| Title | Widespread deoxygenation of temperate lakes |
| Abstract | The concentration of dissolved oxygen in aquatic systems helps to regulate biodiversity, nutrient biogeochemistry, greenhouse gas emissions, and the quality of drinking water. The long-term declines in dissolved oxygen concentrations in coastal and ocean waters have been linked to climate warming and human activity, but little is known about the changes in dissolved oxygen concentrations in lakes. Although the solubility of dissolved oxygen decreases with increasing water temperatures, long-term lake trajectories are difficult to predict. Oxygen losses in warming lakes may be amplified by enhanced decomposition and stronger thermal stratification or oxygen may increase as a result of enhanced primary production. Here we analyse a combined total of 45,148 dissolved oxygen and temperature profiles and calculate trends for 393 temperate lakes that span 1941 to 2017. We find that a decline in dissolved oxygen is widespread in surface and deep-water habitats. The decline in surface waters is primarily associated with reduced solubility under warmer water temperatures, although dissolved oxygen in surface waters increased in a subset of highly productive warming lakes, probably owing to increasing production of phytoplankton. By contrast, the decline in deep waters is associated with stronger thermal stratification and loss of water clarity, but not with changes in gas solubility. Our results suggest that climate change and declining water clarity have altered the physical and chemical environment of lakes. Declines in dissolved oxygen in freshwater are 2.75 to 9.3 times greater than observed in the world's oceans and could threaten essential lake ecosystem services. |
| Source | Nature (Lond.) 594 (7861), pp. 66–70 |
| Keywords | dissolved oxygenclimate changewater temperaturestratificationwater clarity |
| Journal | Nature (Lond.) |
| Editor | Macmillan, London, Regno Unito |
| Year | 2021 |
| Type | Articolo in rivista |
| DOI | 10.1038/s41586-021-03550-y |
| Authors | Jane, Stephen F.; Hansen, Gretchen J.A.; Kraemer, Benjamin M.; Leavitt, Peter R.; Mincer, Joshua L.; North, Rebecca L.; Pilla, Rachel M.; Stetler, Jonathan T.; Williamson, Craig E.; Woolway, R. Iestyn; Arvola, Lauri; Chandra, Sudeep; DeGasperi, Curtis L.; Diemer, Laura; Dunalska, Julita; Erina, Oxana; Flaim, Giovanna; Grossart, Hans Peter; Hambright, K. David; Hein, Catherine; Hejzlar, Josef; Janus, Lorraine L.; Jenny, Jean Philippe; Jones, John R.; Knoll, Lesley B.; Leoni, Barbara; Mackay, Eleanor; Matsuzaki, Shin Ichiro S.; McBride, Chris; Müller-Navarra, Dörthe C.; Paterson, Andrew M.; Pierson, Don; Rogora, Michela; Rusak, James A.; Sadro, Steven; Saulnier-Talbot, Emilie; Schmid, Martin; Sommaruga, Ruben; Thiery, Wim; Verburg, Piet; Weathers, Kathleen C.; Weyhenmeyer, Gesa A.; Yokota, Kiyoko; Rose, Kevin C. |
| Text | 455824 2021 10.1038/s41586 021 03550 y Scopus 2 s2.0 85107151997 dissolved oxygen climate change water temperature stratification water clarity Widespread deoxygenation of temperate lakes Jane, Stephen F.; Hansen, Gretchen J.A.; Kraemer, Benjamin M.; Leavitt, Peter R.; Mincer, Joshua L.; North, Rebecca L.; Pilla, Rachel M.; Stetler, Jonathan T.; Williamson, Craig E.; Woolway, R. Iestyn; Arvola, Lauri; Chandra, Sudeep; DeGasperi, Curtis L.; Diemer, Laura; Dunalska, Julita; Erina, Oxana; Flaim, Giovanna; Grossart, Hans Peter; Hambright, K. David; Hein, Catherine; Hejzlar, Josef; Janus, Lorraine L.; Jenny, Jean Philippe; Jones, John R.; Knoll, Lesley B.; Leoni, Barbara; Mackay, Eleanor; Matsuzaki, Shin Ichiro S.; McBride, Chris; Muller Navarra, Dorthe C.; Paterson, Andrew M.; Pierson, Don; Rogora, Michela; Rusak, James A.; Sadro, Steven; Saulnier Talbot, Emilie; Schmid, Martin; Sommaruga, Ruben; Thiery, Wim; Verburg, Piet; Weathers, Kathleen C.; Weyhenmeyer, Gesa A.; Yokota, Kiyoko; Rose, Kevin C. Institute of Environmental Change amp; Society; New York City Department of Environmental Protection; Istituto Agrario San Michele all Adige; Institute of Hydrobiology, Biology Centre of the Academy of Sciences of the Czech Republic; Miami University; Universite Laval; Leibniz Institute of Freshwater Ecology and Inland Fisheries; National Institute for Environmental Studies of Japan; University of Oklahoma; Queen s University Belfast; University of Minnesota Twin Cities; Universitat Hamburg; Vrije Universiteit Brussel; Uniwersytet Gdanski; ETH Zurich; Rensselaer Polytechnic Institute; National Institute of Water and Atmospheric Research, New Zealand; Uniwersytet Warminsko Mazurski w Olsztynie; Universitat Potsdam; SUNY Oneonta; Consiglio Nazionale delle Ricerche; Universite Savoie Mont Blanc; Wisconsin Department Natural Resources; Institute of Ecosystem Studies; Dundalk Institute of Technology; University of California, Davis; Universita degli Studi di Milano Bicocca; Universitat Innsbruck; Ontario Ministry of the Environment; Lomonosov Moscow State University; University of Missouri; UK Centre for Ecology amp; Hydrology; Uppsala Universitet; Helsingin Yliopisto; Eawag Swiss Federal Institute of Aquatic Science and Technology; University of Nevada, Reno; FB Environmental Associates; Environmental Research Institute; DIDCOT; King County Water and Land Resources Division The concentration of dissolved oxygen in aquatic systems helps to regulate biodiversity, nutrient biogeochemistry, greenhouse gas emissions, and the quality of drinking water. The long term declines in dissolved oxygen concentrations in coastal and ocean waters have been linked to climate warming and human activity, but little is known about the changes in dissolved oxygen concentrations in lakes. Although the solubility of dissolved oxygen decreases with increasing water temperatures, long term lake trajectories are difficult to predict. Oxygen losses in warming lakes may be amplified by enhanced decomposition and stronger thermal stratification or oxygen may increase as a result of enhanced primary production. Here we analyse a combined total of 45,148 dissolved oxygen and temperature profiles and calculate trends for 393 temperate lakes that span 1941 to 2017. We find that a decline in dissolved oxygen is widespread in surface and deep water habitats. The decline in surface waters is primarily associated with reduced solubility under warmer water temperatures, although dissolved oxygen in surface waters increased in a subset of highly productive warming lakes, probably owing to increasing production of phytoplankton. By contrast, the decline in deep waters is associated with stronger thermal stratification and loss of water clarity, but not with changes in gas solubility. Our results suggest that climate change and declining water clarity have altered the physical and chemical environment of lakes. Declines in dissolved oxygen in freshwater are 2.75 to 9.3 times greater than observed in the world s oceans and could threaten essential lake ecosystem services. 594 Published version http //www.scopus.com/record/display.url eid=2 s2.0 85107151997 origin=inward Widespread deoxygenation of temperate lakes Published version s41586 021 03550 y.pdf Articolo in rivista Macmillan 0028 0836 Nature Lond. Nature Lond. Nature Lond. Nature Lond. michela.rogora ROGORA MICHELA |
