Shift towards larger diatoms in a natural phytoplankton assemblage under combined high-CO2 and warming conditions
An indoor mesocosm experiment was carried out to investigate the combined effects of ocean acidification and warming on the species composition and biogeochemical element cycling during a winter/spring bloom with a natural phytoplankton assemblage from the Kiel fjord, Germany. The experimental setup...
Published in: | Journal of Plankton Research |
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Format: | Article in Journal/Newspaper |
Language: | unknown |
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Online Access: | https://epubs.scu.edu.au/esm_pubs/3568 https://doi.org/10.1093/plankt/fby018 |
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ftsoutherncu:oai:epubs.scu.edu.au:esm_pubs-4596 2023-05-15T17:50:42+02:00 Shift towards larger diatoms in a natural phytoplankton assemblage under combined high-CO2 and warming conditions Sett, Scarlett Schulz, Kai G Bach, Lennart T Riebesell, Ulf 2018-01-01T08:00:00Z https://epubs.scu.edu.au/esm_pubs/3568 https://doi.org/10.1093/plankt/fby018 unknown ePublications@SCU School of Environment, Science and Engineering Papers Ocean acidification; warming; diatoms; spring bloom; mesocosms Environmental Sciences article 2018 ftsoutherncu https://doi.org/10.1093/plankt/fby018 2019-08-06T13:18:04Z An indoor mesocosm experiment was carried out to investigate the combined effects of ocean acidification and warming on the species composition and biogeochemical element cycling during a winter/spring bloom with a natural phytoplankton assemblage from the Kiel fjord, Germany. The experimental setup consisted of a “Control” (ambient temperature of ~4.8 °C and ~535 ± 25 μatm pCO2), a “High-CO2” treatment (ambient temperature and initially 1020 ± 45 μatm pCO2) and a “Greenhouse” treatment (~8.5 °C and initially 990 ± 60 μatm pCO2). Nutrient replete conditions prevailed at the beginning of the experiment and light was provided at in situ levels upon reaching pCO2 target levels. A diatom-dominated bloom developed in all treatments with Skeletonema costatum as the dominant species but with an increased abundance and biomass contribution of larger diatom species in the Greenhouse treatment. Conditions in the Greenhouse treatment accelerated bloom development with faster utilization of inorganic nutrients and an earlier peak in phytoplankton biomass compared to the Control and High CO2 but no difference in maximum concentration of particulate organic matter (POM) between treatments. Loss of POM in the Greenhouse treatment, however, was twice as high as in the Control and High CO2 treatment at the end of the experiment, most likely due to an increased proportion of larger diatom species in that treatment. We hypothesize that the combination of warming and acidification can induce shifts in diatom species composition with potential feedbacks on biogeochemical element cycling. Article in Journal/Newspaper Ocean acidification Southern Cross University: epublications@SCU Journal of Plankton Research 40 4 391 406 |
institution |
Open Polar |
collection |
Southern Cross University: epublications@SCU |
op_collection_id |
ftsoutherncu |
language |
unknown |
topic |
Ocean acidification; warming; diatoms; spring bloom; mesocosms Environmental Sciences |
spellingShingle |
Ocean acidification; warming; diatoms; spring bloom; mesocosms Environmental Sciences Sett, Scarlett Schulz, Kai G Bach, Lennart T Riebesell, Ulf Shift towards larger diatoms in a natural phytoplankton assemblage under combined high-CO2 and warming conditions |
topic_facet |
Ocean acidification; warming; diatoms; spring bloom; mesocosms Environmental Sciences |
description |
An indoor mesocosm experiment was carried out to investigate the combined effects of ocean acidification and warming on the species composition and biogeochemical element cycling during a winter/spring bloom with a natural phytoplankton assemblage from the Kiel fjord, Germany. The experimental setup consisted of a “Control” (ambient temperature of ~4.8 °C and ~535 ± 25 μatm pCO2), a “High-CO2” treatment (ambient temperature and initially 1020 ± 45 μatm pCO2) and a “Greenhouse” treatment (~8.5 °C and initially 990 ± 60 μatm pCO2). Nutrient replete conditions prevailed at the beginning of the experiment and light was provided at in situ levels upon reaching pCO2 target levels. A diatom-dominated bloom developed in all treatments with Skeletonema costatum as the dominant species but with an increased abundance and biomass contribution of larger diatom species in the Greenhouse treatment. Conditions in the Greenhouse treatment accelerated bloom development with faster utilization of inorganic nutrients and an earlier peak in phytoplankton biomass compared to the Control and High CO2 but no difference in maximum concentration of particulate organic matter (POM) between treatments. Loss of POM in the Greenhouse treatment, however, was twice as high as in the Control and High CO2 treatment at the end of the experiment, most likely due to an increased proportion of larger diatom species in that treatment. We hypothesize that the combination of warming and acidification can induce shifts in diatom species composition with potential feedbacks on biogeochemical element cycling. |
format |
Article in Journal/Newspaper |
author |
Sett, Scarlett Schulz, Kai G Bach, Lennart T Riebesell, Ulf |
author_facet |
Sett, Scarlett Schulz, Kai G Bach, Lennart T Riebesell, Ulf |
author_sort |
Sett, Scarlett |
title |
Shift towards larger diatoms in a natural phytoplankton assemblage under combined high-CO2 and warming conditions |
title_short |
Shift towards larger diatoms in a natural phytoplankton assemblage under combined high-CO2 and warming conditions |
title_full |
Shift towards larger diatoms in a natural phytoplankton assemblage under combined high-CO2 and warming conditions |
title_fullStr |
Shift towards larger diatoms in a natural phytoplankton assemblage under combined high-CO2 and warming conditions |
title_full_unstemmed |
Shift towards larger diatoms in a natural phytoplankton assemblage under combined high-CO2 and warming conditions |
title_sort |
shift towards larger diatoms in a natural phytoplankton assemblage under combined high-co2 and warming conditions |
publisher |
ePublications@SCU |
publishDate |
2018 |
url |
https://epubs.scu.edu.au/esm_pubs/3568 https://doi.org/10.1093/plankt/fby018 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
School of Environment, Science and Engineering Papers |
op_doi |
https://doi.org/10.1093/plankt/fby018 |
container_title |
Journal of Plankton Research |
container_volume |
40 |
container_issue |
4 |
container_start_page |
391 |
op_container_end_page |
406 |
_version_ |
1766157576868724736 |