A comparison of nutrient‐limited productivity in Sargassum natans from neritic vs. oceanic waters of the western North Atlantic Ocean
Physiological studies and seawater nutrient analysis showed that the productivity of the macroalga Sargassum natans was significantly enhanced by higher N and P availability in neritic compared to oceanic waters of the western North Atlantic Ocean (17–40°N). The initial slope of the P vs. I curve (...
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Language: | English |
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Wiley
1995
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Online Access: | http://dx.doi.org/10.4319/lo.1995.40.3.0625 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1995.40.3.0625 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1995.40.3.0625 |
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crwiley:10.4319/lo.1995.40.3.0625 2024-09-30T14:39:24+00:00 A comparison of nutrient‐limited productivity in Sargassum natans from neritic vs. oceanic waters of the western North Atlantic Ocean Lapointe, Brian E. 1995 http://dx.doi.org/10.4319/lo.1995.40.3.0625 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1995.40.3.0625 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1995.40.3.0625 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 40, issue 3, page 625-633 ISSN 0024-3590 1939-5590 journal-article 1995 crwiley https://doi.org/10.4319/lo.1995.40.3.0625 2024-09-17T04:48:39Z Physiological studies and seawater nutrient analysis showed that the productivity of the macroalga Sargassum natans was significantly enhanced by higher N and P availability in neritic compared to oceanic waters of the western North Atlantic Ocean (17–40°N). The initial slope of the P vs. I curve ( α ), photosynthetic capacity ( P max ), dark respiration, and the light saturation irradiance ( I ) were all significantly greater in neritic compared to oceanic populations. The higher productivity of neritic S. natans correlated with higher levels of tissue N and P; C: N, C: P, and N: P ratios averaged 27.9, 347, and 10.2 in neritic populations compared to 49.4, 877, and 18.1 in oceanic populations. Lower alkaline phosphatase activity in neritic vs. oceanic populations corroborated the higher P limitation in oceanic waters. Experimental pulses with dissolved inorganic N, DIN (NO 3 − ), and soluble reactive phosphate, SRP (PO 4 3− ), significantly enhanced net P max and dark respiration of oceanic but not neritic S. natans, demonstrating that increased N and P availability enhances productivity of nutrient‐depleted S. natans. Higher DIN and SRP concentrations within Sargassum windrows along shelf fronts in neritic regions explained the higher productivity and suggest that chronic nutrient limitation in oceanic regions is related to highly patchy nutrient supply. Article in Journal/Newspaper North Atlantic Wiley Online Library Limnology and Oceanography 40 3 625 633 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Physiological studies and seawater nutrient analysis showed that the productivity of the macroalga Sargassum natans was significantly enhanced by higher N and P availability in neritic compared to oceanic waters of the western North Atlantic Ocean (17–40°N). The initial slope of the P vs. I curve ( α ), photosynthetic capacity ( P max ), dark respiration, and the light saturation irradiance ( I ) were all significantly greater in neritic compared to oceanic populations. The higher productivity of neritic S. natans correlated with higher levels of tissue N and P; C: N, C: P, and N: P ratios averaged 27.9, 347, and 10.2 in neritic populations compared to 49.4, 877, and 18.1 in oceanic populations. Lower alkaline phosphatase activity in neritic vs. oceanic populations corroborated the higher P limitation in oceanic waters. Experimental pulses with dissolved inorganic N, DIN (NO 3 − ), and soluble reactive phosphate, SRP (PO 4 3− ), significantly enhanced net P max and dark respiration of oceanic but not neritic S. natans, demonstrating that increased N and P availability enhances productivity of nutrient‐depleted S. natans. Higher DIN and SRP concentrations within Sargassum windrows along shelf fronts in neritic regions explained the higher productivity and suggest that chronic nutrient limitation in oceanic regions is related to highly patchy nutrient supply. |
format |
Article in Journal/Newspaper |
author |
Lapointe, Brian E. |
spellingShingle |
Lapointe, Brian E. A comparison of nutrient‐limited productivity in Sargassum natans from neritic vs. oceanic waters of the western North Atlantic Ocean |
author_facet |
Lapointe, Brian E. |
author_sort |
Lapointe, Brian E. |
title |
A comparison of nutrient‐limited productivity in Sargassum natans from neritic vs. oceanic waters of the western North Atlantic Ocean |
title_short |
A comparison of nutrient‐limited productivity in Sargassum natans from neritic vs. oceanic waters of the western North Atlantic Ocean |
title_full |
A comparison of nutrient‐limited productivity in Sargassum natans from neritic vs. oceanic waters of the western North Atlantic Ocean |
title_fullStr |
A comparison of nutrient‐limited productivity in Sargassum natans from neritic vs. oceanic waters of the western North Atlantic Ocean |
title_full_unstemmed |
A comparison of nutrient‐limited productivity in Sargassum natans from neritic vs. oceanic waters of the western North Atlantic Ocean |
title_sort |
comparison of nutrient‐limited productivity in sargassum natans from neritic vs. oceanic waters of the western north atlantic ocean |
publisher |
Wiley |
publishDate |
1995 |
url |
http://dx.doi.org/10.4319/lo.1995.40.3.0625 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.4319%2Flo.1995.40.3.0625 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.4319/lo.1995.40.3.0625 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Limnology and Oceanography volume 40, issue 3, page 625-633 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.4319/lo.1995.40.3.0625 |
container_title |
Limnology and Oceanography |
container_volume |
40 |
container_issue |
3 |
container_start_page |
625 |
op_container_end_page |
633 |
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1811641994993205248 |