Responses of heterotrophic bacteria abundance and activity to Asian dust enrichment in the low nutrients and low chlorophyll (LNLC) region of the Northwestern Pacific Ocean

International Symposium on Resource Exploration and Environmental Science

地球科学;生态环境科学

Shi, Dongwan^1 ; Li, Kuiran^1 ; Tian, Yanzhao^2 ; Zhang, Xiaohao^2 ; Bai, Jie^2

College of Marine Life Science, Ocean University of China, Qingdao

266000, China^1

Key Laboratory of Marine Environment and Ecology, Ministry of Education of China, Ocean University of China, Qingdao

266100, China^2

关键词: Co-limitation;    Dust deposition;    Dust deposits;    Heterotrophic bacterias;    Inorganic nitrogen;    Microbial food web;    Microcosm experiments;    Surface ocean;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/64/1/012107/pdf
DOI  :  10.1088/1755-1315/64/1/012107

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Bacteria, as an essential part of microbial food web, play a significant role in the marine ecosystem. Dust deposits into the surface ocean carrying with vital nutrient such as Inorganic nitrogen and phosphorus etc., which has an important influence on the life activities of heterotrophic bacteria. The microcosm experiments with Asian dust deposition was carried out on board in the station K3 (26.18°N, 136.73°E) in April 2015, aiming to estimate the impact of dust deposition on the oligotrophic Northwestern pacific Sea, the main goal of the present paper was to assess how dust deposition events affect the abundance and activity of heterotrophic bacteria in low nutrient and low chlorophyll (LNLC) sea area. Station K3 located in the central northwestern Pacific Ocean, which has the characteristic of low nutrient and low chlorophyll. The study shows that there was an N-P co-limitation in station K3, and the deposition of Asian dust can increase the abundance, and promote the activity of heterotrophic bacteria in the station K3.