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  • 2015-2019  (17)
  • 2015  (17)
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  • 2015-2019  (17)
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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
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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
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    DATA PANGAEA
  • 3
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    Fatty acid and stable isotope composition of calanoid copepods in the open eastern Atlantic Ocean during POLARSTERN cruise ANT-XXIX/1 (2015)
    PANGAEA
    In:  Supplement to: Bode, Maya; Hagen, Wilhelm; Schukat, Anna; Teuber, Lena; Fonseca-Batista, Debany; Dehairs, Frank; Auel, Holger (2015): Feeding strategies of tropical and subtropical calanoid copepods throughout the eastern Atlantic Ocean – Latitudinal and bathymetric aspects. Progress in Oceanography, 138, 268-282, https://doi.org/10.1016/j.pocean.2015.10.002
    Details
    Publication Date: 2024-03-09
    Description: The majority of global ocean production and total export production is attributed to oligotrophic oceanic regions due to their vast regional expanse. However, energy transfers, food-web structures and trophic relationships in these areas remain largely unknown. Regional and vertical inter- and intra-specific differences in trophic interactions and dietary preferences of calanoid copepods were investigated in four different regions in the open eastern Atlantic Ocean (38°N to 21°S) in October/November 2012 using a combination of fatty acid (FA) and stable isotope (SI) analyses. Mean carnivory indices (CI) based on FA trophic markers generally agreed with trophic positions (TP) derived from d15N analysis. Most copepods were classified as omnivorous (CI ~0.5, TP 1.8 to ~2.5) or carnivorous (CI 〉=0.7, TP 〉=2.9). Herbivorous copepods showed typical CIs of 〈=0.3. Geographical differences in d15N values of epi- (200-0 m) to mesopelagic (1000-200 m) copepods reflected corresponding spatial differences in baseline d15N of particulate organic matter from the upper 100 m. In contrast, species restricted to lower meso- and bathypelagic (2000-1000 m) layers did not show this regional trend. FA compositions were species-specific without distinct intra-specific vertical or spatial variations. Differences were only observed in the southernmost region influenced by the highly productive Benguela Current. Apparently, food availability and dietary composition were widely homogeneous throughout the oligotrophic oceanic regions of the tropical and subtropical Atlantic. Four major species clusters were identified by principal component analysis based on FA compositions. Vertically migrating species clustered with epi- to mesopelagic, non-migrating species, of which only Neocalanus gracilis was moderately enriched in lipids with 16% of dry mass (DM) and stored wax esters (WE) with 37% of total lipid (TL). All other species of this cluster had low lipid contents (〈 10% DM) without WE. Of these, the tropical epipelagic Undinula vulgaris showed highest portions of bacterial markers. Rhincalanus cornutus, R. nasutus and Calanoides carinatus formed three separate clusters with species-specific lipid profiles, high lipid contents (〉=41% DM), mainly accumulated as WE (〉=79% TL). C. carinatus and R. nasutus were primarily herbivorous with almost no bacterial input. Despite deviating feeding strategies, R. nasutus clustered with deep-dwelling, carnivorous species, which had high amounts of lipids (〉=37% DM) and WE (〉=54% TL). Tropical and subtropical calanoid copepods exhibited a wide variety of life strategies, characterized by specialized feeding. This allows them, together with vertical habitat partitioning, to maintain high abundance and diversity in tropical oligotrophic open oceans, where they play an essential role in the energy flux and carbon cycling.
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 4
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    Stable isotope composition of calanoid copepods in the open eastern Atlantic Ocean during POLARSTERN cruise ANT-XXIX/1 (2015)
    PANGAEA
    Details
    Publication Date: 2024-03-09
    Keywords: ANT-XXIX/1; Canarias Sea; Carbon, total; Carbon/Nitrogen ratio; Date/Time of event; Depth, bottom/max; Depth, top/min; Dry mass per individual; Elevation of event; Event label; Latitude of event; Lipid corrected d13C/12C for crustaceans; Longitude of event; MSN; Multiple opening/closing net; Nitrogen, total; Number of individuals; Polarstern; PS81; PS81/001-3; PS81/002-3; PS81/004-4; PS81/005-6; PS81/007-2; PS81/008-6; PS81/009-4; PS81/010-3; PS81/011-4; PS81/012-4; PS81/013-6; PS81/014-4; PS81/015-2; PS81/016-4; PS81/017-7; South Atlantic Ocean; Species; Stage; Station label; δ13C/12C ratio; δ15N/14N ratio
    Type: Dataset
    Format: text/tab-separated-values, 4432 data points
    Location Call Number Limitation Availability
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  • 5
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    Electron transport system (ETS) activity and respiration rates of pelagic decapods from the Benguela upwelling system during D356 and MSM17/3 (2015)
    PANGAEA
    Details
    Publication Date: 2024-03-13
    Keywords: Benguela Upwelling; D356; D356-11_5; D356-15_2; D356-21_2_1; D356-23_2; D356-32_5; D356-8_1; Date/Time of event; Depth, bottom/max; Depth, top/min; DEPTH, water; Discovery (1962); Double MOCNESS 333; Dry mass per individual; Duration; Electron transport system activity of oyxgen; Electron transport system activity of oyxgen per individual; Event label; GENUS; Geochemistry and ecology of the Namibian upwelling system; Latitude of event; Life stage; Longitude of event; Maria S. Merian; MOC-D-333; MOC-S-2000; MSM17/3; MSM17/3_246-8; MSM17/3_292-9; MSM17/3_298-12; MSM17/3_301-2; MSM17/3_310-3; MSM17/3_315-5; Respiration rate, oxygen; Respiration rate, oxygen, per individual; Ring trawl; RTR; Sample ID; Singel MOCNESS 2000; Species; T1-1; T1-3a; T5-1a; T5-2; T8-1d; Temperature, technical; Wet mass per individual; WKT-2b
    Type: Dataset
    Format: text/tab-separated-values, 637 data points
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    DATA PANGAEA
  • 6
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    Abundance of pelagic decapods in the northern Benguela upwelling system during AFR258, D356 and MSM17/3 (2015)
    PANGAEA
    Details
    Publication Date: 2024-03-13
    Keywords: Abundance per area; Abundance per volume; AFR258; AFR258_30254_7; AFR258_30257_7; AFR258_30259_6; AFR258_30260_7; AFR258_30261_6; AFR258_30263_6; Africana (1982); Benguela Upwelling; D356; D356-15_3; D356-16_3; D356-23_2; D356-25_1; D356-28_6; D356-8_1; D356-8_2_6_2; Date/Time of event; Depth, bottom/max; Depth, top/min; DEPTH, water; Discovery (1962); Double MOCNESS 333; Event label; GENUS; Geochemistry and ecology of the Namibian upwelling system; Latitude of event; Life stage; Longitude of event; Maria S. Merian; MOC-D-333; MOC-S-2000; MSM17/3; MSM17/3_241-13; MSM17/3_242-13; MSM17/3_242-9; MSM17/3_243-1; MSM17/3_243-12; MSM17/3_250-7; MSM17/3_292-9; MSM17/3_295-12; MSM17/3_295-6; MSM17/3_298-12; MSM17/3_298-8; MSM17/3_306-13; MSM17/3_307-11; MSM17/3_307-2; MSM17/3_309-11; MSM17/3_309-2; MSM17/3_310-3; MSM17/3_310-7; PHY-NET; Phytoplankton net, Apstein-type; Singel MOCNESS 2000; Species; T1-1; T1-2; T-1-2_6; T1-3a; T1-4a; T-2-2_7; T5-1; T-5-1_7; T5-1a; T-5-1a_7; T5-2; T8-1; T8-1a; T-8-1a_6; T8-1b; T8-1c; T-8-3_6
    Type: Dataset
    Format: text/tab-separated-values, 1626 data points
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  • 7
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    Abundance, Electron transport System (ETS) activity and respiration rates of pelagic decapods from the Benguela upwelling system during AFR258, D356 and MSM17/3 (2015)
    PANGAEA
    In:  Supplement to: Schukat, Anna; Bode, Maya; Auel, Holger; Carballo, Rodrigo; Martin, Bettina; Koppelmann, Rolf; Hagen, Wilhelm (2013): Pelagic decapods in the northern Benguela upwelling system: Distribution, ecophysiology and contribution to active carbon flux. Deep Sea Research Part I: Oceanographic Research Papers, 75, 146-156, https://doi.org/10.1016/j.dsr.2013.02.003
    Details
    Publication Date: 2024-03-13
    Description: Decapods were sampled with a 1 m**2 MOCNESS (mainly upper 1000 m) in the northern Benguela Current during three cruises in December 2009, September/October 2010 and February 2011. Although pelagic decapods are abundant members of the micronekton community, information about their ecophysiology is very limited. Species-specific regional distribution limits were detected for various decapod species (e.g. Plesionika carinata, Sergestes arcticus, Pasiphaea semispinosa). Significant diel vertical migration patterns were determined for three caridean and three penaeiodean species. Biomass was variable and ranged from 23 to 2770 mg dry mass m**-2 with highest values for P. semispinosa. Fatty acid and stable isotope analyses revealed that the examined decapod species are omnivorous tocarnivorous except for the herbivorous to omnivorous species P. carinata. Calanid copepods such as Calanoides carinatus were identified as an important prey item especially for caridean species. Community consumption rates of pelagic decapods derived from respiration rates ranged from 7 mg C m**-2 d**-1 (231S) to 420 mg C m**-2 d**-1 (191S, 171S). A potential active respiratory carbon flux was calculated for migrating pelagic decapods with 4.4 mg C m**- d**-1 for the upper 200 m and with 2.6 mg C m**-2 d**-1 from the base of the euphotic zone to a depth of 600 m. Overall, pelagic decapods apparently play a more prominent role in the northern Benguela Current ecosystem than previously assumed and may exert a substantial predation impact on calanid copepods (up to 13% d**-1 of standing stock).
    Keywords: GENUS; Geochemistry and ecology of the Namibian upwelling system
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 8
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    Fatty acid composition of calanoid copepods in the open eastern Atlantic Ocean during POLARSTERN cruise ANT-XXIX/1 (2015)
    PANGAEA
    Details
    Publication Date: 2024-04-24
    Keywords: 6,9,12,15-Hexadecatetraenoic acid of total fatty acids; 6,9,12-Hexadecatrienoic acid of total fatty acids; 9,12-Hexadecadienoic acid of total fatty acids; 9-Tetradecenoic acid of total fatty acids; all-cis-11,14,17-Eicosatrienoic acid of total fatty acids; all-cis-11,14-Eicosadienoic acid of total fatty acids; all-cis-11,14-Octadecadienoic acid of total fatty acids; all-cis-13,16-Docosadienoic acid of total fatty acids; all-cis-4,7,10,13,16,19-Docosahexaenoic acid of total fatty acids; all-cis-5,8,11,14,17-Eicosapentaenoic acid of total fatty acids; all-cis-5,8,11,14-Eicosatetraenoic acid of total fatty acids; all-cis-6,9,12,15-Octadecatetraenoic acid of total fatty acids; all-cis-6,9,12-Octadecatrienoic acid of total fatty acids; all-cis-7,10,13,16,19-Docosapentaenoic acid of total fatty acids; all-cis-8,11,14,17-Eicosatetraenoic acid of total fatty acids; all-cis-8,11,14-Eicosatrienoic acid of total fatty acids; all-cis-8,11,14-Octadecatrienoic acid of total fatty acids; all-cis-9,12,15-Octadecatrienoic acid of total fatty acids; all-cis-9,12-Octadecadienoic acid of total fatty acids; ANT-XXIX/1; Canarias Sea; cis-11-Docosenoic acid of total fatty acids; cis-11-Hexadecenoic acid of total fatty acids (IUPAC: (11Z)-hexadec-11-enoic acid); cis-11-Icosenoic acid of total fatty acids; cis-11-Octadecenoic acid of total fatty acids (IUPAC: Octadec-11-enoic acid); cis-13-Docosenoic acid of total fatty acids; cis-13-Icosenoic acid of total fatty acids; cis-13-Octadecenoic acid of total fatty acids; cis-15-Docosenoic acid of total fatty acids; cis-15-Tetracosenoic acid of total fatty acids; cis-7-Hexadecenoic acid of total fatty acids; cis-9-Hexadecenoic acid of total fatty acids (IUPAC: (9Z)-hexadec-9-enoic acid); cis-9-Hexadecenol of total fatty alcohols; cis-9-Icosanoic acid of total fatty acids; cis-9-Octadecenoic acid of total fatty acids (IUPAC: Octadec-9-enoic acid); Date/Time of event; Depth, bottom/max; Depth, top/min; Docosanoic acid of total fatty acids; Docosatetraenoic acid 22:4(n-3) of total fatty acids; Dry mass; Elevation of event; Event label; Fatty alcohols; Heptadecanoic acid of total fatty acids; Hexadecanoic acid of total fatty acids; Hexadecanol of total fatty alcohols; Icosanoic acid of total fatty acids; iso-Heptadecanoic acid of total fatty acids (IUPAC: 15-methylhexadecanoic acid); iso-Pentadecanoic acid of total fatty acids (IUPAC: 13-methyltetradecanoic acid); Latitude of event; Lipids; Longitude of event; MSN; Multiple opening/closing net; Number of individuals; Octadecanoic acid of total fatty acids; Octadecanol of total fatty alcohols; Octadecenol of total fatty alcohols; Pentadecanoic acid of total fatty acids; Phytanic acid of total fatty acids; Polarstern; PS81; PS81/005-6; PS81/007-2; PS81/008-6; PS81/009-4; PS81/010-3; PS81/011-4; PS81/012-4; PS81/013-6; PS81/014-4; PS81/015-2; PS81/016-4; PS81/017-7; Sample ID; South Atlantic Ocean; Species; Stage; Station label; Tetracosenoic acid 24:1(n-11) of total fatty acids; Tetradecanoic acid of total fatty acids; Tetradecanol of total alcohols; Wax esters
    Type: Dataset
    Format: text/tab-separated-values, 10265 data points
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  • 9
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    The occurrence of the Asian shore crab in the German Bight - Coexistence or displacement? (2015)
    In:  EPIC350th European Marine Biology Symposium, Helgoland, Germany, 2015-09-21-2015-09-25Germany
    Details
    Publication Date: 2016-05-04
    Description: The Asian shore crab Hemigrapsus sanguineus was initially introduced to the French Atlantic coast in the late 1990´s. Since then it has successfully established persistent populations along the European Atlantic coasts propagating further north. The invasive crab was found in the German part of the Wadden Sea for the first time in 2007 and at Helgoland in 2008. There, it now shares its intertidal habitat with the native European green crab Carcinus maenas. In order to test for potential interspecific effects between these two ecological equivalents, we analysed populations of both species in the rocky intertidal of the island of Helgoland (German Bight, North Sea) in 2009 and 2014. Numbers of animals and their biomasses of both species from four sites around the island were recorded. Although mean abundances of H. sanguineus around Helgoland more than doubled from 2009 to 2014, they were still lower than the abundances of C. maenas, which were similar between the years. In contrast, mean biomass of C. maenas slightly decreased from 2009 to 2014, while values for H. sanguineus increased almost sevenfold. Differences between sites may be due to differences in local habitat characteristics such as topography, algae coverage, wave exposure, and/or predation risk. Nonetheless, the results showed that both species co-occur and reproduce in the rocky intertidal of Helgoland, providing no clear evidence for a displacement of either species.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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  • 10
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    Temperature and salinity tolerance of the Asian shore crab Hemigrapsus sanguineus (2015)
    In:  EPIC317. Crustaceologen-Tagung, Bremerhaven, Germany, 2015-03-26-2015-03-29Bremerhaven
    Details
    Publication Date: 2016-05-04
    Description: The Asian shore crab Hemigrapsus sanguineus is a recent invader of intertidal ecosystems along the western European coasts and the North Sea. In order to estimate whether this species is capable of colonizing the estuarine areas of the larger rivers, we studied the tolerance of the crabs towards extreme temperatures and salinities as they can appear in shallow tidal pools and during the outflow of riverine water, respectively. Individuals of H. sanguineus were incubated at salinities of 0, 10, 20, 30 and 40 and tem-peratures of 5, 10, 15 and 20°C. The animals were removed from the basins after 1, 5 and 10 days and tested for their ability to right into the normal position when turned on their backsides. Independent of the incubation time, all crabs showed average maximum righting times of up to 5 s at temperatures of 10, 15 and 20°C and salinities of 10 to 40. In freshwater, righting times were considerably extended at any temperature and mortality was high. Longer righting times were also observed at the lowest temperature of 5°C. Our preliminary results show that H. sanguineus is highly tolerant towards a wide range of temperatures and salinities which characterizes this species as highly adapted to changing environmental conditions. However, H. sanguineus cannot persist in fresh¬water conditions which prevents this species to colonize inner estuarine regions. Future studies on the osmoregula¬tion capacities and respiration rates will better define the thermal and osmotic limits of adult and juvenile Asian shore crabs.
    Repository Name: EPIC Alfred Wegener Institut
    Type: Conference , notRev
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