Influence of vertical mixing on light-dependency of phytoplankton growth
Phytoplankton growth depends not only on mean intensity but also on the dynamics of the light supply. In surface mixed layers, phytoplankton may rapidly move between strong light and almost darkness. The nonlinear light-dependency of growth may differ between constant and fluctuating light because o...
Published in: | Limnology and Oceanography |
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Online Access: | http://ir.ihb.ac.cn/handle/342005/30281 http://ir.ihb.ac.cn/handle/342005/30282 https://doi.org/10.1002/lno.10761 |
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ftchinacadsciihb:oai:ir.ihb.ac.cn:342005/30282 2023-05-15T14:02:07+02:00 Influence of vertical mixing on light-dependency of phytoplankton growth Koehler, Jan Wang, Lan Guislain, Alexis Shatwell, Tom 2018-05-01 http://ir.ihb.ac.cn/handle/342005/30281 http://ir.ihb.ac.cn/handle/342005/30282 https://doi.org/10.1002/lno.10761 英语 eng WILEY LIMNOLOGY AND OCEANOGRAPHY http://ir.ihb.ac.cn/handle/342005/30281 http://ir.ihb.ac.cn/handle/342005/30282 doi:10.1002/lno.10761 Marine & Freshwater Biology Oceanography Limnology FRESH-WATER PHYTOPLANKTON IN-SITU GROWTH FLUCTUATING LIGHT MARINE-PHYTOPLANKTON PHOTOSYNTHETIC RESPONSES ULTRAVIOLET-RADIATION UNICELLULAR ALGAE ANTARCTIC DIATOM FLASHING LIGHT PHOTOSYSTEM-II 期刊论文 2018 ftchinacadsciihb https://doi.org/10.1002/lno.10761 2019-08-23T00:03:43Z Phytoplankton growth depends not only on mean intensity but also on the dynamics of the light supply. In surface mixed layers, phytoplankton may rapidly move between strong light and almost darkness. The nonlinear light-dependency of growth may differ between constant and fluctuating light because of the different frequency distribution of light and/or acclimation processes. The present study compares for the first time light-dependency of photosynthesis and growth of phytoplankton communities in situ under defined mixing conditions and at fixed depths. Maximum growth rates per day were not significantly different, but the growth efficiency was much higher under constant light than under fluctuating light of sub-saturating daily irradiance. Phytoplankton incubated under fluctuating light needed about three times higher mean daily irradiances to balance photosynthesis and losses than under constant light. The difference in growth efficiency was mostly caused by the different frequency distribution of underwater light, as was estimated by a photosynthesis model of sufficient temporal resolution. The present study indicates a considerable overestimation of phytoplankton growth at sub-saturating light in well-mixed water layers by the common growth measurements under constant light. This implies an underestimation of the compensation light intensities and respective overestimations of the critical mixing depths. Report Antarc* Antarctic Institute of Hydrobiology, Chinese Academy of Sciences: IHB OpenIR Antarctic Limnology and Oceanography 63 3 1156 1167 |
institution |
Open Polar |
collection |
Institute of Hydrobiology, Chinese Academy of Sciences: IHB OpenIR |
op_collection_id |
ftchinacadsciihb |
language |
English |
topic |
Marine & Freshwater Biology Oceanography Limnology FRESH-WATER PHYTOPLANKTON IN-SITU GROWTH FLUCTUATING LIGHT MARINE-PHYTOPLANKTON PHOTOSYNTHETIC RESPONSES ULTRAVIOLET-RADIATION UNICELLULAR ALGAE ANTARCTIC DIATOM FLASHING LIGHT PHOTOSYSTEM-II |
spellingShingle |
Marine & Freshwater Biology Oceanography Limnology FRESH-WATER PHYTOPLANKTON IN-SITU GROWTH FLUCTUATING LIGHT MARINE-PHYTOPLANKTON PHOTOSYNTHETIC RESPONSES ULTRAVIOLET-RADIATION UNICELLULAR ALGAE ANTARCTIC DIATOM FLASHING LIGHT PHOTOSYSTEM-II Koehler, Jan Wang, Lan Guislain, Alexis Shatwell, Tom Influence of vertical mixing on light-dependency of phytoplankton growth |
topic_facet |
Marine & Freshwater Biology Oceanography Limnology FRESH-WATER PHYTOPLANKTON IN-SITU GROWTH FLUCTUATING LIGHT MARINE-PHYTOPLANKTON PHOTOSYNTHETIC RESPONSES ULTRAVIOLET-RADIATION UNICELLULAR ALGAE ANTARCTIC DIATOM FLASHING LIGHT PHOTOSYSTEM-II |
description |
Phytoplankton growth depends not only on mean intensity but also on the dynamics of the light supply. In surface mixed layers, phytoplankton may rapidly move between strong light and almost darkness. The nonlinear light-dependency of growth may differ between constant and fluctuating light because of the different frequency distribution of light and/or acclimation processes. The present study compares for the first time light-dependency of photosynthesis and growth of phytoplankton communities in situ under defined mixing conditions and at fixed depths. Maximum growth rates per day were not significantly different, but the growth efficiency was much higher under constant light than under fluctuating light of sub-saturating daily irradiance. Phytoplankton incubated under fluctuating light needed about three times higher mean daily irradiances to balance photosynthesis and losses than under constant light. The difference in growth efficiency was mostly caused by the different frequency distribution of underwater light, as was estimated by a photosynthesis model of sufficient temporal resolution. The present study indicates a considerable overestimation of phytoplankton growth at sub-saturating light in well-mixed water layers by the common growth measurements under constant light. This implies an underestimation of the compensation light intensities and respective overestimations of the critical mixing depths. |
format |
Report |
author |
Koehler, Jan Wang, Lan Guislain, Alexis Shatwell, Tom |
author_facet |
Koehler, Jan Wang, Lan Guislain, Alexis Shatwell, Tom |
author_sort |
Koehler, Jan |
title |
Influence of vertical mixing on light-dependency of phytoplankton growth |
title_short |
Influence of vertical mixing on light-dependency of phytoplankton growth |
title_full |
Influence of vertical mixing on light-dependency of phytoplankton growth |
title_fullStr |
Influence of vertical mixing on light-dependency of phytoplankton growth |
title_full_unstemmed |
Influence of vertical mixing on light-dependency of phytoplankton growth |
title_sort |
influence of vertical mixing on light-dependency of phytoplankton growth |
publisher |
WILEY |
publishDate |
2018 |
url |
http://ir.ihb.ac.cn/handle/342005/30281 http://ir.ihb.ac.cn/handle/342005/30282 https://doi.org/10.1002/lno.10761 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
LIMNOLOGY AND OCEANOGRAPHY http://ir.ihb.ac.cn/handle/342005/30281 http://ir.ihb.ac.cn/handle/342005/30282 doi:10.1002/lno.10761 |
op_doi |
https://doi.org/10.1002/lno.10761 |
container_title |
Limnology and Oceanography |
container_volume |
63 |
container_issue |
3 |
container_start_page |
1156 |
op_container_end_page |
1167 |
_version_ |
1766272213508423680 |