Perpetual atmospheric dry deposition exacerbates the unbalance of dissolved inorganic nitrogen and phosphorus in coastal waters: A case study on a mariculture site in North China

Lei Xie; Xuelu Gao; Yongliang Liu; Bo Yang; Xiaoqing Lv; Jianmin Zhao

doi:10.1016/j.marpolbul.2021.112866

Perpetual atmospheric dry deposition exacerbates the unbalance of dissolved inorganic nitrogen and phosphorus in coastal waters: A case study on a mariculture site in North China

Mar Pollut Bull. 2021 Nov:172:112866. doi: 10.1016/j.marpolbul.2021.112866. Epub 2021 Sep 3.

Authors

Lei Xie¹, Xuelu Gao², Yongliang Liu¹, Bo Yang³, Xiaoqing Lv¹, Jianmin Zhao³

Affiliations

¹ CAS Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China.
² CAS Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, Shandong 266071, China. Electronic address: xlgao@yic.ac.cn.
³ CAS Key Laboratory of Coastal Zone Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, Shandong 264003, China; University of Chinese Academy of Sciences, Beijing 100049, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, Shandong 266071, China.

PMID: 34523428
DOI: 10.1016/j.marpolbul.2021.112866

Abstract

The monthly magnitudes of dissolvable nutrients through atmospheric dry deposition (ADD) and their ecological effects to the coastal waters around the Yangma Island, North Yellow Sea, were investigated for one year. The results indicated that anthropogenic activities were the major sources of dissolvable inorganic and organic nitrogen (DIN and DON); dust events were the major sources of inorganic phosphorus (DIP) and silicate (DSi); however, organic phosphorus (DOP) could be originated from marine biological activities. The annual ADD fluxes of DIN, DON, DIP, DOP and DSi were 21.8, 2.7, 0.10, 0.30 and 0.73 mmol m^-2 yr^-1, respectively. Overall, the new production supported by the bioavailable nitrogen through ADD in winter was up to 9.14 mg C m^-2 d^-1. Notably, the annual molar ratio of DIN/DIP through ADD was 216 ± 123, which was much higher than that of the dissolved inorganic nitrogen to phosphorus in seawater and might exacerbate their unbalance in some coastal waters.

Keywords: Air-sea process; Biogeochemical characteristics; Ecological effects; Nutrient stoichiometry.

MeSH terms

China
Environmental Monitoring
Nitrogen* / analysis
Phosphorus* / analysis
Seawater

Substances

Phosphorus
Nitrogen