Relative influence of nitrogen and phosphorous availability on phytoplankton physiology and productivity in the oligotrophic sub‐tropical North Atlantic Ocean
Nutrient addition bioassay experiments were performed in the low‐nutrient, low‐chlorophyll oligotrophic subtropical North Atlantic Ocean to investigate the influence of nitrogen (N), phosphorus (P), and/or iron (Fe) on phytoplankton physiology and the limitation of primary productivity or picophytop...
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Online Access: | http://dx.doi.org/10.4319/lo.2008.53.1.0291 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2008.53.1.0291 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2008.53.1.0291 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2008.53.1.0291 |
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crwiley:10.4319/lo.2008.53.1.0291 2024-09-15T18:21:50+00:00 Relative influence of nitrogen and phosphorous availability on phytoplankton physiology and productivity in the oligotrophic sub‐tropical North Atlantic Ocean Moore, C. Mark Mills, Matthew M. Langlois, Rebecca Milne, Angela Achterberg, Eric P. La Roche, Julie Geider, Richard J. 2008 http://dx.doi.org/10.4319/lo.2008.53.1.0291 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2008.53.1.0291 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2008.53.1.0291 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2008.53.1.0291 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 53, issue 1, page 291-305 ISSN 0024-3590 1939-5590 journal-article 2008 crwiley https://doi.org/10.4319/lo.2008.53.1.0291 2024-09-03T04:24:22Z Nutrient addition bioassay experiments were performed in the low‐nutrient, low‐chlorophyll oligotrophic subtropical North Atlantic Ocean to investigate the influence of nitrogen (N), phosphorus (P), and/or iron (Fe) on phytoplankton physiology and the limitation of primary productivity or picophytoplankton biomass. Additions of N alone resulted in 1.5‐2 fold increases in primary productivity and chlorophyll after 48 h, with larger (~threefold) increases observed for the addition of P in combination with N (NP). Measurements of cellular chlorophyll contents permitted evaluation of the physiological response of the photosynthetic apparatus to N and P additions in three picophytoplankton groups. In both Prochlorococcus and the picoeukaryotes, cellular chlorophyll increased by similar amounts in N and NP treatments relative to all other treatments, suggesting that pigment synthesis was N limited. In contrast, the increase of cellular chlorophyll was greater in NP than in N treatments in Synechococcus , suggestive of NP co‐limitation. Relative increases in cellular nucleic acid were also only observed in Synechococcus for NP treatments, indicating co‐limitation of net nucleic acid synthesis. A lack of response to relief of nutrient stress for the efficiency of photosystem II photochemistry, F v :F m , suggests that the low nutrient supply to this region resulted in a condition of balanced nutrient limited growth, rather than starvation. N thus appears to be the proximal (i.e. direct physiological) limiting nutrient in the oligotrophic sub‐tropical North Atlantic. In addition, some major picophytoplankton groups, as well as overall autotrophic community biomass, appears to be co‐limited by N and P. Article in Journal/Newspaper North Atlantic Wiley Online Library Limnology and Oceanography 53 1 291 305 |
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Wiley Online Library |
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crwiley |
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English |
description |
Nutrient addition bioassay experiments were performed in the low‐nutrient, low‐chlorophyll oligotrophic subtropical North Atlantic Ocean to investigate the influence of nitrogen (N), phosphorus (P), and/or iron (Fe) on phytoplankton physiology and the limitation of primary productivity or picophytoplankton biomass. Additions of N alone resulted in 1.5‐2 fold increases in primary productivity and chlorophyll after 48 h, with larger (~threefold) increases observed for the addition of P in combination with N (NP). Measurements of cellular chlorophyll contents permitted evaluation of the physiological response of the photosynthetic apparatus to N and P additions in three picophytoplankton groups. In both Prochlorococcus and the picoeukaryotes, cellular chlorophyll increased by similar amounts in N and NP treatments relative to all other treatments, suggesting that pigment synthesis was N limited. In contrast, the increase of cellular chlorophyll was greater in NP than in N treatments in Synechococcus , suggestive of NP co‐limitation. Relative increases in cellular nucleic acid were also only observed in Synechococcus for NP treatments, indicating co‐limitation of net nucleic acid synthesis. A lack of response to relief of nutrient stress for the efficiency of photosystem II photochemistry, F v :F m , suggests that the low nutrient supply to this region resulted in a condition of balanced nutrient limited growth, rather than starvation. N thus appears to be the proximal (i.e. direct physiological) limiting nutrient in the oligotrophic sub‐tropical North Atlantic. In addition, some major picophytoplankton groups, as well as overall autotrophic community biomass, appears to be co‐limited by N and P. |
format |
Article in Journal/Newspaper |
author |
Moore, C. Mark Mills, Matthew M. Langlois, Rebecca Milne, Angela Achterberg, Eric P. La Roche, Julie Geider, Richard J. |
spellingShingle |
Moore, C. Mark Mills, Matthew M. Langlois, Rebecca Milne, Angela Achterberg, Eric P. La Roche, Julie Geider, Richard J. Relative influence of nitrogen and phosphorous availability on phytoplankton physiology and productivity in the oligotrophic sub‐tropical North Atlantic Ocean |
author_facet |
Moore, C. Mark Mills, Matthew M. Langlois, Rebecca Milne, Angela Achterberg, Eric P. La Roche, Julie Geider, Richard J. |
author_sort |
Moore, C. Mark |
title |
Relative influence of nitrogen and phosphorous availability on phytoplankton physiology and productivity in the oligotrophic sub‐tropical North Atlantic Ocean |
title_short |
Relative influence of nitrogen and phosphorous availability on phytoplankton physiology and productivity in the oligotrophic sub‐tropical North Atlantic Ocean |
title_full |
Relative influence of nitrogen and phosphorous availability on phytoplankton physiology and productivity in the oligotrophic sub‐tropical North Atlantic Ocean |
title_fullStr |
Relative influence of nitrogen and phosphorous availability on phytoplankton physiology and productivity in the oligotrophic sub‐tropical North Atlantic Ocean |
title_full_unstemmed |
Relative influence of nitrogen and phosphorous availability on phytoplankton physiology and productivity in the oligotrophic sub‐tropical North Atlantic Ocean |
title_sort |
relative influence of nitrogen and phosphorous availability on phytoplankton physiology and productivity in the oligotrophic sub‐tropical north atlantic ocean |
publisher |
Wiley |
publishDate |
2008 |
url |
http://dx.doi.org/10.4319/lo.2008.53.1.0291 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.2008.53.1.0291 https://onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2008.53.1.0291 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.2008.53.1.0291 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Limnology and Oceanography volume 53, issue 1, page 291-305 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.2008.53.1.0291 |
container_title |
Limnology and Oceanography |
container_volume |
53 |
container_issue |
1 |
container_start_page |
291 |
op_container_end_page |
305 |
_version_ |
1810460819271450624 |