Increased nutrients from aeolian‐dust and riverine origin decrease the CO 2 ‐sink capacity of coastal South Atlantic waters under UVR exposure
Abstract Increases in ultraviolet radiation (UVR) levels due to the ongoing stratification of water bodies and higher nutrient concentrations either through riverine or aeolian‐dust‐inputs are expected in the near future in coastal surface waters. Here, we combined remote‐sensing data of particulate...
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crwiley:10.1002/lno.10764 2024-09-15T18:36:28+00:00 Increased nutrients from aeolian‐dust and riverine origin decrease the CO 2 ‐sink capacity of coastal South Atlantic waters under UVR exposure Cabrerizo, Marco J. Carrillo, Presentación Villafañe, Virginia E. Medina‐Sánchez, Juan Manuel Helbling, E. Walter Consejo Nacional de Investigaciones Científicas y Técnicas Fondo para la Investigación Científica y Tecnológica 2017 http://dx.doi.org/10.1002/lno.10764 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.10764 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10764 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Limnology and Oceanography volume 63, issue 3, page 1191-1203 ISSN 0024-3590 1939-5590 journal-article 2017 crwiley https://doi.org/10.1002/lno.10764 2024-08-27T04:26:57Z Abstract Increases in ultraviolet radiation (UVR) levels due to the ongoing stratification of water bodies and higher nutrient concentrations either through riverine or aeolian‐dust‐inputs are expected in the near future in coastal surface waters. Here, we combined remote‐sensing data of particulate organic carbon (POC; 1997–2016 period), observational data of solar radiation (1999–2015 period), and a mid‐term experimental approach with coastal plankton communities from South Atlantic Ocean (SAO) to test how the interaction between increased nutrients by riverine and aeolian‐dust inputs and high UVR may alter the community dynamics and the CO 2 sink capacity of these ecosystems in the future. Our results show a decline ∼ 27% in the sink capacity of the coastal ecosystems regardless of the nutrient source considered and under high UVR levels. This decreased CO 2 uptake was coupled with a high dynamic photoinhibition and dark recovery of photosystem II and shifts in the community structure toward the dominance by nano‐flagellates. Moreover, remote‐sensing data also evidences an incipient tipping point with decreasing POC values in this area over the annual planktonic succession. Therefore, we propose that to continue this climate and human‐mediated pressure, these metabolic responses could be strengthened and extended to other productive coastal areas. Article in Journal/Newspaper South Atlantic Ocean Wiley Online Library Limnology and Oceanography 63 3 1191 1203 |
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Open Polar |
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Wiley Online Library |
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language |
English |
description |
Abstract Increases in ultraviolet radiation (UVR) levels due to the ongoing stratification of water bodies and higher nutrient concentrations either through riverine or aeolian‐dust‐inputs are expected in the near future in coastal surface waters. Here, we combined remote‐sensing data of particulate organic carbon (POC; 1997–2016 period), observational data of solar radiation (1999–2015 period), and a mid‐term experimental approach with coastal plankton communities from South Atlantic Ocean (SAO) to test how the interaction between increased nutrients by riverine and aeolian‐dust inputs and high UVR may alter the community dynamics and the CO 2 sink capacity of these ecosystems in the future. Our results show a decline ∼ 27% in the sink capacity of the coastal ecosystems regardless of the nutrient source considered and under high UVR levels. This decreased CO 2 uptake was coupled with a high dynamic photoinhibition and dark recovery of photosystem II and shifts in the community structure toward the dominance by nano‐flagellates. Moreover, remote‐sensing data also evidences an incipient tipping point with decreasing POC values in this area over the annual planktonic succession. Therefore, we propose that to continue this climate and human‐mediated pressure, these metabolic responses could be strengthened and extended to other productive coastal areas. |
author2 |
Consejo Nacional de Investigaciones Científicas y Técnicas Fondo para la Investigación Científica y Tecnológica |
format |
Article in Journal/Newspaper |
author |
Cabrerizo, Marco J. Carrillo, Presentación Villafañe, Virginia E. Medina‐Sánchez, Juan Manuel Helbling, E. Walter |
spellingShingle |
Cabrerizo, Marco J. Carrillo, Presentación Villafañe, Virginia E. Medina‐Sánchez, Juan Manuel Helbling, E. Walter Increased nutrients from aeolian‐dust and riverine origin decrease the CO 2 ‐sink capacity of coastal South Atlantic waters under UVR exposure |
author_facet |
Cabrerizo, Marco J. Carrillo, Presentación Villafañe, Virginia E. Medina‐Sánchez, Juan Manuel Helbling, E. Walter |
author_sort |
Cabrerizo, Marco J. |
title |
Increased nutrients from aeolian‐dust and riverine origin decrease the CO 2 ‐sink capacity of coastal South Atlantic waters under UVR exposure |
title_short |
Increased nutrients from aeolian‐dust and riverine origin decrease the CO 2 ‐sink capacity of coastal South Atlantic waters under UVR exposure |
title_full |
Increased nutrients from aeolian‐dust and riverine origin decrease the CO 2 ‐sink capacity of coastal South Atlantic waters under UVR exposure |
title_fullStr |
Increased nutrients from aeolian‐dust and riverine origin decrease the CO 2 ‐sink capacity of coastal South Atlantic waters under UVR exposure |
title_full_unstemmed |
Increased nutrients from aeolian‐dust and riverine origin decrease the CO 2 ‐sink capacity of coastal South Atlantic waters under UVR exposure |
title_sort |
increased nutrients from aeolian‐dust and riverine origin decrease the co 2 ‐sink capacity of coastal south atlantic waters under uvr exposure |
publisher |
Wiley |
publishDate |
2017 |
url |
http://dx.doi.org/10.1002/lno.10764 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.10764 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.10764 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Limnology and Oceanography volume 63, issue 3, page 1191-1203 ISSN 0024-3590 1939-5590 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/lno.10764 |
container_title |
Limnology and Oceanography |
container_volume |
63 |
container_issue |
3 |
container_start_page |
1191 |
op_container_end_page |
1203 |
_version_ |
1810480125264789504 |