Palynology and dinoflagellate counts of surface sediments, and sea surface conditions, of sites in the North Pacific
Palynological analyses were performed on 53 surface sediment samples from the North Pacific Ocean, including the Bering and Okhotsk Seas (37-64°N, 144°E-148°W), in order to document the relationships between the dinocyst distribution and sea-surface conditions (temperatures, salinities, primary prod...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.807216 2023-05-15T13:24:41+02:00 Palynology and dinoflagellate counts of surface sediments, and sea surface conditions, of sites in the North Pacific Bonnet, Sophie de Vernal, Anne Gersonde, Rainer Lembke-Jene, Lester MEDIAN LATITUDE: 51.719225 * MEDIAN LONGITUDE: 173.060016 * SOUTH-BOUND LATITUDE: 37.767500 * WEST-BOUND LONGITUDE: 144.793767 * NORTH-BOUND LATITUDE: 63.030000 * EAST-BOUND LONGITUDE: -148.884300 * DATE/TIME START: 1998-08-12T13:45:00 * DATE/TIME END: 2009-08-23T09:56:00 2012-02-13 application/zip, 4 datasets https://doi.pangaea.de/10.1594/PANGAEA.807216 https://doi.org/10.1594/PANGAEA.807216 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.807216 https://doi.org/10.1594/PANGAEA.807216 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Bonnet, Sophie; de Vernal, Anne; Gersonde, Rainer; Lembke-Jene, Lester (2012): Modern distribution of dinocysts from the North Pacific Ocean (37-64°N, 144°E-148°W) in relation to hydrographic conditions, sea-ice and productivity. Marine Micropaleontology, 84-85, 87-113, https://doi.org/10.1016/j.marmicro.2011.11.006 International Polar Year (2007-2008) IPY Dataset 2012 ftpangaea https://doi.org/10.1594/PANGAEA.807216 https://doi.org/10.1016/j.marmicro.2011.11.006 2023-01-20T07:32:54Z Palynological analyses were performed on 53 surface sediment samples from the North Pacific Ocean, including the Bering and Okhotsk Seas (37-64°N, 144°E-148°W), in order to document the relationships between the dinocyst distribution and sea-surface conditions (temperatures, salinities, primary productivity and sea-ice cover). Samples are characterized by concentrations ranging from 18 to 143816 cysts/cm**3 and the occurrence of 32 species. A canonical correspondence analysis (CCA) was carried out to determine the relationship between environmental variables and the distribution of dinocyst taxa. The first and second axes represent, respectively, 47% and 17.8% of the canonical variance. Axis 1 is positively correlated with all parameters except to the sea-ice and primary productivity in August, which are on the negative side. Results indicate that the composition of dinocyst assemblages is mostly controlled by temperature and that all environmental variables are correlated together. The CCA distinguishes 3 groups of dinocysts: the heterotrophic taxa, the genera Impagidinium and Spiniferites as well as the cyst of Pentapharsodinium dalei and Operculodinium centrocarpum. Five assemblage zones can be distinguished: 1) the Okhotsk Sea zone, which is associated to temperate and eutrophic conditions, seasonal upwellings and Amur River discharges. It is characterized by the dominance of O. centrocarpum, Brigantedinium spp. and Islandinium minutum; 2) the Western Subarctic Gyre zone with subpolar and mesotrophic conditions due to the Kamchatka Current and Alaska Stream inflows. Assemblages are dominated by Nematosphaeropsis labyrinthus, Pyxidinopsis reticulata and Brigantedinium spp.; 3) the Bering Sea zone, depicting a subpolar environment, influenced by seasonal upwellings and inputs from the Anadyr and Yukon Rivers. It is characterized by the dominance of I. minutum and Brigantedinium spp.; 4) the Alaska Gyre zone with temperate conditions and nutrient-enriched surface waters, which is dominated by N. labyrinthus and ... Dataset Anadyr Anadyr' Bering Sea International Polar Year IPY Kamchatka okhotsk sea Sea ice Subarctic Alaska Yukon PANGAEA - Data Publisher for Earth & Environmental Science Yukon Bering Sea Okhotsk Pacific Anadyr ENVELOPE(177.510,177.510,64.734,64.734) Anadyr’ ENVELOPE(176.233,176.233,64.882,64.882) ENVELOPE(144.793767,-148.884300,63.030000,37.767500) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
International Polar Year (2007-2008) IPY |
spellingShingle |
International Polar Year (2007-2008) IPY Bonnet, Sophie de Vernal, Anne Gersonde, Rainer Lembke-Jene, Lester Palynology and dinoflagellate counts of surface sediments, and sea surface conditions, of sites in the North Pacific |
topic_facet |
International Polar Year (2007-2008) IPY |
description |
Palynological analyses were performed on 53 surface sediment samples from the North Pacific Ocean, including the Bering and Okhotsk Seas (37-64°N, 144°E-148°W), in order to document the relationships between the dinocyst distribution and sea-surface conditions (temperatures, salinities, primary productivity and sea-ice cover). Samples are characterized by concentrations ranging from 18 to 143816 cysts/cm**3 and the occurrence of 32 species. A canonical correspondence analysis (CCA) was carried out to determine the relationship between environmental variables and the distribution of dinocyst taxa. The first and second axes represent, respectively, 47% and 17.8% of the canonical variance. Axis 1 is positively correlated with all parameters except to the sea-ice and primary productivity in August, which are on the negative side. Results indicate that the composition of dinocyst assemblages is mostly controlled by temperature and that all environmental variables are correlated together. The CCA distinguishes 3 groups of dinocysts: the heterotrophic taxa, the genera Impagidinium and Spiniferites as well as the cyst of Pentapharsodinium dalei and Operculodinium centrocarpum. Five assemblage zones can be distinguished: 1) the Okhotsk Sea zone, which is associated to temperate and eutrophic conditions, seasonal upwellings and Amur River discharges. It is characterized by the dominance of O. centrocarpum, Brigantedinium spp. and Islandinium minutum; 2) the Western Subarctic Gyre zone with subpolar and mesotrophic conditions due to the Kamchatka Current and Alaska Stream inflows. Assemblages are dominated by Nematosphaeropsis labyrinthus, Pyxidinopsis reticulata and Brigantedinium spp.; 3) the Bering Sea zone, depicting a subpolar environment, influenced by seasonal upwellings and inputs from the Anadyr and Yukon Rivers. It is characterized by the dominance of I. minutum and Brigantedinium spp.; 4) the Alaska Gyre zone with temperate conditions and nutrient-enriched surface waters, which is dominated by N. labyrinthus and ... |
format |
Dataset |
author |
Bonnet, Sophie de Vernal, Anne Gersonde, Rainer Lembke-Jene, Lester |
author_facet |
Bonnet, Sophie de Vernal, Anne Gersonde, Rainer Lembke-Jene, Lester |
author_sort |
Bonnet, Sophie |
title |
Palynology and dinoflagellate counts of surface sediments, and sea surface conditions, of sites in the North Pacific |
title_short |
Palynology and dinoflagellate counts of surface sediments, and sea surface conditions, of sites in the North Pacific |
title_full |
Palynology and dinoflagellate counts of surface sediments, and sea surface conditions, of sites in the North Pacific |
title_fullStr |
Palynology and dinoflagellate counts of surface sediments, and sea surface conditions, of sites in the North Pacific |
title_full_unstemmed |
Palynology and dinoflagellate counts of surface sediments, and sea surface conditions, of sites in the North Pacific |
title_sort |
palynology and dinoflagellate counts of surface sediments, and sea surface conditions, of sites in the north pacific |
publisher |
PANGAEA |
publishDate |
2012 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.807216 https://doi.org/10.1594/PANGAEA.807216 |
op_coverage |
MEDIAN LATITUDE: 51.719225 * MEDIAN LONGITUDE: 173.060016 * SOUTH-BOUND LATITUDE: 37.767500 * WEST-BOUND LONGITUDE: 144.793767 * NORTH-BOUND LATITUDE: 63.030000 * EAST-BOUND LONGITUDE: -148.884300 * DATE/TIME START: 1998-08-12T13:45:00 * DATE/TIME END: 2009-08-23T09:56:00 |
long_lat |
ENVELOPE(177.510,177.510,64.734,64.734) ENVELOPE(176.233,176.233,64.882,64.882) ENVELOPE(144.793767,-148.884300,63.030000,37.767500) |
geographic |
Yukon Bering Sea Okhotsk Pacific Anadyr Anadyr’ |
geographic_facet |
Yukon Bering Sea Okhotsk Pacific Anadyr Anadyr’ |
genre |
Anadyr Anadyr' Bering Sea International Polar Year IPY Kamchatka okhotsk sea Sea ice Subarctic Alaska Yukon |
genre_facet |
Anadyr Anadyr' Bering Sea International Polar Year IPY Kamchatka okhotsk sea Sea ice Subarctic Alaska Yukon |
op_source |
Supplement to: Bonnet, Sophie; de Vernal, Anne; Gersonde, Rainer; Lembke-Jene, Lester (2012): Modern distribution of dinocysts from the North Pacific Ocean (37-64°N, 144°E-148°W) in relation to hydrographic conditions, sea-ice and productivity. Marine Micropaleontology, 84-85, 87-113, https://doi.org/10.1016/j.marmicro.2011.11.006 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.807216 https://doi.org/10.1594/PANGAEA.807216 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.807216 https://doi.org/10.1016/j.marmicro.2011.11.006 |
_version_ |
1766380864625704960 |