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  • 2010-2014  (4)
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  • 1
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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
  • 2
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    Geographic distribution of dinoflagellate cysts in surface sediments (2013)
    PANGAEA
    Details
    Publication Date: 2023-12-07
    Description: Dinoflagellate cysts are useful for reconstructing upper water conditions. For adequate reconstructions detailed information is required about the relationship between modern day environmental conditions and the geographic distribution of cysts in sediments. This Atlas summarises the modern global distribution of 71 organicwalled dinoflagellate cyst species. The synthesis is based on the integration of literature sources together with data of 2405 globally distributed surface sediment samples that have been preparedwith a comparable methodology and taxonomy. The distribution patterns of individual cyst species are being comparedwith environmental factors that are knownto influence dinoflagellate growth, gamete production, encystment, excystment and preservation of their organic-walled cysts: surface water temperature, salinity, nitrate, phosphate, chlorophyll-a concentrations and bottom water oxygen concentrations. Graphs are provided for every species depicting the relationship between seasonal and annual variations of these parameters and the relative abundance of the species. Results have been compared with previously published records; an overview of the ecological significance as well as information about the seasonal production of each individual species is presented. The relationship between the cyst distribution and variation in the aforementioned environmental parameters was analysed by performing a canonical correspondence analysis. All tested variables showed a positive relationship on the 99% confidence level. Sea-surface temperature represents the parameter corresponding to the largest amount of variance within the dataset (40%) followed by nitrate, salinity, phosphate and bottom-water oxygen concentration, which correspond to 34%, 33%, 25% and 24% of the variance, respectively. Characterisations of selected environments as well as a discussion about how these factors could have influenced the final cyst yield in sediments are included.
    Keywords: Alexandrium tamarense; Ataxiodinium choane; Bitectatodinium spongium; Bitectatodinium tepikiense; Brigantedinium spp.; Calculated; Caspidinium rugosum; Center for Marine Environmental Sciences; Chlorophyll a, interpolated; Cryodinium meridianum; Dalella chathamensis; DEPTH, sediment/rock; Dinoflagellate cyst; Dinoflagellate cyst, reworked; Dissolved oxygen, in water, interpolated; Dubridinium caperatum; Echinidinium aculeatum; Echinidinium bispiniformum; Echinidinium delicatum; Echinidinium granulatum; Echinidinium karaense; Echinidinium spp.; Echinidinium transparantum; Glaphyrocysta semitecta; Gymnodinium catenatum; Gymnodinium nolleri; Impagidinium aculeatum; Impagidinium caspienense; Impagidinium pallidum; Impagidinium paradoxum; Impagidinium patulum; Impagidinium plicatum; Impagidinium sphaericum; Impagidinium strialatum; Impagidinium variaseptum; Impagidinium velorum; Islandinium cezare; Islandinium minutum; LATITUDE; Lejeunecysta oliva; Lejeunecysta sabrina; Lingulodinium machaerophorum; LONGITUDE; MARUM; Nematosphaeropsis labyrinthus; Nitrate, in water, interpolated; Operculodinium centrocarpum; Operculodinium israelianum; Operculodinium janduchenei; Operculodinium longispinigerum; Operculodinium spp.; Pentapharsodinium dalei; Peridinium ponticum; Phosphate, in water, interpolated; Polykrikos kofoidii; Polykrikos schwarzii; Polykrikos var. arctica; Polysphaeridium zoharyi; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; Protoperidiniaceae; Protoperidinium americanum; Protoperidinium monospinum; Pyxidinopsis psilata; Pyxidinopsis reticulata; Quinquecuspis concreta; Reference/source; Selenopemphix antarctica; Selenopemphix nephroides; Selenopemphix quanta; Spiniferites bentori; Spiniferites cruciformis; Spiniferites delicatus; Spiniferites elongatus; Spiniferites lazus; Spiniferites membranaceus; Spiniferites mirabilis; Spiniferites pachydermus; Spiniferites ramosus; Spiniferites spp.; SPP1158; Station label; Stelladinium robustum; Stelladinium stellatum; Tectatodinium pellitum; Temperature, annular; Temperature, autumn; Temperature, spring; Temperature, summer; Temperature, winter; Trinovantedinium applanatum; Tuberculodinium vancampoae; Uniform resource locator/link to file; Votadinium calvum; Votadinium spinosum; Xandarodinium xanthum
    Type: Dataset
    Format: text/tab-separated-values, 230152 data points
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    DATA PANGAEA
  • 3
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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
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    DATA PANGAEA
  • 4
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    Atlas of modern dinoflagellate cyst distribution based on 2405 data points (2013)
    In:  EPIC3Review of Palaeobotany and Palynology, 191, pp. 1-197, ISSN: 00346667
    Details
    Publication Date: 2019-07-17
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , isiRev
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    PAPER (OA)
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