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  • PANGAEA  (4)
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Keywords
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Years
  • 1
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    Dissolved Organic Matter in the Upwelling System off Peru from METEOR cruises M136 and M138 (2020)
    PANGAEA
    Details
    Publication Date: 2023-10-28
    Keywords: Alanine; Amino acids, dissolved; Amino acids, dissolved, Carbon; Amino acids, dissolved, Nitrogen; Amino acids, free; Amino acids, free, Carbon; Amino acids, free, Nitrogen; Arabinose; Arginine; Aspartic acid and Asparagine; Carbohydrates, dissolved combined; Carbohydrates, dissolved combined, Carbon; Carbohydrates, dissolved combined, Nitrogen; Carbon, organic, dissolved; Chlorophyll a; Climate - Biogeochemistry Interactions in the Tropical Ocean; CTD/Rosette; CTD 002; CTD 004; CTD 006; CTD 010; CTD 012; CTD 013; CTD 017; CTD 019; CTD 023; CTD 028; CTD 032; CTD 036; CTD 039; CTD 043; CTD 044; CTD 046; CTD 047; CTD 050; CTD 053; CTD 055; CTD 058; CTD 059; CTD 061; CTD 063; CTD 065; CTD 066; CTD 071; CTD 073; CTD 074; CTD 076; CTD 080; CTD 082; CTD 087; CTD 088; CTD 091; CTD 092; CTD 095; CTD 101; CTD-RO; Date/Time of event; Degradation; Degradation index; DEPTH, water; Event label; Fucose; Galactosamine; Galactose; Galacturonic acid; gamma-Aminobutyric acid; Gluconic acid; Glucosamine; Glucose; Glucuronic acid; Glutamine and Glutamic acid; Glycine; Isoleucine; LATITUDE; Leucine; LONGITUDE; M136; M136_339-1; M136_358-1; M136_368-1; M136_393-1; M136_402-1; M136_422-1; M136_432-1; M136_435-1; M136_445-1; M136_456-1; M136_467-1; M136_472-1; M136_480-1; M136_491-1; M136_508-1; M136_516-1; M136_532-1; M136_547-1; M136_559-1; M136_567-1; M138; M138_880-1; M138_880-4; M138_882-10; M138_883-12; M138_884-1; M138_886-3; M138_888-7; M138_892-3; M138_894-4; M138_897-12; M138_898-1; M138_902-1; M138_904-16; M138_906-18; M138_907-7; M138_908-3; M138_912-11; M138_915-3; M138_919-1; Mannose/Xylose; Meteor (1986); Muramic acid; Nitrogen, inorganic, dissolved; Nitrogen, total dissolved; Oxygen; Phenylalanine; Profile; Rhamnose; Salinity; Sample code/label; Score on PC1; Serine; SFB754; Station label; Temperature, water; Threonine; Turnover rate, carbon; Tyrosine; Valine
    Type: Dataset
    Format: text/tab-separated-values, 19069 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Bacterial Biomass Production, Extracellular Enzyme Rates, Bacterial Cell Abundances and Dissolved Organic Carbon in the Upwelling System off Peru in Austral Winter 2017 (2018)
    PANGAEA
    Details
    Publication Date: 2023-11-30
    Keywords: Amino acids, dissolved hydrolyzable; Bacteria, production as carbon; beta-Glucosidase Vmax; Carbohydrates, dissolved; Carbon, organic, dissolved; Cells; Chlorophyll a; Climate - Biogeochemistry Interactions in the Tropical Ocean; CTD/Rosette; CTD 002; CTD 010; CTD 013; CTD 043; CTD 047; CTD 050; CTD 055; CTD 059; CTD 063; CTD 065; CTD 066; CTD 071; CTD 073; CTD 074; CTD 080; CTD 082; CTD 088; CTD 091; CTD 095; CTD 101; CTD-RO; DATE/TIME; Degradation; DEPTH, water; Event label; LATITUDE; Leucine aminopeptidase Vmax; LONGITUDE; M136; M136_339-1; M136_358-1; M136_368-1; M136_422-1; M136_435-1; M136_445-1; M136_456-1; M136_467-1; M136_480-1; M136_491-1; M136_508-1; M136_516-1; M136_532-1; M136_559-1; M138; M138_904-16; M138_906-18; M138_908-3; M138_912-11; M138_915-3; M138_919-1; Meteor (1986); Nitrogen, total dissolved; Oxygen; Profile; Sample code/label; SFB754; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 3117 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Bacterial Biomass Production, Extracellular Enzyme Rates, Bacterial Cell Abundances and Dissolved Organic Carbon in the Upwelling System off Peru in Austral Winter 2017 (2018)
    PANGAEA
    In:  Supplement to: Maßmig, Marie; Lüdke, Jan; Krahmann, Gerd; Engel, Anja (2020): Bacterial degradation activity in the eastern tropical South Pacific oxygen minimum zone. Biogeosciences, 17(1), 215-230, https://doi.org/10.5194/bg-17-215-2020
    Details
    Publication Date: 2023-12-05
    Description: Oxygen minimum zones in the ocean increased during the past 50 years and changed microbial biogeochemical cycling; thereby research was focusing on changes in the nitrogen cycle. Earlier studies suggested higher efficiency of carbon export in those regions due to reduced microbial degradation activity. However, previous findings on the effect of oxygen on microbial activity are ambiguous. Here, we present first results on bacterial biomass production (estimated by 3H leucine incorporation) and extracellular enzyme rates (leucine aminopeptidase and ß-glucosidase), for the oxygen minimum zone off Peru, which is part of one of the largest anoxic zones in the ocean. We observed no reduction in bacterial biomass production, or extracellular enzyme rates and no reduced cell abundance in anoxic and suboxic waters, compared to more oxygenated waters at the oxyclines, suggesting that microbial degradation rate does not necessarily slow down under low oxygen conditions. We estimated a mean microbial carbon uptake of 548 µmol m-3 d-1, thereby only an average of 11 % got transformed into bacterial biomass. The remaining part was respired to carbon dioxide (average: 496 µmol m-3 d-1), that was potentially released to the atmosphere and accounted on average for 32 % of the oxygen reduction in the upper 80 m. Our study therewith proposes that microbial degradation of organic matter significantly contributes to the formation of the oxygen minimum zone off Peru and can proceed at relatively high rate within anoxic waters. This indicates that carbon dioxide production by heterotrophic microbial degradation in the OMZ off Peru, is not necessarily reduced under anoxia, and driven by anaerobic heterotrophic respiration pathways like denitrification.
    Keywords: Climate - Biogeochemistry Interactions in the Tropical Ocean; SFB754
    Type: Dataset
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    SFB754 Dissolved organic matter, cell abundance, extracellular enzyme rates, and bacterial production (2021)
    PANGAEA
    Details
    Publication Date: 2024-03-28
    Description: Dissolved Organic Matter, Cell Abundance and Extracellular Enzyme Rates and Bacterial Production from several cruises and experiments from 2008-2018
    Keywords: Climate - Biogeochemistry Interactions in the Tropical Ocean; SFB754
    Type: Dataset
    Format: 9 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
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