Comparison study of the modem ostracod associations in the Kara and Laptev seas: Ecological aspects
Recent ostracod assemblages were investigated from coretop sediment samples collected in the eastern Kara Sea from water depths down to 300 m. A total of 45 species were identified, 27 of them were reported for the Kara Sea for the first time. The Kara Sea data were compared with our results on the...
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2007
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Online Access: | http://eprints.esc.cam.ac.uk/711/ http://eprints.esc.cam.ac.uk/711/1/simstitch_marine_micropal2007.pdf https://doi.org/10.1016/j.marmicro.2006.10.003 |
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ftucambridgeesc:oai:eprints.esc.cam.ac.uk:711 2023-05-15T16:59:51+02:00 Comparison study of the modem ostracod associations in the Kara and Laptev seas: Ecological aspects Stepanova, A. Taldenkova, E. Simstich, J. Bauch, H. A. 2007-06 application/pdf http://eprints.esc.cam.ac.uk/711/ http://eprints.esc.cam.ac.uk/711/1/simstitch_marine_micropal2007.pdf https://doi.org/10.1016/j.marmicro.2006.10.003 en eng Elsevier http://eprints.esc.cam.ac.uk/711/1/simstitch_marine_micropal2007.pdf Stepanova, A. and Taldenkova, E. and Simstich, J. and Bauch, H. A. (2007) Comparison study of the modem ostracod associations in the Kara and Laptev seas: Ecological aspects. Marine Micropaleontology, 63 (3-4). pp. 111-142. ISSN 0377-8398 DOI https://doi.org/10.1016/j.marmicro.2006.10.003 <https://doi.org/10.1016/j.marmicro.2006.10.003> Article PeerReviewed 2007 ftucambridgeesc https://doi.org/10.1016/j.marmicro.2006.10.003 2020-08-27T18:08:40Z Recent ostracod assemblages were investigated from coretop sediment samples collected in the eastern Kara Sea from water depths down to 300 m. A total of 45 species were identified, 27 of them were reported for the Kara Sea for the first time. The Kara Sea data were compared with our results on the distribution of ostracods in the eastern Laptev Sea. The spatial distribution of recent taxa and the ecological groupings demonstrate a clear relation to dominant environmental factors which range from estuarine to full-marine conditions. Four assemblages related to average summer bottom water salinities were established: (1) a freshwater assemblage from the inner estuaries of the Ob' and Yenisei rivers with salinities less than 2 and from thermokarst lagoons of the southern Laptev Sea coast with strong salinization in winter; (2) a brackishwater assemblage of the outer estuaries of the Ob' and Yenisei rivers with salinities up to 26; (3) a mixed euryhaline–marine assemblage dominated by euryhaline species Paracyprideis pseudopunctillata and Heterocyprideis sorbyana from the inner shelf river-affected zone of the Kara and Laptev seas, where salinities range between 26 and 32; (4) a taxonomically diverse marine assemblage dominated by shallow-water marine taxa from the northern parts of the Kara and Laptev shelves and upper continental slope with stable bottom environments and a salinity higher than 32. Abundant euryhaline species found at greater water depths are identified as part of an ice-rafted assemblage. They are possibly entrained into the newly formed fast ice during autumn storms and freeze-up period and then transported to the distal open-sea areas during summer. Article in Journal/Newspaper Kara Sea laptev Laptev Sea Thermokarst University of Cambridge, Department of Earth Sciences: ESC Publications Kara Sea Laptev Sea Marine Micropaleontology 63 3-4 111 142 |
institution |
Open Polar |
collection |
University of Cambridge, Department of Earth Sciences: ESC Publications |
op_collection_id |
ftucambridgeesc |
language |
English |
description |
Recent ostracod assemblages were investigated from coretop sediment samples collected in the eastern Kara Sea from water depths down to 300 m. A total of 45 species were identified, 27 of them were reported for the Kara Sea for the first time. The Kara Sea data were compared with our results on the distribution of ostracods in the eastern Laptev Sea. The spatial distribution of recent taxa and the ecological groupings demonstrate a clear relation to dominant environmental factors which range from estuarine to full-marine conditions. Four assemblages related to average summer bottom water salinities were established: (1) a freshwater assemblage from the inner estuaries of the Ob' and Yenisei rivers with salinities less than 2 and from thermokarst lagoons of the southern Laptev Sea coast with strong salinization in winter; (2) a brackishwater assemblage of the outer estuaries of the Ob' and Yenisei rivers with salinities up to 26; (3) a mixed euryhaline–marine assemblage dominated by euryhaline species Paracyprideis pseudopunctillata and Heterocyprideis sorbyana from the inner shelf river-affected zone of the Kara and Laptev seas, where salinities range between 26 and 32; (4) a taxonomically diverse marine assemblage dominated by shallow-water marine taxa from the northern parts of the Kara and Laptev shelves and upper continental slope with stable bottom environments and a salinity higher than 32. Abundant euryhaline species found at greater water depths are identified as part of an ice-rafted assemblage. They are possibly entrained into the newly formed fast ice during autumn storms and freeze-up period and then transported to the distal open-sea areas during summer. |
format |
Article in Journal/Newspaper |
author |
Stepanova, A. Taldenkova, E. Simstich, J. Bauch, H. A. |
spellingShingle |
Stepanova, A. Taldenkova, E. Simstich, J. Bauch, H. A. Comparison study of the modem ostracod associations in the Kara and Laptev seas: Ecological aspects |
author_facet |
Stepanova, A. Taldenkova, E. Simstich, J. Bauch, H. A. |
author_sort |
Stepanova, A. |
title |
Comparison study of the modem ostracod associations in the Kara and Laptev seas: Ecological aspects |
title_short |
Comparison study of the modem ostracod associations in the Kara and Laptev seas: Ecological aspects |
title_full |
Comparison study of the modem ostracod associations in the Kara and Laptev seas: Ecological aspects |
title_fullStr |
Comparison study of the modem ostracod associations in the Kara and Laptev seas: Ecological aspects |
title_full_unstemmed |
Comparison study of the modem ostracod associations in the Kara and Laptev seas: Ecological aspects |
title_sort |
comparison study of the modem ostracod associations in the kara and laptev seas: ecological aspects |
publisher |
Elsevier |
publishDate |
2007 |
url |
http://eprints.esc.cam.ac.uk/711/ http://eprints.esc.cam.ac.uk/711/1/simstitch_marine_micropal2007.pdf https://doi.org/10.1016/j.marmicro.2006.10.003 |
geographic |
Kara Sea Laptev Sea |
geographic_facet |
Kara Sea Laptev Sea |
genre |
Kara Sea laptev Laptev Sea Thermokarst |
genre_facet |
Kara Sea laptev Laptev Sea Thermokarst |
op_relation |
http://eprints.esc.cam.ac.uk/711/1/simstitch_marine_micropal2007.pdf Stepanova, A. and Taldenkova, E. and Simstich, J. and Bauch, H. A. (2007) Comparison study of the modem ostracod associations in the Kara and Laptev seas: Ecological aspects. Marine Micropaleontology, 63 (3-4). pp. 111-142. ISSN 0377-8398 DOI https://doi.org/10.1016/j.marmicro.2006.10.003 <https://doi.org/10.1016/j.marmicro.2006.10.003> |
op_doi |
https://doi.org/10.1016/j.marmicro.2006.10.003 |
container_title |
Marine Micropaleontology |
container_volume |
63 |
container_issue |
3-4 |
container_start_page |
111 |
op_container_end_page |
142 |
_version_ |
1766052364134907904 |