Effects of mixing on the pelagic food web in shallow lakes
1. We examined the effects of wind-induced mixing and particle resuspension on the pelagic food web in eutrophic shallow lakes. These processes are known to have a major impact on a variety of biological, physical or chemical parameters such as the underwater light climate, the nutrient availability...
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Online Access: | https://hal.inrae.fr/hal-02916359 https://doi.org/10.1111/fwb.12859 |
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ftccsdartic:oai:HAL:hal-02916359v1 2023-05-15T18:49:45+02:00 Effects of mixing on the pelagic food web in shallow lakes Ydie, L Lo Tt I Er E, B Jaffar-Bandjee, Mourad Ep H A N J A C Q U E T †, S, Millot ‡ A N, Alexis Fl, D Ce, Oren Ulot, D Ecologie Systématique et Evolution (ESE) Centre National de la Recherche Scientifique (CNRS)-AgroParisTech-Université Paris-Sud - Paris 11 (UP11) French National Research Agency (ANR)CEPL 01004French National Research Agency (ANR)ANR-10-EQPX-13-01 2017-06-15 https://hal.inrae.fr/hal-02916359 https://doi.org/10.1111/fwb.12859 en eng HAL CCSD Wiley info:eu-repo/semantics/altIdentifier/doi/10.1111/fwb.12859 hal-02916359 https://hal.inrae.fr/hal-02916359 doi:10.1111/fwb.12859 WOS: 000390146000014 ISSN: 0046-5070 EISSN: 1365-2427 Freshwater Biology https://hal.inrae.fr/hal-02916359 Freshwater Biology, Wiley, 2017, ⟨10.1111/fwb.12859⟩ mixing shallow lakes mesocosms food web [SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2017 ftccsdartic https://doi.org/10.1111/fwb.12859 2020-12-23T23:28:08Z 1. We examined the effects of wind-induced mixing and particle resuspension on the pelagic food web in eutrophic shallow lakes. These processes are known to have a major impact on a variety of biological, physical or chemical parameters such as the underwater light climate, the nutrient availability in the water column and the abundance and composition of the phytoplankton community. However, little is known about the effects of these processes on other compartments of the freshwater food web. 2. We conducted a 9-week experiment comprising a manipulation of mixing intensity in 15 m 3 mesocosms equipped with wavemakers in order to explore the impact of two mixing regimes on water chemistry as well as viral, bacterial, phytoplankton and zooplankton communities. 3. The turbidity level in mixed mesocosms (compared to calm conditions) was higher on average, especially at the bottom, indicating a successful resuspension of the sediment bed. Mixing increased chlorophyll a concentration without any clear increase in algal abundance, measured as cell counts by flow cytometry, which pointed to a change in species composition or a physiological adaptation to mixing. pH increased strongly in mixed mesocosms, suggesting enhanced primary productivity in perturbed conditions. Zooplankton responses to mixing were neutral for cladocerans and negative for copepods, which potentially mediated top-down controls on the rotifer population. 4. Bacterial and viral abundances were not significantly changed by the mixing regimes; however, peaks of viral lysis of heterotrophic bacteria were seen in each mixed mesocosm, while none were observed in calm mesocosms. These results suggest that viral lysis is enhanced by the water column mixing. 5. Our experiment demonstrates that mixing is likely to influence shallow lake functioning through a complex combination of direct and indirect effects on the underwater light climate and water chemistry, phytoplankton physiology and productivity, zooplankton growth and possibly virus-host interactions. ... Article in Journal/Newspaper Copepods Rotifer Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Freshwater Biology 62 1 161 177 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
mixing shallow lakes mesocosms food web [SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
mixing shallow lakes mesocosms food web [SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes Ydie, L Lo Tt I Er E, B Jaffar-Bandjee, Mourad Ep H A N J A C Q U E T †, S, Millot ‡ A N, Alexis Fl, D Ce, Oren Ulot, D Effects of mixing on the pelagic food web in shallow lakes |
topic_facet |
mixing shallow lakes mesocosms food web [SDE]Environmental Sciences [SDE.MCG]Environmental Sciences/Global Changes |
description |
1. We examined the effects of wind-induced mixing and particle resuspension on the pelagic food web in eutrophic shallow lakes. These processes are known to have a major impact on a variety of biological, physical or chemical parameters such as the underwater light climate, the nutrient availability in the water column and the abundance and composition of the phytoplankton community. However, little is known about the effects of these processes on other compartments of the freshwater food web. 2. We conducted a 9-week experiment comprising a manipulation of mixing intensity in 15 m 3 mesocosms equipped with wavemakers in order to explore the impact of two mixing regimes on water chemistry as well as viral, bacterial, phytoplankton and zooplankton communities. 3. The turbidity level in mixed mesocosms (compared to calm conditions) was higher on average, especially at the bottom, indicating a successful resuspension of the sediment bed. Mixing increased chlorophyll a concentration without any clear increase in algal abundance, measured as cell counts by flow cytometry, which pointed to a change in species composition or a physiological adaptation to mixing. pH increased strongly in mixed mesocosms, suggesting enhanced primary productivity in perturbed conditions. Zooplankton responses to mixing were neutral for cladocerans and negative for copepods, which potentially mediated top-down controls on the rotifer population. 4. Bacterial and viral abundances were not significantly changed by the mixing regimes; however, peaks of viral lysis of heterotrophic bacteria were seen in each mixed mesocosm, while none were observed in calm mesocosms. These results suggest that viral lysis is enhanced by the water column mixing. 5. Our experiment demonstrates that mixing is likely to influence shallow lake functioning through a complex combination of direct and indirect effects on the underwater light climate and water chemistry, phytoplankton physiology and productivity, zooplankton growth and possibly virus-host interactions. ... |
author2 |
Ecologie Systématique et Evolution (ESE) Centre National de la Recherche Scientifique (CNRS)-AgroParisTech-Université Paris-Sud - Paris 11 (UP11) French National Research Agency (ANR)CEPL 01004French National Research Agency (ANR)ANR-10-EQPX-13-01 |
format |
Article in Journal/Newspaper |
author |
Ydie, L Lo Tt I Er E, B Jaffar-Bandjee, Mourad Ep H A N J A C Q U E T †, S, Millot ‡ A N, Alexis Fl, D Ce, Oren Ulot, D |
author_facet |
Ydie, L Lo Tt I Er E, B Jaffar-Bandjee, Mourad Ep H A N J A C Q U E T †, S, Millot ‡ A N, Alexis Fl, D Ce, Oren Ulot, D |
author_sort |
Ydie, L |
title |
Effects of mixing on the pelagic food web in shallow lakes |
title_short |
Effects of mixing on the pelagic food web in shallow lakes |
title_full |
Effects of mixing on the pelagic food web in shallow lakes |
title_fullStr |
Effects of mixing on the pelagic food web in shallow lakes |
title_full_unstemmed |
Effects of mixing on the pelagic food web in shallow lakes |
title_sort |
effects of mixing on the pelagic food web in shallow lakes |
publisher |
HAL CCSD |
publishDate |
2017 |
url |
https://hal.inrae.fr/hal-02916359 https://doi.org/10.1111/fwb.12859 |
genre |
Copepods Rotifer |
genre_facet |
Copepods Rotifer |
op_source |
ISSN: 0046-5070 EISSN: 1365-2427 Freshwater Biology https://hal.inrae.fr/hal-02916359 Freshwater Biology, Wiley, 2017, ⟨10.1111/fwb.12859⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1111/fwb.12859 hal-02916359 https://hal.inrae.fr/hal-02916359 doi:10.1111/fwb.12859 WOS: 000390146000014 |
op_doi |
https://doi.org/10.1111/fwb.12859 |
container_title |
Freshwater Biology |
container_volume |
62 |
container_issue |
1 |
container_start_page |
161 |
op_container_end_page |
177 |
_version_ |
1766243354174029824 |