Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1038/s41467-024-45115-3
Lizenz creative commons licence
Titel (primär) Consistent stoichiometric long-term relationships between nutrients and chlorophyll-a across shallow lakes
Autor Graeber, D.; McCarthy, M.J.; Shatwell, T.; Borchardt, D.; Jeppesen, E.; Søndergaard, M.; Lauridsen, T.L.; Davidson, T.A.
Quelle Nature Communications
Erscheinungsjahr 2024
Department ASAM; SEEFO
Band/Volume 15
Seite von art. 809
Sprache englisch
Topic T5 Future Landscapes
Keywords Ecosystem ecology; Environmental monitoring; Freshwater ecology; Limnology
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  = 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 < 6 m) from a cross-continental, open-access database. We calculate 5-year SMA residuals to assess short-term variability and find substantial short-term Chla variation which is weakly related to nutrient concentrations (median  = 0.12). With shallow lakes representing 89% of the world’s lakes, the identified stoichiometric long-term relationships can globally improve quantitative nutrient management in both lakes and their catchments through a nutrient-ratio-based strategy.
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Graeber, D., McCarthy, M.J., Shatwell, T., Borchardt, D., Jeppesen, E., Søndergaard, M., Lauridsen, T.L., Davidson, T.A. (2024):
Consistent stoichiometric long-term relationships between nutrients and chlorophyll-a across shallow lakes
Nat. Commun. 15 , art. 809 10.1038/s41467-024-45115-3