Long photoperiods sustain high pH in Arctic kelp forests
Concern on the impacts of ocean acidification on calcifiers, such as bivalves, sea urchins, and foraminifers, has led to efforts to understand the controls on pH in their habitats, which include kelp forests and seagrass meadows. The metabolism of these habitats can lead to diel fluctuation in pH wi...
Published in: | Science Advances |
---|---|
Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
American Association for the Advancement of Science (AAAS)
2016
|
Subjects: | |
Online Access: | http://hdl.handle.net/10754/656417 https://doi.org/10.1126/sciadv.1501938 |
id |
ftkingabdullahun:oai:repository.kaust.edu.sa:10754/656417 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
King Abdullah University of Science and Technology: KAUST Repository |
op_collection_id |
ftkingabdullahun |
language |
unknown |
topic |
acidification Arctic kelp macrophytes metabolism pH photoperiod Photosynthesis respiration plant-climate interactions |
spellingShingle |
acidification Arctic kelp macrophytes metabolism pH photoperiod Photosynthesis respiration plant-climate interactions Krause-Jensen, Dorte Marbà, Núria Sanz-Martin, Marina Hendriks, Iris E Thyrring, Jakob Carstensen, Jacob Sejr, Mikael Kristian Duarte, Carlos M. Long photoperiods sustain high pH in Arctic kelp forests |
topic_facet |
acidification Arctic kelp macrophytes metabolism pH photoperiod Photosynthesis respiration plant-climate interactions |
description |
Concern on the impacts of ocean acidification on calcifiers, such as bivalves, sea urchins, and foraminifers, has led to efforts to understand the controls on pH in their habitats, which include kelp forests and seagrass meadows. The metabolism of these habitats can lead to diel fluctuation in pH with increases during the day and declines at night, suggesting no net effect on pH at time scales longer than daily. We examined the capacity of subarctic and Arctic kelps to up-regulate pH in situ and experimentally tested the role of photoperiod in determining the capacity of Arctic macrophytes to up-regulate pH. Field observations at photoperiods of 15 and 24 hours in Greenland combined with experimental manipulations of photoperiod show that photoperiods longer than 21 hours, characteristic of Arctic summers, are conducive to sustained up-regulation of pH by kelp photosynthesis. We report a gradual increase in pH of 0.15 units and a parallel decline in pCO2 of 100 parts per million over a 10-day period in an Arctic kelp forest over midsummer, with ample scope for continued pH increase during the months of continuous daylight. Experimental increase in CO2 concentration further stimulated the capacity of macrophytes to deplete CO2 and increase pH. We conclude that long photoperiods in Arctic summers support sustained up-regulation of pH in kelp forests, with potential benefits for calcifiers, and propose that this mechanism may increase with the projected expansion of Arctic vegetation in response to warming and loss of sea ice. We are grateful to J. Baldrich Justel [IMEDEA/Consejo Superior de Investigaciones Científicas (CSIC), Spain] and K. Linding Gerlich (Aarhus University, Denmark) for help in the laboratory and M. Blicher (Greenland Institute of Natural Resources, Greenland), K. Akaaraq, E. Mølgaard, and O. Stecher (Arctic Station, Disko Island, University of Copenhagen, Denmark) for help in the field. Funding: The study was funded by the Danish Environmental Protection Agency within the Danish Cooperation ... |
author2 |
Biological and Environmental Sciences and Engineering (BESE) Division Marine Science Program Red Sea Research Center (RSRC) Arctic Research Centre, Aarhus University, Ny Munkegade 114, Building 1540, 8000 Århus C, Denmark. Department of Bioscience, Aarhus University, Vejlsøvej 25, DK-8600 Silkeborg, Denmark. Department of Global Change Research, Institut Mediterrani d'Estudis Avançats (Consejo Superior de Investigaciones Científicas-Universidad de las Islas Baleares), Miquel Marquès 21, 07190 Esporles, Spain. Facultat de Geologia, Universitat de Barcelona, 08028 Barcelona, Spain. Department of Bioscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark. Faculty of Biosciences, Fisheries and Economics, University of Tromsø, Tromsø, Norway. |
format |
Article in Journal/Newspaper |
author |
Krause-Jensen, Dorte Marbà, Núria Sanz-Martin, Marina Hendriks, Iris E Thyrring, Jakob Carstensen, Jacob Sejr, Mikael Kristian Duarte, Carlos M. |
author_facet |
Krause-Jensen, Dorte Marbà, Núria Sanz-Martin, Marina Hendriks, Iris E Thyrring, Jakob Carstensen, Jacob Sejr, Mikael Kristian Duarte, Carlos M. |
author_sort |
Krause-Jensen, Dorte |
title |
Long photoperiods sustain high pH in Arctic kelp forests |
title_short |
Long photoperiods sustain high pH in Arctic kelp forests |
title_full |
Long photoperiods sustain high pH in Arctic kelp forests |
title_fullStr |
Long photoperiods sustain high pH in Arctic kelp forests |
title_full_unstemmed |
Long photoperiods sustain high pH in Arctic kelp forests |
title_sort |
long photoperiods sustain high ph in arctic kelp forests |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
2016 |
url |
http://hdl.handle.net/10754/656417 https://doi.org/10.1126/sciadv.1501938 |
genre |
Arctic Arctic Greenland Greenland Institute of Natural Resources Ocean acidification Sea ice Subarctic |
genre_facet |
Arctic Arctic Greenland Greenland Institute of Natural Resources Ocean acidification Sea ice Subarctic |
op_relation |
DOI:10.20350/digitalCSIC/7392 http://advances.sciencemag.org/lookup/doi/10.1126/sciadv.1501938 Krause-Jensen, D., Marbà, N., Sanz-Martin, M., Hendriks, I. E., Thyrring, J., Carstensen, J., … Duarte, C. M. (2016). Long photoperiods sustain high pH in Arctic kelp forests. Science Advances, 2(12), e1501938. doi:10.1126/sciadv.1501938 doi:10.1126/sciadv.1501938 Science advances http://hdl.handle.net/10754/656417 |
op_rights |
This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1126/sciadv.150193810.20350/digitalCSIC/739210.20350/digitalcsic/7392 |
container_title |
Science Advances |
container_volume |
2 |
container_issue |
12 |
container_start_page |
e1501938 |
_version_ |
1786808900461264896 |
spelling |
ftkingabdullahun:oai:repository.kaust.edu.sa:10754/656417 2023-12-31T10:02:06+01:00 Long photoperiods sustain high pH in Arctic kelp forests Krause-Jensen, Dorte Marbà, Núria Sanz-Martin, Marina Hendriks, Iris E Thyrring, Jakob Carstensen, Jacob Sejr, Mikael Kristian Duarte, Carlos M. Biological and Environmental Sciences and Engineering (BESE) Division Marine Science Program Red Sea Research Center (RSRC) Arctic Research Centre, Aarhus University, Ny Munkegade 114, Building 1540, 8000 Århus C, Denmark. Department of Bioscience, Aarhus University, Vejlsøvej 25, DK-8600 Silkeborg, Denmark. Department of Global Change Research, Institut Mediterrani d'Estudis Avançats (Consejo Superior de Investigaciones Científicas-Universidad de las Islas Baleares), Miquel Marquès 21, 07190 Esporles, Spain. Facultat de Geologia, Universitat de Barcelona, 08028 Barcelona, Spain. Department of Bioscience, Aarhus University, Frederiksborgvej 399, DK-4000 Roskilde, Denmark. Faculty of Biosciences, Fisheries and Economics, University of Tromsø, Tromsø, Norway. 2016-12-14 application/pdf http://hdl.handle.net/10754/656417 https://doi.org/10.1126/sciadv.1501938 unknown American Association for the Advancement of Science (AAAS) DOI:10.20350/digitalCSIC/7392 http://advances.sciencemag.org/lookup/doi/10.1126/sciadv.1501938 Krause-Jensen, D., Marbà, N., Sanz-Martin, M., Hendriks, I. E., Thyrring, J., Carstensen, J., … Duarte, C. M. (2016). Long photoperiods sustain high pH in Arctic kelp forests. Science Advances, 2(12), e1501938. doi:10.1126/sciadv.1501938 doi:10.1126/sciadv.1501938 Science advances http://hdl.handle.net/10754/656417 This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license, which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited. http://creativecommons.org/licenses/by-nc/4.0/ acidification Arctic kelp macrophytes metabolism pH photoperiod Photosynthesis respiration plant-climate interactions Article 2016 ftkingabdullahun https://doi.org/10.1126/sciadv.150193810.20350/digitalCSIC/739210.20350/digitalcsic/7392 2023-12-02T20:18:43Z Concern on the impacts of ocean acidification on calcifiers, such as bivalves, sea urchins, and foraminifers, has led to efforts to understand the controls on pH in their habitats, which include kelp forests and seagrass meadows. The metabolism of these habitats can lead to diel fluctuation in pH with increases during the day and declines at night, suggesting no net effect on pH at time scales longer than daily. We examined the capacity of subarctic and Arctic kelps to up-regulate pH in situ and experimentally tested the role of photoperiod in determining the capacity of Arctic macrophytes to up-regulate pH. Field observations at photoperiods of 15 and 24 hours in Greenland combined with experimental manipulations of photoperiod show that photoperiods longer than 21 hours, characteristic of Arctic summers, are conducive to sustained up-regulation of pH by kelp photosynthesis. We report a gradual increase in pH of 0.15 units and a parallel decline in pCO2 of 100 parts per million over a 10-day period in an Arctic kelp forest over midsummer, with ample scope for continued pH increase during the months of continuous daylight. Experimental increase in CO2 concentration further stimulated the capacity of macrophytes to deplete CO2 and increase pH. We conclude that long photoperiods in Arctic summers support sustained up-regulation of pH in kelp forests, with potential benefits for calcifiers, and propose that this mechanism may increase with the projected expansion of Arctic vegetation in response to warming and loss of sea ice. We are grateful to J. Baldrich Justel [IMEDEA/Consejo Superior de Investigaciones Científicas (CSIC), Spain] and K. Linding Gerlich (Aarhus University, Denmark) for help in the laboratory and M. Blicher (Greenland Institute of Natural Resources, Greenland), K. Akaaraq, E. Mølgaard, and O. Stecher (Arctic Station, Disko Island, University of Copenhagen, Denmark) for help in the field. Funding: The study was funded by the Danish Environmental Protection Agency within the Danish Cooperation ... Article in Journal/Newspaper Arctic Arctic Greenland Greenland Institute of Natural Resources Ocean acidification Sea ice Subarctic King Abdullah University of Science and Technology: KAUST Repository Science Advances 2 12 e1501938 |