Nitrate fertilisation does not enhance CO2 responses in two tropical seagrass species
Seagrasses are often considered “winners” of ocean acidification (OA); however, seagrass productivity responses to OA could be limited by nitrogen availability, since nitrogen-derived metabolites are required for carbon assimilation. We tested nitrogen uptake and assimilation, photosynthesis, growth...
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ftpubmed:oai:pubmedcentral.nih.gov:4792133 2023-05-15T17:50:25+02:00 Nitrate fertilisation does not enhance CO2 responses in two tropical seagrass species Ow, Y. X. Vogel, N. Collier, C. J. Holtum, J. A. M. Flores, F. Uthicke, S. 2016-03-15 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4792133/ http://www.ncbi.nlm.nih.gov/pubmed/26976685 https://doi.org/10.1038/srep23093 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4792133/ http://www.ncbi.nlm.nih.gov/pubmed/26976685 http://dx.doi.org/10.1038/srep23093 Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2016 ftpubmed https://doi.org/10.1038/srep23093 2016-03-20T01:39:22Z Seagrasses are often considered “winners” of ocean acidification (OA); however, seagrass productivity responses to OA could be limited by nitrogen availability, since nitrogen-derived metabolites are required for carbon assimilation. We tested nitrogen uptake and assimilation, photosynthesis, growth, and carbon allocation responses of the tropical seagrasses Halodule uninervis and Thalassia hemprichii to OA scenarios (428, 734 and 1213 μatm pCO2) under two nutrients levels (0.3 and 1.9 μM NO3−). Net primary production (measured as oxygen production) and growth in H. uninervis increased with pCO2 enrichment, but were not affected by nitrate enrichment. However, nitrate enrichment reduced whole plant respiration in H. uninervis. Net primary production and growth did not show significant changes with pCO2 or nitrate by the end of the experiment (24 d) in T. hemprichii. However, nitrate incorporation in T. hemprichii was higher with nitrate enrichment. There was no evidence that nitrogen demand increased with pCO2 enrichment in either species. Contrary to our initial hypothesis, nutrient increases to levels approximating present day flood plumes only had small effects on metabolism. This study highlights that the paradigm of increased productivity of seagrasses under ocean acidification may not be valid for all species under all environmental conditions. Text Ocean acidification PubMed Central (PMC) Scientific Reports 6 1 |
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Article Ow, Y. X. Vogel, N. Collier, C. J. Holtum, J. A. M. Flores, F. Uthicke, S. Nitrate fertilisation does not enhance CO2 responses in two tropical seagrass species |
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description |
Seagrasses are often considered “winners” of ocean acidification (OA); however, seagrass productivity responses to OA could be limited by nitrogen availability, since nitrogen-derived metabolites are required for carbon assimilation. We tested nitrogen uptake and assimilation, photosynthesis, growth, and carbon allocation responses of the tropical seagrasses Halodule uninervis and Thalassia hemprichii to OA scenarios (428, 734 and 1213 μatm pCO2) under two nutrients levels (0.3 and 1.9 μM NO3−). Net primary production (measured as oxygen production) and growth in H. uninervis increased with pCO2 enrichment, but were not affected by nitrate enrichment. However, nitrate enrichment reduced whole plant respiration in H. uninervis. Net primary production and growth did not show significant changes with pCO2 or nitrate by the end of the experiment (24 d) in T. hemprichii. However, nitrate incorporation in T. hemprichii was higher with nitrate enrichment. There was no evidence that nitrogen demand increased with pCO2 enrichment in either species. Contrary to our initial hypothesis, nutrient increases to levels approximating present day flood plumes only had small effects on metabolism. This study highlights that the paradigm of increased productivity of seagrasses under ocean acidification may not be valid for all species under all environmental conditions. |
format |
Text |
author |
Ow, Y. X. Vogel, N. Collier, C. J. Holtum, J. A. M. Flores, F. Uthicke, S. |
author_facet |
Ow, Y. X. Vogel, N. Collier, C. J. Holtum, J. A. M. Flores, F. Uthicke, S. |
author_sort |
Ow, Y. X. |
title |
Nitrate fertilisation does not enhance CO2 responses in two tropical seagrass species |
title_short |
Nitrate fertilisation does not enhance CO2 responses in two tropical seagrass species |
title_full |
Nitrate fertilisation does not enhance CO2 responses in two tropical seagrass species |
title_fullStr |
Nitrate fertilisation does not enhance CO2 responses in two tropical seagrass species |
title_full_unstemmed |
Nitrate fertilisation does not enhance CO2 responses in two tropical seagrass species |
title_sort |
nitrate fertilisation does not enhance co2 responses in two tropical seagrass species |
publisher |
Nature Publishing Group |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4792133/ http://www.ncbi.nlm.nih.gov/pubmed/26976685 https://doi.org/10.1038/srep23093 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4792133/ http://www.ncbi.nlm.nih.gov/pubmed/26976685 http://dx.doi.org/10.1038/srep23093 |
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Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
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CC-BY |
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https://doi.org/10.1038/srep23093 |
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Scientific Reports |
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