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  • 1
    Online Resource
    Online Resource
    BMBF-Forschungsverbund Schaffung von Grundlagen zur biogenen Alkalinitätsproduktion und Neutralisierung durch kontrollierte Eutrophierung und Saprobisierung von sauren Tagebaugewässern als Alternative und Ergänzung von Fremdflutungen - Kurztitel: Biogene Alkalinisierung, Teilprojekt 9: Bakterienproduktion: Höhe, Regulation und trophische Nutzung in versauerten Tagebauseen : Abschlussbericht an das BMBF ; Laufzeit des Auftrags: 01.05.2001 - 30.08.2004 (2004)
    Potsdam
    Details Availability
    Keywords: Forschungsbericht
    Type of Medium: Online Resource
    Pages: Online-Ressource (32 S., 341 KB) , Ill., graph. Darst
    URL: https://edocs.tib.eu/files/e01fb05/503091359.pdf
    URL: https://doi.org/10.2314/GBV:503091359
    URL: https://edocs.tib.eu/files/e01fb05/503091359l.pdf
    DOI: 10.2314/GBV:503091359
    Language: German
    Note: Förderkennzeichen BMBF 0339746A. - Literaturverz , Unterschiede zwischen dem gedruckten Dokument und der elektronischen Ressource können nicht ausgeschlossen werden , Auch als gedr. Ausg. vorhanden , Systemvoraussetzungen: Acrobat reader.
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  • 2
    Electronic Resource
    Electronic Resource
    Metabolism of dissolved organic carbon by planktonic bacteria and mixotrophic algae in lake neutralisation experiments (2004)
    Oxford, UK : Blackwell Science Ltd
    Freshwater biology 49 (2004), S. 0 
    Details
    ISSN: 1365-2427
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: 1. Lakes formed in mining pits often contain high concentrations of dissolved ferric iron and sulphate (e.g. 2 and 16 mmol L−1, respectively) and the pH is buffered between 2.5 and 3.5. Efforts to neutralise their water are based on the stimulation of lake internal, bacterial iron- and sulphate reduction. Electron donors may be supplied by organic carbon compounds or indirectly by enhancement of primary production. Here, we investigated the function of mixotrophic algae, which can potentially supplement or deplete the organic carbon pool, in the carbon metabolism and alkalinity budget of an acidic mining lake.2. Two weeks after organic substrates had been added in a large in situ mesocosm of 30 m diameter, a bloom of Chlamydomonas occurred, reaching a biovolume of 80 mm3 L−1. Growth experiments using filtered lake water showed that the alga reduced the overall dissolved organic carbon (DOC) concentration despite significant photosynthetic activity. However, when Chlamydomonas were grown together with natural bacterioplankton, net DOC consumption did not increase.3. Uptake experiments using [14C]-glucose indicated that bacteria dominated glucose uptake and remineralisation. Therefore, the DOC leached in the water column was processed mainly by planktonic bacteria. Leached DOC must be regarded as loss, not transferred by larger organisms to the sediment, where reduction processes take place.4. From phytoplankton biomass and production 2 years after fertilisation we estimated that pelagic photosynthesis does not supply an electron donor capacity capable of reducing more than 2% of actual stock of acidity per year. We estimated that only the benthic primary production was in a range to compensate for ongoing inputs of iron and sulphate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2427.2004.01241.x
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Coupling the microbial food web with fish: are bacteria attached to cyanobacteria an important food source for underyearling roach? (2001)
    Oxford UK : Blackwell Science Ltd
    Freshwater biology 46 (2001), S. 0 
    Details
    ISSN: 1365-2427
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: 1. After observing that juvenile roach fed intensively on cyanobacteria and that cyanobacteria were densely colonized by heterotrophic bacteria, we tested whether the bacteria are used by underyearling roach and the extent to which they contribute to the energy requirements of the fish.2. We radiolabelled attached bacteria in a natural cyanobacterial suspension, fed the fish with these particles, and estimated their assimilation by roach. Biomass of attached bacteria on cyanobacteria increased with the proportion of the cyanobacterium Microcystis in total cyanobacteria. Biomass-specific thymidine incorporation of attached bacteria was higher than that of free bacteria.3. In feeding experiments, we detected assimilation of bacterial biomass into muscle tissue of underyearling roach. Fish consumed Microcystis to a lesser extent compared with Aphanizomenon but assimilation of attached bacteria was higher when roach fed on Microcystis because of the higher biomass of epibacteria on this cyanobacterium. However, biomass of attached bacteria was too low to be an important food source for underyearling roach.4. We conclude that assimilation of epibacteria from cyanobacteria cannot explain the success of roach in eutrophic lakes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2427.2001.00701.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Consumption of cyanobacteria by roach (Rutilus rutilus): useful or harmful to the fish? (2002)
    Oxford UK : Blackwell Science Ltd
    Freshwater biology 47 (2002), S. 0 
    Details
    ISSN: 1365-2427
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: 1. The ability of roach to use cyanobacterial food is generally believed to be one reason for the dominance of roach over perch in eutrophic European lakes. The aim of this study was to test whether cyanobacteria really are a suitable food for juvenile roach. Special attention was paid to differences between the two cyanobacteria species Aphanizomenon and Microcystis which are common in eutrophic lakes and are ingested by roach there.2. We performed growth and behaviour experiments with juvenile roach fed with zooplankton and the different cyanobacteria. Growth rate with Aphanizomenon was lower than with Daphnia but significantly higher than without food, whereas growth rate with Microcystis was as low as without food.3. In cultivation experiments of roach faeces, Microcystis was found not to have been digested and grew exponentially after passing through the gut whereas Aphanizomenon stayed at low biomass. Differences in growth were not related to the toxin content of cyanobacteria. Investigations of roach motility showed no differences whether fed with Aphanizomenon or Microcystis.4. In contrast to Microcystis, Aphanizomenon can be regarded as a suitable food source for juvenile roach probably because of its better digestability. We conclude that the ability to feed on cyanobacteria is not a general competitive advantage for roach, but the outcome depends on the species composition of the cyanobacteria.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2427.2002.00800.x
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    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Bacteria ingestion by Daphnia galeata in a biomanipulated reservoir: a mechanism stabilizing biomanipulation? (1999)
    Springer
    Hydrobiologia 403 (1999), S. 109-121 
    Details
    ISSN: 1573-5117
    Keywords: bacteria ; phytoplankton ; daphnids ; clearance rate ; ingestion ; biomanipulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We determined clearance rates and ingestion rates of Daphnia galeata on bacteria and phytoplankton in order to test if bacteria are an important alternative food resource for daphnids during periods of low phytoplankton biomass in the biomanipulated Bautzen reservoir (Germany). D. galeata was able to feed on bacteria with the same efficiency as on algae during most of the time. In spite of similar clearance rates, bacteria ingestion was usually lower than phytoplankton ingestion due to lower bacterial biomass. Only at low biomass of algae in late fall and during the clear water phase, bacteria contributed up to 87% and 42%, respectively, to total carbon ingestion of D. galeata. However, even a short period of relatively high bacteria grazing by daphnids may be important for biomanipulation. Bacteria might bridge over periods of food limitation of daphnids thus promoting the maintenance of high Daphnia biomass. Therefore, ingestion of bacteria by daphnids is thought to stabilize biomanipulation and may hold a key position in the food web of biomanipulated lakes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003722318598
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    Paper (German National Licenses)
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  • 6
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    MOSES: A Novel Observation System to Monitor Dynamic Events across Earth Compartments (2022)
    AMS (American Meteorological Society)
    Details
    Publication Date: 2024-02-07
    Description: Modular Observation Solutions of Earth Systems (MOSES) is a novel observation system that is specifically designed to unravel the impact of distinct, dynamic events on the long-term development of environmental systems. Hydrometeorological extremes such as the recent European droughts or the floods of 2013 caused severe and lasting environmental damage. Modeling studies suggest that abrupt permafrost thaw events accelerate Arctic greenhouse gas emissions. Short-lived ocean eddies seem to comprise a significant share of the marine carbon uptake or release. Although there is increasing evidence that such dynamic events bear the potential for major environmental impacts, our knowledge on the processes they trigger is still very limited. MOSES aims at capturing such events, from their formation to their end, with high spatial and temporal resolution. As such, the observation system extends and complements existing national and international observation networks, which are mostly designed for long-term monitoring. Several German Helmholtz Association centers have developed this research facility as a mobile and modular “system of systems” to record energy, water, greenhouse gas, and nutrient cycles on the land surface, in coastal regions, in the ocean, in polar regions, and in the atmosphere—but especially the interactions between the Earth compartments. During the implementation period (2017–21), the measuring systems were put into operation and test campaigns were performed to establish event-driven campaign routines. With MOSES’s regular operation starting in 2022, the observation system will then be ready for cross-compartment and cross-discipline research on the environmental impacts of dynamic events.
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 7
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    Large-scale nutrient and carbon dynamics along the river-estuary-ocean continuum (2023)
    Elsevier
    Details
    Publication Date: 2024-02-07
    Description: Highlights • Nutrient and carbon fluxes are key processes in land-ocean interactions. • We sampled along the river-estuary-ocean system according to travel time of water. • The river was autotrophic with phytoplankton growth, high pH and oxygen concentration, and CO2 undersaturation. • Phytoplankton died off in the estuary causing low pH and oxygen concentration, CO2 supersaturation, and nutrient release. • The approach is suitable to investigate single events such as hydrological extremes. Nutrient and carbon dynamics within the river-estuary-coastal water systems are key processes in understanding the flux of matter from the terrestrial environment to the ocean. Here, we analysed those dynamics by following a sampling approach based on the travel time of water and an advanced calculation of nutrient fluxes in the tidal part. We started with a nearly Lagrangian sampling of the river (River Elbe, Germany; 580 km within 8 days). After a subsequent investigation of the estuary, we followed the plume of the river by raster sampling the German Bight (North Sea) using three ships simultaneously. In the river, we detected intensive longitudinal growth of phytoplankton connected with high oxygen saturation and pH values and an undersaturation of CO2, whereas concentrations of dissolved nutrients declined. In the estuary, the Elbe shifted from an autotrophic to a heterotrophic system: Phytoplankton died off upstream of the salinity gradient, causing minima in oxygen saturation and pH, supersaturation of CO2, and a release of nutrients. In the shelf region, phytoplankton and nutrient concentrations were low, oxygen was close to saturation, and pH was within a typical marine range. Over all sections, oxygen saturation was positively related to pH and negatively to pCO2. Corresponding to the significant particulated nutrient flux via phytoplankton, flux rates of dissolved nutrients from river into estuary were low and determined by depleted concentrations. In contrast, fluxes from the estuary to the coastal waters were higher and the pattern was determined by tidal current. Overall, the approach is appropriate to better understand land-ocean fluxes, particularly to illuminate the importance of these fluxes under different seasonal and hydrological conditions, including flood and drought events.
    Type: Article , PeerReviewed
    Format: text
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 8
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    Water chemistry of a Lagrangian sampling of Inland Elbe 2020 (MOSES Hydrological Extremes) (2022)
    PANGAEA
    Details
    Publication Date: 2023-04-22
    Description: The MOSES test campaign ELBE 2020 includes activities along the middle reaches to the tidal Elbe river and the German Bight. The inland Elbe river part of the campaign covers physico-chemical parameters from various sites along the Elbe River and its main tributaries. The sampling was conducted in a Langrangian way according to travel time, particularly between Aug 04 to Aug 12. Discharge in Magdeburg was 241 m³/s which is about mean low discharge (231 m³/s). Physico-chemical parameters as well as nutrients were sampled using the research vessel ALBIS from Schmilka (km 4, German border) to Geestacht (km 585, close to Hamburg). The targets were water quality measurement by multiparameter probes and chemical analyses, the detection of phytoplankton growth and decrease of dissolved nutrients along the river.
    Keywords: 2020ELBE_el00400l; 2020ELBE_el00400m; 2020ELBE_el00400r; 2020ELBE_el05450l; 2020ELBE_el05450m; 2020ELBE_el05450r; 2020ELBE_el08800l; 2020ELBE_el08800m; 2020ELBE_el08800r; 2020ELBE_el10700l; 2020ELBE_el10700m; 2020ELBE_el10700r; 2020ELBE_el15450l; 2020ELBE_el15450m; 2020ELBE_el15450r; 2020ELBE_el17260l-MST; 2020ELBE_el17260m; 2020ELBE_el17260r; 2020ELBE_el19900muend; 2020ELBE_el25800l; 2020ELBE_el25800m; 2020ELBE_el25800r; 2020ELBE_el25900muend; 2020ELBE_el28700l; 2020ELBE_el28700m; 2020ELBE_el28700r; 2020ELBE_el29070muend; 2020ELBE_el31800l; 2020ELBE_el31800m; 2020ELBE_el31800r; 2020ELBE_el32653l; 2020ELBE_el32653m; 2020ELBE_el32653r; 2020ELBE_el35100l; 2020ELBE_el35100m; 2020ELBE_el35100r; 2020ELBE_el38800l; 2020ELBE_el38800m; 2020ELBE_el38800r; 2020ELBE_el42225l; 2020ELBE_el42225m; 2020ELBE_el42225r; 2020ELBE_el43800muend; 2020ELBE_el45490l; 2020ELBE_el45490m; 2020ELBE_el45490r; 2020ELBE_el47500l; 2020ELBE_el47500m; 2020ELBE_el47500r; 2020ELBE_el50600l; 2020ELBE_el50600m; 2020ELBE_el50600r; 2020ELBE_el53600l; 2020ELBE_el53600m; 2020ELBE_el53600r; 2020ELBE_el57040l; 2020ELBE_el57040m; 2020ELBE_el57040r; 2020ELBE_el58550l; 2020ELBE_el58550m; 2020ELBE_el58550r; Ammonium-nitrogen; Area/locality; Breitenhagen links; Breitenhagen mitte; Breitenhagen rechts; Carbon, inorganic, dissolved; Carbon, inorganic, total; Carbon, organic, dissolved; Carbon, organic, particulate; Carbon analyzer; CFA; Chlorophyll a; Conductivity, electrical; Continuous Flow Analysis; Date/Time of event; DIMA-IC; Distance; Doemitz, li; Doemitz, re; Dommitzsch Mitte; Dommitzsch rechts; drought; Elbe; Elbe Dresden CarolaBruecke links; Elbe Dresden CarolaBruecke Mitte; Elbe Dresden CarolaBruecke rechts; Elbe km 388.0 Tangermuende links; Elbe km 388.0 Tangermuende rechts; Elbe km 506, Doemitz, mitte; Elbe MD links, km 318, MD Westerhuesen; Elbe Riesa Bruecke links; Elbe Riesa Bruecke Mitte; Elbe Riesa Bruecke rechts; Elbe Roެau mitte, km 258; Elbe Torgau Bruecke links; Elbe Torgau Bruecke Mitte; Elbe Torgau Bruecke rechts; Event label; Faehre Werben Elbe km 422,25 links; Faehre Werben Elbe km 422,25 Mitte; Faehre Werben Elbe km 422,25 rechts; Geestacht links; Geestacht rechts; Geesthacht; Havel Muendung; HPLCO; hydrological extremes; Lauenburg links; Lauenburg Mitte; Lauenburg rechts; Magdeburg mitte; Magdeburg Neue StromBruecke links; Magdeburg Neue StromBruecke Mitte; Magdeburg Neue StromBruecke rechts; Magdeburg rechts km 318; Messstation Dommitzsch, links Strom-km 172,6; Modular Observation Solutions for Earth Systems; MOSES; Mulde Muendung; MULT; Multiple investigations; Neu Darchau links; Neu Darchau mitte; Neu Darchau rechts; Nitrate-nitrogen; Nitrite-nitrogen; Nitrogen, organic, particulate; nutrients; Oxygen, dissolved; pH; Phosphorus, reactive soluble; Phosphorus, total; Photometry; Phytoplankton; Pigments analysis by HPLC (UV and FLD); River Elbe; Rogaetz links; Rogaetz mitte; Rogaetz rechts; Roެau links; Roެau rechts; AutoBruecke - Hochwasserprobenahme; Saale Muendung Elbekilometer 290,7; Schmilka links; Schmilka mitte; Schmilka rechts; Schnackenburg links; Schnackenburg mitte; Schnackenburg rechts; Schwarze Elster Muendung; Silicon; Tangermuende, Mitte km 388,0; Temperature, water; Turbidity (Nephelometric turbidity unit); Wittenberge, links; Wittenberge, mitte; Wittenberge, rechts; YSI 610 Handheld Multiparameter Instrument; Zehren links; Zehren mitte; Zehren rechts
    Type: Dataset
    Format: text/tab-separated-values, 1339 data points
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    DATA PANGAEA
  • 9
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    Hydrographic parameters, dissolved CH4, atmospheric CH4 and CO2 along the river Elbe, August 2020 (2022)
    PANGAEA
    Details
    Publication Date: 2023-12-14
    Description: In August 2020 the research vessel Albis investigated the river Elbe from Schmielka towards Geesthacht. Basic hydrographic parameters were measured continuously, with a portable ferryBox. Dissolved methane was continuously determined with a degassing unit and a Greenhouse Gas Analyzer from LosGatosResearch. Atmospheric CH4 and CO2 was determined with a Licor system.
    Keywords: atmospheric methane; Carbon dioxide; Carbon dioxide, dissolved; Chlorophyll total; Conductivity, electrical; Cruise/expedition; DATE/TIME; DEPTH, water; dissolved methane; Distance; FBOX; FerryBox; Flow rate; Greenhouse Gas Analyzer, LosGatos; LATITUDE; LONGITUDE; Methane; Methane, dissolved; Methane, flux; Modular Observation Solutions for Earth Systems; MOSES; Oxygen saturation; pH; River Elbe; Ship speed; Temperature, water; Trace gas analyzer, LI-COR, LI-7810; Turbidity (Nephelometric turbidity unit)
    Type: Dataset
    Format: text/tab-separated-values, 64313 data points
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  • 10
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    Water chemistry of Lagrangian samplings of Inland Elbe 2021 (MOSES Hydrological Extremes) (2023)
    PANGAEA
    In:  Helmholtz Centre for Environmental Research - UFZ
    Details
    Publication Date: 2024-02-28
    Description: Four sampling campaigns were performed in the middle part of River Elbe between Elster (river km 199) and Dömitz (km 506). Measurements were done at different seasons and discharge conditions in April, June, August, and October 2021. The sampling was conducted in a Lagrangian way according to travel time using the research vessel Albis. For each campaign, data files of the multiparameter probe and of waterchemical analyses are provided.
    Keywords: 2021_MOSES_Elbe-NorthSea; 2021_MOSES_Elbe-NorthSea_Inland; 2021ELBE_el19890l; 2021ELBE_el19890m; 2021ELBE_el19890r; 2021ELBE_el19900muend; 2021ELBE_el25800l; 2021ELBE_el25800m; 2021ELBE_el25800r; 2021ELBE_el25900muend; 2021ELBE_el28700l; 2021ELBE_el28700m; 2021ELBE_el28700r; 2021ELBE_el29070muend; 2021ELBE_el31800l; 2021ELBE_el31800m; 2021ELBE_el31800r; 2021ELBE_el32653l; 2021ELBE_el32653m; 2021ELBE_el32653r; 2021ELBE_el35100l; 2021ELBE_el35100m; 2021ELBE_el35100r; 2021ELBE_el38800l; 2021ELBE_el38800m; 2021ELBE_el38800r; 2021ELBE_el42225l; 2021ELBE_el42225m; 2021ELBE_el42225r; 2021ELBE_el43800muend; 2021ELBE_el45490l; 2021ELBE_el45490m; 2021ELBE_el45490r; 2021ELBE_el47500l; 2021ELBE_el47500m; 2021ELBE_el47500r; 2021ELBE_el50600l; 2021ELBE_el50600m; 2021ELBE_el50600r; Acid Base titration; Albis; Ammonium molybdate spectrometric method; Ammonium-nitrogen; Area/locality; Arsenic, dissolved; Arsenic, total; Base capacity 4.3; Base capacity 8.2; Breitenhagen links; Breitenhagen mitte; Breitenhagen rechts; Carbon, organic, dissolved; Carbon, organic, particulate; CFA; Chlorophyll a; Conductivity, electrical; Continuous Flow Analysis; Date/Time local; Distance; Doemitz links; Doemitz mitte; Doemitz rechts; Elbe; Elster links; Elster mitte; Elster rechts; Event label; Havel Muendung; HPLCO; ICP-OES according to DIN EN ISO 11885; Inductively coupled plasma mass spectrometer (ICP-MS) [according to DIN EN ISO 17294-2]; InfraRed sensor detection according to DIN EN 1484:1997 DE; Iron, dissolved; Iron, total; LATITUDE; Lead, dissolved; Lead, total; LONGITUDE; Magdeburg Neue Strombruecke links; Magdeburg Neue Strombruecke mitte; Magdeburg Neue Strombruecke rechts; Manganese, dissolved; Manganese, total; Mercury, total; Modular Observation Solutions for Earth Systems; MOSES; Mulde Muendung; MULT; Multiparameter probe, YSI Xylem Inc., EXO2; Multiple investigations; Nitrate-nitrogen; Nitrite-nitrogen; Nitrogen, organic, particulate; nutrients; Oxygen saturation; pH; Phosphorus, reactive soluble; Phosphorus, total; Phytoplankton; Pigments analysis by HPLC (UV and FLD); river; Rogaetz links; Rogaetz mitte; Rogaetz rechts; Roެau links; Roެau mitte; Roެau rechts; Saale Muendung; Schnackenburg links; Schnackenburg mitte; Schnackenburg rechts; Schwarze Elster Muendung; Segmented flow analysis according to DIN EN ISO 13395:1996-12; Silicon; Tangermuende links; Tangermuende mitte; Tangermuende rechts; Temperature, water; Turbidity (Nephelometric turbidity unit); Werben links; Werben mitte; Werben rechts; Westerhuesen links; Westerhuesen mitte; Westerhuesen rechts; Wittenberge links; Wittenberge mitte; Wittenberge rechts
    Type: Dataset
    Format: text/tab-separated-values, 4580 data points
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    DATA PANGAEA
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