cometadata/datacite-titles-descriptions-related-identifiers huggingface dataset:
DOI: 10.1594/pangaea.855122
title: Snow cover trend analysis 2000-2011, Central Yakutia, Siberia

description: Snow cover was analyzed using the MOD10CM product (Hall et al., 2006), which is also configured on a 0.05° latitude/longitude MODIS Climate Model Grid (CMG), yielding figures for monthly average snow cover (as percentages). (See also "Source data set" link). It was downloaded from ftp://n5eil01u.ecs.nsidc.org/pub/MOST/MOD10CM.005 for the Years 2000 to 2011.Linear trend calculations for the 11 year interval were performed separately for each bi-monthly mean value in each grid cell, using the least squares method. We decided to use two-monthly intervals since the timing of thawing and freezing vary from year to year and do not necessarily occur over just one month in the year, or in the same month each year. We used a student t-test to calculate the significance of each trend, based on the assumption that there was no relationship between the date and the trend (null hypothesis).The file snow_bimonthly_trends_2000-2011.zip contains six single maps (ascii-files) who show the trend for two month intervals over the 11 year interval ('grad_snow_janfeb', 'grad_snow_marapr','grad_snow_mayjun', 'grad_snow_julaug', 'grad_snow_sepoct', 'grad_snow_novdec').The file snow_monthly_trends_2000-2011.zip contains twelve single maps who show the trend in snow for single months over the 11 year interval ('grad_snow_mar', 'grad_snow_apr', 'grad_snow_may', 'grad_snow_jun', 'grad_snow_jul', 'grad_snow_aug', 'grad_snow_sep', 'grad_snow_oct', 'grad_snow_nov', 'grad_snow_dec', 'grad_snow_jan', 'grad_snow_feb').The files snow_t_p_bimonthly.zip and snow_t_p_monthly.zip contain the corresponding p-values of the statistical t-tests for the bimonthly and monthly trends , respectively.The snow_TtestIsolines.zip files contains the isolines (as ESRI shapefiles) from the t-test for 75%, 90%, 95% and 97.5% confidence intervals for the bimonthly intervals of April/May and September/October.All files have an extent of WGS84, upper left corner: lat 65, long 117.55, lower right corner: lat 61.05, long 131.05.
DOI: 10.1594/pangaea.873538
title: Experiment on bacterial resistance: Bacterial twitching motility on vibrio strains
DOI: 10.1594/pangaea.811073
title: Net lateral flow at station INT3 on Samoylov Island
DOI: 10.1594/pangaea.811074
title: Net lateral flow at station OUT1 on Samoylov Island
DOI: 10.1594/pangaea.823198
title: Impacts of seawater acidification on mantle gene expression patterns of the Baltic Sea blue mussel: implications for shell formation and energy metabolism, link to supplementary material

description: Marine organisms have to cope with increasing CO2 partial pressures and decreasing pH in the oceans. We elucidated the impacts of an 8-week acclimation period to four seawater pCO2 treatments (39, 113, 243 and 405 Pa/385, 1,120, 2,400 and 4,000 µatm) on mantle gene expression patterns in the blue mussel Mytilus edulis from the Baltic Sea. Based on the M. edulis mantle tissue transcriptome, the expression of several genes involved in metabolism, calcification and stress responses was assessed in the outer (marginal and pallial zone) and the inner mantle tissues (central zone) using quantitative real-time PCR. The expression of genes involved in energy and protein metabolism (F-ATPase, hexokinase and elongation factor alpha) was strongly affected by acclimation to moderately elevated CO2 partial pressures. Expression of a chitinase, potentially important for the calcification process, was strongly depressed (maximum ninefold), correlating with a linear decrease in shell growth observed in the experimental animals. Interestingly, shell matrix protein candidate genes were less affected by CO2 in both tissues. A compensatory process toward enhanced shell protection is indicated by a massive increase in the expression of tyrosinase, a gene involved in periostracum formation (maximum 220-fold). Using correlation matrices and a force-directed layout network graph, we were able to uncover possible underlying regulatory networks and the connections between different pathways, thereby providing a molecular basis of observed changes in animal physiology in response to ocean acidification.
description: Mytilus edulis mantle tissue samples taken for this experiment derived from a previous acclimation experiment (Thomsen and Melzner, 2010, doi:10.1007/s00227-010-1527-0). See further details link for data.
description: Supplement to: Hüning, Anne K; Melzner, Frank; Thomsen, Jörn; Gutowska, Magdalena A; Krämer, Lars; Frickenhaus, Stephan; Rosenstiel, Philip; Pörtner, Hans-Otto; Philipp, Eva E R; Lucassen, Magnus (2013): Impacts of seawater acidification on mantle gene expression patterns of the Baltic Sea blue mussel: implications for shell formation and energy metabolism. Marine Biology, 160(8), 1845-1861
DOI: 10.1594/pangaea.873539
title: Experiment on bacterial resistance: Bacterial lysis time on vibrio strains
DOI: 10.1594/pangaea.833018
title: Experiment: rapid resistance evolution to local Vibrio spp. in invasive Pacific oysters: larvae
DOI: 10.1594/pangaea.873699
title: Genetic structure of Baltic Mytilus populations

description: While secondary contact between Mytilus edulis and M. trossulus in North America results in mosaic hybrid zone formation, both species form a hybrid swarm in the Baltic. Despite pervasive gene flow, Baltic Mytilus species maintain substantial genetic and phenotypic differentiation. Exploring mechanisms underlying the contrasting genetic composition in Baltic Mytilus species will allow insights into processes such as speciation or adaptation to extremely low salinity. Previous studies in the Baltic indicated that only weak interspecific reproductive barriers exist and discussed the putative role of adaptation to environmental conditions. Using a combination of hydrodynamic modelling and multilocus genotyping we investigate how oceanographic conditions influence passive larval dispersal and hybrid swarm formation in the Baltic. By combining our analyses with previous knowledge we show a genetic transition of Baltic Mytilus species along longitude 12°-13°E, i.e. a virtual line between Malmö (Sweden) and Stralsund (Germany). Although larval transport only occurs over short distances (10-30 km), limited larval dispersal could not explain the position of this genetic transition zone. Instead, the genetic transition zone is located at the area of maximum salinity change (15 to 10 psu). Thus, we argue that selection results in weak reproductive barriers and local adaptation. This scenario could maintain genetic and phenotypic differences between Baltic Mytilus species despite pervasive introgressive hybridization.
description: Raw allele data for 5 nuclear and one mitochondrial marker underlying analysis of hybrid status of Baltic mytilid mussels. ME = Mytilus edulisMT = Mytilus trossulusMG = Mytilus galloprovincialis100=ME-allele, 200=MT-allele, 300=MG-alleleFE = M. edulis F genome; FL = M.edulis F genome length variant
description: Supplement to: Stuckas, Heiko; Knöbel, Loreen; Schade, Hanna; Breusing, Corinna; Hinrichsen, Hans-Harald; Bartel, Anja; Langguth, Klaudia; Melzner, Frank (2017): Combining hydrodynamic modelling with genetics: Can passive larval drift shape the genetic structure of Baltic Mytilus populations? Molecular Ecology
DOI: 10.1594/pangaea.811075
title: Discharge at station Q on Samoylov Island
DOI: 10.1594/pangaea.811076
title: Evapotranspiration and precipitation at station TOWER on Samoylov Island
DOI: 10.1594/pangaea.811077
title: Net lateral flow at station TRO2 on Samoylov Island
DOI: 10.1594/pangaea.811078
title: Net lateral flow at station TRO3 on Samoylov Island
DOI: 10.1594/pangaea.874229
title: Experiment on bacterial resistance: Phage-bacteria infection matrix
DOI: 10.1594/pangaea.833019
title: Experiment: rapid resistance evolution to local Vibrio spp. in invasive Pacific oysters: virulence
DOI: 10.1594/pangaea.868927
title: PREFCLIM: A high-resolution mixed-layer climatology of the eastern tropical Atlantic

description: PREFCLIM is a mixed-layer climatology for the Eastern Tropical Atlantic. The climatology contains a high-resolution (0.25 degrees) monthly-mean mixed-layer hydrography (mixed-layer depth, temperature, salinity), and coarse-resolution (2.5 degrees) estimates of the mixed-layer heat and salt balance, as well as of near-surface velocities and of air-sea fluxes. All existing hydrographic products of the region were hampered by the sparse availability of near-shore data owned by the West-African coastal countries, which could, however, be included in the new climatology.
DOI: 10.1594/pangaea.871804
title: Effects of seawater calcium on calcification in mussel larvae

description: Experiments were performed to test the effect of seawater [Ca2+] on the formation rate of the larval prodissoconch I shell in 'Baltic mussels in combination with modified carbonate chemistry.In addition, [Ca2+] of the extrapallial fluid were measured in depdendency of the seawater [Ca2+].These experimental data were correlated with the [Ca2+] present in the Baltic Sea.
description: Supplement to: Thomsen, Jörn; Ramesh, Kirti; Sanders, Trystan; Bleich, Markus; Melzner, Frank (2018): Calcification in a marginal sea - influence of seawater [Ca2+] and carbonate chemistry on bivalve shell formation. Biogeosciences, 15(5), 1469-1482
DOI: 10.1594/pangaea.895933
title: X-ray fluorescence elemental analysis results from the sediment core RK12, Lake Kushu, Rebun Island, northern Japan
DOI: 10.1594/pangaea.895995
title: Meteorological records by the Marquis of Ureña: Cádiz (1803)

description: In this file, a transcription of the meteorological records by the Marquis of Ureña (Cádiz, 1803) is made.
description: Supplement to: Vaquero, José Manuel; Gallego, María Cruz; García, José Agustín (2003): Observaciones meteorológicas en San Fernando (España) durante 1803. 3° Simpósio de Meteorologia e Geofisica da Associaçao Portuguesa de Meteorologia e Geofisica, Aveiro (Portugal), 179-184
DOI: 10.1594/pangaea.754741
title: (Table 3b) Species composition and biomass of ichthyoplankton in near-surface night catches in the Western Pacific
DOI: 10.1594/pangaea.811084
title: Hydraulic conductivity at station RIM on Samoylov Island
DOI: 10.1594/pangaea.895934
title: Methodology, results and calibration of X-ray fluorescence analysis from the sediment core RK12, Lake Kushu, Rebun Island, northern Japan, links to files
DOI: 10.1594/pangaea.788453
title: Ratio of Diene/Triene of sediment core NBP01-01-JPC24

description: Micropaleontological and biomarker data from two high-accumulation marine sites from the Coastal and Continental Shelf Zone (CCSZ) off East Antarctica (Adélie Land at w140°E and eastern Prydz Bay at w77°E) are used to reconstruct Holocene changes in sea ice and wind stress at the basin-wide scale. These data demonstrate congruent increase in sea-ice concentration/persistence and wind stress-related sea-surface turbulence in the two regions since 7 cal ka BP, with a particularly strong signal since 4.5 - 3.5 cal ka BP. Comparison of these high latitude records with sea ice and turbulence records from the southern mid-latitudes highlights distinctive climatic evolutions according to the different latitudinal bands. Sea-ice persistence and turbulence increase in East Antarctica CCSZ are opposite to sea-surface warming and sea-ice retreat recorded after 4.5 - 3.5 cal ka BP in the East Atlantic and Indian sector between 55 and 45°S. At the same period, paleodata suggest SST cooling in all major coastal upwelling systems of the southern hemisphere, caused by the northward transport of subpolar surface waters as a response to southern Westerlies reinforcement. We therefore propose, as suggested for the northern hemisphere, that Holocene changes in the latitudinal insolation gradient, primarily forced by obliquity and precession and amplified by sea-ice and glacial-ice expansions in the Antarctic realm, are responsible for the observed contrasted latitudinal patterns of southern latitudes.
description: Age is given in calendar years BP.Data were obtained within the framework of ERC StG ICEPROXY project (Grant number: 203441) and ANR CLIMICE project (ANR-08-CEXC-012-01), provided for the data compilation of the Past4Future Project.
DOI: 10.1594/pangaea.844552
title: (Figure 6A) Proton gradients at different locations on the entire surface of squid embryos
DOI: 10.1594/pangaea.881867
title: Carbonate chemistry at the site of mineralization in mussel larvae: shell length
DOI: 10.1594/pangaea.844554
title: (Figure 6B) Inhibitory effects on proton secretion in control and treated samples
DOI: 10.1594/pangaea.855424
title: Grain size composition of sediment core THU10-Mastercore
DOI: 10.1594/pangaea.877949
title: Fig. 1b - Continuously measured seawater pCO2 in summer 2012 in Kiel Fjord
DOI: 10.1594/pangaea.877950
title: Fig. 1c - Mussel larval settlement intensity on panels between July and September
DOI: 10.1594/pangaea.824609
title: Predicted probability of pacific oysters experiment
DOI: 10.1594/pangaea.836236
title: Intraspecific facilitation by allelochemical mediated grazing protection within a toxigenic dinoflagellate population, link to supplementary material

description: Dinoflagellates are a major cause of harmful algal blooms, with consequences for coastal marine ecosystem functioning and services. Alexandrium tamarense is one of the most abundant and widespread toxigenic species in the temperate northern and southern hemisphere, and produces paralytic shellfish poisoning toxins as well as lytic allelochemical substances. These bioactive compounds may support the success of A. tamarense and its ability to form blooms. Here we investigate the impact of grazing on monoclonal and mixed set-ups of highly (Alex2) and moderately (Alex4) allelochemically active A. tamarense strains and on a non-allelochemically active conspecific (Alex5) by the heterotrophic dinoflagellate Polykrikos kofoidii. While Alex4 and particularly Alex5 were strongly grazed by P. kofoidii when offered alone, both strains grew well in the mixed assemblages (Alex4+Alex5 and Alex2+Alex5). Hence, the allelochemical active strains facilitated growth of the non-active strain by protecting the population as a whole against grazing. Based on our results, we argue that facilitation among clonal lineages within a species may partly explain the high genotypic and phenotypic diversity of Alexandrium populations. Populations of Alexandrium may comprise multiple cooperative traits that act in concert with intraspecific facilitation, and hence promote the success of this notorious harmful algal bloom species.
description: Supplement to: John, Uwe; Tillmann, Urban; Hülskötter, Jennifer; Alpermann, Tilman J; Wohlrab, Sylke; Van de Waal, Dedmer B (2014): Intraspecific facilitation by allelochemical mediated grazing protection within a toxigenic dinoflagellate population. Proceedings of the Royal Society B-Biological Sciences, 282(1798), 9 pp
DOI: 10.1594/pangaea.869129
title: Individual codes, GenBank accession numbers and GenBank accession links for marine sponge-associated microbial metagenomes

description: Dataset contains metainformation to the samples used in the given pulication: links to Bioprojects, Biosamples, metagenome assemblies and raw data.
description: Supplement to: Horn, Hannes; Slaby, Beate M; Jahn, Martin T; Bayer, Kristina; Moitinho-Silva, Lucas; Förster, Frank; Abdelmohsen, Usama Ramadan; Hentschel, Ute (2016): An Enrichment of CRISPR and Other Defense-Related Features in Marine Sponge-Associated Microbial Metagenomes. Frontiers in Microbiology, 7:1751
DOI: 10.1594/pangaea.833016
title: Experiment: rapid resistance evolution to local Vibrio spp. in invasive Pacific oysters: adults
DOI: 10.1594/pangaea.833017
title: Experiment: rapid resistance evolution to local Vibrio spp. in invasive Pacific oysters: immune parameter
DOI: 10.1594/pangaea.896089
title: CICE output from Global Ocean Forecast System (GOFS) 3.1 for 2018111312

description: INITIALIZATION: 2018111312FORECASTS:12-hrly out to 7.5 days (t180)GRIDS:ARCu0.08 -- poleward of 40NANTu0.08 -- poleward of 49.52SPARAMETERS:hi:standard_name = "sea_ice_thickness" ;hs:standard_name = "surface_snow_thickness" ;Tsfc:standard_name = "surface_temperature_where_sea_ice" ;aice:standard_name = "sea_ice_area_fraction" ;uvel:standard_name = "eastward_sea_ice_velocity" ;vvel:standard_name = "northward_sea_ice_velocity" ;sst:standard_name = "sea_water_temperature" ;uocn:standard_name = "eastward_sea_water_velocity" ;vocn:standard_name = "northward_sea_water_velocity" ;Tair:standard_name = "air_temperature" ;strength:standard_name = "compressive_strength_of_sea_ice" ;
DOI: 10.1594/pangaea.868901
title: Pacific oyster survival measured during infection experiments
DOI: 10.1594/pangaea.834314
title: (Table S2C) Contamination of purified diatom samples with non-biogenic silicates estimated from SiO2 and Al2O3 percentages determined by EDS of sediment core MD01-2416
DOI: 10.1594/pangaea.858067
title: A sea urchin Na+K+2Cl- cotransporter is involved in the maintenance of calcification-relevant cytoplasmic cords in Strongylocentrotus droebachiensis larvae

description: The cellular mechanisms of calcification in sea urchin larvae are still not well understood. Primary mesenchyme cells within the larval body cavity form a syncytium to secrete CaCO3 spicules from intracellular amorphous CaCO3 (ACC) stores. We studied the role of Na+K+2Cl- cotransporter (NKCC) in intracellular ACC accumulation and larval spicule formation of Strongylocentrotus droebachiensis. First, we incubated growing larvae with three different loop diuretics (azosemide, bumetanide, and furosemide) and established concentration-response curves. All loop diuretics were able to inhibit calcification already at concentrations that specifically inhibit NKCC. Calcification was most effectively inhibited by azosemide (IC50 = 6.5 µM), while larval mortality and swimming ability were not negatively impacted by the treatment. The inhibition by bumetanide (IC50 = 26.4 µM) and furosemide (IC50 = 315.4 µM) resembled the pharmacological fingerprint of the mammalian NKCC1 isoform. We further examined the effect of azosemide on the maintenance of cytoplasmic cords and on the occurrence of calcification vesicles using fluorescent dyes (calcein, FM1-43). Fifty micromolars of azosemide inhibited the maintenance of cytoplasmic cords and resulted in increased calcein fluorescence within calcification vesicles. The expression of NKCC in S. droebachiensis was verified by PCR and Western blot with a specific NKCC antibody. In summary, the pharmacological profile of loop diuretics and their specific effects on calcification in sea urchin larvae suggest that they act by inhibition of NKCC via repression of cytoplasmic cord formation and maintenance.
description: Supplement to: Basse, Wiebke C; Gutowska, Magdalena A; Findeisen, Ulrike; Stumpp, Meike; Dupont, Sam; Jackson, Daniel J; Himmerkus, Nina; Melzner, Frank; Bleich, Markus (2015): A sea urchin Na+K+2Cl- cotransporter is involved in the maintenance of calcification-relevant cytoplasmic cords in Strongylocentrotus droebachiensis larvae. Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 187, 184-192
DOI: 10.1594/pangaea.834254
title: (Table S1) Elemental compositions determined by EDS and ICP-OES analysis of the 10-20 µm and &gt;63 µm fraction of sediment core MD01-2416
DOI: 10.1594/pangaea.855687
title: (Table 1, page 129) Chemical composition of ferromanganese coating on glacial erratics from Lydonia Canyon

description: Ferromanganese coatings have been found on glacial erratics in Lydonia Canyon, off the United States northeastern coast. The coatings, which are about 17 µm thick, consist of an outer manganese-rich layer which covers the top of the erratic, a middle transitional layer, and an internal iron-rich layer that encircles the entire surface of the erratic. Chemical analyses of the coatings, when compared with similar data on abyssal marine ferromanganese deposits, reveal comparable Mn/Fe ratios, higher P and Ti concentrations, and an order of magnitude less of Co, Ni, Cu, and most other metals. A comparison of the Lydonia Canyon coatings with desert varnishes reveals obvious chemical, mineralogical, and morphological differences.
description: From 1983 until 1989 NOAA-NCEI compiled the NOAA-MMS Marine Minerals Geochemical Database from journal articles, technical reports and unpublished sources from other institutions. At the time it was the most extended data compilation on ferromanganese deposits world wide. Initially published in a proprietary format incompatible with present day standards it was jointly decided by AWI and NOAA to transcribe this legacy data into PANGAEA. This transfer is augmented by a careful checking of the original sources when available and the encoding of ancillary information (sample description, method of analysis...) not present in the NOAA-MMS database.
description: Supplement to: Poppe, L J; O'Leary, D W; Commeau, R F (1985): Composition and morphology of ferromanganese coatings on glacial erratics in Lydonia Canyon, United States East Coast. Geo-Marine Letters, 5(2), 127-133
DOI: 10.1594/pangaea.769887
title: Files related to figures 1 to 13

description: Members of the marine dinoflagellate genus Alexandrium are known to exude allelochemicals, unrelated to well-known neurotoxins (PSP-toxins, spirolides), with negative effects on other phytoplankton and marine grazers. Physico/chemical characterization of extracellular lytic compounds of A. tamarense, quantified by Rhodomonas salina bioassay, showed that the lytic activity, and hence presumably the compounds were stable over wide ranges of temperatures and pH and were refractory to bacterial degradation. Two distinct lytic fractions were collected by reversed-phase solid-phase extraction. The more hydrophilic fraction accounted for about 2% of the whole lytic activity of the A. tamarense culture supernatant, while the less hydrophilic one accounted for about 98% of activity. Although temporal stability of the compounds is high, substantial losses were evident during purification. Lytic activity was best removed from aqueous phase with chloroform-methanol (3:1). A “pseudo-loss” of lytic activity in undisturbed and low-concentrated samples and high activity of an emulsion between aqueous and n-hexane phase after liquid-liquid partition are strong evidence for the presence of amphipathic compounds. Lytic activity in the early fraction of gel permeation chromatography and lack of activity after 5 kD ultrafiltration indicate that the lytic agents form large aggregates or macromolecular complexes.
description: Supplement to: Ma, Haiyan; Krock, Bernd; Tillmann, Urban; Cembella, Allan (2009): Preliminary characterization of extracellular allelochemicals of the toxic marine dinoflagellate Alexandrium tamarense using a Rhodomonas salina bioassay. Marine Drugs, 7(4), 497-522
DOI: 10.1594/pangaea.877948
title: Fig. 1a - Averaged monthly pH values recorded from 2009 to 2011 in the habitats of the two tested populations
DOI: 10.1594/pangaea.896091
title: CICE output from Navy Earth System Model (NESM) for 2018111012

description: INITIALIZATION: 2018111012FORECASTS:daily at 00Z out to 45 days (t1068)GRIDS:ARCu0.08 -- poleward of 40NANTu0.08 -- poleward of 49.52SPARAMETERS:hi:standard_name = "sea_ice_thickness" ;hs:standard_name = "surface_snow_thickness" ;Tsfc:standard_name = "surface_temperature_where_sea_ice" ;aice:standard_name = "sea_ice_area_fraction" ;uvel:standard_name = "eastward_sea_ice_velocity" ;vvel:standard_name = "northward_sea_ice_velocity" ;sst:standard_name = "sea_water_temperature" ;uocn:standard_name = "eastward_sea_water_velocity" ;vocn:standard_name = "northward_sea_water_velocity" ;Tair:standard_name = "air_temperature" ;strength:standard_name = "compressive_strength_of_sea_ice" ;