Nutrient depletions in the Ross Sea and their relation with pigment stocks
peer reviewed The present article depicts a first attempt to relate the governing nutrient uptake regime and phytopigment signature of the Ross Sea. Based on nutrient and phytopigment data obtained during two cruises in the Ross Sea, two distinct groups were recognised. The first one was characteris...
Published in: | Journal of Marine Systems |
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Format: | Article in Journal/Newspaper |
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Elsevier Science
2000
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Online Access: | https://orbi.uliege.be/handle/2268/19660 https://orbi.uliege.be/bitstream/2268/19660/1/Goeyens%20et%20al.%20JMS%202000.pdf https://doi.org/10.1016/S0924-7963(00)00067-1 |
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ftorbi:oai:orbi.ulg.ac.be:2268/19660 2024-04-21T07:46:42+00:00 Nutrient depletions in the Ross Sea and their relation with pigment stocks Goeyens, Leo Elskens, Marc Catalano, Giulio Lipizer, Marina Hecq, Jean-Henri Goffart, Anne MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège 2000 https://orbi.uliege.be/handle/2268/19660 https://orbi.uliege.be/bitstream/2268/19660/1/Goeyens%20et%20al.%20JMS%202000.pdf https://doi.org/10.1016/S0924-7963(00)00067-1 en eng Elsevier Science urn:issn:0924-7963 https://orbi.uliege.be/handle/2268/19660 info:hdl:2268/19660 https://orbi.uliege.be/bitstream/2268/19660/1/Goeyens%20et%20al.%20JMS%202000.pdf doi:10.1016/S0924-7963(00)00067-1 scopus-id:2-s2.0-0033671471 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Journal of Marine Systems, 27, 195-208 (2000) Antarctica Ross Sea nutrient depletion phytoplankton phytopigments nutrient uptake Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2000 ftorbi https://doi.org/10.1016/S0924-7963(00)00067-1 2024-03-27T14:55:55Z peer reviewed The present article depicts a first attempt to relate the governing nutrient uptake regime and phytopigment signature of the Ross Sea. Based on nutrient and phytopigment data obtained during two cruises in the Ross Sea, two distinct groups were recognised. The first one was characterised by moderate nutrient nitrate and silicic acid depletions in combination with relatively high diatom and Phaeocystis abundance. The second group showed very low nutrient depletions and very poor diatom abundance. Average depth specific nitrate depletions were 8.1 and 1.1 μM and average silicic acid depletions were 21.5 and 1.3 μM, respectively. The nutrient consumption patterns did not match the conditions of silicic acid excess (SEA) or nitrate excess areas (NEA), a clear trend being probably obscured by very poor seasonal maturity of several sampling stations. The contrast between both groups is largely explained by small differences in nitrogen uptake regime of the major phytoplankters. During early season, the diatoms meet the majority of their nitrogen requirements by nitrate uptake, with few exceptions where ammonium is the most important nitrogenous substrate. On average, their nitrate uptake capacity is lower than that of Phaeocystis (average specific nitrate uptake rates were 0.021 and 0.036 day y-1 for diatoms and Phaeocystis, respectively). The latter phytoplankton always shows predominance of nitrate uptake. Both groups are subject to inhibition of nitrate uptake when ammonium availability increases, and it is likely that the diatoms are more sensitive to the inhibitory effect of ammonium. Article in Journal/Newspaper Antarc* Antarctica Ross Sea University of Liège: ORBi (Open Repository and Bibliography) Journal of Marine Systems 27 1-3 195 208 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Antarctica Ross Sea nutrient depletion phytoplankton phytopigments nutrient uptake Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie |
spellingShingle |
Antarctica Ross Sea nutrient depletion phytoplankton phytopigments nutrient uptake Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie Goeyens, Leo Elskens, Marc Catalano, Giulio Lipizer, Marina Hecq, Jean-Henri Goffart, Anne Nutrient depletions in the Ross Sea and their relation with pigment stocks |
topic_facet |
Antarctica Ross Sea nutrient depletion phytoplankton phytopigments nutrient uptake Life sciences Aquatic sciences & oceanology Sciences du vivant Sciences aquatiques & océanologie |
description |
peer reviewed The present article depicts a first attempt to relate the governing nutrient uptake regime and phytopigment signature of the Ross Sea. Based on nutrient and phytopigment data obtained during two cruises in the Ross Sea, two distinct groups were recognised. The first one was characterised by moderate nutrient nitrate and silicic acid depletions in combination with relatively high diatom and Phaeocystis abundance. The second group showed very low nutrient depletions and very poor diatom abundance. Average depth specific nitrate depletions were 8.1 and 1.1 μM and average silicic acid depletions were 21.5 and 1.3 μM, respectively. The nutrient consumption patterns did not match the conditions of silicic acid excess (SEA) or nitrate excess areas (NEA), a clear trend being probably obscured by very poor seasonal maturity of several sampling stations. The contrast between both groups is largely explained by small differences in nitrogen uptake regime of the major phytoplankters. During early season, the diatoms meet the majority of their nitrogen requirements by nitrate uptake, with few exceptions where ammonium is the most important nitrogenous substrate. On average, their nitrate uptake capacity is lower than that of Phaeocystis (average specific nitrate uptake rates were 0.021 and 0.036 day y-1 for diatoms and Phaeocystis, respectively). The latter phytoplankton always shows predominance of nitrate uptake. Both groups are subject to inhibition of nitrate uptake when ammonium availability increases, and it is likely that the diatoms are more sensitive to the inhibitory effect of ammonium. |
author2 |
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège |
format |
Article in Journal/Newspaper |
author |
Goeyens, Leo Elskens, Marc Catalano, Giulio Lipizer, Marina Hecq, Jean-Henri Goffart, Anne |
author_facet |
Goeyens, Leo Elskens, Marc Catalano, Giulio Lipizer, Marina Hecq, Jean-Henri Goffart, Anne |
author_sort |
Goeyens, Leo |
title |
Nutrient depletions in the Ross Sea and their relation with pigment stocks |
title_short |
Nutrient depletions in the Ross Sea and their relation with pigment stocks |
title_full |
Nutrient depletions in the Ross Sea and their relation with pigment stocks |
title_fullStr |
Nutrient depletions in the Ross Sea and their relation with pigment stocks |
title_full_unstemmed |
Nutrient depletions in the Ross Sea and their relation with pigment stocks |
title_sort |
nutrient depletions in the ross sea and their relation with pigment stocks |
publisher |
Elsevier Science |
publishDate |
2000 |
url |
https://orbi.uliege.be/handle/2268/19660 https://orbi.uliege.be/bitstream/2268/19660/1/Goeyens%20et%20al.%20JMS%202000.pdf https://doi.org/10.1016/S0924-7963(00)00067-1 |
genre |
Antarc* Antarctica Ross Sea |
genre_facet |
Antarc* Antarctica Ross Sea |
op_source |
Journal of Marine Systems, 27, 195-208 (2000) |
op_relation |
urn:issn:0924-7963 https://orbi.uliege.be/handle/2268/19660 info:hdl:2268/19660 https://orbi.uliege.be/bitstream/2268/19660/1/Goeyens%20et%20al.%20JMS%202000.pdf doi:10.1016/S0924-7963(00)00067-1 scopus-id:2-s2.0-0033671471 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1016/S0924-7963(00)00067-1 |
container_title |
Journal of Marine Systems |
container_volume |
27 |
container_issue |
1-3 |
container_start_page |
195 |
op_container_end_page |
208 |
_version_ |
1796944270673838080 |