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  • PANGAEA  (27)
  • 2015-2019  (27)
Document type
Keywords
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  • 1
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    Crabeater seals (Lobodon carcinophaga) in the Weddell Sea during DRE1998 campaign, with link to shapefiles of filtered and unfiltered seal locations for ArcGIS visualisation (2015)
    PANGAEA
    Details
    Publication Date: 2023-04-21
    Keywords: DrescherInlet; Marine Mammal Tracking; MMT
    Type: Dataset
    Format: application/zip, 277.8 kBytes
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
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    Crabeater seals (Lobodon carcinophaga) in the Weddell Sea during DRE1998 campaign, with link to files of gridded seal locations and environmental parameters for Maxent analyses (2015)
    PANGAEA
    Details
    Publication Date: 2023-04-21
    Keywords: DrescherInlet; Marine Mammal Tracking; MMT
    Type: Dataset
    Format: application/zip, 8.3 MBytes
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    At surface behaviour at location on spot, dive depth profile, and water temperature and salinity data of Weddell seals from Filchner Trough in 2014 (2017)
    PANGAEA
    In:  Supplement to: Nachtsheim, Dominik A; Ryan, Svenja; Schröder, Michael; Jensen, Laura; Oosthuizen, W Christiaan; Bester, Marthán Nieuwoudt; Hagen, Wilhelm; Bornemann, Horst (2019): Foraging behaviour of Weddell seals (Leptonychotes weddellii) in connection to oceanographic conditions in the southern Weddell Sea. Progress in Oceanography, 173, 165-179, https://doi.org/10.1016/j.pocean.2019.02.013
    Details
    Publication Date: 2023-03-16
    Description: The region of the Filchner Outflow System (FOS) in the southeastern Weddell Sea is characterized by intensive and complex interactions of different water masses. Dense Ice Shelf Water (ISW) emerging from beneath the ice shelf cavities on the continental shelf, meets Modified Warm Deep Water (MWDW) originating from the Antarctic Circumpolar Current at the sill of the Filchner Trough. These hydrographic features convert the FOS into an oceanographic key region, which may also show enhanced biological productivity and corresponding aggregations of marine top predators. In this context, six adult Weddell seals (Leptonychotes weddellii) were instrumented with CTD-combined satellite relay data loggers in austral summer 2014. By means of these long-term data loggers we aimed at investigating the influence of environmental conditions on the seals' foraging behaviour throughout seasons, focussing on the local oceanographic features. Weddell seals performed pelagic and demersal dives, mainly on the continental shelf, where they presumably exploited the abundant bentho-pelagic fish fauna. Diurnal and seasonal variations in light availability affected foraging activities. MWDW was associated with increased foraging effort. However, we observed differences in movements and habitat use between two different groups of Weddell seals. Seals tagged in the pack ice of the FOS focussed their foraging activities to the western and, partly, eastern flank of the Filchner Trough, which coincides with inflow pathways of MWDW. In contrast, Weddell seals tagged on the coastal fast ice exhibited typical central-place foraging and utilized resources close to their colony. High foraging effort in MWDW and high utilization of areas associated with an inflow of MWDW raise questions on the underlying biological features. This emphasizes the importance of further interdisciplinary ecological investigations in the near future, as the FOS may soon be impacted by predicted climatic changes.
    Keywords: Marine Mammal Tracking; MMT
    Type: Dataset
    Format: application/zip, 24 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Copepod community ingestion and respiration in the Eastern Atlantic Ocean during POLARSTERN cruise PS81 (ANT-XXIX/1) (2018)
    PANGAEA
    In:  University of Bremen, Marine Zoology | Supplement to: Bode, Maya; Koppelmann, Rolf; Teuber, Lena; Hagen, Wilhelm; Auel, Holger (2018): Carbon Budgets of Mesozooplankton Copepod Communities in the Eastern Atlantic Ocean-Regional and Vertical Patterns Between 24°N and 21°S. Global Biogeochemical Cycles, 32(5), 840-857, https://doi.org/10.1029/2017GB005807
    Details
    Publication Date: 2023-08-05
    Description: The copepods' impact on vertical carbon flux was assessed for stratified depth layers down to 2000 m at six stations along a transect between 24°N and 21°S in the eastern Atlantic Ocean in October/November 2012. Total copepod community consumption ranged from 202-604 mg C m⁻² day⁻¹, with highest ingestion rates in the tropical North Atlantic. Calanoids consumed 75-90% of the particulate organic carbon (POC) ingested by copepods, although the relative contribution of cyclopoids (mostly Oncaeidae) increased with depth. Net ingestion (=consumption - fecal pellet egestion) of POC varied from 106-379 mg C m⁻² day⁻¹ for calanoids and 37-51 mg C m⁻² day⁻¹ for cyclopoids, corresponding to 16-58% and 5-9%, respectively, of primary production (PP). In total, 9-33% and 2-5% of PP were respired as inorganic carbon by calanoids and cyclopoids, respectively. Copepod ingestion was highly variable between stations and depth layers, especially in the epi- and upper mesopelagic zone. Diel vertical migrants such as Pleuromamma enhanced the vertical flux to deeper layers, particularly in the region influenced by the Benguela Current. The impact of copepod communities on POC flux decreased below 1000 m and POC resources reaching the bathypelagic zone were far from being fully exploited by copepods. As key components, copepods are important mediators of carbon fluxes in the ocean. Their biomass, community composition and interactions strongly affect the magnitude of organic carbon recycled or exported to deeper layers. High variability, even at smaller vertical scales, emphasizes the complex dynamics of the biological carbon pump.
    Type: Dataset
    Format: application/zip, 2 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 5
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    (Table S2) Numbers and carapace widths of C. maenas and H. sanguineus sampled around Helgoland (2017)
    PANGAEA
    In:  Supplement to: Jungblut, Simon; Beermann, Jan; Boos, Karin; Saborowski, Reinhard; Hagen, Wilhelm (2017): Population development of the invasive crab Hemigrapsus sanguineus (De Haan, 1853) and its potential native competitor Carcinus maenas (Linnaeus, 1758) at Helgoland (North Sea) between 2009 and 2014. Aquatic Invasions, 12(1), 85-96, https://doi.org/10.3391/ai.2017.12.1.09
    Details
    Publication Date: 2023-11-14
    Description: The Asian shore crab Hemigrapsus sanguineus (De Haan, 1853) has recently established populations in the North Sea and now occurs within the native ranges of the green crab Carcinus maenas (Linnaeus, 1758). To determine potential competitive effects and to assess the progress of the invasion, species-specific population characteristics (numerical abundances, biomasses, and size distributions) of the two species around the island of Helgoland (German Bight, southern North Sea) were compared for surveys conducted in 2009 and 2014. Sampling sites were chosen based on accessibility and differed in their topography and wave exposure, which allowed testing for the influence of these factors on the establishment success of H. sanguineus. The numerical abundance and biomass of H. sanguineus increased markedly and approached those of C. maenas in 2014. At a sheltered site, H. sanguineus even outnumbered C. maenas, whereas the converse was observed at a site exposed to strong winds and waves. Although such contrasting abundance patterns between the native and the introduced shore crab may be the result of direct interference, the dominance of H. sanguineus at the sheltered site may also be explained by enhanced larval settling rates caused by odors of conspecifics. The results suggest that the invasion of H. sanguineus has not yet reached its equilibrium, and population abundances in the North Sea are expected to further increase in the future.
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 6
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    (Table S2) Numbers and carapace widths of Carcinus maenas sampled around Helgoland, August 2009 (2017)
    PANGAEA
    Details
    Publication Date: 2023-11-14
    Keywords: Augusta Mole; Carcinus maenas, carapax width; Carcinus maenas, female; Carcinus maenas, male; DATE/TIME; Event label; Felswatt; HAND; Helgoland, North Sea; Kringel; Latitude of event; Longitude of event; Nordstrand; Northeastern_site; Northwestern_site; Sampling by hand; Southeastern_site; Southwestern_site
    Type: Dataset
    Format: text/tab-separated-values, 565 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 7
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    (Table S2) Numbers and carapace widths of Hemigrapsus sanguineus sampled around Helgoland, August 2009 (2017)
    PANGAEA
    Details
    Publication Date: 2023-11-14
    Keywords: Augusta Mole; DATE/TIME; Event label; Felswatt; HAND; Helgoland, North Sea; Hemigrapsus sanguineus, carapax width; Hemigrapsus sanguineus, female; Hemigrapsus sanguineus, male; Kringel; Latitude of event; Longitude of event; Nordstrand; Northeastern_site; Northwestern_site; Sampling by hand; Southeastern_site; Southwestern_site
    Type: Dataset
    Format: text/tab-separated-values, 199 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 8
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    (Table S2) Numbers and carapace widths of Carcinus maenas sampled around Helgoland, August 2014 (2017)
    PANGAEA
    Details
    Publication Date: 2023-11-14
    Keywords: Augusta Mole; Carcinus maenas, carapax width; Carcinus maenas, female; Carcinus maenas, male; DATE/TIME; Event label; Felswatt; HAND; Helgoland, North Sea; Kringel; Latitude of event; Longitude of event; Nordstrand; Northeastern_site; Northwestern_site; Sampling by hand; Southeastern_site; Southwestern_site
    Type: Dataset
    Format: text/tab-separated-values, 543 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 9
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    (Table S2) Numbers and carapace widths of Hemigrapsus sanguineus sampled around Helgoland, August 2014 (2017)
    PANGAEA
    Details
    Publication Date: 2023-11-14
    Keywords: Augusta Mole; DATE/TIME; Event label; Felswatt; HAND; Helgoland, North Sea; Hemigrapsus sanguineus, carapax width; Hemigrapsus sanguineus, female; Hemigrapsus sanguineus, male; Kringel; Nordstrand; Northeastern_site; Northwestern_site; Sampling by hand; Southeastern_site; Southwestern_site
    Type: Dataset
    Format: text/tab-separated-values, 473 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 10
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    Abundance and distribution of planktonic Copepoda during POLARSTERN cruise PS81 (ANTXXIX/1) (2018)
    PANGAEA
    In:  University of Bremen, Marine Zoology | Supplement to: Bode, Maya; Hagen, Wilhelm; Cornils, Astrid; Kaiser, Patricia; Auel, Holger (2018): Copepod distribution and biodiversity patterns from the surface to the deep sea along a latitudinal transect in the eastern Atlantic Ocean (24°N to 21°S). Progress in Oceanography, 161, 66-77, https://doi.org/10.1016/j.pocean.2018.01.010
    Details
    Publication Date: 2023-08-05
    Description: Vertical distribution, community structure and diversity of calanoid copepods were studied at six stations along a latitudinal transect from 24°N to 21°S in the eastern Atlantic Ocean, resolving nine discrete depth layers to 2000 m. Total copepod abundances integrated from 0-2000 m ranged from 148,000 to 197,000 ind m-2. Usually, abundance and biomass were highest in the upper 100 m, exponentially decreasing with increasing depth. Only at the northern and southernmost stations, a deeper biomass maximum was observed at 100-200 m and 200-400 m, respectively. In total, 26 families, 79 genera and at least 172 species were identified among calanoid copepods. Although there were certain regional differences in species composition between tropical and subtropical stations from north to south, depth had the strongest impact on the community structure of calanoids, resulting in statistically distinct communities in different depth zones. Maximum diversity of calanoids was observed between 100-200 m in the tropical zone and between 400-700 m in subtropical regions. Various interacting mechanisms such as vast spatial extent of the ecosystem, physical stability, avoidance from predators under dim light, small population sizes and high biologically generated heterogeneity possibly contribute to the biodiversity maxima in the twilight zone.
    Keywords: Acartia spp.; Acrocalanus spp.; Aetideidae, copepodites; Aetideopsis carinata; Aetideopsis rostrata; Aetideopsis sp.; Aetideus acutus; Aetideus arcuatus; Aetideus armatus; Aetideus bradyi; Aetideus giesbrechti; Amallothrix spp.; ANT-XXIX/1; Arietellus spp.; Augaptilidae; Augaptilus longicaudatus; Augaptilus megalurus; Augaptilus spp.; Brodskius cf. paululus; Calanidae, copepodites; Calanoida, copepodites; Calanoida, total; Calanoides natalis; Calanus sp.; Calocalanus spp.; Canarias Sea; Candacia spp.; Centraugaptilus sp.; Centropages bradyi; Cephalophanes spp.; Chiridiella smoki; Chiridiella sp.; Chiridius spp.; Chirundina streetsii; Clausocalanus spp.; Comment; Counting, copepoda; Ctenocalanus vanus; Date/Time of event; Delibus cf. nudus; Depth, bottom/max; Depth, top/min; DEPTH, water; Disco spp.; Disseta palumbii; Elevation of event; Euaugaptilus spp.; Eucalanus hyalinus; Euchaeta acuta; Euchaeta marina; Euchaeta media; Euchaeta paraconcinna; Euchaeta spp.; Euchaetidae, copepodites; Euchirella amoena; Euchirella curticauda; Euchirella pulchra; Euchirella rostrata; Euchirella splendens; Euchirella spp.; Event label; Falsilandrumius sp.; Farrania spp.; Gaetanus armiger; Gaetanus brevicornis; Gaetanus brevispinus; Gaetanus kruppii; Gaetanus latifrons; Gaetanus miles; Gaetanus minor; Gaetanus pileatus; Gaetanus spp.; Gaetanus tenuispinus; Gaussia princeps; Haloptilus acutifrons; Haloptilus austini; Haloptilus fons; Haloptilus mucronatus; Haloptilus oxycephalus; Haloptilus plumosus; Haloptilus spiniceps; Haloptilus spp.; Hemirhabdus sp.; Heteramalla sarsi; Heterorhabdus spinifrons; Heterorhabdus spp.; Heterostylites major; Labidocera spp.; Latitude of event; Longitude of event; Lophothrix frontalis; Lophothrix humilifrons; Lophothrix latipes; Lophothrix quadrispinosa; Lophothrix similis; Lophothrix spp.; Lucicutia aurita; Lucicutia bicornuta; Lucicutia curta; Lucicutia grandis; Lucicutia lucida; Lucicutia macrocera; Lucicutia magna; Lucicutia spp.; Lucicutia wolfendeni; Mecynocera clausi; Megacalanus princeps; Mesocalanus tenuicornis; Metridia brevicauda; Metridia curticauda; Metridia discreta; Metridia effusa; Metridia lucens; Metridia princeps; Metridia spp., copepodites; Metridia venusta; Microcalanus spp.; Mimocalanus spp.; Monacilla tenera; Monacilla typica; Mospicalanus sp.; MSN; Multiple opening/closing net; Nannocalanus minor; Neocalanus gracilis; Neocalanus robustior; Nullosetigera bidentata; Nullosetigera helgae; Nullosetigera impar; Nullosetigera mutica; Nullosetigera spp.; Oithonidae; Oncaeidae; Onchocalanus sp.; Paracalanus spp.; Paraeuchaeta aequatorialis; Paraeuchaeta gracilis; Paraeuchaeta sp.; Paraeuchaeta spp.; Paraheterorhabdus cf. compactus; Paraugaptilus sp.; Pareucalanus cf. sewelli; Phaenna spinifera; Phaennidae; Pleuromamma abdominalis; Pleuromamma borealis; Pleuromamma quadrungulata; Pleuromamma robusta; Pleuromamma spp.; Pleuromamma xiphias; Polarstern; Pontellina spp.; PS81; PS81/005-6; PS81/008-6; PS81/009-4; PS81/010-3; PS81/014-4; PS81/017-7; Pseudhaloptilus sp.; Pseudoamallothrix spp.; Pseudochirella sp.; Rhincalanus cornutus; Rhincalanus nasutus; Scaphocalanus spp.; Scolecithricella maritima; Scolecithricella spp.; Scolecithricella vittata; Scolecithrix bradyi; Scolecithrix danae; Scolecitrichidae; Scolecitrichopsis ctenopus; Scolecitrichopsis sp.; Scolecitrichopsis tenuipes; Scottocalanus helenae; Scottocalanus persecans; Scottocalanus securifrons; South Atlantic Ocean; Spinocalanus spp.; Subeucalanus mucronatus; Subeucalanus spp.; Subeucalanus subtenuis; Temora stylifera; Temorites brevis; Temorites elongata; Temorites minor; Temorites sarsi; Temorites spp.; Temoropia mayumbaensis; Temoropia minor; Teneriforma spp.; Tharybis sp.; Undeuchaeta cf. major; Undinella spp.; Undinula vulgaris; Valdiviella sp.; Volume
    Type: Dataset
    Format: text/tab-separated-values, 9412 data points
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