Diurnal variability in alkaline phosphatase activity and the potential role of zooplankton
Abstract 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 dis...
Published in: | Limnology and Oceanography Letters |
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Online Access: | https://doi.org/10.1002/lol2.10104 https://doaj.org/article/85f533b658a04b9a9e48e7ce6b80eab7 |
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ftdoajarticles:oai:doaj.org/article:85f533b658a04b9a9e48e7ce6b80eab7 2023-05-15T17:32:46+02:00 Diurnal variability in alkaline phosphatase activity and the potential role of zooplankton C. Davis M. C. Lohan R. Tuerena E. Cerdan‐Garcia E. M. S. Woodward A. Tagliabue C. Mahaffey 2019-06-01T00:00:00Z https://doi.org/10.1002/lol2.10104 https://doaj.org/article/85f533b658a04b9a9e48e7ce6b80eab7 EN eng Wiley https://doi.org/10.1002/lol2.10104 https://doaj.org/toc/2378-2242 2378-2242 doi:10.1002/lol2.10104 https://doaj.org/article/85f533b658a04b9a9e48e7ce6b80eab7 Limnology and Oceanography Letters, Vol 4, Iss 3, Pp 71-78 (2019) Oceanography GC1-1581 article 2019 ftdoajarticles https://doi.org/10.1002/lol2.10104 2022-12-31T14:32:25Z Abstract 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 Directory of Open Access Journals: DOAJ Articles Limnology and Oceanography Letters 4 3 71 78 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Oceanography GC1-1581 |
spellingShingle |
Oceanography GC1-1581 C. Davis M. C. Lohan R. Tuerena E. Cerdan‐Garcia E. M. S. Woodward A. Tagliabue C. Mahaffey Diurnal variability in alkaline phosphatase activity and the potential role of zooplankton |
topic_facet |
Oceanography GC1-1581 |
description |
Abstract 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 |
C. Davis M. C. Lohan R. Tuerena E. Cerdan‐Garcia E. M. S. Woodward A. Tagliabue C. Mahaffey |
author_facet |
C. Davis M. C. Lohan R. Tuerena E. Cerdan‐Garcia E. M. S. Woodward A. Tagliabue C. Mahaffey |
author_sort |
C. Davis |
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 |
publishDate |
2019 |
url |
https://doi.org/10.1002/lol2.10104 https://doaj.org/article/85f533b658a04b9a9e48e7ce6b80eab7 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Limnology and Oceanography Letters, Vol 4, Iss 3, Pp 71-78 (2019) |
op_relation |
https://doi.org/10.1002/lol2.10104 https://doaj.org/toc/2378-2242 2378-2242 doi:10.1002/lol2.10104 https://doaj.org/article/85f533b658a04b9a9e48e7ce6b80eab7 |
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_ |
1766131027885948928 |