Atmospheric deposition and river runoff stimulate the utilization of dissolved organic phosphorus in coastal seas

Jin, Haoyu, Zhang, Chao, Meng, Siyu, Wang, Qin, Ding, Xiaokun, Meng, Ling, Zhuang, Yunyun, Yao, Xiaohong, Gao, Yang, Shi, Feng, Mock, Thomas ORCID: and Gao, Huiwang (2024) Atmospheric deposition and river runoff stimulate the utilization of dissolved organic phosphorus in coastal seas. Nature Communications, 15. ISSN 2041-1723

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In coastal seas, the role of atmospheric deposition and river runoff in dissolved organic phosphorus (DOP) utilization is not well understood. Here, we address this knowledge gap by combining microcosm experiments with a global approach considering the relationship between the activity of alkaline phosphatases and changes in phytoplankton biomass in relation to the concentration of dissolved inorganic phosphorus (DIP). Our results suggest that the addition of aerosols and riverine water stimulate the biological utilization of DOP in coastal seas primarily by depleting DIP due to increasing nitrogen concentrations, which enhances phytoplankton growth. This “Anthropogenic Nitrogen Pump” was therefore identified to make DOP an important source of phosphorus for phytoplankton in coastal seas but only when the ratio of chlorophyll a to DIP [Log10 (Chl a / DIP)] is larger than 1.20. Our study therefore suggests that anthropogenic nitrogen input might contribute to the phosphorus cycle in coastal seas.

Item Type: Article
Additional Information: Funding Information: This work was funded by NSFC-Shandong Joint Fund (U1906215), National Key R&D Program of China (2022YFF0803000), National Natural Science Foundation of China (NSFC) (41906119, 41876125, 42176022), Fundamental Research Funds for the Central Universities (202072001). Data and samples for microcosm experiments were collected onboard of R/V “Dongfanghong 2”, R/V “Beidou”, and R/V “Lanhai101” implementing the open research cruise NORC2018-1, NORC2019-1, NORC2020-1, and NORC2023-1 supported by NSFC Shiptime Sharing Project (project number: 41576118, 41849901, 41949901, and 42249901). T.M. acknowledges funding provided by NERC under grant NE/W005654/1 and the School of Environmental Sciences for partial support to supervise Haoyu Jin and to write and edit this paper. Publisher Copyright: © 2024, The Author(s).
Uncontrolled Keywords: chemistry(all),biochemistry, genetics and molecular biology(all),physics and astronomy(all) ,/dk/atira/pure/subjectarea/asjc/1600
Faculty \ School: Faculty of Science > School of Environmental Sciences
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Depositing User: LivePure Connector
Date Deposited: 11 Mar 2024 16:31
Last Modified: 11 Mar 2024 16:31
DOI: 10.1038/s41467-024-44838-7


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