Environmental control of phytoplankton distribution and photosynthetic performance at the Jan Mayen Front in the Norwegian Sea
The Jan Mayen Front is located in the Norwegian Sea to the east of the Jan Mayen Ridge and separates warm, salty Atlantic water and colder, less salty Arctic water. The effects of the light regime, hydrographical conditions and nutrients on the variations of chlorophyll a (chl a), quantum efficienci...
Published in: | Journal of Marine Systems |
---|---|
Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2014
|
Subjects: | |
Online Access: | https://portal.findresearcher.sdu.dk/da/publications/08317a2d-eb8d-4667-965a-d32792a671c8 https://doi.org/10.1016/j.jmarsys.2012.01.006 https://findresearcher.sdu.dk/ws/files/66461136/Erga_etal_2012_Environmental_control_of_phytoplank_and_photosyn_in_the_NS.pdf |
id |
ftsydanskunivpub:oai:sdu.dk:publications/08317a2d-eb8d-4667-965a-d32792a671c8 |
---|---|
record_format |
openpolar |
spelling |
ftsydanskunivpub:oai:sdu.dk:publications/08317a2d-eb8d-4667-965a-d32792a671c8 2024-05-19T07:36:01+00:00 Environmental control of phytoplankton distribution and photosynthetic performance at the Jan Mayen Front in the Norwegian Sea Erga, Svein R. Ssebiyonga , Nicolausi Hamre , Børge Frette, Øyvind Hovland, Erlend K. Hancke, Kasper Drinkwater, Kenneth Rey, Francisco 2014 application/pdf https://portal.findresearcher.sdu.dk/da/publications/08317a2d-eb8d-4667-965a-d32792a671c8 https://doi.org/10.1016/j.jmarsys.2012.01.006 https://findresearcher.sdu.dk/ws/files/66461136/Erga_etal_2012_Environmental_control_of_phytoplank_and_photosyn_in_the_NS.pdf eng eng https://portal.findresearcher.sdu.dk/da/publications/08317a2d-eb8d-4667-965a-d32792a671c8 info:eu-repo/semantics/openAccess Erga , S R , Ssebiyonga , N , Hamre , B , Frette , Ø , Hovland , E K , Hancke , K , Drinkwater , K & Rey , F 2014 , ' Environmental control of phytoplankton distribution and photosynthetic performance at the Jan Mayen Front in the Norwegian Sea ' , Journal of Marine Systems , vol. 130 , pp. 193–205 . https://doi.org/10.1016/j.jmarsys.2012.01.006 Norwegian Sea Arctic Front Phytoplankton Nutrients Spectral light Biomass Primary Production article 2014 ftsydanskunivpub https://doi.org/10.1016/j.jmarsys.2012.01.006 2024-05-01T00:16:00Z The Jan Mayen Front is located in the Norwegian Sea to the east of the Jan Mayen Ridge and separates warm, salty Atlantic water and colder, less salty Arctic water. The effects of the light regime, hydrographical conditions and nutrients on the variations of chlorophyll a (chl a), quantum efficiencies of photochemistry in PSII (F v :F m ) and effective absorption cross-section of PSII (σ PSII ) at the Front were studied in June 2007. Stratified waters were seen on both sides of the Front and lowered nutrient concentrations were seen shallower than 10-20m. The lowest values of the spectral diffuse attenuation coefficient, K d (λ), were found at 500-550nm (0.07-0.16m -1 ), while K d (465nm) ranged between 0.08 and 0.17m -1 and K d (380nm) between 0.13 and 0.20m -1 . Chl a concentrations seldom exceeded 1.0mgm -3 outside pure Atlantic Water, while elevated concentrations (3-4mgm -3 ) developed at depth (20-30m) east of the Front in Atlantic Water. For the upper 100m N/P, Si/P, N/Si and POC/PON ratios were 15.2, 8.0, 1.7 and 6.2, respectively. The quantum efficiency was strongly influenced by nutrients, suggesting nutrient limitation of phytoplankton biomass at the Front in June, but also light inhibition probably was a contributing factor in the upper part of the water column. High quantum efficiencies (0.5) and effective absorption cross sections (>700Å 2 quanta -1 ) were seen to the east of the Front and at depth (20-40m) in stratified Atlantic waters. We therefore conclude that the Jan Mayen Front did not have a stimulatory effect on phytoplankton biomass enhancement and photosynthetic performance. This is in part due to the weak horizontal density front caused by density compensation of temperature and salinity characteristics of the adjacent water masses, and the associated weak vertical mixing. Article in Journal/Newspaper Arctic Jan Mayen Norwegian Sea Phytoplankton University of Southern Denmark Research Portal Journal of Marine Systems 130 193 205 |
institution |
Open Polar |
collection |
University of Southern Denmark Research Portal |
op_collection_id |
ftsydanskunivpub |
language |
English |
topic |
Norwegian Sea Arctic Front Phytoplankton Nutrients Spectral light Biomass Primary Production |
spellingShingle |
Norwegian Sea Arctic Front Phytoplankton Nutrients Spectral light Biomass Primary Production Erga, Svein R. Ssebiyonga , Nicolausi Hamre , Børge Frette, Øyvind Hovland, Erlend K. Hancke, Kasper Drinkwater, Kenneth Rey, Francisco Environmental control of phytoplankton distribution and photosynthetic performance at the Jan Mayen Front in the Norwegian Sea |
topic_facet |
Norwegian Sea Arctic Front Phytoplankton Nutrients Spectral light Biomass Primary Production |
description |
The Jan Mayen Front is located in the Norwegian Sea to the east of the Jan Mayen Ridge and separates warm, salty Atlantic water and colder, less salty Arctic water. The effects of the light regime, hydrographical conditions and nutrients on the variations of chlorophyll a (chl a), quantum efficiencies of photochemistry in PSII (F v :F m ) and effective absorption cross-section of PSII (σ PSII ) at the Front were studied in June 2007. Stratified waters were seen on both sides of the Front and lowered nutrient concentrations were seen shallower than 10-20m. The lowest values of the spectral diffuse attenuation coefficient, K d (λ), were found at 500-550nm (0.07-0.16m -1 ), while K d (465nm) ranged between 0.08 and 0.17m -1 and K d (380nm) between 0.13 and 0.20m -1 . Chl a concentrations seldom exceeded 1.0mgm -3 outside pure Atlantic Water, while elevated concentrations (3-4mgm -3 ) developed at depth (20-30m) east of the Front in Atlantic Water. For the upper 100m N/P, Si/P, N/Si and POC/PON ratios were 15.2, 8.0, 1.7 and 6.2, respectively. The quantum efficiency was strongly influenced by nutrients, suggesting nutrient limitation of phytoplankton biomass at the Front in June, but also light inhibition probably was a contributing factor in the upper part of the water column. High quantum efficiencies (0.5) and effective absorption cross sections (>700Å 2 quanta -1 ) were seen to the east of the Front and at depth (20-40m) in stratified Atlantic waters. We therefore conclude that the Jan Mayen Front did not have a stimulatory effect on phytoplankton biomass enhancement and photosynthetic performance. This is in part due to the weak horizontal density front caused by density compensation of temperature and salinity characteristics of the adjacent water masses, and the associated weak vertical mixing. |
format |
Article in Journal/Newspaper |
author |
Erga, Svein R. Ssebiyonga , Nicolausi Hamre , Børge Frette, Øyvind Hovland, Erlend K. Hancke, Kasper Drinkwater, Kenneth Rey, Francisco |
author_facet |
Erga, Svein R. Ssebiyonga , Nicolausi Hamre , Børge Frette, Øyvind Hovland, Erlend K. Hancke, Kasper Drinkwater, Kenneth Rey, Francisco |
author_sort |
Erga, Svein R. |
title |
Environmental control of phytoplankton distribution and photosynthetic performance at the Jan Mayen Front in the Norwegian Sea |
title_short |
Environmental control of phytoplankton distribution and photosynthetic performance at the Jan Mayen Front in the Norwegian Sea |
title_full |
Environmental control of phytoplankton distribution and photosynthetic performance at the Jan Mayen Front in the Norwegian Sea |
title_fullStr |
Environmental control of phytoplankton distribution and photosynthetic performance at the Jan Mayen Front in the Norwegian Sea |
title_full_unstemmed |
Environmental control of phytoplankton distribution and photosynthetic performance at the Jan Mayen Front in the Norwegian Sea |
title_sort |
environmental control of phytoplankton distribution and photosynthetic performance at the jan mayen front in the norwegian sea |
publishDate |
2014 |
url |
https://portal.findresearcher.sdu.dk/da/publications/08317a2d-eb8d-4667-965a-d32792a671c8 https://doi.org/10.1016/j.jmarsys.2012.01.006 https://findresearcher.sdu.dk/ws/files/66461136/Erga_etal_2012_Environmental_control_of_phytoplank_and_photosyn_in_the_NS.pdf |
genre |
Arctic Jan Mayen Norwegian Sea Phytoplankton |
genre_facet |
Arctic Jan Mayen Norwegian Sea Phytoplankton |
op_source |
Erga , S R , Ssebiyonga , N , Hamre , B , Frette , Ø , Hovland , E K , Hancke , K , Drinkwater , K & Rey , F 2014 , ' Environmental control of phytoplankton distribution and photosynthetic performance at the Jan Mayen Front in the Norwegian Sea ' , Journal of Marine Systems , vol. 130 , pp. 193–205 . https://doi.org/10.1016/j.jmarsys.2012.01.006 |
op_relation |
https://portal.findresearcher.sdu.dk/da/publications/08317a2d-eb8d-4667-965a-d32792a671c8 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/j.jmarsys.2012.01.006 |
container_title |
Journal of Marine Systems |
container_volume |
130 |
container_start_page |
193 |
op_container_end_page |
205 |
_version_ |
1799475044997398528 |