Unraveling Lake Geneva's hypoxia crisis in the Anthropocene
Abstract Despite global evidence of lake deoxygenation, its duration, timing, and impacts over decadal to centennial timescales remain uncertain. This study introduces a novel model approach using 150 yr of limnological and paleolimnological data to evaluate the anthropogenic impacts on deep oxygen...
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2025-02-01
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| Series: | Limnology and Oceanography Letters |
| Online Access: | https://doi.org/10.1002/lol2.10435 |
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| author | Laura M. V. Soares Olivia Desgué‐Itier Cécilia Barouillet Céline Casenave Isabelle Domaizon Victor Frossard Nelson G. Hairston Jr. Andrea Lami Bruno J. Lemaire Georges‐Marie Saulnier Frédéric Soulignac Brigitte Vinçon‐Leite Jean‐Philippe Jenny |
| author_facet | Laura M. V. Soares Olivia Desgué‐Itier Cécilia Barouillet Céline Casenave Isabelle Domaizon Victor Frossard Nelson G. Hairston Jr. Andrea Lami Bruno J. Lemaire Georges‐Marie Saulnier Frédéric Soulignac Brigitte Vinçon‐Leite Jean‐Philippe Jenny |
| author_sort | Laura M. V. Soares |
| collection | DOAJ |
| description | Abstract Despite global evidence of lake deoxygenation, its duration, timing, and impacts over decadal to centennial timescales remain uncertain. This study introduces a novel model approach using 150 yr of limnological and paleolimnological data to evaluate the anthropogenic impacts on deep oxygen in Lake Geneva. Results highlight an increase in oxygen consumption rates due to cultural eutrophication, initially triggering historical hypoxia, subsequently exacerbated by reduced winter mixing induced by climate change. Simulations of pre‐eutrophication conditions and future climate scenarios define safe operating spaces for the lake to thrive without severe hypoxia risk. Complete winter mixing and O2 recharge once every 3 yr can compensate the oxygen demand in Lake Geneva, even when exceeding 1.5 g O2 m−2 d−1. However, when complete winter mixing becomes less frequent, even consumption rates similar to those observed before eutrophication can cause persistent hypoxia, posing a significant threat to the survival of hypolimnetic aquatic life. |
| format | Article |
| id | doaj-art-f955c25605df4fd981e5aaaefe2adb6c |
| institution | Kabale University |
| issn | 2378-2242 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Wiley |
| record_format | Article |
| series | Limnology and Oceanography Letters |
| spelling | doaj-art-f955c25605df4fd981e5aaaefe2adb6c2025-01-21T13:51:57ZengWileyLimnology and Oceanography Letters2378-22422025-02-0110111312110.1002/lol2.10435Unraveling Lake Geneva's hypoxia crisis in the AnthropoceneLaura M. V. Soares0Olivia Desgué‐Itier1Cécilia Barouillet2Céline Casenave3Isabelle Domaizon4Victor Frossard5Nelson G. Hairston Jr.6Andrea Lami7Bruno J. Lemaire8Georges‐Marie Saulnier9Frédéric Soulignac10Brigitte Vinçon‐Leite11Jean‐Philippe Jenny12Université Savoie Mont Blanc, INRAE, CARRTEL Thonon‐les‐Bains FranceUniversité Savoie Mont Blanc, INRAE, CARRTEL Thonon‐les‐Bains FranceUniversité Savoie Mont Blanc, INRAE, CARRTEL Thonon‐les‐Bains FranceUniversité Montpellier, INRAE, MISTEA, Institut Agro Montpellier FranceUniversité Savoie Mont Blanc, INRAE, CARRTEL Thonon‐les‐Bains FranceUniversité Savoie Mont Blanc, INRAE, CARRTEL Thonon‐les‐Bains FranceDepartment of Ecology and Evolutionary Biology Cornell University Ithaca New York USAWater Research Institute, IRSA, CNR Verbania ItalyUniversité Paris‐Saclay, INRAE, HYCAR Antony FranceUniversité Savoie Mont Blanc, CNRS, EDYTEM Le Bourget‐du‐Lac FranceCIPEL Nyon SwitzerlandLaboratoire Eau, Environnement, Systèmes Urbains (LEESU), École Nationale des Ponts et Chaussées Marne‐la‐Vallée FranceUniversité Savoie Mont Blanc, INRAE, CARRTEL Thonon‐les‐Bains FranceAbstract Despite global evidence of lake deoxygenation, its duration, timing, and impacts over decadal to centennial timescales remain uncertain. This study introduces a novel model approach using 150 yr of limnological and paleolimnological data to evaluate the anthropogenic impacts on deep oxygen in Lake Geneva. Results highlight an increase in oxygen consumption rates due to cultural eutrophication, initially triggering historical hypoxia, subsequently exacerbated by reduced winter mixing induced by climate change. Simulations of pre‐eutrophication conditions and future climate scenarios define safe operating spaces for the lake to thrive without severe hypoxia risk. Complete winter mixing and O2 recharge once every 3 yr can compensate the oxygen demand in Lake Geneva, even when exceeding 1.5 g O2 m−2 d−1. However, when complete winter mixing becomes less frequent, even consumption rates similar to those observed before eutrophication can cause persistent hypoxia, posing a significant threat to the survival of hypolimnetic aquatic life.https://doi.org/10.1002/lol2.10435 |
| spellingShingle | Laura M. V. Soares Olivia Desgué‐Itier Cécilia Barouillet Céline Casenave Isabelle Domaizon Victor Frossard Nelson G. Hairston Jr. Andrea Lami Bruno J. Lemaire Georges‐Marie Saulnier Frédéric Soulignac Brigitte Vinçon‐Leite Jean‐Philippe Jenny Unraveling Lake Geneva's hypoxia crisis in the Anthropocene Limnology and Oceanography Letters |
| title | Unraveling Lake Geneva's hypoxia crisis in the Anthropocene |
| title_full | Unraveling Lake Geneva's hypoxia crisis in the Anthropocene |
| title_fullStr | Unraveling Lake Geneva's hypoxia crisis in the Anthropocene |
| title_full_unstemmed | Unraveling Lake Geneva's hypoxia crisis in the Anthropocene |
| title_short | Unraveling Lake Geneva's hypoxia crisis in the Anthropocene |
| title_sort | unraveling lake geneva s hypoxia crisis in the anthropocene |
| url | https://doi.org/10.1002/lol2.10435 |
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