Consistent stoichiometric long-term relationships between nutrients and chlorophyll-a across shallow lakes

Daniel Graeber (), Mark J. McCarthy, Tom Shatwell, Dietrich Borchardt, Erik Jeppesen, Martin Søndergaard, Torben L. Lauridsen and Thomas A. Davidson
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Daniel Graeber: Helmholtz-Centre for Environmental Research - UFZ
Mark J. McCarthy: Estonian University of Life Sciences
Tom Shatwell: Helmholtz-Centre for Environmental Research - UFZ
Dietrich Borchardt: Helmholtz-Centre for Environmental Research - UFZ
Erik Jeppesen: Aarhus University
Martin Søndergaard: Aarhus University
Torben L. Lauridsen: Aarhus University
Thomas A. Davidson: Aarhus University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Aquatic ecosystems are threatened by eutrophication from nutrient pollution. In lakes, eutrophication causes a plethora of deleterious effects, such as harmful algal blooms, fish kills and increased methane emissions. However, lake-specific responses to nutrient changes are highly variable, complicating eutrophication management. These lake-specific responses could result from short-term stochastic drivers overshadowing lake-independent, long-term relationships between phytoplankton and nutrients. Here, we show that strong stoichiometric long-term relationships exist between nutrients and chlorophyll a (Chla) for 5-year simple moving averages (SMA, median R² = 0.87) along a gradient of total nitrogen to total phosphorus (TN:TP) ratios. These stoichiometric relationships are consistent across 159 shallow lakes (defined as average depth

Date: 2024
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DOI: 10.1038/s41467-024-45115-3

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