Imbalance of global nutrient cycles exacerbated by the greater retention of phosphorus over nitrogen in lakes

Wu, Zhen; Li, Jincheng; Sun, Yanxin; Peñuelas, Josep; Huang, Jilin; Sardans i Galobart, Jordi; Jiang, Qingsong; Finlay, Jacques C.; Britten, Gregory; Follows, Michael J.; Gao, Wei; Qin, Boqiang; Ni, Jinren; Huo, Shouliang; Liu, Yong

doi:10.1038/s41561-022-00958-7

Cita bibliogràfica -- Enllaç permanent: https://ddd.uab.cat/record/299903

Web of Science: 110 cites, Scopus: 124 cites, Google Scholar: cites,

Imbalance of global nutrient cycles exacerbated by the greater retention of phosphorus over nitrogen in lakes
Wu, Zhen

(Peking University. College of Environmental Sciences and Engineering)
Li, Jincheng (Peking University. College of Environmental Sciences and Engineering)
Sun, Yanxin (Peking University. College of Environmental Sciences and Engineering)
Peñuelas, Josep

(Centre de Recerca Ecològica i d'Aplicacions Forestals)
Huang, Jilin (Peking University. College of Environmental Sciences and Engineering)
Sardans i Galobart, Jordi

(Centre de Recerca Ecològica i d'Aplicacions Forestals)
Jiang, Qingsong (Peking University. College of Environmental Sciences and Engineering)
Finlay, Jacques C.

(University of Minnesota. Department of Ecology, Evolution, and Behavior)
Britten, Gregory

(Massachusetts Institute of Technology. Department of Earth, Atmospheric and Planetary Sciences)
Follows, Michael J. (Massachusetts Institute of Technology. Department of Earth, Atmospheric and Planetary Sciences)
Gao, Wei (Guangdong University of Technology. Institute of Environmental and Ecological Engineering)
Qin, Boqiang (Chinese Academy of Sciences. Nanjing Institute of Geography and Limnology)
Ni, Jinren

(Peking University. College of Environmental Sciences and Engineering)
Huo, Shouliang (Chinese Research Academy of Environmental Science (Pequín))
Liu, Yong

(Peking University. College of Environmental Sciences and Engineering)

Data:	2022
Resum:	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.
Ajuts:	Agencia Estatal de Investigación PID2020-115770RB-I00 Agencia Estatal de Investigación PID2019-110521GB-I00
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Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Element cycles ; Environmental impact ; Limnology
Publicat a:	Nature Geoscience, Vol. 15 (June 2022) , p. 464-468, ISSN 1752-0908