Dissolved organic phosphorus uptake by marine phytoplankton is enhanced by the presence of dissolved organic nitrogen
24 month embargo. Organic nutrients can constitute the major fractions (up to 70%) of aquatic nitrogen (N) and phosphorus (P), but their cycling is poorly understood relative to the inorganic pools. Some phytoplankton species access P from the dissolved organic phosphorus (DOP) pool through expressi...
Published in: | Journal of Experimental Marine Biology and Ecology |
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Online Access: | http://hdl.handle.net/10026.1/15994 https://doi.org/10.1016/j.jembe.2020.151434 |
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ftunivplympearl:oai:pearl.plymouth.ac.uk:10026.1/15994 2024-06-09T07:48:25+00:00 Dissolved organic phosphorus uptake by marine phytoplankton is enhanced by the presence of dissolved organic nitrogen Fitzsimons, MF Probert, I Gaillard, F Rees, AP 2020-09 151434-151434 application/pdf http://hdl.handle.net/10026.1/15994 https://doi.org/10.1016/j.jembe.2020.151434 en eng Elsevier BV ISSN:0022-0981 ISSN:1879-1697 E-ISSN:1879-1697 0022-0981 1879-1697 151434 http://hdl.handle.net/10026.1/15994 doi:10.1016/j.jembe.2020.151434 2021-7-10 Not known Alkaline phosphatase Dissolved organic nitrogen Dissolved organic phosphorus Coastal waters Marine algae P-limitation journal-article Article 2020 ftunivplympearl https://doi.org/10.1016/j.jembe.2020.151434 2024-05-14T23:48:21Z 24 month embargo. Organic nutrients can constitute the major fractions (up to 70%) of aquatic nitrogen (N) and phosphorus (P), but their cycling is poorly understood relative to the inorganic pools. Some phytoplankton species access P from the dissolved organic phosphorus (DOP) pool through expression of alkaline phosphatase (AP), which hydrolyses orthophosphate from organic molecules, and is thought to occur either at low concentrations of dissolved inorganic P (DIP), or elevated ratios of dissolved inorganic N (DIN) to DIP. Three algal strains native to the North-East Atlantic Ocean (coccolithophore, dinoflagellate and diatom species) were grown under representative, temperate conditions, and the dissolved N and P components amended to include dissolved organic N (DON) and DOP. The activity of AP was measured to determine the rate of DOP uptake by each algal species. The addition of DON and DOP enhanced the growth of the algal species, regardless of DIN and DIP concentrations. In cultures where the total concentrations and absolute N: P ratio was unchanged but the N pool included both DON and DIN, an increase in alkaline phosphatase activity (APA) was measured. This suggested that the presence of DON triggered the selective uptake of DOP. The uptake of organic P was confirmed by detection of adenosine in DOP-amended culture media, indicating that P had been cleaved from ADP and ATP added to the media as DOP, and cellular P concentration in these cultures exceeded the calculated concentration based on uptake of DIP only. Our data demonstrates that organic nutrients can enhance and sustain marine algal productivity. The findings have implications for marine ecosystem function and health, since climate change scenarios predict variable riverine inputs to coastal areas, altered N: P ratios, and changes in the inorganic to organic balance of the nutrient pools. Article in Journal/Newspaper North East Atlantic PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) Journal of Experimental Marine Biology and Ecology 530-531 151434 |
institution |
Open Polar |
collection |
PEARL (Plymouth Electronic Archiv & ResearchLibrary, Plymouth University) |
op_collection_id |
ftunivplympearl |
language |
English |
topic |
Alkaline phosphatase Dissolved organic nitrogen Dissolved organic phosphorus Coastal waters Marine algae P-limitation |
spellingShingle |
Alkaline phosphatase Dissolved organic nitrogen Dissolved organic phosphorus Coastal waters Marine algae P-limitation Fitzsimons, MF Probert, I Gaillard, F Rees, AP Dissolved organic phosphorus uptake by marine phytoplankton is enhanced by the presence of dissolved organic nitrogen |
topic_facet |
Alkaline phosphatase Dissolved organic nitrogen Dissolved organic phosphorus Coastal waters Marine algae P-limitation |
description |
24 month embargo. Organic nutrients can constitute the major fractions (up to 70%) of aquatic nitrogen (N) and phosphorus (P), but their cycling is poorly understood relative to the inorganic pools. Some phytoplankton species access P from the dissolved organic phosphorus (DOP) pool through expression of alkaline phosphatase (AP), which hydrolyses orthophosphate from organic molecules, and is thought to occur either at low concentrations of dissolved inorganic P (DIP), or elevated ratios of dissolved inorganic N (DIN) to DIP. Three algal strains native to the North-East Atlantic Ocean (coccolithophore, dinoflagellate and diatom species) were grown under representative, temperate conditions, and the dissolved N and P components amended to include dissolved organic N (DON) and DOP. The activity of AP was measured to determine the rate of DOP uptake by each algal species. The addition of DON and DOP enhanced the growth of the algal species, regardless of DIN and DIP concentrations. In cultures where the total concentrations and absolute N: P ratio was unchanged but the N pool included both DON and DIN, an increase in alkaline phosphatase activity (APA) was measured. This suggested that the presence of DON triggered the selective uptake of DOP. The uptake of organic P was confirmed by detection of adenosine in DOP-amended culture media, indicating that P had been cleaved from ADP and ATP added to the media as DOP, and cellular P concentration in these cultures exceeded the calculated concentration based on uptake of DIP only. Our data demonstrates that organic nutrients can enhance and sustain marine algal productivity. The findings have implications for marine ecosystem function and health, since climate change scenarios predict variable riverine inputs to coastal areas, altered N: P ratios, and changes in the inorganic to organic balance of the nutrient pools. |
format |
Article in Journal/Newspaper |
author |
Fitzsimons, MF Probert, I Gaillard, F Rees, AP |
author_facet |
Fitzsimons, MF Probert, I Gaillard, F Rees, AP |
author_sort |
Fitzsimons, MF |
title |
Dissolved organic phosphorus uptake by marine phytoplankton is enhanced by the presence of dissolved organic nitrogen |
title_short |
Dissolved organic phosphorus uptake by marine phytoplankton is enhanced by the presence of dissolved organic nitrogen |
title_full |
Dissolved organic phosphorus uptake by marine phytoplankton is enhanced by the presence of dissolved organic nitrogen |
title_fullStr |
Dissolved organic phosphorus uptake by marine phytoplankton is enhanced by the presence of dissolved organic nitrogen |
title_full_unstemmed |
Dissolved organic phosphorus uptake by marine phytoplankton is enhanced by the presence of dissolved organic nitrogen |
title_sort |
dissolved organic phosphorus uptake by marine phytoplankton is enhanced by the presence of dissolved organic nitrogen |
publisher |
Elsevier BV |
publishDate |
2020 |
url |
http://hdl.handle.net/10026.1/15994 https://doi.org/10.1016/j.jembe.2020.151434 |
genre |
North East Atlantic |
genre_facet |
North East Atlantic |
op_relation |
ISSN:0022-0981 ISSN:1879-1697 E-ISSN:1879-1697 0022-0981 1879-1697 151434 http://hdl.handle.net/10026.1/15994 doi:10.1016/j.jembe.2020.151434 |
op_rights |
2021-7-10 Not known |
op_doi |
https://doi.org/10.1016/j.jembe.2020.151434 |
container_title |
Journal of Experimental Marine Biology and Ecology |
container_volume |
530-531 |
container_start_page |
151434 |
_version_ |
1801380135302070272 |