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  • 1
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    Chlorophyll-a, primary production rates, carbon concentrations and cell counts of coccolithophores, diatoms and microzooplankton measured in water samples from the North Atlantic during the M87/1 cruise in April 2012 (2013)
    PANGAEA
    In:  Supplement to: Daniels, Chris J; Poulton, Alex J; Esposito, Mario; Paulsen, Maria Lund; Bellerby, Richard G J; St John, M; Martin, Adrian Peter (2015): Phytoplankton dynamics in contrasting early stage North Atlantic spring blooms: composition, succession, and potential drivers. Biogeosciences, 12(8), 2395-2409, https://doi.org/10.5194/bg-12-2395-2015
    Details
    Publication Date: 2024-02-02
    Description: The Deep Convection cruise repeatedly sampled two locations in the North Atlantic, sited in the Iceland and Norwegian Basins, onboard the RV Meteor (19 March - 2 May 2012). Samples were collected from multiple casts of a conductivity-temperature-depth (CTD) - Niskin rosette at each station. Water samples for primary production rates, community structure, chlorophyll a [Chl a], calcite [PIC], particulate organic carbon [POC] and biogenic silicic acid [BSi] were collected from predawn casts from six light depths (55%, 20%, 14%, 7%, 5% and 1% of incident PAR). Additional samples for community structure and ancillary parameters were collected from a second cast. Carbon fixation rates were determined using the 13C stable isotope method. Water samples for diatom and micro zooplankton counts, collected from the predawn casts, were preserved with acidic Lugol's solution (2% final solution) and counted using an inverted light microscope. Water samples for coccolithophore counts were collected onto cellulose nitrate filters and counted using polarising light microscopy. Water samples for Chl a analysis were filtered onto MF300 and polycarbonate filters and extracted in 90% acetone. PIC and BSi samples were filtered onto polycarbonate filters and analysed using an inductively coupled plasma emission optical spectrometer and a SEAL QuAAtro autoanalyser respectively.
    Keywords: Basin Scale Analysis, Synthesis and Integration; Biogenic silica; Bottle number; Carbon, inorganic, particulate; Carbon, organic, particulate; Chaetoceros spp.; Chlorophyll a as carbon; Ciliates; Coccolithus leptoporus; Coccolithus pelagicus; Coronosphaera mediterranea; Counting; Cryptophytes; CTD/Rosette; CTD-RO; Cylindrotheca spp.; Dactyliosolen spp.; Date/Time of event; Deep Convection Cruise; DEPTH, water; Diatoms, centrales indeterminata; Diatoms, pennales indeterminata; Dinoflagellates, armoured; Emiliania huxleyi; EURO-BASIN; Event label; Guinardia striata; Gymnodinium spp.; Gyrodinium spp.; Latitude of event; Leptocylindrus spp.; Longitude of event; M87/1_413-1; M87/1_421-1; M87/1_447-1; M87/1_460-1; M87/1_516-1; M87/1_532-1; M87/1_553-1; M87/1_572-1; M87/1_614-1; M87/1_618-1; M87/1_641-1; M87/1_667-1; M87/1_672-1; M87/1_689-1; M87/1a; M87/1b; Meteor (1986); Navicula spp.; Primary production, carbon assimilation (24 hr.); Pseudo-nitzschia spp.; Rhizosolenia spp.; Silicoflagellates; Station 1; Station 2; Syracosphaera pulchra; Thalassionema spp.; Thalassiosira spp.
    Type: Dataset
    Format: text/tab-separated-values, 832 data points
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    DATA PANGAEA
  • 2
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    Marine Biodiversität - Vielfalt des Lebens (2010)
    In:  EPIC3Bremerhaven : DFG Senatskommission für Ozeanographie & Konsortium Deutsche Meeresforschung
    Details
    Publication Date: 2018-03-02
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , notRev
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    PAPER (OA)
  • 3
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    Fatty Acid Trophic Markers in the Pelagic Marine Environment (2003)
    In:  EPIC3Advances in marine biology, 46, pp. 225-340
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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    PAPER (OA)
  • 4
    Electronic Resource
    Electronic Resource
    Nutritional condition and vertical distribution of Baltic cod larvae (1997)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 51 (1997), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Newly hatched Baltic cod Gadus morhua larvae are typically found at depths 〉60 m. This is a region of low light and prey availability, hence generating the hypothesis that larvae have to migrate from hatching depth to the surface layer to avoid starvation and improve their nutritional condition. To test this hypothesis, Baltic cod larvae were sampled during the spawning seasons of 1994 and 1995 with depth-resolving multiple opening/closing nets. Each larva was aged by otolith readings and its RNA/DNA ratio was determined as a measure of nutritional condition. The RNA/DNA ratios of these larvae aged 2-25 days (median 10 days) ranged from 0.4 to 6.2, corresponding to levels exhibited by starving and fast-growing larvae in laboratory calibration studies (starvation, protein growth rate, Gpi= -12.2% day−1; fastgrowing larvae, Gpi=14.1%day−1) respectively. Seventy per cent of the field caught larvae had RNA/DNA ratios between the mean values found for starving and fed laboratory larvae. Only larvae aged 8-11 days had higher mean RNA/DNA ratios above 45 m than below (t-test, P〈0.05). However, the instantaneous protein growth rates were significantly higher for all larval age groups in the surface layers (t-test, P〈0.05). Starving larvae were found in all depths sampled (10-85 m), whereas growing larvae (positive Gpi) were restricted to samples taken shallower than 45 m. These superior growth rates above 45 m corroborate the hypothesis and imply that migration to the shallow water layers is a prerequisite for good nutritional condition, growth and survival of Baltic cod larvae. The frequent occurrence of cod larvae older than 8 days in the deep water in poor condition suggests that a proportion of the larvae will die from Starvation in the deep layers of the Baltic Sea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.1997.tb06108.x
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    Paper (German National Licenses)
    Fulltext
  • 5
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    Transregional linkages in the north-eastern atlantic - An 'end-to-end' analysis of pelagic ecosystems (2009)
    CRC Pr.
    In:  Oceanography and Marine Biology - An Annual Review, 47 . pp. 1-76.
    Details
    Publication Date: 2014-01-27
    Description: This review examines interregional linkages and gives an overview perspective on marine ecosystem functioning in the north-eastern Atlantic. It is based on three of the 'systems' considered by the European Network of Excellence for Ocean Ecosystems Analysis (EUR-OCEANS was established in 2004 under the European Framework VI funding programme to promote integration of marine ecological research within Europe), the Arctic and Nordic Seas, North Atlantic shelf seas and North Atlantic. The three systems share common open boundaries and the transport of water, heat, nutrients and particulates across these boundaries modifies local processes. Consistent with the EUR-OCEANS concept of 'end-to-end' analyses of marine food webs, the review takes an integrated approach linking ocean physics, lower trophic levels and working up the food web to top predators such as marine mammals. We begin with an overview of the regions focusing on the major physical patterns and their implications for the microbial community, phytoplankton, zooplankton, fish and top predators. Human-induced links between the regional systems are then considered and finally possible changes in the regional linkages over the next century are discussed. Because of the scale of potential impacts of climate change, this issue is considered in a separate section. The review demonstrates that the functioning of the ecosystems in each of the regions cannot be considered in isolation and the role of the atmosphere and ocean currents in linking the North Atlantic Ocean, North Atlantic shelf seas and the Arctic and Nordic Seas must be taken into account. Studying the North Atlantic and associated shelf seas as an integrated 'basin-scale' system will be a key challenge for the early twenty-first century. This requires a multinational approach that should lead to improved ecosystem-based approaches to conservation of natural resources, the maintenance of biodiversity, and a better understanding of the key role of the north-eastern Atlantic in the global carbon cycle. © R.N. Gibson, R.J.A. Atkinson, and J.M.D. Gordon, Editors Talyor & Francis.
    Type: Article , PeerReviewed
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 6
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    Fish stock development in the central Baltic Sea (1976-2000) in relation to variability in the environment (2003)
    ICES
    In:  ICES Marine Science Symposia, 219 . pp. 294-306.
    Details
    Publication Date: 2018-03-20
    Description: Fish stock development in the Central Baltic Sea (1976-2000) in relation to variability in the environment - DTU Orbit (15/04/14) Fish stock development in the Central Baltic Sea (1976-2000) in relation to variability in the environment - DTU Orbit (15/04/14) Köster F, Möllmann C, Neuenfeldt S, Vinther M, St. John M, Tomkiewicz J et al. Fish stock development in the Central Baltic Sea (1976-2000) in relation to variability in the environment. I C E S Marine Science Symposia. 2003;219:294-306
    Type: Article , PeerReviewed
    Format: text
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    OceanRep: Article in a Scientific Journal - peer-reviewed
  • 7
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    REsolving Trophodynamic CoNsequences of Climate ChaNge (2008)
    In:  [Talk] In: RECONN Project Cluster Introduction, Aquashift-Workshop, 27.09, Konstanz .
    Details
    Publication Date: 2012-02-23
    Type: Conference or Workshop Item , NonPeerReviewed
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    OceanRep: Talk
  • 8
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    Stock-recruitment relationships of Baltic cod incorporating enviromental variability and spatial heterogeneity (1999)
    ICES
    In:  ICES Council Meeting Papers, Y:26 . ICES, Kopenhagen, Denmark, 45 pp.
    Details
    Publication Date: 2019-09-06
    Type: Report , NonPeerReviewed
    Format: text
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    OceanRep: Report - other report
  • 9
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    Baltic cod: resolving processes determining spatil and temporal windows of survival (2000)
    In:  [Paper] In: ICES Council Meeting 2000, 27.-30.09.2000, Brügge, Belgium .
    Details
    Publication Date: 2020-05-06
    Type: Conference or Workshop Item , NonPeerReviewed
    Format: text
    Location Call Number Limitation Availability
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    OceanRep: Conference paper
  • 10
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    Oceanographic processes influencing seasonal and interannual variability in cod spawning habitat in the eastern Baltic Sea (1996)
    In:  [Paper] In: ICES Council Meeting 1996, 27.9.-04.10.1996, Reykjavik, Iceland .
    Details
    Publication Date: 2020-05-06
    Description: The volume of water with suitable oxygen and salinity conditions for survival and development of cod/eggs in the eastern Baltie Sea varies significantly within and among years. It has recently been shown that this volume of water (nreproduetive volumen), in addition to spawning stock biomass, is a major factor determining recruitment success in this eod population. However, it is unclear which oceanographie mechanisms are responsible for variability in reproductive volume, and how these processes interaet on a seasonal and interannual basis. In this study, we use time series observations to identify inter-relationships between hydrographie and biological processes (e. g., inflows of North Sea water, winter mixing processes, production and decomposition of organic matter) influencing reproductive volumes from 1952-1992. A frequent pattern of seasonal variability in 4 eastern Baltic spawning areas includes a spring maximum which decreases during the summer, followed by an inerease during the fall-winter months. However, this general pattern is violated in many years, and the magnitude of the seasonality is more pronounced, in some spawning areas than others. \Ve have begun to analyse these patterns and interpret them in the context of other fluctuating components of the eastern Baltic pelagic ecosystem. Preliminary results show that reproductive volumes deerease by an average of 9 - 39% between May and August, and that the decrease in the spawning area most important to long-term recruitment (Bornholm Basin) is temperature-dependen1. The seasonal decline in the Bomholm Basin also tends to be larger and more variable after 1964 than in the previous 12-year periode These patterns of reproductive volume variability may be important to eod reproduetive success beeause of a long and variable spawning period.
    Type: Conference or Workshop Item , NonPeerReviewed
    Format: text
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    OceanRep: Conference paper
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