Imbalance of global nutrient cycles exacerbated by the greater retention of phosphorus over nitrogen in lakes. Wu, Z., Li, J., Sun, Y., Peñuelas, J., Huang, J., Sardans, J., Jiang, Q., Finlay, J. C., Britten, G. L., Follows, M. J., Gao, W., Qin, B., Ni, J., Huo, S., & Liu, Y. Nature Geoscience, 15(6):464–468, June, 2022. Number: 6 Publisher: Nature Publishing Group
Imbalance of global nutrient cycles exacerbated by the greater retention of phosphorus over nitrogen in lakes [link]Paper  doi  abstract   bibtex   
Imbalanced anthropogenic inputs of nitrogen (N) and phosphorus (P) have significantly increased the ratio between N and P globally, degrading ecosystem productivity and environmental quality. Lakes represent a large global nutrient sink, modifying the flow of N and P in the environment. It remains unknown, however, the relative retention of these two nutrients in global lakes and their role in the imbalance of the nutrient cycles. Here we compare the ratio between P and N in inflows and outflows of more than 5,000 lakes globally using a combination of nutrient budget model and generalized linear model. We show that over 80% of global lakes positively retain both N and P, and almost 90% of the lakes show preferential retention of P. The greater retention of P over N leads to a strong elevation in the ratios between N and P in the lake outflow, exacerbating the imbalance of N and P cycles unexpectedly and potentially leading to biodiversity losses within lakes and algal blooms in downstream N-limited coastal zones. The management of N or P in controlling lake eutrophication has long been debated. Our results suggest that eutrophication management that prioritizes the reduction of P in lakes—which causes a further decrease in P in outflows—may unintentionally aggravate N/P imbalances in global ecosystems. Our results also highlight the importance of nutrient retention stoichiometry in global lake management to benefit watershed and regional biogeochemical cycles.
@article{wu_imbalance_2022,
	title = {Imbalance of global nutrient cycles exacerbated by the greater retention of phosphorus over nitrogen in lakes},
	volume = {15},
	copyright = {2022 The Author(s), under exclusive licence to Springer Nature Limited},
	issn = {1752-0908},
	url = {https://www.nature.com/articles/s41561-022-00958-7},
	doi = {10.1038/s41561-022-00958-7},
	abstract = {Imbalanced anthropogenic inputs of nitrogen (N) and phosphorus (P) have significantly increased the ratio between N and P globally, degrading ecosystem productivity and environmental quality. Lakes represent a large global nutrient sink, modifying the flow of N and P in the environment. It remains unknown, however, the relative retention of these two nutrients in global lakes and their role in the imbalance of the nutrient cycles. Here we compare the ratio between P and N in inflows and outflows of more than 5,000 lakes globally using a combination of nutrient budget model and generalized linear model. We show that over 80\% of global lakes positively retain both N and P, and almost 90\% of the lakes show preferential retention of P. The greater retention of P over N leads to a strong elevation in the ratios between N and P in the lake outflow, exacerbating the imbalance of N and P cycles unexpectedly and potentially leading to biodiversity losses within lakes and algal blooms in downstream N-limited coastal zones. The management of N or P in controlling lake eutrophication has long been debated. Our results suggest that eutrophication management that prioritizes the reduction of P in lakes—which causes a further decrease in P in outflows—may unintentionally aggravate N/P imbalances in global ecosystems. Our results also highlight the importance of nutrient retention stoichiometry in global lake management to benefit watershed and regional biogeochemical cycles.},
	language = {en},
	number = {6},
	urldate = {2023-06-30},
	journal = {Nature Geoscience},
	author = {Wu, Zhen and Li, Jincheng and Sun, Yanxin and Peñuelas, Josep and Huang, Jilin and Sardans, Jordi and Jiang, Qingsong and Finlay, Jacques C. and Britten, Gregory L. and Follows, Michael J. and Gao, Wei and Qin, Boqiang and Ni, Jinren and Huo, Shouliang and Liu, Yong},
	month = jun,
	year = {2022},
	note = {Number: 6
Publisher: Nature Publishing Group},
	keywords = {Terrestrial Ecoregions (CEC 1997)},
	pages = {464--468},
}

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