Biogeochemistry of dissolved inorganic nutrients in an oligotrophic coastal mariculture region of the northern Shandong Peninsula, north Yellow Sea

MARINE POLLUTION BULLETIN

卷:150

Article

Yang, Bo^1,2  Gao, Xuelu^1,2  Zhao, Jianmin¹  Lu, Yuxi^1,2  Gao, Tianci^1,2 

[1] Chinese Acad Sci, Yantai Inst Coastal Zone Res, CAS Key Lab Coastal Zone Environm Proc & Ecol Rem, Yantai 264003, Shandong, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

关键词: Biogeochemical processes;    Seasonal variations;    Coastal waters;    Eutrophication assessment;    Nutrient budget;   

DOI  :  10.1016/j.marpolbul.2019.110693

来源: Elsevier

【 摘 要 】

Fourteen field cruises were carried out in a mariculture region of the northern Shandong Peninsula, North Yellow Sea, China from 2016 to 2017 for a better understanding of the biogeochemical behaviors, sources and export of dissolved inorganic nutrients. The spatial variations of nutrients were not obvious due to the influence of complex hydrological and biochemical conditions. Potential nutritional level was characterized in oligotrophy, and trophic status was rated at medium level. A preliminary estimation of nutrient budgets demonstrated that the dissolved inorganic nitrogen (DIN) load was mainly from atmospheric deposition and scallop excretion, accounting for 56.9% and 35.6% of its total influx. Scallop excretion and sediment release were the major source of phosphate (DIP), contributing to 25.2% and 44.3%, while dissolved silicon (DSi) was mainly from sediment release, accounting for 94.2%. In addition, about 136.7 x 10(3), 7.3 x 10(3) and 485.5 x 10(3) mol km(-2) yr(-1) of DIN, DIP and DSi could be converted into other forms, e.g. organic and particulate matter and gas species.

【 授权许可】

Free