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Microphytobenthos of Arctic Kongsfjorden (Svalbard, Norway): biomass and potential primary production along the shore line

Microphytobenthos of Arctic Kongsfjorden (Svalbard, Norway): biomass and potential primary production along the shore line
Microphytobenthos of Arctic Kongsfjorden (Svalbard, Norway): biomass and potential primary production along the shore line
During summer 2007, Arctic microphytobenthic potential primary production was measured at several stations around the coastline of Kongsfjorden (Svalbard, Norway) at ?5 m water depth and at two stations at five different water depths (5, 10, 15, 20, 30 m). Oxygen planar optode sensor spots were used ex situ to determine oxygen exchange in the overlying water of intact sediment cores under controlled light (ca. 100 ?mol photons m?2 s?1) and temperature (2–4°C) conditions. Patches of microalgae (mainly diatoms) covering sandy sediments at water depths down to 30 m showed high biomass of up to 317 mg chl a m?2. In spite of increasing water depth, no significant trend in “photoautotrophic active biomass” (chl a, ratio living/dead cells, cell sizes) and, thus, in primary production was measured at both stations. All sites from ?5 to 30 m water depth exhibited variable rates of net production from ?19 to +40 mg O2 m?2 h?1 (?168 to +360 mg C m?2 day?1) and gross production of about 2–62 mg O2 m?2 h?1 (17–554 mg C m?2 day?1), which is comparable to other polar as well as temperate regions. No relation between photoautotrophic biomass and gross/net production values was found. Microphytobenthos demonstrated significant rates of primary production that is comparable to pelagic production of Kongsfjorden and, hence, emphasised the importance as C source for the zoobenthos.
Arctic benthic diatoms, Biomass and chlorophyll a, Sediment characteristics, Respiration and production
0722-4060
1239-1253
Woelfel, Jana
3bf8f82b-6a64-4a3a-b7cd-0c53f4694792
Schumann, Rhena
aa5164b3-0236-4ff6-a67e-8e11a50287a2
Peine, Florian
d8b9873d-9fd6-450f-a037-207f5dc8dbc2
Flohr, Anita
1e293a22-bdba-408e-9608-fed8b65e4e79
Kruss, Aleksandra
2439ef9e-56bf-45c9-a9c0-1f7fc18de3ca
Tegowski, Jaroslaw
1f460fac-31cf-4ba6-bbf4-141686ccb49b
Blondel, Philippe
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Wiencke, Christian
6ef887f5-a48d-4ff2-acfa-ee039e7121bc
Karsten, Ulf
538cdf0d-ba27-4703-8982-419e44a5954d
Woelfel, Jana
3bf8f82b-6a64-4a3a-b7cd-0c53f4694792
Schumann, Rhena
aa5164b3-0236-4ff6-a67e-8e11a50287a2
Peine, Florian
d8b9873d-9fd6-450f-a037-207f5dc8dbc2
Flohr, Anita
1e293a22-bdba-408e-9608-fed8b65e4e79
Kruss, Aleksandra
2439ef9e-56bf-45c9-a9c0-1f7fc18de3ca
Tegowski, Jaroslaw
1f460fac-31cf-4ba6-bbf4-141686ccb49b
Blondel, Philippe
85c93fe8-dfd1-49dc-aafc-8d821f5ed1a9
Wiencke, Christian
6ef887f5-a48d-4ff2-acfa-ee039e7121bc
Karsten, Ulf
538cdf0d-ba27-4703-8982-419e44a5954d

Woelfel, Jana, Schumann, Rhena, Peine, Florian, Flohr, Anita, Kruss, Aleksandra, Tegowski, Jaroslaw, Blondel, Philippe, Wiencke, Christian and Karsten, Ulf (2010) Microphytobenthos of Arctic Kongsfjorden (Svalbard, Norway): biomass and potential primary production along the shore line. Polar Biology, 33 (9), 1239-1253. (doi:10.1007/s00300-010-0813-0).

Record type: Article

Abstract

During summer 2007, Arctic microphytobenthic potential primary production was measured at several stations around the coastline of Kongsfjorden (Svalbard, Norway) at ?5 m water depth and at two stations at five different water depths (5, 10, 15, 20, 30 m). Oxygen planar optode sensor spots were used ex situ to determine oxygen exchange in the overlying water of intact sediment cores under controlled light (ca. 100 ?mol photons m?2 s?1) and temperature (2–4°C) conditions. Patches of microalgae (mainly diatoms) covering sandy sediments at water depths down to 30 m showed high biomass of up to 317 mg chl a m?2. In spite of increasing water depth, no significant trend in “photoautotrophic active biomass” (chl a, ratio living/dead cells, cell sizes) and, thus, in primary production was measured at both stations. All sites from ?5 to 30 m water depth exhibited variable rates of net production from ?19 to +40 mg O2 m?2 h?1 (?168 to +360 mg C m?2 day?1) and gross production of about 2–62 mg O2 m?2 h?1 (17–554 mg C m?2 day?1), which is comparable to other polar as well as temperate regions. No relation between photoautotrophic biomass and gross/net production values was found. Microphytobenthos demonstrated significant rates of primary production that is comparable to pelagic production of Kongsfjorden and, hence, emphasised the importance as C source for the zoobenthos.

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Published date: September 2010
Keywords: Arctic benthic diatoms, Biomass and chlorophyll a, Sediment characteristics, Respiration and production
Organisations: Geochemistry

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Local EPrints ID: 400917
URI: http://eprints.soton.ac.uk/id/eprint/400917
ISSN: 0722-4060
PURE UUID: a103c121-f80c-4566-924e-db3def42ecca
ORCID for Anita Flohr: ORCID iD orcid.org/0000-0002-5018-5379

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Date deposited: 29 Sep 2016 15:55
Last modified: 17 Dec 2019 01:36

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Contributors

Author: Jana Woelfel
Author: Rhena Schumann
Author: Florian Peine
Author: Anita Flohr ORCID iD
Author: Aleksandra Kruss
Author: Jaroslaw Tegowski
Author: Philippe Blondel
Author: Christian Wiencke
Author: Ulf Karsten

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