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
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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Online Access: | https://epic.awi.de/id/eprint/25726/ http://www.sciencedirect.com/science/article/pii/S0377839811001228 https://hdl.handle.net/10013/epic.39049 |
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ftawi:oai:epic.awi.de:25726 2023-05-15T13:24:42+02:00 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 Bonnet, Sophie de Vernal, Anne Gersonde, Rainer Lembke-Jene, Lester 2012 https://epic.awi.de/id/eprint/25726/ http://www.sciencedirect.com/science/article/pii/S0377839811001228 https://hdl.handle.net/10013/epic.39049 unknown ELSEVIER SCIENCE BV Bonnet, S. , de Vernal, A. , Gersonde, R. and Lembke-Jene, L. orcid:0000-0002-6873-8533 (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 , pp. 87-113 . doi:10.1016/j.marmicro.2011.11.006 <https://doi.org/10.1016/j.marmicro.2011.11.006> , hdl:10013/epic.39049 EPIC3Marine Micropaleontology, ELSEVIER SCIENCE BV, 84-85, pp. 87-113, ISSN: 0377-8398 Article isiRev 2012 ftawi https://doi.org/10.1016/j.marmicro.2011.11.006 2021-12-24T15:35:30Z 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 143 816 cysts/cm3 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 Brigantedinium spp. and 5) the Kuroshio Extension-North Pacific-Subarctic Current zone characterized by a subtropical and oligotrophic environment, which is dominated by O. centrocarpum, N. labyrinthus and warm taxa of the genus Impagidinium. Transfer functions were tested using the modern analog technique (MAT) on the North Pacific Ocean (= 359 sites) and the entire Northern Hemisphere databases (= 1419 sites). Results confirm that the updated Northern Hemisphere database is suitable for further paleoenvironmental reconstructions, and the best results are obtained for temperatures with an accuracy of ± 1.7 °C. Article in Journal/Newspaper Anadyr Anadyr' Bering Sea Kamchatka okhotsk sea Sea ice Subarctic Alaska Yukon Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) 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) Marine Micropaleontology 84-85 87 113 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
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 143 816 cysts/cm3 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 Brigantedinium spp. and 5) the Kuroshio Extension-North Pacific-Subarctic Current zone characterized by a subtropical and oligotrophic environment, which is dominated by O. centrocarpum, N. labyrinthus and warm taxa of the genus Impagidinium. Transfer functions were tested using the modern analog technique (MAT) on the North Pacific Ocean (= 359 sites) and the entire Northern Hemisphere databases (= 1419 sites). Results confirm that the updated Northern Hemisphere database is suitable for further paleoenvironmental reconstructions, and the best results are obtained for temperatures with an accuracy of ± 1.7 °C. |
format |
Article in Journal/Newspaper |
author |
Bonnet, Sophie de Vernal, Anne Gersonde, Rainer Lembke-Jene, Lester |
spellingShingle |
Bonnet, Sophie de Vernal, Anne Gersonde, Rainer Lembke-Jene, Lester 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 |
author_facet |
Bonnet, Sophie de Vernal, Anne Gersonde, Rainer Lembke-Jene, Lester |
author_sort |
Bonnet, Sophie |
title |
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 |
title_short |
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 |
title_full |
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 |
title_fullStr |
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 |
title_full_unstemmed |
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 |
title_sort |
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 |
publisher |
ELSEVIER SCIENCE BV |
publishDate |
2012 |
url |
https://epic.awi.de/id/eprint/25726/ http://www.sciencedirect.com/science/article/pii/S0377839811001228 https://hdl.handle.net/10013/epic.39049 |
long_lat |
ENVELOPE(177.510,177.510,64.734,64.734) ENVELOPE(176.233,176.233,64.882,64.882) |
geographic |
Yukon Bering Sea Okhotsk Pacific Anadyr Anadyr’ |
geographic_facet |
Yukon Bering Sea Okhotsk Pacific Anadyr Anadyr’ |
genre |
Anadyr Anadyr' Bering Sea Kamchatka okhotsk sea Sea ice Subarctic Alaska Yukon |
genre_facet |
Anadyr Anadyr' Bering Sea Kamchatka okhotsk sea Sea ice Subarctic Alaska Yukon |
op_source |
EPIC3Marine Micropaleontology, ELSEVIER SCIENCE BV, 84-85, pp. 87-113, ISSN: 0377-8398 |
op_relation |
Bonnet, S. , de Vernal, A. , Gersonde, R. and Lembke-Jene, L. orcid:0000-0002-6873-8533 (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 , pp. 87-113 . doi:10.1016/j.marmicro.2011.11.006 <https://doi.org/10.1016/j.marmicro.2011.11.006> , hdl:10013/epic.39049 |
op_doi |
https://doi.org/10.1016/j.marmicro.2011.11.006 |
container_title |
Marine Micropaleontology |
container_volume |
84-85 |
container_start_page |
87 |
op_container_end_page |
113 |
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1766380925886660608 |