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  • 1
    Electronic Resource
    Electronic Resource
    Primary production, nutrient dynamics and mineralisation in a northeastern Greenland fjord during the summer thaw (1996)
    Springer
    Polar biology 16 (1996), S. 497-506 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract This investigation represents the first integrated study of primary production, nutrient dynamics and mineralisation in a northeastern fjord of Greenland. The data presented represent conditions and activities during the early summer thaw (first 2 weeks of July). Primary production (5.3 mmol C m−2 d−2) and chlorophylla (4.1 μg 1−1) values were found to be comparable with measurements from other Arctic regions. Water column N-fixation rates were low (〈0.02 μmol N m−1 d−1), but comparable with other estuarine systems. Despite a constant low temperature in the bottom waters (-1.0 to -1.8°C), a high sedimentary O2 uptake (740 μmol m−2 h−2) was observed and was primarily caused by the presence of benthic infauna. Bioturbation by benthic infauna was reflected in both homogeneous210Pb and137Cs profiles in the upper 4 cm of the sediment. Permanent accumulation within Young Sound was measured to 0.12 cm/year corresponding to 153 mmol C m−2 year−1 and 15 mmol N m−2 year−1. Rates of nitrification (22 μmol m−2 h−1) and denitrification (9 μmol m−2 h−1) were comparable with rates reported for other sediments with much higher environmental temperatures. Suphate reduction rates integrated over the upper 12 cm of the sediment were calculated to be 44 μmol m−2h−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02329069
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  • 2
    Electronic Resource
    Electronic Resource
    Macrozoobenthic community structure in a high-arctic East Greenland fjord (2000)
    Springer
    Polar biology 23 (2000), S. 792-801 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A macrozoobenthic community study was conducted in an East Greenlandic fjord (Young Sound, 74°18′N; 20°15′W) during the ice-free period from July to August in 1996. Grab samples as well as underwater photography were used for quantifying the macrozoobenthos at water depths between 20 and 85 m. Abundance decreased with depth from 2700 ind. · m−2 at 20 m to 900 ind. · m−2 at 85 m. At a time series station at 35 m, abundance increased from 700 ind. · m−2 in mid-July to 1400 ind. · m−2 in mid-August. Polychaetes dominated in grab samples but bivalves constituted an important part of the benthic fauna, especially at the shallow part of the depth gradient. Photographs revealed high abundances of large epifaunal species, especially brittle stars. Diversity was generally high, with around 45 species per 201 individuals, as calculated by Hurlbert's rarefaction term. A gradual change in community structure with depth was observed, which could be related to variation in sediment composition and disturbance intensity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003000000154
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  • 3
    Electronic Resource
    Electronic Resource
    Primary production, nutrient dynamics and mineralisation in a northeastern Greenland fjord during the summer thaw (1996)
    Springer
    Polar biology 16 (1996), S. 497-506 
    Details
    ISSN: 1432-2056
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  This investigation represents the first integrated study of primary production, nutrient dynamics and mineralisation in a northeastern fjord of Greenland. The data presented represent conditions and activities during the early summer thaw (first 2 weeks of July). Primary production (5.3 mmol C m-2 d-1) and chlorophyll a (4.1μg l-1) values were found to be comparable with measurements from other Arctic regions. Water column N-fixation rates were low (〈0.02 μmol N m-1 d-1), but comparable with other estuarine systems. Despite a constant low temperature in the bottom waters (−1.0 to −1.8°C), a high sedimentary O2 uptake (740 μmol m-2 h-1) was observed and was primarily caused by the presence of benthic infauna. Bioturbation by benthic infauna was reflected in both homogeneous 210Pb and 137Cs profiles in the upper 4 cm of the sediment. Permanent accumulation within Young Sound was measured to 0.12 cm/year corresponding to 153 mmol C m-2 year-1 and 15 mmol N m-2 year-1. Rates of nitrification (22 μmol m-2 h-1) and denitrification (9 μmol m-2 h-1) were comparable with rates reported for other sediments with much higher environmental temperatures. Suphate reduction rates integrated over the upper 12 cm of the sediment were calculated to be 44 μmol m-2 h-1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003000050081
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Nitrification, denitrification, and nitrate ammonification in sediments of two coastal lagoons in Southern France (1996)
    Springer
    Hydrobiologia 329 (1996), S. 133-141 
    Details
    ISSN: 1573-5117
    Keywords: Nitrification ; denitrification ; nitrate ; ammonification ; sediments ; isotope ; 15N ; ammonium ; flux
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Seasonal and diurnal variations in sediment-water fluxes of O2, NO 3 − , and NH 4 + as well as rates of nitrification, denitrification, and nitrate ammonification were determined in two different coastal lagoons of southern France: The seagrass (Zostera noltii) dominated tidal Bassin d'Arcachon and the dystrophic Etang du Prévost. Overall, denitrification rates in both Bassin d'Arcachon (〈0.4 mmol m−2 d−1) and Etang du Prévost (〈1 mmol m−2 d−1) were low. This was mainly caused by a combination of low NO 3 − concentrations in the water column and a low nitrification activity within the sediment. In both Bassin d'Arcachon and Etang du Prévost, rates of nitrate ammonification were quantitatively as important as denitrification. Denitrification played a minor role as a nitrogen sink in both systems. In the tidal influenced Bassin d'Arcachon, Z. noltii was quantitatively more important than denitrification as a nitrogen sink due to the high assimilation rates of the plants. Throughout the year, Z. noltii stabilized the mudflats of the bay by its well- developed root matrix and controlled the nitrogen cycle due to its high uptake rates. In contrast, the lack of rooted macrophytes, and dominance of floating macroalgae, made nitrogen cycling in Etang du Prévost more unstable and unpredictable. Inhibition of nitrification and denitrification during the dystrophic crisis in the summer time increased the inorganic nitrogen flux from the sediment to the water column and thus increased the degree of benthic-pelagic coupling within this bay. During winter, however, benthic microalgae colonizing the sediment surface changed the sediment in the lagoon from being a nitrogen source to the over lying water to being a sink due to their high assimilation rates. It is likely, however, that this assimilated nitrogen is liberated to the water column at the onset of summer thereby fueling the extensive growth of the floating macroalgae, Ulva sp. The combination of a high nitrogen coupling between sediment and water column, little water exchange and low denitrification rates resulted in an unstable system with fast growing algal species such as phytoplankton and floating algae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00034553
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  • 5
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    (Table 2) Length, and carbon, nitrogen and lipid content of adult female Calanus finmarchicus, Calanus glacialis and Calanus hyperboreus specimens from Disko Bay (2011)
    PANGAEA
    Details
    Publication Date: 2024-01-24
    Keywords: Carbon/Nitrogen ratio; Carbon content per individual; DATE/TIME; Disko_Bay-Qeqe; Disko Bay, Greenland; High Performance Liquid Chromatography (HPLC); Length; Length, standard deviation; Lipids; Lipids, standard deviation; Lipids per individual; MULT; Multiple investigations; Nitrogen content per individual; Phospholipids; Phospholipids, standard deviation; Sample amount, subset; Sex; Species; Standard deviation; Triacylglycerols; Triacylglycerols, standard deviation; Wax esters; Wax esters, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 500 data points
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  • 6
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    Water stable water isotope, nutrient and alkalinity data from the Dana expedition NEG2017 in August-September 2017 on the Northeast Greenland shelf (2023)
    PANGAEA
    Details
    Publication Date: 2024-02-21
    Description: The NEG2017 cruise took place from 23 August 2017 to 11 September 2017 was part of the Strategic Environmental program for Northeast Greenland with as its goal to provide environmental impact information pertaining to potential oil exploitation and oil spill response activities in the region. The cruise leader for NEG2017 was Eva Friis Møller.
    Keywords: Alkalinity, total; CTD/Casts; CTD/Rosette; CTD-RO; Dana II; DEPTH, water; Event label; NEG2017; NEG2017/100; NEG2017/102; NEG2017/113; NEG2017/115; NEG2017/136; NEG2017/138; NEG2017/147; NEG2017/151; NEG2017/164; NEG2017/166; NEG2017/174; NEG2017/177; NEG2017/195; NEG2017/200; NEG2017/206; NEG2017/210; NEG2017/23; NEG2017/235; NEG2017/24; NEG2017/253; NEG2017/255; NEG2017/263; NEG2017/268; NEG2017/282; NEG2017/313; NEG2017/319; NEG2017/325; NEG2017/330; NEG2017/342; NEG2017/346; NEG2017/353; NEG2017/357; NEG2017/367; NEG2017/373; NEG2017/386; NEG2017/389; NEG2017/395; NEG2017/42; NEG2017/44; NEG2017/49; NEG2017/5; NEG2017/53; NEG2017/69; NEG2017/77; NEG2017/79; NEG2017/8; NEG2017/88; Nitrate; Northeast Greenland; Phosphate; Pressure, water; Silicon; δ18O, water; δ Deuterium, water
    Type: Dataset
    Format: text/tab-separated-values, 742 data points
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  • 7
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    Mooring-based (YS05) data collected in the period May-June 2014 in Young Sound, Greenland (2024)
    PANGAEA
    Details
    Publication Date: 2024-02-23
    Description: Time series of currents, salinity (conductivity), temperature Chlorophyl-a and CDOM were obtained in the period May- June 2014 by use of a McLane ice-tethered profiler in Young Sound, Greenland. At YS05 (74.238 N, 20.188 W) the mooring consisted of a 600 kHz downward-looking Nortek Aquadopp ADCP and an SBE 52-MP CTD (accuracy temperature ±0.002 C and conductivity ±0.0003 Sm-1) and WetLab ECO triplet (Cholorphyll-a and CDOM). Velocities were corrected for magnetic deviation (18.5o). The water column sampling spanned between 1.5 and 30 m depth every 30 min. The ADCP was set to sample 80 bins (bin size of 0.5 m) and each bin consisted of a 1 min ensemble average of 60 pings. The first and last bins were centred at 1m and 41 m depth. Only bins between 2.5 and 30 m were adequately measured. For further details see Boone et al., 2017 (Circulation and fjord-shelf exchange during the ice-covered period in Young Sound-Tyrolerfjord, Northwest Greenland (74 N). Estuar. Coast. Shelf Sci., 15, 194-205. https://doi.org/10.1016/j.ecss.2017.06.021).
    Keywords: Current velocity, east-west; Current velocity, north-south; DATE/TIME; DEPTH, water; Event label; Fluorescence, chlorophyll; Fluorescence, colored dissolved organic matter; Fluorometer, WET Labs ECO 3-Triplet; Hydrographic time series; ice-covered conditions; LATITUDE; LONGITUDE; MOOR; Moored Profiler CTD, Sea-Bird, SBE 52-MP; Mooring; Nortek Acoustic Wave and Current Profiler (AWAC); Pressure, water; Salinity; Temperature, water; Young Sound, Greenland; Young Sound-Greenland; YS05
    Type: Dataset
    Format: text/tab-separated-values, 284915 data points
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  • 8
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    CTD data collected in the period April-June 2014 in Young Sound, Greenland (2024)
    PANGAEA
    Details
    Publication Date: 2024-02-23
    Description: CTD data was obtained in the period April-June 2014 in Young Sound, Greenland. CTD casts were performed using an SBE-19 plus CTD (accuracy: ±0.005 C and ±0.0005 Sm-1) which was lowered through ice-drilled holes. In total, 4 transects were performed and covered from the mouth to the head of the fjord. Standardized routines of Seabird software were used on the data set for quality control and bin averaging. The data sets consist of profiles of practical salinity, temperature, potential temperature, dissolved oxygen, fluorescence, turbidity, and irradiance (PAR). For further details see Boone et al., 2017 (Circulation and fjord-shelf exchange during the ice-covered period in Young Sound-Tyrolerfjord, Northwest Greenland (74o N). Estuar. Coast. Shelf Sci., 15, 194-205. https://doi.org/10.1016/j.ecss.2017.06.021).
    Keywords: CTD, Sea-Bird, SBE 19plus; CTD data; DATE/TIME; DEPTH, water; Event label; Fluorescence; ice-covered conditions; LATITUDE; LONGITUDE; Oxygen, dissolved; Pressure, water; Radiation, photosynthetically active; Salinity; Sample elevation; Temperature, water; Temperature, water, potential; Turbidity (Formazin Turbidity Unit); Young Sound, Greenland; Young Sound-Greenland; YS-001; YS-002; YS-003; YS-004; YS-005; YS-006; YS-007; YS-008; YS-009; YS-010; YS-011; YS-012; YS-013; YS-014; YS-015; YS-016; YS-017; YS-018; YS-019; YS-020; YS-021; YS-022; YS-023; YS-024; YS-025; YS-026; YS-027; YS-028; YS-029; YS-030; YS-031; YS-032; YS-033; YS-034; YS-035; YS-036; YS-037; YS-038; YS-039; YS-040; YS-041; YS-042; YS-043; YS-044; YS-045; YS-046; YS-047; YS-048; YS-049; YS-050; YS-051; YS-052; YS-053; YS-054; YS-055; YS-056; YS-057; YS-058; YS-059; YS-060; YS-061; YS-062; YS-063; YS-064; YS-065; YS-066; YS-067; YS-068; YS-069; YS-070; YS-071; YS-072; YS-073; YS-074; YS-075; YS-076; YS-077; YS-078; YS-079; YS-080; YS-081; YS-082; YS-083; YS-084; YS-085; YS-086; YS-087; YS-088; YS-089; YS-090; YS-091; YS-092; YS-093; YS-094; YS-095; YS-096; YS-097; YS-098; YS-099; YS-100; YS-101; YS-102; YS-103; YS-104; YS-105; YS-106; YS-107; YS-108; YS-109; YS-110; YS-111; YS-112; YS-113; YS-114; YS-115; YS-116; YS-117; YS-118; YS-119; YS-120; YS-121; YS-122; YS-123; YS-124; YS-125; YS-126; YS-127; YS-128; YS-129; YS-130; YS-131; YS-132
    Type: Dataset
    Format: text/tab-separated-values, 191889 data points
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  • 9
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    Mooring-based (YS07) data collected in the period May-June 2014 in Young Sound, Greenland (2024)
    PANGAEA
    Details
    Publication Date: 2024-02-14
    Description: Time series of currents were obtained in the period May- June 2014 by use of an ice-tethered mooring in Young Sound, Greenland. At YS07 (74.233o N, 20.133o W) the mooring consisted of a 600 kHz downward-looking Nortek Aquadopp ADCP. Velocities were corrected for magnetic deviation (18.5o). The water column sampling spanned between 1.5 and 30 m depth every 30 min. The ADCP was set to sample 80 bins (bin size of 0.5 m) and each bin consisted of a 1 min ensamble average of 60 pings. The first and last bins were centred at 1m and 41 m depth. Only bins between 2.5 and 30 m were adequately measured. For further details see Boone et al., 2017 (Circulation and fjord-shelf exchange during the ice-covered period in Young Sound-Tyrolerfjord, Northwest Greenland (74o N). Estuar. Coast. Shelf Sci., 15, 194-205. https://doi.org/10.1016/j.ecss.2017.06.021).
    Keywords: Acoustic Doppler Current Profiling (ADCP), Nortek Aquadopp 600 khz; Current velocity, east-west; Current velocity, north-south; DATE/TIME; DEPTH, water; Event label; Hydrographic time series; ice-covered conditions; LATITUDE; LONGITUDE; Nortek Acoustic Wave and Current Profiler (AWAC); Pressure, water; Young Sound, Greenland; Young Sound-Greenland; YS07
    Type: Dataset
    Format: text/tab-separated-values, 2601120 data points
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  • 10
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    Characteristics of eggs and female adults of Calanus finmarchicus, C. glacialis and C. hyperboreus from Disko Bay, western Greenland (2011)
    PANGAEA
    In:  Supplement to: Swalethorp, Rasmus; Kjellerup, Sanne; Dünweber, Michael; Nielsen, Torkel Gissel; Møller, Eva Friis; Rysgaard, Søren; Hansen, Benni Winding (2011): Grazing, egg production, and biochemical evidence of differences in the life strategies of Calanus finmarchicus, C. glacialis and C. hyperboreus in Disko Bay, western Greenland. Marine Ecology Progress Series, 429, 125-144, https://doi.org/10.3354/meps09065
    Details
    Publication Date: 2024-01-24
    Description: This is the first high temporal-resolution study in Disko Bay covering population dynamics, grazing, reproduction, and biochemical composition of 3 dominating copepod species (Calanus finmarchicus, C. glacialis and C. hyperboreus) from late winter to midsummer in 2008. C. finmarchicus and C. glacialis ascended to the surface layer at the onset of the spring phytoplankton bloom, followed by C. hyperboreus 2 wk later. C. finmarchicus spawning occurred during the bloom and postbloom period, partially fueled by wax esters. C. glacialis commenced spawning before the bloom, yet it was greatly stimulated when food became available. However, feeding and reproduction was terminated after the main bloom despite the presence of food. In terms of feeding, this was also the strategy for C. hyperboreus. Between pre-bloom and post-bloom, C. finmarchicus showed an increase in carbon, nitrogen, and phospholipid content but a decrease in total lipid content. This was likely the result of protein synthesis, oocyte maturation, and spawning fueled by wax esters and by feeding. C. glacialis showed a similar pattern, although with an increasing total lipid content from pre-bloom to post-bloom, and an increasing wax ester and decreasing phospholipid content after reproduction was terminated. C. hyperboreus showed greatly increased content of carbon, nitrogen, and all lipid classes between the pre- and post-bloom periods. Hence, C. finmarchicus commenced feeding and spawning at the onset of the bloom and continued throughout the remaining study period. Both C. glacialis and C. hyperboreus females refueled their storage lipids (wax esters) during the bloom and post-bloom period, suggesting that they may spawn in an additional year.
    Keywords: Disko_Bay-Qeqe; Disko Bay, Greenland; International Polar Year (2007-2008); IPY; MULT; Multiple investigations
    Type: Dataset
    Format: application/zip, 2 datasets
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