environments, detect possible cyst resuspension and other factors affecting cyst distribution in the water column and identify possible environmental signals in the sediment cyst assemblages.Surface sediments (0-1 cm) were collected at 12 stations using a multi-core system. They were frozen at -20°C immediately after recovery. In the laboratory, sediment samples were subsampled (1 ml) and oven-dried (60 ºC for 24-48 h) to determine the dry bulk density. A known volume of each sample was processed using standard palynological techniques as described in Zonneveld et al. (2012). It included acidic digestion of carbonates (HCl 10%) and silicates (HF 40%). Cysts were concentrated by sonication and sieving through stainless steel meshes (fraction recovered &lt;125 μm and &gt;20 μm). Several cycles of sonication (~3 min each) and washing through the meshes with tap water were applied until the material was clean. Material was further concentrated by centrifugation (5 min at 3500 rpm) and transferred to Eppendorf tubes. The final volumes were adjusted to 0.5 to 1 ml, depending on the amount of organic content. Permanent slides were prepared by using the aliquot method to allow the determination of cyst concentrations. Slides were observed under a Zeiss Axioskop R5111 light microscope at x400 and x1000 magnifications, and all dinoflagellate cysts were identified and counted at the lowest possible taxonomic level.
DOI: 10.1594/pangaea.973495
title: Gasterosteus aculeatus clutch size, average egg size diameter per clutch, fertilization success, hatching success and maternal size depending on parental heatwave treatment

description: We measured several fecundity traits for each clutch of fertilized eggs including clutch size (total number of eggs), average egg size (diameter (mm)), fertilization success and hatching success. The diameter (mm) of all eggs in a clutch was measured to estimate average egg size.
DOI: 10.1594/pangaea.973497
title: Gasterosteus aculeatus egg size diameter and area of all eggs in a clutch, as well as clutch size depending on parental heatwave treatment
DOI: 10.1594/pangaea.973493
title: Length and weight of F0 wild-caught adults Gasterosteus aculeatus (males and females) used for breeding in heatwave experiment

description: Fish were brought to the laboratory at the AWI Wadden Sea Station Sylt and used as breeding adults for a multi-generation laboratory experiment investigating the effects of marine heatwaves on stickleback fitness-related traits. These F0 generation wild-caught adults (males and females) were acclimated to three heatwave scenarios (no heatwave control, single heatwave or double heatwave) for three months before breeding (starting 12 June 2022) via artificial fertilization.
DOI: 10.1594/pangaea.937712
title: Monitoring of the growth of phytoplankton batch cultures in part 1 (dissolved organic matter release) of the microcosm experiment, Gulf of Finland, Baltic Sea

description: The data were collected from an experiment using phytoplankton cultures (Apocalathium malmogiense and Rhodomonas marina). The aim of the experiment was to study carbon cycling among phytoplankton and bacteria, and the effects on the dissolved organic matter (DOM) pool. The experiment was conducted at Tvärminne Zoological Station, Hanko, Finland with non-axenic unialgal phytoplankton cultures and bacteria originating from the Baltic Sea. The experiment was conducted between Dec. 2017 and Apr. 2018. The experiment consisted of two parts, the DOM release experiment (part 1) and the DOM consumption experiment (part 2). Separate triplicate batch cultures of both phytoplankton species were grown for each experiment. In the DOM release experiment the cultures were grown for over 4 months and three day-long incubations (key point incubations, KPI's) were initiated on three occasions; the first KPI at early exponential growth phase and the second and third KPI's when the phytoplankton had grown more abundant. This data table contains measurements collected during monitoring of the growth of phytoplankton batch cultures in part 1 of the experiment (DOM release experiment), i.e., before and in between of the KPIs. These phytoplankton cultures were used in the three key point incubations of the DOM release experiment. The variables measured during the monitoring, and included in this data file, are phytoplankton abundance, abundance of A. malmogiense cells with lower chlorophyll a fluorescence, percentage of phytoplankton cells with intact membranes, and optical properties of DOM. The experimental design is explained in figure 1 of the associated publication.
DOI: 10.1594/pangaea.931928
title: Sea floor depth under Ekström Ice Shelf, Antarctica, from seismic vibroseis surveys 2010-2018

description: Sea floor depth under Ekström Ice Shelf, Antarctica - from seismic reflection profiles collected between 2010 and 2018. For each seismic profile, the reflection time of the sea floor and ice-shelf base was identified and the depth to the sea floor was calculated using an ice velocity of 3601 m/s a sea-water velocity of 1451 m/s. The depths are referenced to mean sea-level (geoid EIGEN-6C4 ).The seismic data used here were collected using two different seismic vibroseis sources. The same snow streamer was used for all data acquisition - a 1500 m long, 60 channel snow streamer, with 25 m group spacing. Each group contains eight gimballed P-wave SM-4, 14 Hz geo-phones. Please note these data are the point data used to create the gridded bathymetry product of the region, found here: doi:10.1594/PANGAEA.907951Details of data acquisition and processing are given here: doi:10.1029/2019GL086187.
description: Seismic derived sea-floor depth picks Data from AWI vibroseis seismic surveys ek2010, ek2011, ek2104, ek2017, ek2018Details and data reference: Smith et. al, 2020Brief processing notes: Seismic arrival times were converted to depth using an ice velocity of 3601m/s and a water velocity of 1451m/s. Depths were corrected for surface elevation using the REMA model, re-reference to the EIGEN6C4 Geoid, i.e. Bed = seismic depth - REMA surface elevation - geoid correction
DOI: 10.1594/pangaea.939816
title: Turbulent microstructure profile (MSS) measurements from the MOSAiC drift, Arctic Ocean

description: During the year-long drift expedition MOSAiC (Multidisciplinary drifting Observatory for the Study of Arctic Climate) from September 2019 to September 2020, we obtained an unprecedented data set of vertical turbulent dissipation rate profiles and high resolved hydrodynamic properties, including oxygen concentration and fluorescence, also covering the winter season. Nearly 1,700 individual profiles, covering the upper ocean down to approximately 400~m, were collected on a near-daily base and complemented with several periods of intensified continuous sampling.
DOI: 10.1594/pangaea.972746
title: Sediment biogeochemistry and diatom assemblages in dated sediment core from lake Teremendo (Michoacán, Mexico)

description: This dataset comprises multiproxy biogeochemical data and diatom assemblage data for a sediment sequence (LTe22-1) from lake Teremendo (Michoacán, Mexico). The data were used to explore connections between lake carbon cycling and related ecosystem processes under natural and anthropogenic environmental change over the past four centuries. The sediment core (155 cm in length) was retrieved with a Uwitec corer near the middle of the lake basin (water depth ~8 m) in April 2022. After initial core scanning, the sediment core was sectioned at 5-mm intervals. The data are provided for these discrete sediment sections from 0 cm down to the depth of 46.5 cm, covering a time period from 2022 to around 1650. Age estimates for each sediment section have been calculated based on radiolead (Pb-210) dating of the surface sediment sections and four radiocarbon (C-14) measurements. Diatom data include taxa present with at least 0.5% relative abundance in any sample.
DOI: 10.1594/pangaea.972747
title: High-resolution core scanning data (X-ray fluorescence and computed tomography) in dated sediment core from lake Santa Maria del Oro (Nayarit, Mexico)

description: This dataset comprises high-resolution biogeochemical data for a sediment sequence (LSMo22-1) from lake Santa Maria del Oro (Nayarit, Mexico). The data were used to explore connections between lake carbon cycling and related ecosystem processes under natural and anthropogenic environmental change over the past four centuries. The sediment core (97 cm in length) was retrieved with a Uwitec corer near the middle of the lake basin (water depth &gt;50 m) in April 2022. Prior to sediment sectioning, the core was analysed with Itrax X-ray fluorescence core scanning and X-ray computed tomography with 500 microns step size. The scan data are provided from the sediment surface down to the depth of 34.15 cm, covering a time period from 2022 to around 1650. Age estimates for each sediment section have been calculated based on radiolead (Pb-210) dating of the surface sediment sections and three radiocarbon (C-14) measurements. Elemental intensities have been centered log-ratio (clr) transformed and all elemental data have been min-max normalized.