Interactive effects of temperature and nitrogen source on the elemental stoichiometry of a polar diatom
Abstract A recent study hypothesized that the near‐zero temperatures that generally prevail in Arctic waters negate the influence that different nitrogen (N) sources can otherwise have on the growth and elemental stoichiometry of marine micro‐algae. Here we test this hypothesis experimentally by eva...
Published in: | Limnology and Oceanography |
---|---|
Main Authors: | , , |
Other Authors: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2022
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/lno.12235 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12235 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.12235 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12235 |
id |
crwiley:10.1002/lno.12235 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/lno.12235 2024-06-23T07:50:11+00:00 Interactive effects of temperature and nitrogen source on the elemental stoichiometry of a polar diatom Schiffrine, Nicolas Tremblay, Jean‐Éric Babin, Marcel Canada Excellence Research Chairs, Government of Canada 2022 http://dx.doi.org/10.1002/lno.12235 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12235 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.12235 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12235 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography volume 67, issue 12, page 2750-2762 ISSN 0024-3590 1939-5590 journal-article 2022 crwiley https://doi.org/10.1002/lno.12235 2024-05-31T08:11:39Z Abstract A recent study hypothesized that the near‐zero temperatures that generally prevail in Arctic waters negate the influence that different nitrogen (N) sources can otherwise have on the growth and elemental stoichiometry of marine micro‐algae. Here we test this hypothesis experimentally by evaluating how temperature (0–9°C) affects the growth and elemental stoichiometry of an ecologically relevant Arctic diatom Chaetoceros gelidus growing on different N sources (ammonium, nitrate, urea) at saturating irradiance. Following an initial acclimation period in which steady growth rates were achieved under each experimental treatment, changes in cellular concentrations of chlorophyll a and particulate carbon (C), nitrogen (N), phosphorus (P), and biogenic silica (Si) were monitored. While N source effects on growth rate became manifest as temperature rose above 0°C, the estimated optimal growth temperature was similar in all cases ( T opt = 8.3°C). A positive effect of temperature on the N : P ratio occurred only at 6°C. Above this temperature, the N : P ratio decreased to values close to those observed at 0°C and 3°C. By contrast, the C : N ratio remained nearly invariant between 0°C and 6°C but increased substantially at 9°C. Overall, the results suggest that the presently widespread and successful diatom C. gelidus possesses the ability to remain competitive despite ongoing environmental changes and that its responses to warming and the availability of different N sources may impact elemental fluxes in the future. Article in Journal/Newspaper Arctic Wiley Online Library Arctic Limnology and Oceanography 67 12 2750 2762 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract A recent study hypothesized that the near‐zero temperatures that generally prevail in Arctic waters negate the influence that different nitrogen (N) sources can otherwise have on the growth and elemental stoichiometry of marine micro‐algae. Here we test this hypothesis experimentally by evaluating how temperature (0–9°C) affects the growth and elemental stoichiometry of an ecologically relevant Arctic diatom Chaetoceros gelidus growing on different N sources (ammonium, nitrate, urea) at saturating irradiance. Following an initial acclimation period in which steady growth rates were achieved under each experimental treatment, changes in cellular concentrations of chlorophyll a and particulate carbon (C), nitrogen (N), phosphorus (P), and biogenic silica (Si) were monitored. While N source effects on growth rate became manifest as temperature rose above 0°C, the estimated optimal growth temperature was similar in all cases ( T opt = 8.3°C). A positive effect of temperature on the N : P ratio occurred only at 6°C. Above this temperature, the N : P ratio decreased to values close to those observed at 0°C and 3°C. By contrast, the C : N ratio remained nearly invariant between 0°C and 6°C but increased substantially at 9°C. Overall, the results suggest that the presently widespread and successful diatom C. gelidus possesses the ability to remain competitive despite ongoing environmental changes and that its responses to warming and the availability of different N sources may impact elemental fluxes in the future. |
author2 |
Canada Excellence Research Chairs, Government of Canada |
format |
Article in Journal/Newspaper |
author |
Schiffrine, Nicolas Tremblay, Jean‐Éric Babin, Marcel |
spellingShingle |
Schiffrine, Nicolas Tremblay, Jean‐Éric Babin, Marcel Interactive effects of temperature and nitrogen source on the elemental stoichiometry of a polar diatom |
author_facet |
Schiffrine, Nicolas Tremblay, Jean‐Éric Babin, Marcel |
author_sort |
Schiffrine, Nicolas |
title |
Interactive effects of temperature and nitrogen source on the elemental stoichiometry of a polar diatom |
title_short |
Interactive effects of temperature and nitrogen source on the elemental stoichiometry of a polar diatom |
title_full |
Interactive effects of temperature and nitrogen source on the elemental stoichiometry of a polar diatom |
title_fullStr |
Interactive effects of temperature and nitrogen source on the elemental stoichiometry of a polar diatom |
title_full_unstemmed |
Interactive effects of temperature and nitrogen source on the elemental stoichiometry of a polar diatom |
title_sort |
interactive effects of temperature and nitrogen source on the elemental stoichiometry of a polar diatom |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1002/lno.12235 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12235 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.12235 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.12235 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Limnology and Oceanography volume 67, issue 12, page 2750-2762 ISSN 0024-3590 1939-5590 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lno.12235 |
container_title |
Limnology and Oceanography |
container_volume |
67 |
container_issue |
12 |
container_start_page |
2750 |
op_container_end_page |
2762 |
_version_ |
1802641058440413184 |