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PANGAEA - Publishing Network for Geoscientific & Environmental Data (847.310 recursos)

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Datasets with PANGAEA technical keyword @geomar

Mostrando recursos 1 - 20 de 7.620

  1. Survival data of three gammarid species in three different temperature treatments and two salinities

    Casties, Isabel; Clemmensen, L B; Briski, Elizabeta

  2. Bacterial Biomass Production, Extracellular Enzyme Rates, Bacterial Cell Abundances and Dissolved Organic Carbon in the Upwelling System off Peru in Austral Winter 2017

    Engel, Anja; Maßmig, Marie
    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...

  3. Chlorophyll-a and Fv/Fm values for micronutrient enrichment incubation experiment during SONNE cruise SO243

    Browning, Thomas

  4. Chlorophyll-a, Fv/Fm, and nutrient values for near surface waters during SONNE cruise SO243

    Browning, Thomas

  5. Microstructure measurements during METEOR cruise M136

    Thomsen, Soeren; Lüdke, Jan

  6. Chlorophyll-a, Fv/Fm, and nutrient values for near surface waters and incubation experiment during SONNE cruise SO243

    Browning, Thomas
    Iron (Fe), cobalt (Co), and vitamin B12 addition experiments were performed in the eastern Equatorial Pacific/Peruvian upwelling zone during the 2015 El Niño event. Near the Peruvian coastline, apparent photosystem II photochemical efficiencies (Fv/Fm) were unchanged by nutrient addition and chlorophyll-a tripled in untreated controls over two days, indicating nutrient replete conditions. Conversely, Fe amendment further away from the coastline in the high nitrate, low Fe zone significantly increased Fv/Fm and chlorophyll-a concentrations. Mean chlorophyll-a was further enhanced following supply of Fe+Co and Fe+B12 relative to Fe alone, but this was not statistically significant; further offshore, reported Co depletion relative...

  7. Swath sonar multibeam EM122 bathymetry during METEOR cruise M86/5 with links to raw data files

    Hensen, Christian

  8. Raw multibeam EM122 data: transits of SONNE cruise SO260/1 (South Atlantic)

    Kasten, Sabine; Wölfl, Anne-Cathrin

  9. KOSMOS 2014 mesocosm study: carbonate system

    Taucher, Jan; Bach, Lennart Thomas

  10. Statistics and a generalized additive mixed model (GAMM) for seawater temperatures in the Kiel Fjord at 1.5 m depth for the period 2000-2014

    Pansch, Christian; Scotti, Marco; Barboza, Francisco R; Al-Janabi, Balsam; Brakel, Janina; Briski, Elizabeta; Buchholz, Björn; Franz, Markus; Ito, Maysa; Paiva, Filipa; Saha, Mahasweta; Sawall, Yvonne; Weinberger, Florian; Wahl, Martin
    Seawater temperatures in the Kiel Fjord at 1.5 m depth. Daily means , daily min and daily max values for the period 2000-2014 are represented. A generalized additive mixed model (GAMM) was fitted to the time series, including its 95 % confidence interval. The 2009 temperature curve is presented as this was used as the reference temperature treatment in the presented experiment. Data source: GEOMAR, Ocean Circulation and Climate Dynamics - Marine Meteorology (www.geomar.de/en/service/weather).

  11. Infection patterns among Vibrio spp. from distinct phylogenetic clades and their derived temperate phages

    Wendling, Carolin Charlotte; Göhlich, Henry; Roth, Olivia
    With their ability to integrate into the bacterial chromosome and thus transfer for instance virulence or drug-resistance genes across bacterial species, temperate phages play a key role in bacterial evolution. Thus, it is paramount to understand who infects whom to be able to predict the movement of DNA across the prokaryotic world and ultimately to predict the emergence of novel (drug-resistant) pathogens. We empirically investigated infection patterns among Vibrio spp. from distinct phylogenetic clades and their derived temperate phages. We found that across distantly related clades, infections occur preferentially within modules of the same clade. However, when the genetic distance of...

  12. Raw multibeam EM122 data: transits of SONNE cruise SO261 (South Pacific)

    Wenzhöfer, Frank; Wölfl, Anne-Cathrin

  13. Indoor mesocosm experiment 2013 on effects of increased CO2 concentration on nutrient limited coastal summer plankton: Phytoplankton biomass

    Paul, Allanah; Sommer, Ulrich

  14. KOSMOS Finland 2012 mesocosm study: Phytoplankton biomass and pigment concentration, Nitrogen cycle parameters

    Paul, Allanah; Stuhr, Annegret; Boxhammer, Tim

  15. Size of Poeobius measured by underwater vision profiler (UVP) during several cruises in the tropical Atlantic

    Christiansen, Svenja; Kiko, Rainer

  16. Effect of warming and acidification on the palatability of Fucus vesiculosus in benthocosm experiments

    Guy-Haim, Tamar; Raddatz, Stefanie; Rilov, Gil; Wahl, Martin
    Palatability as consumption of F. vesiculosus pellets by Idotea baltica (squares consumed in %). Consumption is displayed in regard to the four treatments: warm (+°C (delta+5)), acidified (-pH (delta +700µatm pCO2)), warm and acidified (+°C -pH), and ambient during four seasons: spring, summer, autumn, winter (n=3). The data set comprised 4 experimental runs: spring experiment (4.4.-10.6.2013), summer experiment 1 (4.7.-17.9.2013), autumn experiment (11.10-16.12.2013), winter experiment (16.1. - 28.3.2014).

  17. Effect of warming and acidification on the defense of Fucus vesiculosus in benthocosm experiments

    Guy-Haim, Tamar; Raddatz, Stefanie; Rilov, Gil; Wahl, Martin
    Human-induced ocean warming and acidification have received increasing attention over the past decade and are considered to have substantial consequences for a broad range of marine species and their interactions. Understanding how these interactions shift in response to climate change is particularly important with regard to foundation species, such as the brown alga Fucus vesiculosus. This macroalga represents the dominant habitat former on coastal rocky substrata of the Baltic Sea, fulfilling functions essential for the entire benthic community. Its ability to withstand extensive fouling and herbivory regulates the associated community and ecosystem dynamics. This study tested the interactive effects of...

  18. Abundance of Poeobius measured by underwater vision profiler (UVP) during several cruises in the tropical Atlantic

    Christiansen, Svenja; Kiko, Rainer

  19. Raw multibeam EM122 data: transits of SONNE cruise SO254 (South Pacific)

    Simon, Meinhard; Wölfl, Anne-Cathrin

  20. Monitoring benthic foraminiferal dynamics at Bottsand coastal lagoon (western Baltic Sea).

    Schönfeld, Joachim
    Benthic foraminifera from Bottsand coastal lagoon, western Baltic Sea, have been studied since the mid-1960s. They were monitored annually in late autumn since 2003 at the terminal ditch of the lagoon. There were 12 different species recognised, of which three have not been recorded during earlier investigations. Dom- inant species showed strong interannual fluctuations and a steady increase in population densities over the last decade. Elphidium incertum, a stenohaline species of the Baltic deep water fauna, colonised the Bottsand lagoon in 2016, most likely during a period of salinities >19 units and water temperatures of 18 C on average in...

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