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  • 1
    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
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  • 2
    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
    Location Call Number Limitation Availability
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  • 3
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    PANGAEA
    In:  Supplement to: Pospelova, Vera; Pedersen, Thomas F; de Vernal, Anne (2006): Dinoflagellate cysts as indicators of climatic and oceanographic changes during the past 40 kyr in the Santa Barbara Basin, southern California. Paleoceanography, 21(2), PA2010, https://doi.org/10.1029/2005PA001251
    Publication Date: 2024-01-09
    Description: The dinoflagellate cyst record from Ocean Drilling Program Hole 893A, Santa Barbara Basin, southern California, is examined at millennial-scale resolution for the past 40 kyr. Changes in cyst abundance, composition of cyst assemblages, and their diversity reflect major shifts in climate and ocean circulation in the region over this time interval. Throughout the sequence, dinoflagellate cyst assemblages are dominated by heterotrophic dinoflagellates. Brigantedinium spp. and other upwelling-related taxa such as Echinidinium and Protoperidinium americanum are abundant, indicating the continued influence of coastal upwelling on the basin during the late Quaternary. A significant increase in cyst accumulation rates is seen during the Holocene and, to a lesser extent, during shorter warming events such as Bolling/Allerod and Dansgaard-Oeschger interstadials, implying enhanced marine productivity during these periods. Cyst diversity is high during the Holocene. An increase in abundance of cysts produced by autotrophic dinoflagellates in the late Holocene suggests enhanced input of warm, nutrient-rich waters. In contrast, cyst assemblages from the Last Glacial Maximum exhibit a relatively low diversity and an increase in the cysts of heterotrophic dinoflagellates, in particular Selenopemphix nephroides. The presence of this taxon in association with Brigantedinium spp. implies substantial cooling of surface waters in the Santa Barbara Basin at that time.
    Keywords: 146-893A; AGE; Alexandrium tamarense, flux; Brigantedinium sp., flux; Counting, dinoflagellate cysts; DEPTH, sediment/rock; Dinoflagellate autotrophic, flux; Dinoflagellates, heterotrophic, flux; Dinoflagellate total, flux; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Dubridinium sp., flux; Echinidinium aculeatum, flux; Echinidinium sp., flux; Foraminiferal organic linings, flux; Halodinium sp., flux; Heterosigma akashiwo, flux; Hexasterias problematica, flux; Impagidinium aculeatum, flux; Impagidinium pallidum, flux; Impagidinium paradoxum, flux; Impagidinium sp., flux; Islandinium brevispinosum, flux; Islandinium cezare, flux; Islandinium minutum, flux; Joides Resolution; Leg146; Lejeunecysta oliva, flux; Lingulodinium machaerophorum, flux; Mandibles, flux; Nematosphaeropsis labyrinthus, flux; North Pacific Ocean; Ocean Drilling Program; ODP; Operculodinium centrocarpum, flux; Pediastrum sp., flux; Pentapharsodinium dalei, flux; Pollen, flux; pollen analytical standard techniques (Faegri & Iversen, 1989, Textbook Pollen); Polykrikos kofoidii, flux; Polykrikos schwarzii, flux; Protoperidinium americanum, flux; Pyxidinopsis reticulata, flux; Quinquecuspis concreta, flux; Radiosperma corbiferum, flux; Sample code/label; Selenopemphix nephroides, flux; Selenopemphix quanta, flux; Spiniferites bulloideus, flux; Spiniferites membranaceus, flux; Spiniferites mirabilis, flux; Spiniferites ramosus, flux; Spiniferites sp., flux; Tectatodinium pellitum, flux; Trinovantedinium applanatum, flux; Trinovantedinium variabile, flux; Undetermined taxa, flux; Votadinium calvum, flux; Votadinium spinosum, flux
    Type: Dataset
    Format: text/tab-separated-values, 2302 data points
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  • 4
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    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
    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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  • 5
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    Unknown
    PANGAEA
    In:  Supplement to: Mertens, Kenneth Neil; Verhoeven, Koen; Verleye, Thomas; Louwye, Stephen; Amorim, Ana; Ribeiro, Sofia; Deaf, Amr S; Harding, Ian C; De Schepper, Stijn; González, Catalina; Kodrans-Nsiah, Monika; de Vernal, Anne; Henry, Maryse; Radi, Taoufik; Dybkjaer, Karen; Poulsen, Niels E; Feist-Burkhardt, Susanne; Chitolie, Jonah; Heilmann-Clausen, Claus; Londeix, Laurent; Turon, Jean-Louis; Marret, Fabienne; Matthiessen, Jens; McCarthy, Francine M G; Prasad, Vandana; Pospelova, Vera; Hughes, Jane E Kyffin; Riding, James B; Rochon, André; Sangiorgi, Francesca; Welters, Natasja; Sinclair, Natalie; Thun, Christian; Soliman, Ali; Van Nieuwenhove, Nicolas; Vink, Annemiek; Young, Martin (2009): Determining the absolute abundance of dinoflagellate cysts in recent marine sediments: The Lycopodium marker-grain method put to the test. Review of Palaeobotany and Palynology, Review of Palaeobotany and Palynology, 157(3-4), 238-252, https://doi.org/10.1016/j.revpalbo.2009.05.004
    Publication Date: 2024-02-02
    Description: Absolute abundances (concentrations) of dinoflagellate cysts are often determined through the addition of Lycopodium clavatum marker-grains as a spike to a sample before palynological processing. An inter-laboratory calibration exercise was set up in order to test the comparability of results obtained in different laboratories, each using its own preparation method. Each of the 23 laboratories received the same amount of homogenized splits of four Quaternary sediment samples. The samples originate from different localities and consisted of a variety of lithologies. Dinoflagellate cysts were extracted and counted, and relative and absolute abundances were calculated. The relative abundances proved to be fairly reproducible, notwithstanding a need for taxonomic calibration. By contrast, excessive loss of Lycopodium spores during sample preparation resulted in non-reproducibility of absolute abundances. Use of oxidation, KOH, warm acids, acetolysis, mesh sizes larger than 15 µm and long ultrasonication (〉 1 min) must be avoided to determine reproducible absolute abundances. The results of this work therefore indicate that the dinoflagellate cyst worker should make a choice between using the proposed standard method which circumvents critical steps, adding Lycopodium tablets at the end of the preparation and using an alternative method.
    Keywords: Benguela; Celtic_Sea; Center for Marine Environmental Sciences; GeoB; Geosciences, University of Bremen; MARUM; MUC; MultiCorer; North_Sea; North Sea; NW_Africa
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 6
    Publication Date: 2024-02-21
    Description: Data set of dinocyst assemblages (% of 71 taxa) and corresponding location and sea-surface parameters.
    Keywords: Achomosphaera andalousiensis; Arctic; Ataxiodinium choane; Atlanticodinium striaticonulum; Bitectatodinium spongium; Bitectatodinium tepikiense; Brigantedinium spp.; Dalella chathamensis; Depth, bathymetric; Dinocysts; Distance; Dubridinium spp.; Echinidinium aculeatum; Echinidinium delicatum; Echinidinium granulatum; Echinidinium karaense; Echinidinium spp.; Echinidinium transparantum; Gymnodinium sp. cyst; Impagidinium aculeatum; Impagidinium japonicum; Impagidinium pallidum; Impagidinium paradoxum; Impagidinium patulum; Impagidinium plicatum; Impagidinium sphaericum; Impagidinium strialatum; Impagidinium velorum; Islandinium? cezare; Islandinium brevispinosum; Islandinium minutum; LATITUDE; Lejeunecysta spp.; Lingulodinium machaerophorum; LONGITUDE; Melitasphaeridium choanophorum; Nematosphaeropsis labyrinthus; Nematosphaeropsis rigida; Net primary production of carbon; Nitrate; North Atlantic; North Pacific; Operculodinium centrocarpum sensu Wall and Dale (1966); Operculodinium giganteum; Operculodinium israelianum; Operculodinium longispinigerum; Oxygen; Oxygen, dissolved; Pentapharsodinium dalei cyst; Phosphate; Polykrikos kofoidii cyst; Polykrikos schwartzii cyst; Polykrikos var. arctica cyst; Polysphaeridium zoharyi; Primary production of carbon per area, yearly; productivity; Protoperidinioid cyst; Protoperidinium americanum cyst; Protoperidinium fukuyoi cyst; Protoperidinium nudum cyst; Protoperidinium stellatum cyst; Pyxidinopsis reticulata; Quinquecuspis concreta; Recalculated from ml/l by using (ml/l)*44.66; Sample code/label; Scrippsiella trifida cyst; sea-ice; Sea ice concentration; Sea ice cover duration; sea-surface salinity; sea-surface temperature; Selenopemphix nephroides; Selenopemphix quanta; Silicate; Spiniferites belerius; Spiniferites bentori; Spiniferites bulloideus; Spiniferites delicatus; Spiniferites elongatus; Spiniferites lazus; Spiniferites membranaceus; Spiniferites mirabilis-hyperacanthus; Spiniferites pachydermus; Spiniferites ramosus; Spiniferites sp.; Spiniferites spp.; Stelladinium bifurcatum; Surface salinity; Surface sediment; Surface temperature; Tectatodinium pellitum; Trinovantedinium applanatum; Trinovantedinium variabile; Tuberculodinium vancampoae; Votadinium calvum; Votadinium spinosum; Xandarodinium xanthum
    Type: Dataset
    Format: text/tab-separated-values, 232224 data points
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  • 7
    Publication Date: 2024-02-02
    Keywords: Celtic_Sea; Center for Marine Environmental Sciences; GeoB; Geosciences, University of Bremen; Laboratory; Lycopodium marker-grain method; MARUM; MUC; MultiCorer; Species
    Type: Dataset
    Format: text/tab-separated-values, 2754 data points
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  • 8
    Publication Date: 2024-02-02
    Keywords: Center for Marine Environmental Sciences; GeoB; Geosciences, University of Bremen; Laboratory; Lycopodium marker-grain method; MARUM; North_Sea; North Sea; see reference(s); Species
    Type: Dataset
    Format: text/tab-separated-values, 1969 data points
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  • 9
    Publication Date: 2024-02-02
    Keywords: Center for Marine Environmental Sciences; GeoB; Geosciences, University of Bremen; Laboratory; Lycopodium marker-grain method; MARUM; MUC; MultiCorer; NW_Africa; Species
    Type: Dataset
    Format: text/tab-separated-values, 2041 data points
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  • 10
    Publication Date: 2024-02-02
    Keywords: Benguela; Center for Marine Environmental Sciences; GeoB; Geosciences, University of Bremen; Laboratory; Lycopodium marker-grain method; MARUM; Species
    Type: Dataset
    Format: text/tab-separated-values, 14353 data points
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