Microbial processes in a high-latitude fjord (Kongsfjorden, Svalbard) : II. Ciliates and dinoflagellates
This paper is part of Lena Seuthe's doctoral thesis, which is available in Munin at http://hdl.handle.net/10037/3777 The composition and ecological role of ciliates and dinoflagellates were investigated at one station in Kongsfjorden, Svalbard, during six consecutive field campaigns between Mar...
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2011
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ftunivtroemsoe:oai:munin.uit.no:10037/3778 2023-05-15T15:00:50+02:00 Microbial processes in a high-latitude fjord (Kongsfjorden, Svalbard) : II. Ciliates and dinoflagellates Seuthe, Lena Iversen, Kriss Wenche Rokkan Narcy, Fanny 2011 https://hdl.handle.net/10037/3778 https://doi.org/10.1007/s00300-010-0930-9 eng eng Springer Verlag Polar Biology 34(2011) nr. 5 s. 751-766 FRIDAID 837211 doi:10.1007/s00300-010-0930-9 0722-4060 https://hdl.handle.net/10037/3778 URN:NBN:no-uit_munin_3489 openAccess VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 Microzooplankton Mesozooplankton Phytoplankton Food web Carbon cycling Arctic Journal article Tidsskriftartikkel Peer reviewed 2011 ftunivtroemsoe https://doi.org/10.1007/s00300-010-0930-9 2021-06-25T17:53:09Z This paper is part of Lena Seuthe's doctoral thesis, which is available in Munin at http://hdl.handle.net/10037/3777 The composition and ecological role of ciliates and dinoflagellates were investigated at one station in Kongsfjorden, Svalbard, during six consecutive field campaigns between March and December 2006. Total ciliate and dinoflagellate abundance mirrored the seasonal progression of phytoplankton, peaking with 5.8 9 104 cells l-1 in April at an average chlorophyll a concentration of 10 lg l-1. Dinoflagellates were more abundant than ciliates, dominated by small athecates. Among ciliates, aloricate oligotrichs dominated the assemblage. A large fraction ([60%) of ciliates and dinoflagellates contained chloroplasts in spring and summer. The biomass of the purely heterotrophic fraction of the ciliate and dinoflagellate community (protozooplankton) was with 14 lg C l-1 highest in conjunction with the phytoplankton spring bloom in April. Growth experiments revealed similar specific growth rates for heterotrophic ciliates and dinoflagellates (\0–0.8 d-1). Food availability may have controlled the protozooplankton assemblage in winter, while copepods may have exerted a strong control during the post-bloom period. Calculations of the potential grazing rates of the protozooplankton indicated its ability to control or heavily impact the phytoplankton stocks at most times. The results show that ciliates and dinoflagellates were an important component of the pelagic food web in Kongsfjorden and need to be taken into account when discussing the fate of phytoplankton and biogeochemical cycling in Arctic marine ecosystems. Article in Journal/Newspaper Arctic Kongsfjord* Kongsfjorden Phytoplankton Polar Biology Svalbard Copepods University of Tromsø: Munin Open Research Archive Arctic Svalbard Polar Biology 34 5 751 766 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 Microzooplankton Mesozooplankton Phytoplankton Food web Carbon cycling Arctic |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 Microzooplankton Mesozooplankton Phytoplankton Food web Carbon cycling Arctic Seuthe, Lena Iversen, Kriss Wenche Rokkan Narcy, Fanny Microbial processes in a high-latitude fjord (Kongsfjorden, Svalbard) : II. Ciliates and dinoflagellates |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 Microzooplankton Mesozooplankton Phytoplankton Food web Carbon cycling Arctic |
description |
This paper is part of Lena Seuthe's doctoral thesis, which is available in Munin at http://hdl.handle.net/10037/3777 The composition and ecological role of ciliates and dinoflagellates were investigated at one station in Kongsfjorden, Svalbard, during six consecutive field campaigns between March and December 2006. Total ciliate and dinoflagellate abundance mirrored the seasonal progression of phytoplankton, peaking with 5.8 9 104 cells l-1 in April at an average chlorophyll a concentration of 10 lg l-1. Dinoflagellates were more abundant than ciliates, dominated by small athecates. Among ciliates, aloricate oligotrichs dominated the assemblage. A large fraction ([60%) of ciliates and dinoflagellates contained chloroplasts in spring and summer. The biomass of the purely heterotrophic fraction of the ciliate and dinoflagellate community (protozooplankton) was with 14 lg C l-1 highest in conjunction with the phytoplankton spring bloom in April. Growth experiments revealed similar specific growth rates for heterotrophic ciliates and dinoflagellates (\0–0.8 d-1). Food availability may have controlled the protozooplankton assemblage in winter, while copepods may have exerted a strong control during the post-bloom period. Calculations of the potential grazing rates of the protozooplankton indicated its ability to control or heavily impact the phytoplankton stocks at most times. The results show that ciliates and dinoflagellates were an important component of the pelagic food web in Kongsfjorden and need to be taken into account when discussing the fate of phytoplankton and biogeochemical cycling in Arctic marine ecosystems. |
format |
Article in Journal/Newspaper |
author |
Seuthe, Lena Iversen, Kriss Wenche Rokkan Narcy, Fanny |
author_facet |
Seuthe, Lena Iversen, Kriss Wenche Rokkan Narcy, Fanny |
author_sort |
Seuthe, Lena |
title |
Microbial processes in a high-latitude fjord (Kongsfjorden, Svalbard) : II. Ciliates and dinoflagellates |
title_short |
Microbial processes in a high-latitude fjord (Kongsfjorden, Svalbard) : II. Ciliates and dinoflagellates |
title_full |
Microbial processes in a high-latitude fjord (Kongsfjorden, Svalbard) : II. Ciliates and dinoflagellates |
title_fullStr |
Microbial processes in a high-latitude fjord (Kongsfjorden, Svalbard) : II. Ciliates and dinoflagellates |
title_full_unstemmed |
Microbial processes in a high-latitude fjord (Kongsfjorden, Svalbard) : II. Ciliates and dinoflagellates |
title_sort |
microbial processes in a high-latitude fjord (kongsfjorden, svalbard) : ii. ciliates and dinoflagellates |
publisher |
Springer Verlag |
publishDate |
2011 |
url |
https://hdl.handle.net/10037/3778 https://doi.org/10.1007/s00300-010-0930-9 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Kongsfjord* Kongsfjorden Phytoplankton Polar Biology Svalbard Copepods |
genre_facet |
Arctic Kongsfjord* Kongsfjorden Phytoplankton Polar Biology Svalbard Copepods |
op_relation |
Polar Biology 34(2011) nr. 5 s. 751-766 FRIDAID 837211 doi:10.1007/s00300-010-0930-9 0722-4060 https://hdl.handle.net/10037/3778 URN:NBN:no-uit_munin_3489 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1007/s00300-010-0930-9 |
container_title |
Polar Biology |
container_volume |
34 |
container_issue |
5 |
container_start_page |
751 |
op_container_end_page |
766 |
_version_ |
1766332893506830336 |