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  • 1
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    Institut für Meereskunde
    In:  Berichte aus dem Institut für Meereskunde an der Christian-Albrechts-Universität Kiel, 118 . Institut für Meereskunde, Kiel, Germany, 90 pp.
    Publication Date: 2015-10-06
    Type: Report , NonPeerReviewed
    Format: text
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  • 2
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    AGU (American Geophysical Union)
    In:  Paleoceanography, 4 (4). pp. 353-412.
    Publication Date: 2017-03-14
    Type: Article , PeerReviewed
    Format: text
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  • 3
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    PANGAEA
    In:  EPIC3WOCE, Bremerhaven, PANGAEA
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
    Format: application/pdf
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  • 4
    Publication Date: 2019-07-17
    Description: Data pertaining to environmental conditions, sympagic (sea ice) microalgal dynamics and particle flux were collected before the spring ice break-up 2001 in Pierre Lejay Bay, adjacent to the Dumont d'Urville Station, Petrel Island, East Antarctica. An array of two multiple sediment traps and a current meter was deployed for five weeks, from 8 November to 6 December 2001. The sea-ice chlorophyll a and particulate organic carbon (POC) averaged 0.6 mg l−1 (30 mg m−2) and 20 mg l−1 (1 g m−2) near the coast. The POC export flux that reached a maximum of 79 mg m−2 d−1 during the study period was high compared to the one for the Weddell Sea. The flux was homogeneous from the surface to 47 m depth and increased sharply 33 days before the effective ice break-up. A north-western progressive vector of currents (i.e., Lagrangian drift) in the sub-ice surface waters was demonstrated. Bottom ice, platelet ice and under-ice water at 5 m were characterized by differences in colonization and short-term succession of microalgae.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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  • 5
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    Mitteilungen aus dem Institut für Seefischerei
    In:  EPIC3Hamburg, Mitteilungen aus dem Institut für Seefischerei
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
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  • 6
    Publication Date: 2024-02-28
    Description: Data presented here were collected during the two cruises SO248 and SO254 with RV SONNE in the Pacific Ocean at 25 stations along a transect closely following 180° longitude E/W between 52.1°S southeast of New Zealand and 58.9°N in the Bering Sea. The first cruise SO248 was conducted from Auckland, New Zealand, to Dutch Harbor, USA (May 1st, 2016 - June 3rd, 2016) and the second (SO254) took place from January 26th, 2017 - February 27th, 2017 and started and ended in Auckland, New Zealand. The data comprises hydrographical, chemical, biogeochemical and biological parameters.
    Keywords: Acetone extraction, fluorescence determination; Amino acid, total dissolved free; Amino acid, total dissolved free uptake; Amino acid, total hydrolysable dissolved; Amino acids, dissolved combined; BacGeoPac; Bacteria; Bacteria, heterotrophic with relatively low DNA content; BD FACS ARIA3 Flow Cytometer, autofluorescence (AF); Bering Sea; biogeochemistry; Biogeographical province; Biogeographical province after Longhurst (2006); biogeography; Breakdown of fluorescent substrate analoga (Obayashi and Suzuki, 2005, Limnol Oceanogr; Balmonte et al ., 2018, Environ Microbiol); Calculated; Calculated; DCAA = THDAA - DFAA; after Lunau et al. (2006); Calculated from downwelling photosynthetically active radiation PAR Ed, integrated from 400 - 700 nm; Carbohydrates, dissolved, neutral free; Carbohydrates, dissolved, neutral free, uptake; Carbohydrates, total hydrolyzable; Carbon, organic, particulate; Carbon, organic, particulate/Nitrogen, organic, particulate ratio; CARD-FISH; Catalyzed reporter deposition fluorescence in situ hybridisation (CARD-FISH); Catalyzed reporter deposition fluorescence in situ hybridisation (CARD-FISH), % of the DAPI positive stained cells; Chlorophyll a; Combustion by FlashEA 1112 CHN-analyzer; Conductivity; CTD, Sea-Bird, SBE 911plus [SN: 09-1266]; CTD, SEA-BIRD SBE 911plus, SN 5828 / SN 4529; CTD/Rosette; CTD-RO; cyanobacteria; Cyanobacteria; Cyanobacteria, cell size, forward scatter; Cyanobacteria, cell size, side scatter; Cytophaga-Flavobacteria; Cytophaga-Flavobacteria, cells; DATE/TIME; Density, sigma-theta (0); Depth, relative; DEPTH, water; Depth of Secchi Disk; ELEVATION; Equatorial Pacific; Eukaryotes; Eukaryotes, cell size, forward scatter; Eukaryotes, cell size, relative; Eukaryotes, cell size, side scatter; Event label; Flagellates+algae; Flagellates+algae, cell size, forward scatter; Flagellates+algae, cell size, side scatter; Flow Cytometer, BD Biosciences, C6 [autofluorescence, calibration of the forward scatter (FSC)]; Flow Cytometer, BD Biosciences, C6 [autofluorescence (AF)]; Flow Cytometer, BD Biosciences, C6 [calibration of the forward scatter (FSC), only relative cell size due to calibration after Giebel et al. (2019)]; Flow Cytometer, BD Biosciences, C6 [SybrGreenI staining]; flow cytometry; Fluorescence, chlorophyll; Fluorescence determination; Fluorometer, WET Labs ECO AFL/FL; Forel-Ule index; Gammaproteobacteria; Gammaproteobacteria, cells; Generation time; heterotrophic prokaryotic production; High nucleic acid bacteria; High nucleic acid bacteria, cell size, forward scatter; High nucleic acid bacteria, cell size, relative; High nucleic acid bacteria, cell size, side scatter; High performance liquid chromatography (HPLC) using an Agilent 1200 HPLC device after an ortho-phthaldialdehyde precolumn derivatization (Lindroth and Mopper, 1979) with slight modifications as described by Lunau et al. (2006); High Performance Liquid Chromatography (HPLC) using anion-exchange columns by pulsed amperometric detection according to Mopper et al. (1992); HNA; HPLC after Lindroth and Mopper (1979) with slight modifications as described by Lunau et al. (2006); Hydrolysis rate, beta-Glucose; Hydrolysis rate, Leucine; Incorporation of 14C-leucine (Simon and Azam, 1989, http://www.int-res.com/articles/meps/51/m051p201.pdf; Simon et al. 2004, doi:10.4319/lo.2004.49.4.1035); Incorporation of 3H-acetate (Simon et al. 2007, doi:10.4319/lo.2007.52.1.0085); Incorporation of 3H-Amino acid mix (Simon et al. 2004, doi:10.4319/lo.2004.49.4.1035; 2007, doi:10.4319/lo.2007.52.1.0085); Incorporation of 3H-Glucose (Simon et al. 2004, doi:10.4319/lo.2004.49.4.1035; 2007, doi:10.4319/lo.2007.52.1.0085); LATITUDE; LNA; LONGITUDE; Low nucleic acid bacteria; Low nucleic acid bacteria, cell size, forward scatter; Low nucleic acid bacteria, cell size, relative; Low nucleic acid bacteria, cell size, side scatter; Microplankton; Microplankton, cell size, forward scatter; Microplankton, cell size, relative; Microplankton, cell size, side scatter; Mixed layer depth; Nanoplankton; Nanoplankton, cell size, forward scatter; Nanoplankton, cell size, relative; Nanoplankton, cell size, side scatter; Nitrate; Nitrite; Nitrogen, organic, particulate; Nitrogen oxide; North Pacific Ocean; Ökologie, Physiologie und Molekularbiologie der Roseobacter-Gruppe: Aufbruch zu einem systembiologischen Verständnis einer global wichtigen Gruppe mariner Bakterien; Oxygen; Oxygen optode, Aanderaa, type 4831F; Pacific Ocean; Phosphate; Picoplankton; Picoplankton, cell size, forward scatter; Picoplankton, cell size, relative; Picoplankton, cell size, side scatter; Polaribacter; Polaribacter, cells; Pori Bac NewZ; Pressure, water; Prochlorococcus; Prochlorococcus, cell size, forward scatter; Prochlorococcus, cell size, side scatter; Prokaryotes, cell size, forward scatter; Prokaryotes, cell size, relative; Prokaryotes, growth rate; Prokaryotes, heterotroph; Prokaryotes, heterotroph, biomass production in mass protein; Prokaryotes, heterotroph, carbon production; Prokaryotes, heterotroph, cell size, side scatter; Prokaryotes, heterotroph, nitrogen production; Prokaryotes, heterotroph, protein production; Roseobacter; Roseobacter, cells; Roseobacter clade affiliated cluster, Planktomarina temperata; Roseobacter clade affiliated cluster, Planktomarina temperata, cells; RV Sonne; Salinity; SAR11; SAR11, cells; Silicate; SO248; SO248_10-2a; SO248_1-1; SO248_11-1; SO248_12-1; SO248_13-3; SO248_14-3; SO248_15-1; SO248_16-2; SO248_17-4; SO248_18-3; SO248_19-1; SO248_2-1; SO248_3-1; SO248_4-3; SO248_5-1; SO248_6-2; SO248_7-1; SO248_8-4; SO248_9-6; SO254; SO254_11-1; SO254_32-1; SO254_38-1; SO254_47-1; SO254_61-1; SO254_65-1; Sonne_2; Sound velocity in water; South Pacific Ocean; Station label; Synechococcus; Synechococcus, cell size, forward scatter; Synechococcus, cell size, side scatter; Temperature, water; Temperature, water, potential; TRR51; Turbidity (Nephelometric turbidity unit); Turnover rate, acetate; Turnover rate, amino acids, dissolved, free; Turnover rate, glucose
    Type: Dataset
    Format: text/tab-separated-values, 19990 data points
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  • 7
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    Universität Bremen
    In:  [Poster] In: Biogeochemical Cycles: German contribution to International JGOFS, 18.-21.09.2000, Bremen, Germany . Berichte aus dem Fachbereich Geowissenschaften der Universität Bremen ; pp. 32-33 .
    Publication Date: 2019-09-11
    Description: We observed variations in primary nutrients and phytoplankton biomass in an upwelling event off Oman during the strong SW-monsoon 1997. A so called filament, originating in the coastal upwelling, was tracked, marked with a drifter and followed for 19 days while intensive water sampling took place. The first stations in this upwelling event showed a severe silicate limitation. With the silicate limitation a diverse diatom community vanished. Although after a couple of days new silicate became available, another phytoplankton community of smaller organisms 〈 20 flm) with nearly no diatoms bloomed. These results raise fundamental questions about the interactions between silicate limitation and the control of carbon export in the worlds most productive areas. It is discussed, whether these limitation events might be typical short term features of coastal upwelling ecosystems, not described as yet.
    Type: Conference or Workshop Item , PeerReviewed
    Format: text
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  • 8
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    NSF
    In:  EPIC3Washington, D.C., NSF
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
    Format: application/pdf
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  • 9
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    In:  (PhD/ Doctoral thesis), Technical University of Denmark, Charlottenlund, Denmark, 130 pp
    Publication Date: 2018-11-23
    Description: Comb jellies were a relatively obscure group of zooplankton, until Mnemiopsis leidyi invaded the Black Sea in the 1980’s with cascading effects on several ecosystem levels including commercial fisheries. This native to the east coasts of America triggered large public and scientific attention as a result of this invasion and its ecological and economic impacts. In 2005, when M. leidyi was sighted in Northern Europe for the first time, similar consequences were feared. The aim of my PhD project was to understand the potential impact of M. leidyi on the Baltic Sea ecosystem and constrains on its dispersal. Specifically, the project investigated (i) direct and indirect effects of M. leidyi on the Baltic cod population in its most important spawning ground, (ii) factors governing the spatial and temporal distribution of M. leidyi eggs, larvae and adults in the Baltic and, (iii) M. leidyi reproduction and its effect on population development. The approach involved 13 monthly monitoring cruises from high saline Skagerrak to low saline northern Baltic regions, in situ and laboratory controlled reproduction and feeding experiments, molecular analysis for species verification, and statistical modeling. The low feeding rates and passive negative selection of cod eggs in experiments demonstrate that M. leidyi does not pose a direct threat to the Baltic cod population at the environmental conditions characteristic for its spawning ground. Furthermore, the drastically reduced reproduction rates observed under low salinities suggest M. leidyi is not likely to compete with cod recruits prey. Spatial and temporal surveys show highest abundances during October, with a consistent absence of adult and larval M. leidyi in the northern Baltic. Abundances in the Kattegat were 60 times higher than in the central Baltic, suggesting that the M. leidyi population in the central Baltic is dependent on advection from high saline areas. This interpretation is consistent with the low reproduction rates measured and a low fraction of up-growing animals in the central Baltic. While adults were not observed from April to June in high saline areas, M. leidyi larvae were present throughout the year. It remains unclear where M. leidyi overwinters but high saline areas appear to be important in the annual establishment of the population. Laboratory and in situ reproduction experiments confirmed that fecundity is a major contributor to M. leidyi’s invasion success, although salinity is regulating, and possibly restricting, its range expansion in Northern Europe. Maximum reproduction rates are shown to be attained at low food concentrations, helping reconcile the high population densities observed in localized areas despite low food concentrations. An unexpected discovery was that the arctic relict ctenophore Mertensia ovum, thought to be restricted to the northern Baltic, also occurs in the high saline Kattegat/Skagerrak during winter and spring. Interestingly, in the northern Baltic the M. ovum population consists exclusively of larval-sized animals that are actively reproducing and maintaining a self-sustained population. Natural selection can favor early maturation at small size when mortality rates are high, and our results are consistent with this hypothesis. Currently, M. leidyi has established itself permanently in high and intermediate saline areas in Northern Europe. While the ecological impact of M. leidyi in the central Baltic appears to be limited concern, the environment in other European waters should be more favourable to their populations. In these areas, it is suggested that M. leidyi constitutes a potential threat to fisheries through resource competition with fishes
    Type: Thesis , NonPeerReviewed
    Format: text
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  • 10
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    PANGAEA
    In:  EPIC3WOCE., Bremerhaven, PANGAEA
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: PANGAEA Documentation , notRev
    Format: application/pdf
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