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  • 1
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    Statistically assessing the correlation between salinity and morphology in cysts produced by the dinoflagellate Protoceratium reticulatum from surface sediments of the North Atlantic Ocean, Mediterranean–Marmara–Black Sea region, and Baltic–Kattegat–Skagerrak estuarine system (2014)
    In:  EPIC3Palaeogeography, Palaeoclimatology, Palaeoecology, 399, pp. 202-213, ISSN: 00310182
    Details
    Publication Date: 2017-05-30
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
    Location Call Number Limitation Availability
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    PAPER (OA)
  • 2
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    Occurrence of Selenopemphix undulata sp. nov in late Quaternary sediments of the Pacific Ocean (2011)
    PANGAEA
    In:  Supplement to: Verleye, Thomas; Pospelova, Vera; Mertens, Kenneth Neil; Louwye, Stephen (2011): The geographical distribution and (palaeo)ecology of Selenopemphix undulata sp. nov., a new late Quaternary dinoflagellate cyst from the Pacific Ocean. Marine Micropaleontology, 78(3-4), 65-83, https://doi.org/10.1016/j.marmicro.2010.10.001
    Details
    Publication Date: 2024-01-09
    Description: Detailed palynological studies in the northeast (NE) Pacific, Strait of Georgia (BC, Canada), southeast (SE) Pacific and northwest Pacific (Dongdo Bay, South Korea) resulted in the recognition of the new dinoflagellate cyst species Selenopemphix undulata sp. nov. This species is restricted to cool temperate to sub-polar climate zones, where it is found in highest relative abundances in highly productive non- to reduced upwelling regions with an annual mean sea-surface temperature (aSST) below 16 °C and an annual mean sea-surface salinity (aSSS) between 20 and 35 psu. Those observations are in agreement with the late Quaternary fossil records from Santa Barbara Basin (ODP 893; 34°N) and offshore Chile (ODP 1233; 41°S), where this species thrived during the last glacial. This period was characterised by high nutrient availability and the absence of species favouring upwelling conditions. The indirect dependence of S. undulata sp. nov. abundances on nutrient availability during reduced or non-upwelling periods is expressed by the synchronous fluctuations with diatom abundances, since the distribution and growth rates of the latter are directly related with the availability of macronutrients in the surface waters.
    Keywords: 146-893; 202-1233; COMPCORE; Composite Core; Joides Resolution; Leg146; Leg202; North Pacific Ocean; Ocean Drilling Program; ODP; South-East Pacific
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 3
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    Glacial cold-water coral: ages, isotope concentrations and ratios (2011)
    PANGAEA
    In:  Supplement to: Wienberg, Claudia; Frank, Norbert; Mertens, Kenneth Neil; Stuut, Jan-Berend W; Marchant, Margarita; Fietzke, Jan; Mienis, Furu; Hebbeln, Dierk (2010): Glacial cold-water corals growth in the Gulf of Cádiz: Implications of increased palaeo-productivity. Earth and Planetary Science Letters, 298, 405-416, https://doi.org/10.1016/j.epsl.2010.08.017
    Details
    Publication Date: 2024-04-18
    Description: A set of 40 Uranium-series datings obtained on the reef-forming scleractinian cold-water corals Lophelia pertusa and Madrepora oculata revealed that during the past 400 kyr their occurrence in the Gulf of Cádiz (GoC) was almost exclusively restricted to glacial periods. This result strengthens the outcomes of former studies that coral growth in the temperate NE Atlantic encompassing the French, Iberian and Moroccan margins dominated during glacial periods, whereas in the higher latitudes (Irish and Norwegian margins) extended coral growth prevailed during interglacial periods. Thus it appears that the biogeographical limits for sustained cold-water coral growth along the NE Atlantic margin are strongly related to climate change. By focussing on the last glacial-interglacial cycle, this study shows that palaeo-productivity was increased during the last glacial. This was likely driven by the fertilisation effect of an increased input of aeolian dust and locally intensified upwelling. After the Younger Dryas cold event, the input of aeolian dust and productivity significantly decreased concurrent with an increase in water temperatures in the GoC. This primarily resulted in reduced food availability and caused a widespread demise of the formerly thriving coral ecosystems. Moreover, these climate induced changes most likely caused a latitudinal shift of areas withoptimum coral growth conditions towards the northern NE Atlantic where more suitable environmental conditions established with the onset of the Holocene.
    Keywords: 64PE229; Age, relative; Age, standard deviation; Belgica area off Morocco; Center for Marine Environmental Sciences; Comment of event; Coral; DEPTH, sediment/rock; Event label; Faro/Almazan mud volcano; GAP; GC; GC25; GC27; GC35; GC36; GC44; GeoB9018-1; GeoB9031-1; GeoB9032-1; GeoB9070-1; Gravity corer; Gulf of Cádiz, Atlantic Ocean; HERMIONE; Hesperides mud volcano; Hotspot Ecosystem Research and Mans Impact On European Seas; Latitude of event; Longitude of event; M2004-02_PC; Maria S. Merian; MARUM; Moundforce 2004; MSM01/3; MSM01/3_254; MSM01/3_257; MSM01/3_292; MSM01/3_293; MSM01/3_325; PC; Pelagia; Piston corer; SO175; Sonne; Thorium-232; Thorium-232, standard deviation; Uranium-238; Uranium-238, standard deviation; δ234 Uranium; δ234 Uranium, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 356 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    Process length variation of the cyst of the dinoflagellateProtoceratium reticulatumin the North Pacific and Baltic-Skagerrak region: calibration as an annual density proxy and first evidence of pseudo-cryptic speciation (2012)
    Wiley-Blackwell
    In:  Journal of Quaternary Science, 27 (7). pp. 734-744.
    Details
    Publication Date: 2017-11-14
    Description: Process length variation of cysts of the dinoflagellate Protoceratium reticulatum (Claparède et Lachmann) Bütschli in surface sediments from the North Pacific was investigated. The average process length showed a significant inverse relation to annual seawater density: σt annual = −0.8674 × average process length + 1029.3 (R2 = 0.84), with a standard error of 0.78 kg m−3. A sediment trap study from Effingham Inlet in British Columbia revealed the same relationship between average process length and local seawater density variations. In the Baltic–Skagerrak region, the average process length variation was related significantly to annual seawater density: σt annual = 3.5457 × average process length − 993.28 (R2 = 0.86), with a standard error of 3.09 kg m−3. These calibrations cannot be reconciled, which accentuates the regional character of the calibrations. This can be related to variations in molecular data (small subunit, long subunit and internal transcribed spacer sequences), which show the presence of several genotypes and the occurrence of pseudo-cryptic speciation within this species.
    Type: Article , PeerReviewed
    Format: text
    DOI: 10.1002/jqs.2564
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    OceanRep: Article in a Scientific Journal - peer-reviewed
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