Brownification reduces oxygen gross primary production and community respiration and changes the phytoplankton community composition: An in situ mesocosm experiment with high‐frequency sensor measurements in a North Atlantic bay
In recent decades, the increase in terrestrial inputs to freshwater and coastal ecosystems, especially occurring at northern latitudes, has led to a process of water color darkening known as “brownification.” To assess how brownification affects plankton community composition and functioning in nort...
Published in: | Limnology and Oceanography |
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Format: | Article in Journal/Newspaper |
Language: | English |
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ASLO (Association for the Sciences of Limnology and Oceanography)
2022
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Online Access: | https://oceanrep.geomar.de/id/eprint/55374/ https://oceanrep.geomar.de/id/eprint/55374/2/lno12041-sup-0001-supinfo.pdf https://oceanrep.geomar.de/id/eprint/55374/13/2022_Souli_Sommer.pdf https://doi.org/10.1002/lno.12041 |
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ftoceanrep:oai:oceanrep.geomar.de:55374 2024-02-11T10:06:17+01:00 Brownification reduces oxygen gross primary production and community respiration and changes the phytoplankton community composition: An in situ mesocosm experiment with high‐frequency sensor measurements in a North Atlantic bay Soulié, Tanguy Stibor, Herwig Mas, Sébastien Braun, Benjamin Knechtel, Johanna Nejstgaard, Jens C. Sommer, Ulrich Vidussi, Francesca Mostajir, Behzad 2022-04 text https://oceanrep.geomar.de/id/eprint/55374/ https://oceanrep.geomar.de/id/eprint/55374/2/lno12041-sup-0001-supinfo.pdf https://oceanrep.geomar.de/id/eprint/55374/13/2022_Souli_Sommer.pdf https://doi.org/10.1002/lno.12041 en eng ASLO (Association for the Sciences of Limnology and Oceanography) Wiley https://oceanrep.geomar.de/id/eprint/55374/2/lno12041-sup-0001-supinfo.pdf https://oceanrep.geomar.de/id/eprint/55374/13/2022_Souli_Sommer.pdf Soulié, T., Stibor, H., Mas, S., Braun, B., Knechtel, J., Nejstgaard, J. C., Sommer, U., Vidussi, F. and Mostajir, B. (2022) Brownification reduces oxygen gross primary production and community respiration and changes the phytoplankton community composition: An in situ mesocosm experiment with high‐frequency sensor measurements in a North Atlantic bay. Open Access Limnology and Oceanography, 67 (4). pp. 874-887. DOI 10.1002/lno.12041 <https://doi.org/10.1002/lno.12041>. doi:10.1002/lno.12041 cc_by_nc_nd_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed info:eu-repo/semantics/article 2022 ftoceanrep https://doi.org/10.1002/lno.12041 2024-01-15T00:25:07Z In recent decades, the increase in terrestrial inputs to freshwater and coastal ecosystems, especially occurring at northern latitudes, has led to a process of water color darkening known as “brownification.” To assess how brownification affects plankton community composition and functioning in northern coastal areas, an in situ mesocosm experiment using a highly colored humic substance to simulate a brownification event was performed in a North Atlantic bay (Hopavågen, Norway) in August 2019. Manual sampling for analyses of nutrient concentrations, phytoplankton pigments and zooplankton abundances was combined with high-frequency (every 15 min) monitoring of key environmental variables to investigate the response of the plankton community in terms of oxygen metabolism and community composition. In response to brownification, the oxygen gross primary production (GPP) and community respiration (R) slowed down significantly, by almost one-third. However, GPP and R both decreased to the same extent; thus, the oxygen metabolic balance was not affected. Moreover, the chlorophyll-a concentration significantly decreased under brownification, by 9% on average, and the chemotaxonomic pigment composition of the phytoplankton changed, indicating their acclimation to the reduced light availability. In addition, brownification seemed to favor appendicularians, the dominant mesozooplankton group in the mesocosms, which potentially contributed to lowering the phytoplankton biomass. In conclusion, the results of this in situ mesocosm experiment suggest that brownification could induce significant changes in phytoplankton and zooplankton community composition and significantly alter the overall oxygen metabolism of plankton communities in a northern Atlantic bay. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Norway Limnology and Oceanography |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
In recent decades, the increase in terrestrial inputs to freshwater and coastal ecosystems, especially occurring at northern latitudes, has led to a process of water color darkening known as “brownification.” To assess how brownification affects plankton community composition and functioning in northern coastal areas, an in situ mesocosm experiment using a highly colored humic substance to simulate a brownification event was performed in a North Atlantic bay (Hopavågen, Norway) in August 2019. Manual sampling for analyses of nutrient concentrations, phytoplankton pigments and zooplankton abundances was combined with high-frequency (every 15 min) monitoring of key environmental variables to investigate the response of the plankton community in terms of oxygen metabolism and community composition. In response to brownification, the oxygen gross primary production (GPP) and community respiration (R) slowed down significantly, by almost one-third. However, GPP and R both decreased to the same extent; thus, the oxygen metabolic balance was not affected. Moreover, the chlorophyll-a concentration significantly decreased under brownification, by 9% on average, and the chemotaxonomic pigment composition of the phytoplankton changed, indicating their acclimation to the reduced light availability. In addition, brownification seemed to favor appendicularians, the dominant mesozooplankton group in the mesocosms, which potentially contributed to lowering the phytoplankton biomass. In conclusion, the results of this in situ mesocosm experiment suggest that brownification could induce significant changes in phytoplankton and zooplankton community composition and significantly alter the overall oxygen metabolism of plankton communities in a northern Atlantic bay. |
format |
Article in Journal/Newspaper |
author |
Soulié, Tanguy Stibor, Herwig Mas, Sébastien Braun, Benjamin Knechtel, Johanna Nejstgaard, Jens C. Sommer, Ulrich Vidussi, Francesca Mostajir, Behzad |
spellingShingle |
Soulié, Tanguy Stibor, Herwig Mas, Sébastien Braun, Benjamin Knechtel, Johanna Nejstgaard, Jens C. Sommer, Ulrich Vidussi, Francesca Mostajir, Behzad Brownification reduces oxygen gross primary production and community respiration and changes the phytoplankton community composition: An in situ mesocosm experiment with high‐frequency sensor measurements in a North Atlantic bay |
author_facet |
Soulié, Tanguy Stibor, Herwig Mas, Sébastien Braun, Benjamin Knechtel, Johanna Nejstgaard, Jens C. Sommer, Ulrich Vidussi, Francesca Mostajir, Behzad |
author_sort |
Soulié, Tanguy |
title |
Brownification reduces oxygen gross primary production and community respiration and changes the phytoplankton community composition: An in situ mesocosm experiment with high‐frequency sensor measurements in a North Atlantic bay |
title_short |
Brownification reduces oxygen gross primary production and community respiration and changes the phytoplankton community composition: An in situ mesocosm experiment with high‐frequency sensor measurements in a North Atlantic bay |
title_full |
Brownification reduces oxygen gross primary production and community respiration and changes the phytoplankton community composition: An in situ mesocosm experiment with high‐frequency sensor measurements in a North Atlantic bay |
title_fullStr |
Brownification reduces oxygen gross primary production and community respiration and changes the phytoplankton community composition: An in situ mesocosm experiment with high‐frequency sensor measurements in a North Atlantic bay |
title_full_unstemmed |
Brownification reduces oxygen gross primary production and community respiration and changes the phytoplankton community composition: An in situ mesocosm experiment with high‐frequency sensor measurements in a North Atlantic bay |
title_sort |
brownification reduces oxygen gross primary production and community respiration and changes the phytoplankton community composition: an in situ mesocosm experiment with high‐frequency sensor measurements in a north atlantic bay |
publisher |
ASLO (Association for the Sciences of Limnology and Oceanography) |
publishDate |
2022 |
url |
https://oceanrep.geomar.de/id/eprint/55374/ https://oceanrep.geomar.de/id/eprint/55374/2/lno12041-sup-0001-supinfo.pdf https://oceanrep.geomar.de/id/eprint/55374/13/2022_Souli_Sommer.pdf https://doi.org/10.1002/lno.12041 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/55374/2/lno12041-sup-0001-supinfo.pdf https://oceanrep.geomar.de/id/eprint/55374/13/2022_Souli_Sommer.pdf Soulié, T., Stibor, H., Mas, S., Braun, B., Knechtel, J., Nejstgaard, J. C., Sommer, U., Vidussi, F. and Mostajir, B. (2022) Brownification reduces oxygen gross primary production and community respiration and changes the phytoplankton community composition: An in situ mesocosm experiment with high‐frequency sensor measurements in a North Atlantic bay. Open Access Limnology and Oceanography, 67 (4). pp. 874-887. DOI 10.1002/lno.12041 <https://doi.org/10.1002/lno.12041>. doi:10.1002/lno.12041 |
op_rights |
cc_by_nc_nd_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/lno.12041 |
container_title |
Limnology and Oceanography |
_version_ |
1790603919181742080 |