The Combined Effects of Increased pCO2 and Warming on a Coastal Phytoplankton Assemblage: From Species Composition to Sinking Rate
In addition to ocean acidification, a significant recent warming trend in Chinese coastal waters has received much attention. However, studies of the combined effects of warming and acidification on natural coastal phytoplankton assemblages here are scarce. We conducted a continuous incubation exper...
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ftdoajarticles:oai:doaj.org/article:58c99716ca864d61a83ab24c2f3c7004 2023-05-15T17:50:07+02:00 The Combined Effects of Increased pCO2 and Warming on a Coastal Phytoplankton Assemblage: From Species Composition to Sinking Rate Yuanyuan Feng Fei Chai Mark L. Wells Yan Liao Pengfei Li Ting Cai Ting Zhao Feixue Fu David A. Hutchins 2021-03-01T00:00:00Z https://doi.org/10.3389/fmars.2021.622319 https://doaj.org/article/58c99716ca864d61a83ab24c2f3c7004 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2021.622319/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2021.622319 https://doaj.org/article/58c99716ca864d61a83ab24c2f3c7004 Frontiers in Marine Science, Vol 8 (2021) ocean acidification warming phytoplankton diatoms biogenic silica sinking rate Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2021 ftdoajarticles https://doi.org/10.3389/fmars.2021.622319 2022-12-31T07:06:46Z In addition to ocean acidification, a significant recent warming trend in Chinese coastal waters has received much attention. However, studies of the combined effects of warming and acidification on natural coastal phytoplankton assemblages here are scarce. We conducted a continuous incubation experiment with a natural spring phytoplankton assemblage collected from the Bohai Sea near Tianjin. Experimental treatments used a full factorial combination of temperature (7 and 11°C) and pCO2 (400 and 800 ppm) treatments. Results suggest that changes in pCO2 and temperature had both individual and interactive effects on phytoplankton species composition and elemental stoichiometry. Warming mainly favored the accumulation of picoplankton and dinoflagellate biomass. Increased pCO2 significantly increased particulate organic carbon to particulate organic phosphorus (C:P) and particulate organic carbon to biogenic silica (C:BSi) ratios, and decreased total diatom abundance; in the meanwhile, higher pCO2 significantly increased the ratio of centric to pennate diatom abundance. Warming and increased pCO2 both greatly decreased the proportion of diatoms to dinoflagellates. The highest chlorophyll a biomass was observed in the high pCO2, high temperature phytoplankton assemblage, which also had the slowest sinking rate of all treatments. Overall, there were significant interactive effects of increased pCO2 and warming on dinoflagellate abundance, pennate diatom abundance, diatom vs. dinoflagellates ratio and the centric vs. pennate ratio. These findings suggest that future ocean acidification and warming trends may individually and cumulatively affect coastal biogeochemistry and carbon fluxes through shifts in phytoplankton species composition and sinking rates. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Frontiers in Marine Science 8 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
ocean acidification warming phytoplankton diatoms biogenic silica sinking rate Science Q General. Including nature conservation geographical distribution QH1-199.5 |
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ocean acidification warming phytoplankton diatoms biogenic silica sinking rate Science Q General. Including nature conservation geographical distribution QH1-199.5 Yuanyuan Feng Fei Chai Mark L. Wells Yan Liao Pengfei Li Ting Cai Ting Zhao Feixue Fu David A. Hutchins The Combined Effects of Increased pCO2 and Warming on a Coastal Phytoplankton Assemblage: From Species Composition to Sinking Rate |
topic_facet |
ocean acidification warming phytoplankton diatoms biogenic silica sinking rate Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
In addition to ocean acidification, a significant recent warming trend in Chinese coastal waters has received much attention. However, studies of the combined effects of warming and acidification on natural coastal phytoplankton assemblages here are scarce. We conducted a continuous incubation experiment with a natural spring phytoplankton assemblage collected from the Bohai Sea near Tianjin. Experimental treatments used a full factorial combination of temperature (7 and 11°C) and pCO2 (400 and 800 ppm) treatments. Results suggest that changes in pCO2 and temperature had both individual and interactive effects on phytoplankton species composition and elemental stoichiometry. Warming mainly favored the accumulation of picoplankton and dinoflagellate biomass. Increased pCO2 significantly increased particulate organic carbon to particulate organic phosphorus (C:P) and particulate organic carbon to biogenic silica (C:BSi) ratios, and decreased total diatom abundance; in the meanwhile, higher pCO2 significantly increased the ratio of centric to pennate diatom abundance. Warming and increased pCO2 both greatly decreased the proportion of diatoms to dinoflagellates. The highest chlorophyll a biomass was observed in the high pCO2, high temperature phytoplankton assemblage, which also had the slowest sinking rate of all treatments. Overall, there were significant interactive effects of increased pCO2 and warming on dinoflagellate abundance, pennate diatom abundance, diatom vs. dinoflagellates ratio and the centric vs. pennate ratio. These findings suggest that future ocean acidification and warming trends may individually and cumulatively affect coastal biogeochemistry and carbon fluxes through shifts in phytoplankton species composition and sinking rates. |
format |
Article in Journal/Newspaper |
author |
Yuanyuan Feng Fei Chai Mark L. Wells Yan Liao Pengfei Li Ting Cai Ting Zhao Feixue Fu David A. Hutchins |
author_facet |
Yuanyuan Feng Fei Chai Mark L. Wells Yan Liao Pengfei Li Ting Cai Ting Zhao Feixue Fu David A. Hutchins |
author_sort |
Yuanyuan Feng |
title |
The Combined Effects of Increased pCO2 and Warming on a Coastal Phytoplankton Assemblage: From Species Composition to Sinking Rate |
title_short |
The Combined Effects of Increased pCO2 and Warming on a Coastal Phytoplankton Assemblage: From Species Composition to Sinking Rate |
title_full |
The Combined Effects of Increased pCO2 and Warming on a Coastal Phytoplankton Assemblage: From Species Composition to Sinking Rate |
title_fullStr |
The Combined Effects of Increased pCO2 and Warming on a Coastal Phytoplankton Assemblage: From Species Composition to Sinking Rate |
title_full_unstemmed |
The Combined Effects of Increased pCO2 and Warming on a Coastal Phytoplankton Assemblage: From Species Composition to Sinking Rate |
title_sort |
combined effects of increased pco2 and warming on a coastal phytoplankton assemblage: from species composition to sinking rate |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/fmars.2021.622319 https://doaj.org/article/58c99716ca864d61a83ab24c2f3c7004 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Frontiers in Marine Science, Vol 8 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2021.622319/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2021.622319 https://doaj.org/article/58c99716ca864d61a83ab24c2f3c7004 |
op_doi |
https://doi.org/10.3389/fmars.2021.622319 |
container_title |
Frontiers in Marine Science |
container_volume |
8 |
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1766156716760629248 |