The net phytoplankton in Kongsfjorden, Svalbard, July 1988, with general remarks on species composition of Arctic phytoplankton
Examination of 17 samples collected by a 20 ?m meshed meshed net in Kongsfjorden, Svalbard, 8–19 July 1988, showed a dominance of dinoflagellates and the chrysophyte Dinobryon Balticum in the surface layers, whereas the diatom and the haptophyte Phaecystis pouchetii abundance increased with depth. T...
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Norwegian Polar Institute
1998
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ftjpolarres:oai:journals.openacademia.net:article/2261 2023-05-15T14:01:21+02:00 The net phytoplankton in Kongsfjorden, Svalbard, July 1988, with general remarks on species composition of Arctic phytoplankton Rytter Hasle, Grethe Riddervold Heimdal, Berit 1998-01-06 application/pdf https://polarresearch.net/index.php/polar/article/view/2261 https://doi.org/10.3402/polar.v17i1.6605 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2261/5512 https://polarresearch.net/index.php/polar/article/view/2261 doi:10.3402/polar.v17i1.6605 Copyright (c) 2018 Polar Research Polar Research; Vol. 17 No. 1 (1998); 31-52 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 1998 ftjpolarres https://doi.org/10.3402/polar.v17i1.6605 2021-11-11T19:12:21Z Examination of 17 samples collected by a 20 ?m meshed meshed net in Kongsfjorden, Svalbard, 8–19 July 1988, showed a dominance of dinoflagellates and the chrysophyte Dinobryon Balticum in the surface layers, whereas the diatom and the haptophyte Phaecystis pouchetii abundance increased with depth. The diatom Pseudo-nitzschia granii appeared together with P. pouchetii through the whole water column, and Actinocyclus curvatulus was one of the few diatoms present also in the surface samples. Two samples, from 15 and 50 m, respectively, were cleaned of organic material and mounted in Naphrax for a more critical identification of the diatoms. We were able to group the species according to habitats, especially types of ice. The planktonic Thalassiosira antarctica var. borealis, T. hyalina, T. nordenskioeldii, Bacterosira bathyomphaia, Chaetoceros furcellatus, C. socialis and Fragilariopsis oceanica were present mainly as resting stages representing a post-bloom situation. These species and T. gravida appear early in the season and may have started to grow already under the ice. Fragilariopsis cylindrus and F. oceanica seem to have a closer affinity to ice than Thalassiosira and Chaetoceros spp. although they are common in the plankton. Some Nitzschia species which are usually regarded as typical sea-ice diatoms and have thicker and older ice as the main habitat were present only in small cell numbers in the plankton samples. The last component, evidently introduced from Atlantic water in the Norwegian Sea, consisted of diatoms with a more oceanic distribution, e. g. Fragilariopsis pseudonana and a small form of Thalassiosira bioculata. Article in Journal/Newspaper Antarc* Antarctica Arctic Kongsfjord* Kongsfjorden Norwegian Sea Phytoplankton Polar Research Sea ice Svalbard Polar Research (E-Journal) Arctic Svalbard Norwegian Sea Polar Research 17 1 31 52 |
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Polar Research (E-Journal) |
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English |
description |
Examination of 17 samples collected by a 20 ?m meshed meshed net in Kongsfjorden, Svalbard, 8–19 July 1988, showed a dominance of dinoflagellates and the chrysophyte Dinobryon Balticum in the surface layers, whereas the diatom and the haptophyte Phaecystis pouchetii abundance increased with depth. The diatom Pseudo-nitzschia granii appeared together with P. pouchetii through the whole water column, and Actinocyclus curvatulus was one of the few diatoms present also in the surface samples. Two samples, from 15 and 50 m, respectively, were cleaned of organic material and mounted in Naphrax for a more critical identification of the diatoms. We were able to group the species according to habitats, especially types of ice. The planktonic Thalassiosira antarctica var. borealis, T. hyalina, T. nordenskioeldii, Bacterosira bathyomphaia, Chaetoceros furcellatus, C. socialis and Fragilariopsis oceanica were present mainly as resting stages representing a post-bloom situation. These species and T. gravida appear early in the season and may have started to grow already under the ice. Fragilariopsis cylindrus and F. oceanica seem to have a closer affinity to ice than Thalassiosira and Chaetoceros spp. although they are common in the plankton. Some Nitzschia species which are usually regarded as typical sea-ice diatoms and have thicker and older ice as the main habitat were present only in small cell numbers in the plankton samples. The last component, evidently introduced from Atlantic water in the Norwegian Sea, consisted of diatoms with a more oceanic distribution, e. g. Fragilariopsis pseudonana and a small form of Thalassiosira bioculata. |
format |
Article in Journal/Newspaper |
author |
Rytter Hasle, Grethe Riddervold Heimdal, Berit |
spellingShingle |
Rytter Hasle, Grethe Riddervold Heimdal, Berit The net phytoplankton in Kongsfjorden, Svalbard, July 1988, with general remarks on species composition of Arctic phytoplankton |
author_facet |
Rytter Hasle, Grethe Riddervold Heimdal, Berit |
author_sort |
Rytter Hasle, Grethe |
title |
The net phytoplankton in Kongsfjorden, Svalbard, July 1988, with general remarks on species composition of Arctic phytoplankton |
title_short |
The net phytoplankton in Kongsfjorden, Svalbard, July 1988, with general remarks on species composition of Arctic phytoplankton |
title_full |
The net phytoplankton in Kongsfjorden, Svalbard, July 1988, with general remarks on species composition of Arctic phytoplankton |
title_fullStr |
The net phytoplankton in Kongsfjorden, Svalbard, July 1988, with general remarks on species composition of Arctic phytoplankton |
title_full_unstemmed |
The net phytoplankton in Kongsfjorden, Svalbard, July 1988, with general remarks on species composition of Arctic phytoplankton |
title_sort |
net phytoplankton in kongsfjorden, svalbard, july 1988, with general remarks on species composition of arctic phytoplankton |
publisher |
Norwegian Polar Institute |
publishDate |
1998 |
url |
https://polarresearch.net/index.php/polar/article/view/2261 https://doi.org/10.3402/polar.v17i1.6605 |
geographic |
Arctic Svalbard Norwegian Sea |
geographic_facet |
Arctic Svalbard Norwegian Sea |
genre |
Antarc* Antarctica Arctic Kongsfjord* Kongsfjorden Norwegian Sea Phytoplankton Polar Research Sea ice Svalbard |
genre_facet |
Antarc* Antarctica Arctic Kongsfjord* Kongsfjorden Norwegian Sea Phytoplankton Polar Research Sea ice Svalbard |
op_source |
Polar Research; Vol. 17 No. 1 (1998); 31-52 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2261/5512 https://polarresearch.net/index.php/polar/article/view/2261 doi:10.3402/polar.v17i1.6605 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v17i1.6605 |
container_title |
Polar Research |
container_volume |
17 |
container_issue |
1 |
container_start_page |
31 |
op_container_end_page |
52 |
_version_ |
1766271081557000192 |