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  • Data  (61)
  • PANGAEA  (61)
  • Institut für Meereskunde
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  • PANGAEA  (61)
  • Institut für Meereskunde
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  • 1
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    Habitat characteristics and energy budget of the ocean quahog (Arctica islandica) (2010)
    PANGAEA
    In:  Supplement to: Begum, Salma; Basova, Larisa; Heilmayer, Olaf; Philipp, Eva E R; Abele, Doris; Brey, Thomas (2010): Growth and energy budget models of the bivalve Arctica islandica at six different sites in the Northeast Atlantic realm. Journal of Shellfish Research, 29(1), 107-115, https://doi.org/10.2983/035.029.0103
    Details
    Publication Date: 2024-07-19
    Description: We compared lifetime and population energy budgets of the extraordinary long-lived ocean quahog Arctica islandica from 6 different sites - the Norwegian coast, Kattegat, Kiel Bay, White Sea, German Bight, and off northeast Iceland - covering a temperature and salinity gradient of 4-10°C (annual mean) and 25-34, respectively. Based on von Bertalanffy growth models and size-mass relationships, we computed organic matter production of body (PSB) and of shell (PSS), whereas gonad production (PG) was estimated from the seasonal cycle in mass. Respiration (R) was computed by a model driven by body mass, temperature, and site. A. islandica populations differed distinctly in maximum life span (40 y in Kiel Bay to 197 y in Iceland), but less in growth performance (phi' ranged from 2.41 in the White Sea to 2.65 in Kattegat). Individual lifetime energy throughput, as approximated by assimilation, was highest in Iceland (43,730 kJ) and lowest in the White Sea (313 kJ). Net growth efficiency ranged between 0.251 and 0.348, whereas lifetime energy investment distinctly shifted from somatic to gonad production with increasing life span; PS/PG decreased from 0.362 (Kiel Bay, 40 y) to 0.031 (Iceland, 197 y). Population annual energy budgets were derived from individual budgets and estimates of population mortality rate (0.035/y in Iceland to 0.173/y in Kiel Bay). Relationships between budget ratios were similar on the population level, albeit with more emphasis on somatic production; PS/ PG ranged from 0.196 (Iceland) to 2.728 (White Sea), and P/B ranged from 0.203-0.285/y. Life span is the principal determinant of the relationship between budget parameters, whereas temperature affects net growth efficiency only. In the White Sea population, both growth performance and net growth efficiency of A. islandica were lowest. We presume that low temperature combined with low salinity represent a particularly stressful environment for this species.
    Keywords: International Polar Year (2007-2008); IPY
    Type: dataset publication series
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Fuzzy coding of biological traits of macrobenthic species in the North Sea (2013)
    PANGAEA
    Details
    Publication Date: 2024-07-19
    Description: Biological traits analysis is one of the most auspicious approaches to study the ecological functioning in marine ecosystems and provides a mechanistic link to ecosystem processes and properties. We used a Biological trait analysis to examine a dataset of 334 macrofaunal species that were collected at 4 long-term stations in the North Sea between 1969-2011. This data include seventeen biological traits related to life history (e.g. reproductive type) and behavior (e.g. feeding habit) of macrofuna species. In order to include all possible attributes of species, these traits were broken down into seventy-two categories. The affinities of the species to the categories were fuzzy coded with a scoring range of 0 to 3 (0= no affinity, 1= low affinity, 2=moderate affinity and 3=high association of taxon with the trait category). Missing values were supplemented by using information from the species in the nearest taxonomic level. If the affinity of a species to a category was not identified and there was no information available for the evaluation, a score of 0 was given for all the modalities associated with that species.
    Keywords: LTER_Benthos; Macrobenthic long-term series in the German Bight
    Type: dataset publication series
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Investigations on fossil bivalves and wood from Seymour Island, Antarctica (2011)
    PANGAEA
    In:  Supplement to: Ivany, Linda C; Brey, Thomas; Huber, Matthew; Buick, Devin P; Schöne, Bernd R (2011): El Niño in the Eocene greenhouse recorded by fossil bivalves and wood from Antarctica. Geophysical Research Letters, 38, L16709, https://doi.org/10.1029/2011GL048635
    Details
    Publication Date: 2024-07-19
    Description: Quasi-periodic variation in sea-surface temperature, precipitation, and sea-level pressure in the equatorial Pacific known as the El Niño - Southern Oscillation (ENSO) is an important mode of interannual variability in global climate. A collapse of the tropical Pacific onto a state resembling a so-called 'permanent El Niño', with a preferentially warmed eastern equatorial Pacific, flatter thermocline, and reduced interannual variability, in a warmer world is predicted by prevailing ENSO theory. If correct, future warming will be accompanied by a shift toward persistent conditions resembling El Niño years today, with major implications for global hydrological cycles and consequent impacts on socioeconomic and ecological systems. However, much uncertainty remains about how interannual variability will be affected. Here, we present multi-annual records of climate derived from growth increment widths in fossil bivalves and co-occurring driftwood from the Antarctic peninsula that demonstrate significant variability in the quasi-biennial and 3-6 year bands consistent with ENSO, despite early Eocene (~50 Mya) greenhouse conditions with global average temperature -10 degrees higher than today. A coupled climate model suggests an ENSO signal and teleconnections to this region during the Eocene, much like today. The presence of ENSO variation during this markedly warmer interval argues for the persistence of robust interannual variability in our future greenhouse world.
    Keywords: Antarctic Peninsula; HAND; LTER_Benthos; Macrobenthic long-term series in the German Bight; Sampling by hand; Seymour_Island
    Type: dataset publication series
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Investigation of escape response of Norwegian Pecten maximus (2013)
    PANGAEA
    In:  Supplement to: Schalkhausser, Burgel; Bock, Christian; Stemmer, Kristina; Brey, Thomas; Pörtner, Hans-Otto; Lannig, Gisela (2013): Impact of ocean acidification on escape performance of the king scallop, Pecten maximus, from Norway. Marine Biology, 160(8), 1995-2006, https://doi.org/10.1007/s00227-012-2057-8
    Details
    Publication Date: 2024-07-19
    Description: The ongoing process of ocean acidification already affects marine life and, according to the concept of oxygen- and capacity limitation of thermal tolerance (OCLTT), these effects may be exacerbated at the boarders of the thermal tolerance window. We studied the effects of elevated CO2 concentrations on clapping performance and energy metabolism of the commercially important scallop Pecten maximus. Individuals were exposed for at least 30 days to 4°C (winter) or to 10°C (spring/summer) at either ambient (0.04 kPa, normocapnia) or predicted future PCO2 levels (0.11 kPa, hypercapnia). Cold (4°C) exposed groups revealed thermal stress exacerbated by PCO2 indicated by a high mortality overall and its increase from 55% under normocapnia to 90% under hypercapnia. We therefore excluded the 4°C groups from further experimentation. Scallops at 10°C showed impaired clapping performance following hypercapnic exposure. Force production was significantly reduced although the number of claps was unchanged between normo- and hypercapnia exposed scallops. The difference between maximal and resting metabolic rate (aerobic scope) of the hypercapnic scallops was significantly reduced compared to normocapnic animals, indicating a reduction in net aerobic scope. Our data confirm that ocean acidification narrows the thermal tolerance range of scallops resulting in elevated vulnerability to temperature extremes and impairs the animal's performance capacity with potentially detrimental consequences for its fitness and survival in the ocean of tomorrow.
    Keywords: BIOACID; Biological Impacts of Ocean Acidification
    Type: dataset publication series
    Format: application/zip, 5 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    Lead/Calcium profiles in the common time window 1770-2010 of the three Arctica islandica shells (2012)
    PANGAEA
    In:  Supplement to: Krause-Nehring, Jacqueline; Brey, Thomas; Thorrold, Simon R (2012): Centennial records of lead contamination in northern Atlantic bivalves (Arctica islandica). Marine Pollution Bulletin, 64(2), 233-240, https://doi.org/10.1016/j.marpolbul.2011.11.028
    Details
    Publication Date: 2024-07-19
    Description: In the study, we establish centennial records of anthropogenic lead pollution at different locations in the North Atlantic (Iceland, USA, and Europe) by means of lead deposited in shells of the long-lived bivalve Arctica islandica. Due to local oceanographic and geological conditions we conclude that the lead concentrations in the Icelandic shell reflect natural influxes of lead into Icelandic waters. In comparison, the lead profile of the US shell is clearly driven by anthropogenic lead emissions transported from the continent to the ocean by westerly surface winds. Lead concentrations in the European North Sea shell, in contrast, are dominantly driven by local lead sources resulting in a much less conspicuous 1970s gasoline lead peak. In conclusion, the lead profiles of the three shells are driven by different influxes of lead, and yet, all support the applicability of Pb/Ca analyses of A. islandica shells to reconstruct location specific anthropogenic lead pollution.
    Keywords: Grab; GRAB; HELG; ICEL; Iceland; off Helgoland, North Sea; VIRG; Virginia, USA
    Type: dataset publication series
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    Macrobenthic abundance, biomass, productivity and production in the deep Arctic ocean (2014)
    PANGAEA
    In:  Supplement to: Degen, Renate; Vedenin, Andrey; Gusky, Manuela; Boetius, Antje; Brey, Thomas (2015): Patterns and trends of macrobenthic abundance, biomass and production in the deep Arctic Ocean. Polar Research, 34(1), 24008, https://doi.org/10.3402/polar.v34.24008
    Details
    Publication Date: 2024-07-19
    Description: The few existing studies on macrobenthic communities of the deep Arctic Ocean report low standing stocks, and confirm a gradient with declining biomass from the slopes down to the basins as commonly reported for deep-sea benthos. In this study we have further investigated the relationship of faunal abundance (N), biomass (B) as well as community production (P) with water depth, geographical latitude and sea ice concentration. The underlying dataset combines legacy data from the past 20 years, as well as recent field studies selected according to standardized quality control procedures. Community P/B and production were estimated using the multi-parameter ANN model developed by Brey (2012). We could confirm the previously described negative relationship of water depth and macrofauna standing stock in the Arctic deep-sea. Furthermore, the sea-ice cover increasing with high latitudes, correlated with decreasing abundances of down to 〈 200 individuals/m**2, biomasses of 〈 65 mg C/m**2 and P of 〈 75 mg C/m**2/y. Stations under influence of the seasonal ice zone (SIZ) showed much higher standing stock and P means between 400 - 1400 mg C/m**2/y; even at depths up to 3700 m. We conclude that particle flux is the key factor structuring benthic communities in the deep Arctic ocean, explaining both the low values in the ice-covered Arctic basins and the high values along the SIZ.
    Type: dataset publication series
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    Shell size, body mass and average pO2 in mantle cavity water of different marine mollusc species (2010)
    PANGAEA
    In:  Supplement to: Abele, Doris; Kruppe, Melanie; Philipp, Eva E R; Brey, Thomas (2010): Mantle cavity water oxygen partial pressure (Po-2) in marine molluscs aligns with lifestyle. Canadian Journal of Fisheries and Aquatic Sciences, 67(6), 977-986, https://doi.org/10.1139/F10-035
    Details
    Publication Date: 2024-07-19
    Description: Marine invertebrates with open circulatory system establish low and constant oxygen partial pressure (Po2) around their tissues. We hypothesized that as a first step towards maintenance of low haemolymph and tissue oxygenation, the Po2 in molluscan mantle cavity water should be lowered against normoxic (21 kPa) seawater Po2, but balanced high enough to meet the energetic requirements in a given species. We recorded Po2 in mantle cavity water of five molluscan species with different lifestyles, two pectinids (Aequipecten opercularis, Pecten maximus), two mud clams (Arctica islandica, Mya arenaria), and a limpet (Patella vulgata). All species maintain mantle cavity water oxygenation below normoxic Po2. Average mantle cavity water Po2 correlates positively with standard metabolic rate (SMR): highest in scallops and lowest in mud clams. Scallops show typical Po2 frequency distribution, with peaks between 3 and 10 kPa, whereas mud clams and limpets maintain mantle water Po2 mostly 〈5 kPa. Only A. islandica and P. vulgata display distinguishable temporal patterns in Po2 time series. Adjustment of mantle cavity Po2 to lower than ambient levels through controlled pumping prevents high oxygen gradients between bivalve tissues and surrounding fluid, limiting oxygen flux across the body surface. The patterns of Po2 in mantle cavity water correspond to molluscan ecotypes.
    Keywords: International Polar Year (2007-2008); IPY
    Type: dataset publication series
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    Stable isotopic ratios, shell lengths and organochlorine compounds in four bivalve species collected in July 2009 around Svalbard (2012)
    PANGAEA
    In:  Supplement to: Vieweg, Ireen; Hop, Haakon; Brey, Thomas; Huber, Sandra; Ambrose, William G Jr; Locke, William L; Gabrielsen, Geir W (2012): Persistent organic pollutants in four bivalve species from Svalbard waters. Environmental Pollution, 161, 134-142, https://doi.org/10.1016/j.envpol.2011.10.018
    Details
    Publication Date: 2024-07-19
    Description: Organochlorine compounds (OC) were determined in Arctic bivalves (Mya truncata, Serripes groenlan-dicus, Hiatella arctica and Chlamys islandica) from Svalbard with regard to differences in geographic location, species and variations related to their size and age. Higher chlorinated polychlorinated biphenyls (PCB 101-PCB 194), chlordanes and alpha-hexachlorocyclohexane (alpha-HCH) were consistently detected in the bivalves and PCBs dominated the OC load in the organisms. OC concentrations were highest in Mya truncata and the lowest in Serripes groenlandicus. Species-specific OC levels were likely related to differences in the species' food source, as indicated by the d13C results, rather than size and age. Higher OC concentrations were observed in bivalves from Kongsfjorden compared to the northern sampling locations Liefdefjorden and Sjuoyane. The spatial differences might be related to different water masses influencing Kongsfjorden (Atlantic) and the northern locations (Arctic), with differing phytoplankton bloom situations.
    Keywords: International Polar Year (2007-2008); IPY
    Type: dataset publication series
    Format: application/zip, 3 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    Uristes sp. length frequency data from the Molloy Deep (2001)
    PANGAEA
    In:  Supplement to: Klages, Michael; Vopel, Kay; Bluhm, Hartmut; Brey, M; Soltwedel, Thomas; Arntz, Wolf E (2001): Deep-sea food falls: first observation of a natural event in the Arctic Ocean. Polar Biology, 24(4), 292-295, https://doi.org/10.1007/s003000000199
    Details
    Publication Date: 2024-07-20
    Description: Concentrations of scavengers attracted by bait in the deep sea are documented by time-lapse photography and results of baited traps. During a remotely operated vehicle deployment in the Molloy Deep, the deepest depression of the Fram Strait, the carcass of a natant decapod, Pasiphaea tarda Krøyer, 1845, was discovered at 79°08.4'N and 002°49.85'E in a depth of 5,551 m. The carcass was covered by hundreds of individuals of Uristes sp., a scavenging lysianassoid amphipod. After documentation of this event, both the carcass and the majority of amphipods were collected. This is the first reported observation and sampling of an ongoing feeding process of scavengers on a natural food fall in the deep sea.
    Keywords: ARK-XV/1; AWI_BPP; Bentho-Pelagic Processes @ AWI; Image analysis; MUC; MultiCorer; Polarstern; PS55; PS55/003; Uristes sp., length
    Type: dataset
    Format: text/tab-separated-values, 693 data points
    Location Call Number Limitation Availability
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  • 10
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    Semi-quantitative records of benthic taxa from trawl samples taken in the wider Weddell Sea (Antarctica) during POLARSTERN cruises ANT VII/4, ANT IX/3, ANT XIII/3, ANT XV/3 and ANT XXI/2 between 1989 and 2004 (2020)
    PANGAEA
    Details
    Publication Date: 2024-07-19
    Description: The dataset comprises a total of 9,540 records of semi-quantitative data for 53 benthic invertebrate taxa and fish from 180 trawl samples (Agassiz trawl, bottom trawl, Rauschert dredge, benthopelagic trawl). The semi-quantitative data represent four categories regarding the frequency of occurrence of the benthic taxa (i.e. 0 = absent, 1 = rare, 2 = common and 3 = very common). The dataset was collected on the shelf and slope of the eastern Weddell Sea and Lazarev Sea, near Bouvet Island and the region at the north western tip of the Antarctic Peninsula (depth range: 64 - 2334 m) between 1989 and 2004 onboard "Polarstern". Cruises ANT VII/4 (1989), ANT IX/3 (1990/91), ANT XIII/3 (1996), ANT XV/3 (1998) and ANT XXI/2 (2003/2004) contributed to the data collection.
    Keywords: Acari; Actiniaria; Agassiz Trawl; AGT; Alcyonacea; Amphipoda; ANT-IX/3; ANT-VII/4; ANT-XIII/3; ANT-XV/3; ANT-XXI/2; Aplacophora; Ascidiacea; Asteroidea; Bentho-pelagic trawl; Bivalvia; Bottom trawl; BPT; Brachiopoda; Bryozoa; BT; Campaign; Cephalopoda; Cirripedia; Crinoidea; Cumacea; DATE/TIME; Date/time end; Decapoda; Demospongia; DEPTH, water; Drake Passage; Dredge, Rauschert; Drescher Inlet; Eastern Weddell Sea, Southern Ocean; Echinoidea; Echiurida; Errantia; Event label; Gear; Gorgonariana; Graptolithoidea; Halley Bay; Haul 8; Height; Hexacorallia; Hexactinellida; Holothuroidea; Hydroidolina; Hydrozoa; Isopoda; Kapp Norvegia; King George Island, Antarctic Peninsula; LATITUDE; Lazarev Sea; Leptostraca; LONGITUDE; Mesh size; MULT; Multiple investigations; Mysida; Nematoda; Nemertea; Nudibranchia; Ophiuroidea; Opisthobranchia; Ostracoda; Pantopoda; Pennatula; Pisces; Platyhelminthes; Polarstern; Polyplacophora; Porifera; Priapulida; Project; Prosobranchia; PS14/211; PS14/212; PS14/217; PS14/224; PS14/226; PS14/229; PS14/230; PS14/235; PS14/235-1; PS14/241; PS14/241-1; PS14/245; PS14/245-1; PS14/248; PS14/249; PS14/249-1; PS14/250; PS14/250-1; PS14/252; PS14/253; PS14/256; PS14/257; PS14/258; PS14/259; PS14/260; PS14/261; PS14/269; PS14/270; PS14/271; PS14/272; PS14/273; PS14/274; PS14/275; PS14/281; PS14/282; PS14/284; PS14/289; PS14/290; PS14/291; PS14/293; PS14 EPOS I; PS18; PS18/123-1; PS18/129-1; PS18/130-1; PS18/133-1; PS18/135-2; PS18/158-1; PS18/160-2; PS18/162-1; PS18/165-2; PS18/168-1; PS18/169-1; PS18/171-2; PS18/173-1; PS18/174-1; PS18/176-1; PS18/179-1; PS18/180-3; PS18/189-3; PS18/192-2; PS18/206-1; PS18/207-2; PS18/211-1; PS18/212-8; PS18/220-2; PS39/001-1; PS39/002-9; PS39/004-4; PS39/005-11; PS39/006-12; PS39/006-15; PS39/009-1; PS39/009-15; PS39/009-18; PS39/011-1; PS39/012-1; PS39/013-4; PS39/014-2; PS39/015-1; PS39/016-1; PS39/017-1; PS39/018-1; PS39/024-2; PS39/025-1; PS39/025-13; PS39/029-1; PS39/030-2; PS39 EASIZ; PS48/006; PS48/037; PS48/039; PS48/044; PS48/049; PS48/050; PS48/062; PS48/071; PS48/077; PS48/082; PS48/088; PS48/095; PS48/097; PS48/100; PS48/115; PS48/120; PS48/123; PS48/128; PS48/134; PS48/141; PS48/144; PS48/150; PS48/154; PS48/157; PS48/166; PS48/167; PS48/168; PS48/172; PS48/189; PS48/194; PS48/197; PS48/198; PS48/206; PS48/214; PS48/220; PS48/222; PS48/277; PS48/295; PS48/296; PS48/303; PS48/308; PS48/322; PS48/324; PS48/329; PS48/336; PS48/337; PS48/338; PS48/346; PS48/348; PS48/352; PS48/355; PS48 EASIZ II; PS65/019-1; PS65/020-1; PS65/028-1; PS65/029-1; PS65/039-1; PS65/090-1; PS65/109-1; PS65/121-1; PS65/132-1; PS65/161-1; PS65/173-1; PS65/233-1; PS65/245-1; PS65/248-1; PS65/253-1; PS65/259-1; PS65/265-1; PS65/274-1; PS65/276-1; PS65/278-1; PS65/279-1; PS65/280-1; PS65/292-1; PS65/336-1; PS65/344-1; PS65 BENDEX; Pycnogonida; RD; Sample ID; Scaphopoda; Scleractinia; Sedentaria; Ship speed; Siboglinidae; Sipuncula; South Atlantic Ocean; South of Vestkapp; Station label; Stolonifera; Stylasteridae; Tanaidacea; Trawling time; Turbellaria; Weddell Sea; Width
    Type: dataset
    Format: text/tab-separated-values, 11229 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
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