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  • 1
    facet.materialart.
    Unknown
    PANGAEA
    In:  Supplement to: Glemser, Barbara; Kloster, Michael; Esper, Oliver; Eggers, Sarah Lena; Kauer, Gerhard; Beszteri, Bánk (2019): Biogeographic differentiation between two morphotypes of the Southern Ocean diatom Fragilariopsis kerguelensis. Polar Biology, 42(7), 1369-1376, https://doi.org/10.1007/s00300-019-02525-0
    Publication Date: 2023-10-28
    Description: Valves of the diatom Fragilariopsis kerguelensis, sampled along four North-South transects across the Southern Ocean, were imaged in high resolution, extended depth-of focus light microscopic images. The images were segmented and morphometric features extracted using the software SHERPA.
    Keywords: ANT-XII/4; ANT-XIII/4; ANT-XXVIII/2; ANT-XXXII/2; Campaign of event; Date/Time of event; Event label; File format; File name; File size; Hand net; HN; Latitude of event; Lazarev Sea; Longitude of event; MSN; MUC; MultiCorer; Multiple opening/closing net; Number; Percentage; Polarstern; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; PS103; PS103_11-2; PS103_1-2; PS103_12-1; PS103_14-2; PS103_2-3; PS103_3-2; PS103_4-2; PS103_5-3; PS103_6-2; PS103_7-5; PS103_9-2; PS2686-2; PS2688-4; PS2690-1; PS2692-1; PS2696-4; PS2697-1; PS2699-5; PS2701-2; PS35/135; PS35/141; PS35/151; PS35/154; PS35/162; PS35/166; PS35/177; PS35/186; PS35 06AQANTXII_4; PS40/035-2; PS40/037-2; PS40/038-3; PS40/044-2; PS40/048-2; PS40/050-2; PS40/052-2; PS40/054-4; PS40/056-3; PS40/057-2; PS40/060-2; PS40/062-2; PS40/066-2; PS40 06AQANTXIII_4; PS79; PS79/038-1; PS79/039-2; PS79/041-2; PS79/042-1; PS79/043-1; PS79/044-4; Slide; South Atlantic; South Atlantic Ocean; Southeast Pacific; SPP1158; Uniform resource locator/link to file; Weddell Sea
    Type: Dataset
    Format: text/tab-separated-values, 359 data points
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  • 2
    Publication Date: 2024-03-08
    Description: This raw data of physical oceanography was acquired during research cruise EMB304 of 'RV Elisabeth Mann Borgese' from October 25th to November 02nd 2022. Thereby data was measured by a Seabird SBE911+ as part of a CTD-Rosette. Default onboard CTD system of EMB consists of the SBE9 with 2x SBE43 for oxygen, 2 SBE3 temperature sensors, PAR sensor, altimeter, fluorometer, turbidity meter and a down facing camera to estimate distance to the bottom. The CTD is operated with active heave compensation. Water is sampled with 13 free flow water bottles holding 10l each.
    Keywords: ABBoje; AB Boje; Baltic Sea; BE_UWN; Binary Object; Binary Object (File Size); BS_ADCP; CTD; CTD/Rosette; CTD-RO; CTD-Scanfish; CTD-SF; DAM_Underway; DAM Underway Research Data; Date/Time of event; Elisabeth Mann Borgese; EMB; EMB304; EMB304_10-1; EMB304_1-1; EMB304_11-1; EMB304_12-2; EMB304_14-1; EMB304_16-1; EMB304_20-1; EMB304_2-1; EMB304_22-1; EMB304_23-1; EMB304_25-1; EMB304_27-1; EMB304_29-1; EMB304_30-1; EMB304_3-1; EMB304_32-1; EMB304_34-1; EMB304_36-1; EMB304_38-1; EMB304_40-1; EMB304_4-1; EMB304_4-2; EMB304_42-1; EMB304_44-1; EMB304_46-1; EMB304_48-1; EMB304_5-1; EMB304_52-1; EMB304_52-2; EMB304_52-4; EMB304_52-7; EMB304_53-1; EMB304_55-1; EMB304_57-1; EMB304_6-1; EMB304_7-1; EMB304_8-1; EMB304_9-1; Event label; File content; Latitude of event; Longitude of event; RV ELISABETH MANN BORGESE; SBE-9; Stat. Bets; Stat. FB001; Stat. FB002; Stat. FB003; Stat. FB004; Stat. FB005; Stat. FB006; Stat. TF002; Stat. TF0030; Stat. TF0112; Stat. TF0115; Stat. TF0121; Stat. TF150; TF0001; TF001; TF0030; TF0069; TF 01; TF0113; TF0114; TF 02; TF05; TF 111; TF 115; TF 30
    Type: Dataset
    Format: text/tab-separated-values, 369 data points
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  • 3
    Publication Date: 2024-03-08
    Description: Multibeam bathymetry raw data using the ship's own R2Sonic SONIC 2024 Wideband multibeam echosounder was not continuously recorded during RV ELISABETH MANN BORGESE (EMB) cruise EMB304. Data was recorded on 3 separate days (2022-10-25, 2022-10-29, 2017-10-30. This dataset contains a survey in the Baltic Sea. The system settings of the device were set prior to the cruise and data acquisition was not entirely monitored during the survey time. This publication is conducted within the efforts of the German Marine Research Alliance in the core area 'Data management and Digitalization' (Deutsche Allianz Meeresforschung, DAM). This dataset is considered to be a test dataset for the incorporation of data from EMB into PANGAEA. The software QINSy from QPS was used for data recording. Data is stored with the regular QINSy data format .db and the auxiliary .xtf data format. Data are not compatible with the open source software package MB-System (Caress, D. W., and D. N. Chayes, MB-System: Mapping the Seafloor, http://www.mbari.org/products/research-software/mb-system/, 2022), therefore - as up to this publication date – professional software like CARIS HIPS/SIPS or QPS QIMERA is needed the post-process the data. Thus, individual data files could not be georeferenced by reading out the files itself using open-source software. Data files contained empty spaces " " in the file names. All files had to be renamed using underscores "_", since PANGAEA database does not allow the usage of spaces " " in file names. Data are unprocessed and therefore contain incorrect depth measurements (artifacts). Note that refraction errors can be expected due to the lack of accurate sound velocity profiles (SVP). Overall, it appears that the data quality differs. The gridded hillshade from data acquired on 2022-10-25 showed relatively many obstacles at the slant beams (bad data quality). Data acquired on 2022-10-29 show in general relatively less obstacles (very good data quality) with elongated structures on the seafloor without a distinct pattern. Data acquired on 2022-10-30 show in general a few obstacles (moderate data quality).
    Keywords: Bathymetry; Binary Object; Binary Object (File Size); Binary Object (Media Type); Comment; DAM_Underway; DAM Underway Research Data; Elisabeth Mann Borgese; EMB304; EMB304_0_Underway-3; Multibeam Echosounder; R2Sonic SONIC 2024; R2Sonic SONIC 2024 Wideband multibeam echosounder
    Type: Dataset
    Format: text/tab-separated-values, 64 data points
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  • 4
    Publication Date: 2024-02-16
    Description: Underway temperature and salinity data was collected along the cruise track with two autonomous measurement systems. Usually, the systems are changed after 6 hours. While temperature is taken at the water inlet in about 6.5 m depth, salinity is estimated within the interior measurement container from conductivity and interior temperature. Neither temperature nor salinity calibration was performed. For details to all processing steps see Data Processing Report.
    Keywords: Calculated from internal temperature and conductivity; Conductivity; DAM_Underway; DAM Underway Research Data; DATE/TIME; DEPTH, water; Digital oceanographic thermometer, Sea-Bird, SBE 38; Eddy Stud. IV; LATITUDE; LONGITUDE; Maria S. Merian; Measurement container; MSM114; MSM114_0_Underway-4; Quality flag, salinity; Quality flag, water temperature; Salinity; Seadatanet flag: Data quality control procedures according to SeaDataNet (2010); Temperature, water; Temperature, water, internal; Thermosalinograph; Thermosalinograph, Sea-Bird, SBE 45; TSG
    Type: Dataset
    Format: text/tab-separated-values, 37972 data points
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  • 5
  • 6
    Publication Date: 2023-06-21
    Type: Conference or Workshop Item , NonPeerReviewed
    Format: text
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  • 7
    Publication Date: 2023-07-20
    Description: This SOP describes device configuration, parameter characteristics, transmission and processing of its output, ingest procedure, storage, data access possibilities, and publishing. Intended user groups are device owners, technicians, and data managers.
    Type: Report , NonPeerReviewed
    Format: text
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  • 8
    Publication Date: 2023-07-20
    Description: This SOP describes device configuration, parameter characteristics, transmission and processing of its output, ingest procedure, storage, data access possibilities, and publishing. Intended user groups are device owners, technicians, and data managers.
    Type: Report , NonPeerReviewed
    Format: text
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  • 9
    Publication Date: 2023-07-20
    Description: This SOP describes device configuration, parameter characteristics, transmission and processing of its output, ingest procedure, storage, data access possibilities, and publishing. Intended user groups are device owners, technicians, and data managers.
    Type: Report , NonPeerReviewed
    Format: text
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  • 10
    Publication Date: 2019-06-06
    Description: The diatom species Fragilariopsis kerguelensis is endemic to the Southern Ocean where it plays a key role in the ocean silica cycle due to its heavily silicified cell walls. Frustules from dead cells can sink to the ocean floor and therefore contribute about 90% to the diatom frustules making up the Antarctic opal belt, a band of heavily silicified sediments below the Antarctic Circumpolar Current. Recent studies showed that two morphotypes of F. kerguelensis can be found in core samples originating from the Southern Ocean. The morphotypes can be distinguished by the morphometric descriptor rectangularity and the abundance of the morphotypes can be linked to the origin of the samples from glacial or interglacial periods. It is, however, so far unknown whether these morphotypes also occur in current diatom assemblages of the Southern Ocean; if yes, how their occurrence is influenced by environmental conditions; and whether they represent different species, or rather phenotypic plasticity within a single species. For answering these questions diatom valves in water and sediment samples from the Southern Ocean, preserved on microscopic slides were analysed morphologically using a semi automated morphometry workflow. Histograms of the rectangularity were then plotted which all showed a bimodal distribution proving the existence of the two morphotypes in recent samples. In the next step the biogeographic distribution pattern of the two morphotypes was assessed by plotting the rectangularity distribution at each sample station. Whereas one morphotype was dominant in the northernmost samples, its dominance decreased towards the south, and the other morphotype became dominant in the southernmost locations investigated. This pattern could also be linked to the Sea Surface Temperature with a regression. After the previous findings the question arose if the morphotypes could be cryptic species or if they occur due to phenotypic plasticity within a single species. To answer this a genetic assessment with diatom strains showing different rectangularity values, isolated from the Southern Ocean and kept in live cultures at the Alfred-Wegener-Institut was done. Their ribosomal internal transcribed spacer (ITS) regions were amplified using PCR and then analysed with Sanger sequencing. The results made it possible to identify three potential species based on their genetic differences. One semi-cryptic species was solely made up of morphotype B whereas morphotype A was divided in two genetic clusters representing two cryptic species. Mating experiments were carried out to uncover possible reproductive barriers between the cryptic species. The results showed, that strains being assigned the same cryptic species commonly sexually reproduce, whereas sexual reproduction between strains from different cryptic species was only observed in a few exceptions. In summary, the two investigated morphotypes of Fragilariopsis kerguelensis can be found in the Southern Ocean today, with one dominating at higher, the other at lower Sea Surface Temperatures. Comparison of ribosomal ITS sequences and mating experiments indicate that the two morphotypes seem to belong to three different species, one semi-cryptic species belonging to one and two cryptic species to the other morphotype.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Thesis , notRev
    Format: application/pdf
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