Diurnal variability in alkaline phosphatase activity and the potential role of zooplankton
Daily light–dark cycles drive the circadian rhythm of many ocean processes including photosynthesis, gene expression, and zooplankton diel vertical migration (DVM). In phosphate deplete surface ocean regions, microbes produce metalloenzymes, such as alkaline phosphatases (AP), to access dissolved or...
Published in: | Limnology and Oceanography Letters |
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Language: | English |
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2019
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Online Access: | http://livrepository.liverpool.ac.uk/3034176/ https://doi.org/10.1002/lol2.10104 |
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ftunivliverpool:oai:livrepository.liverpool.ac.uk:3034176 2023-05-15T17:32:24+02:00 Diurnal variability in alkaline phosphatase activity and the potential role of zooplankton Davis, CE Tagliabue, A Mahaffey, C 2019 http://livrepository.liverpool.ac.uk/3034176/ https://doi.org/10.1002/lol2.10104 en eng Wiley-Blackwell Davis, CE, Tagliabue, A orcid:0000-0002-3572-3634 and Mahaffey, C orcid:0000-0002-4215-7271 (2019) Diurnal variability in alkaline phosphatase activity and the potential role of zooplankton. Limnology and Oceanography Letters, 4 (3). pp. 71-78. Article NonPeerReviewed 2019 ftunivliverpool https://doi.org/10.1002/lol2.10104 2023-01-19T23:35:37Z Daily light–dark cycles drive the circadian rhythm of many ocean processes including photosynthesis, gene expression, and zooplankton diel vertical migration (DVM). In phosphate deplete surface ocean regions, microbes produce metalloenzymes, such as alkaline phosphatases (AP), to access dissolved organic phosphorus. Here, we provide novel evidence of diurnal variation in AP activity (APA) in the subtropical North Atlantic using two independent datasets, with APA being two- to three-fold higher at night. We demonstrate that zooplankton are a source of AP and postulate that zooplankton DVM is a source of enhanced AP in the surface waters at night, with reduction or degradation of AP during the day. Our results challenge the current assumption that APA is linear over a 24-h period. While future ocean scenarios predict intensification and expansion of oceanic phosphate limitation, our findings indicate a role for zooplankton in regenerating phosphate that is currently missing in conceptual and numerical models. Article in Journal/Newspaper North Atlantic The University of Liverpool Repository Limnology and Oceanography Letters 4 3 71 78 |
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Open Polar |
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The University of Liverpool Repository |
op_collection_id |
ftunivliverpool |
language |
English |
description |
Daily light–dark cycles drive the circadian rhythm of many ocean processes including photosynthesis, gene expression, and zooplankton diel vertical migration (DVM). In phosphate deplete surface ocean regions, microbes produce metalloenzymes, such as alkaline phosphatases (AP), to access dissolved organic phosphorus. Here, we provide novel evidence of diurnal variation in AP activity (APA) in the subtropical North Atlantic using two independent datasets, with APA being two- to three-fold higher at night. We demonstrate that zooplankton are a source of AP and postulate that zooplankton DVM is a source of enhanced AP in the surface waters at night, with reduction or degradation of AP during the day. Our results challenge the current assumption that APA is linear over a 24-h period. While future ocean scenarios predict intensification and expansion of oceanic phosphate limitation, our findings indicate a role for zooplankton in regenerating phosphate that is currently missing in conceptual and numerical models. |
format |
Article in Journal/Newspaper |
author |
Davis, CE Tagliabue, A Mahaffey, C |
spellingShingle |
Davis, CE Tagliabue, A Mahaffey, C Diurnal variability in alkaline phosphatase activity and the potential role of zooplankton |
author_facet |
Davis, CE Tagliabue, A Mahaffey, C |
author_sort |
Davis, CE |
title |
Diurnal variability in alkaline phosphatase activity and the potential role of zooplankton |
title_short |
Diurnal variability in alkaline phosphatase activity and the potential role of zooplankton |
title_full |
Diurnal variability in alkaline phosphatase activity and the potential role of zooplankton |
title_fullStr |
Diurnal variability in alkaline phosphatase activity and the potential role of zooplankton |
title_full_unstemmed |
Diurnal variability in alkaline phosphatase activity and the potential role of zooplankton |
title_sort |
diurnal variability in alkaline phosphatase activity and the potential role of zooplankton |
publisher |
Wiley-Blackwell |
publishDate |
2019 |
url |
http://livrepository.liverpool.ac.uk/3034176/ https://doi.org/10.1002/lol2.10104 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
Davis, CE, Tagliabue, A orcid:0000-0002-3572-3634 and Mahaffey, C orcid:0000-0002-4215-7271 (2019) Diurnal variability in alkaline phosphatase activity and the potential role of zooplankton. Limnology and Oceanography Letters, 4 (3). pp. 71-78. |
op_doi |
https://doi.org/10.1002/lol2.10104 |
container_title |
Limnology and Oceanography Letters |
container_volume |
4 |
container_issue |
3 |
container_start_page |
71 |
op_container_end_page |
78 |
_version_ |
1766130504789131264 |