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  • PANGAEA  (142)
  • Berlin : Heinrich-Böll-Stiftung  (3)
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  • 1
    Keywords: Atlas ; Meereskunde
    Type of Medium: Online Resource
    Pages: Online-Resource (50 Seiten, 23 MB)
    Language: English
    Note: Zur Erstellung des „Meeresatlas“ haben viele Expertinnen und Experten mit ihrem Fachwissen beigetragen. Beteiligt waren insbesondere Wissenschaftlerinnen und Wissenschaftler der Christian-Albrechts-Universität zu Kiel (CAU), die gemeinsam im Kieler Exzellenzcluster „Ozean der Zukunft“ zu Fragestellungen der Entwicklung unserer Meere forschen. Die Texte des Atlas beruhen auf Interviews, die mit den Expertinnen und Experten geführt wurden. Interviewführung: Natascha Pösel, Peter Wiebe, Ulrich Bähr
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  • 2
    Keywords: Atlas ; Meer ; Überfischung ; Meeresverschmutzung ; Meeresökosystem ; Naturschutz
    Description / Table of Contents: The publishers – the Heinrich Böll Stiftung Schleswig-Holstein, the Heinrich Böll Stiftung (national foundation), the University of Kiel Future Ocean Cluster of Excellence and the monthly magazine “Le Monde diplomatique” – want to point out the most important dimensions of our interaction with the ocean and its coasts. According to them, it is imperative to rethink our relationship with the ocean and its resources that are important parts of our environment and that urgently need international protection. On 23 graphically illustrated double pages the Atlas provides compact knowledge and current data on the ocean.
    Type of Medium: Book
    Pages: 50 Seiten
    Parallel Title: Übersetzung von Meeresatlas
    Parallel Title: Pösel, Natascha Parallele Sprachausgabe Atlas de los océanos
    Language: English
    Note: The publishers – the Heinrich Böll Stiftung Schleswig-Holstein, the Heinrich Böll Stiftung (national foundation), the University of Kiel Future Ocean Cluster of Excellence and the monthly magazine “Le Monde diplomatique” – want to point out the most important dimensions of our interaction with the ocean and its coasts. According to them, it is imperative to rethink our relationship with the ocean and its resources that are important parts of our environment and that urgently need international protection. On 23 graphically illustrated double pages the Atlas provides compact knowledge and current data on the ocean
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  • 3
    Keywords: Atlas ; Meereskunde
    Description / Table of Contents: Ohne das Meer gäbe es kein Leben auf unserem Planeten. Es regelt weitgehend das Klima, gibt uns Nahrung und liefert Energie. Darüber hinaus ist es ein wichtiger Verkehrsweg, ein Erholungsraum und ein Quell ästhetischen Vergnügens. Aber das Meer steht unter Stress, denn das alte Prinzip von der „Freiheit der Meere“ hat zu Überfischung, Artenverlust und einer immensen Verschmutzung der Ozeane geführt.Deshalb muss der Umgang mit dem Meer auf nachhaltige und gerechte Grundlagen gestellt werden. Der Meeresatlas 2017 liefert dazu die Daten, Fakten und Zusammenhänge. Er zeigt in zahlreichen Beiträgen und über 50 Grafiken, in welch schlechtem Zustand sich die Weltmeere befinden, warum das so ist und was man tun muss, um die Situation der Ozeane zu verbessern.
    Type of Medium: Map
    Pages: 1 Atlas (50 Seiten) , Illustrationen, Karten
    Parallel Title: Pösel, Natascha Übersetzt als Atlas de los océanos
    Language: German
    Note: Zur Erstellung des „Meeresatlas“ haben viele Expertinnen und Experten mit ihrem Fachwissen beigetragen. Beteiligt waren insbesondere Wissenschaftlerinnen und Wissenschaftler der Christian-Albrechts-Universität zu Kiel (CAU), die gemeinsam im Kieler Exzellenzcluster „Ozean der Zukunft“ zu Fragestellungen der Entwicklung unserer Meere forschen. Die Texte des Atlas beruhen auf Interviews, die mit den Expertinnen und Experten geführt wurden. Interviewführung: Natascha Pösel, Peter Wiebe, Ulrich Bähr , Hier auch später erschienene, unveränderte Nachdrucke
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  • 4
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    PANGAEA
    In:  Supplement to: Endres, Sonja; Galgani, Luisa; Riebesell, Ulf; Schulz, Kai Georg; Engel, Anja (2014): Stimulated Bacterial Growth under Elevated pCO2: Results from an Off-Shore Mesocosm Study. PLoS ONE, 9(6), e99228, https://doi.org/10.1371/journal.pone.0099228
    Publication Date: 2023-03-14
    Description: Marine bacteria are the main consumers of freshly produced organic matter. Many enzymatic processes involved in the bacterial digestion of organic compounds were shown to be pH sensitive in previous studies. Due to the continuous rise in atmospheric CO2 concentration, seawater pH is presently decreasing at a rate unprecedented during the last 300 million years but the consequences for microbial physiology, organic matter cycling and marine biogeochemistry are still unresolved. We studied the effects of elevated seawater pCO2 on a natural plankton community during a large-scale mesocosm study in a Norwegian fjord. Nine Kiel Off-Shore Mesocosms for Future Ocean Simulations (KOSMOS) were adjusted to different pCO2 levels ranging initially from ca. 280 to 3000 µatm and sampled every second day for 34 days. The first phytoplankton bloom developed around day 5. On day 14, inorganic nutrients were added to the enclosed, nutrient-poor waters to stimulate a second phytoplankton bloom, which occurred around day 20. Our results indicate that marine bacteria benefit directly and indirectly from decreasing seawater pH. During the first phytoplankton bloom, 5-10% more transparent exopolymer particles were formed in the high pCO2 mesocosms. Simultaneously, the efficiency of the protein-degrading enzyme leucine aminopeptidase increased with decreasing pH resulting in up to three times higher values in the highest pCO2/lowest pH mesocosm compared to the controls. In general, total and cell-specific aminopeptidase activities were elevated under low pH conditions. The combination of enhanced enzymatic hydrolysis of organic matter and increased availability of gel particles as substrate supported up to 28% higher bacterial abundance in the high pCO2 treatments. We conclude that ocean acidification has the potential to stimulate the bacterial community and facilitate the microbial recycling of freshly produced organic matter, thus strengthening the role of the microbial loop in the surface ocean.
    Keywords: Abundance per volume; BIOACID; Biological Impacts of Ocean Acidification; Chlorophyll a; DATE/TIME; Day of experiment; KOSMOS_2011_Bergen; Leucine aminopeptidase activity; MESO; Mesocosm experiment; pH; Raunefjord; Sample code/label; Transparent exopolymer particles as Gum Xanthan equivalents per volume; Transparent exopolymer particles as Gum Xanthan equivalents per volume, std dev
    Type: Dataset
    Format: text/tab-separated-values, 2053 data points
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  • 5
    Publication Date: 2023-03-08
    Keywords: Boknis_Eck; Chlorophyll a; DATE/TIME; DEPTH, water; GIK-cruise; Hausgarten; Kieler Bucht; MON; Monitoring; Salinity; Temperature, water; Wind speed
    Type: Dataset
    Format: text/tab-separated-values, 157 data points
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  • 6
    Publication Date: 2023-03-08
    Keywords: Abundance per volume; Amino acid, total hydrolysable; Boknis_Eck; Carbohydrates, total combined; Coomassie stainable particles; DATE/TIME; GIK-cruise; Hausgarten; Kieler Bucht; MON; Monitoring; Ratio; Sample code/label; Transparent exopolymer particles; Transparent exopolymer particles as Gum Xanthan equivalents per volume
    Type: Dataset
    Format: text/tab-separated-values, 429 data points
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  • 7
    Publication Date: 2023-03-14
    Keywords: Alkalinity, total; Alkalinity, total, standard deviation; BIOACID; Biological Impacts of Ocean Acidification; Calculated using CO2SYS; Carbon, total; Carbon, total, standard deviation; Carbon dioxide, partial pressure; Carbon dioxide, partial pressure, standard deviation; Colorimetry; DATE/TIME; Incubation duration; pH; pH, standard deviation; pH meter KNICK Model 761
    Type: Dataset
    Format: text/tab-separated-values, 120 data points
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  • 8
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    PANGAEA
    In:  Supplement to: Wannicke, Nicola; Endres, Sonja; Engel, Anja; Grossart, Hans-Peter; Unger, Juliane; Voss, Maren (2012): Response of Nodularia spumigena to pCO2 - Part 1: Growth, production and nitrogen cycling. Biogeosciences, 9(8), 2973-2988, https://doi.org/10.5194/bg-9-2973-2012
    Publication Date: 2023-05-12
    Description: Heterocystous cyanobacteria of the genus Nodularia form extensive blooms in the Baltic Sea and contribute substantially to the total annual primary production. Moreover, they dispense a large fraction of new nitrogen to the ecosystem when inorganic nitrogen concentration in summer is low. Thus, it is of ecological importance to know how Nodularia will react to future environmental changes, in particular to increasing carbon dioxide (CO2) concentrations and what consequences there might arise for cycling of organic matter in the Baltic Sea. Here, we determined carbon (C) and dinitrogen (N2) fixation rates, growth, elemental stoichiometry of particulate organic matter and nitrogen turnover in batch cultures of the heterocystous cyanobacterium Nodularia spumigena under low (median 315 µatm), mid (median 353 µatm), and high (median 548 µatm) CO2 concentrations. Our results demonstrate an overall stimulating effect of rising pCO2 on C and N2 fixation, as well as on cell growth. An increase in pCO2 during incubation days 0 to 9 resulted in an elevation in growth rate by 84 ± 38% (low vs. high pCO2) and 40 ± 25% (mid vs. high pCO2), as well as in N2 fixation by 93 ± 35% and 38 ± 1%, respectively. C uptake rates showed high standard deviations within treatments and in between sampling days. Nevertheless, C fixation in the high pCO2 treatment was elevated compared to the other two treatments by 97% (high vs. low) and 44% (high vs. mid) at day 0 and day 3, but this effect diminished afterwards. Additionally, elevation in carbon to nitrogen and nitrogen to phosphorus ratios of the particulate biomass formed (POC : POP and PON : POP) was observed at high pCO2. Our findings suggest that rising pCO2 stimulates the growth of heterocystous diazotrophic cyanobacteria, in a similar way as reported for the non-heterocystous diazotroph Trichodesmium. Implications for biogeochemical cycling and food web dynamics, as well as ecological and socio-economical aspects in the Baltic Sea are discussed.
    Keywords: BIOACID; Biological Impacts of Ocean Acidification
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 9
    Publication Date: 2023-01-13
    Keywords: Absorbance; Wavelength
    Type: Dataset
    Format: text/tab-separated-values, 6061 data points
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  • 10
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    PANGAEA
    In:  Supplement to: Galgani, Luisa; Engel, Anja; Rossi, Claudio; Donati, Alessandro; Loiselle, Steven Arthur (2018): Polystyrene microplastics increase microbial release of marine Chromophoric Dissolved Organic Matter in microcosm experiments. Scientific Reports, 8(1), https://doi.org/10.1038/s41598-018-32805-4
    Publication Date: 2023-01-13
    Description: Chromophoric dissolved organic matter (CDOM) is the photo-reactive fraction of the marine dissolved organic matter (DOM) pool. Changes in CDOM quality and quantity have impacts on marine microbial dynamics and the underwater light environment. One major source of CDOM is produced by marine bacteria through their alteration of pre-existing DOM substrates. In a series of microcosm experiments in controlled marine conditions, we explored the impact of polystyrene microplastics on the quality and quantity of microbial CDOM, observing an increased production of CDOM with changes in its molecular weight, which resulted from either an increased microbial CDOM production or an enhanced transformation of DOM from lower to higher molecular weight CDOM. This open dataset reports CDOM, bacteria, DOC and oxygen data collected in the series of microcosm experiments recently published. They refer to Experimental Set-up 1 and Experimental Set-up 2 (ES1, ES2). The CDOM data from the blank control experiment are also reported.
    Type: Dataset
    Format: application/zip, 3 datasets
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