期刊
MARINE POLLUTION BULLETIN
卷 129, 期 1, 页码 343-346出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2018.02.051
关键词
Phytoplankton; Concentration factors; Biomagnification; Primary producers
资金
- Kuwait Institute for Scientific Research [EM067C]
- Kuwait Foundation for the Advancement of Sciences [P216-22SP-01]
- IAEA TC Project [KUW7007]
Marine phytoplankton is a primary producer in the ocean that forms the base of the marine food web and supports the pelagic food chain. The two dominant groups of phytoplankton observed in northern Gulf waters are diatoms and dinoflagellates. The diatoms outnumber dinoflagellates in the Gulf waters. This study presents baseline information on the concentration of Po-210 among selected phytoplankton in the northern Gulf. The concentration among diatoms varies between 6.99 and 11.4 Bq kg(-1) wwt, whereas a higher concentration range of 8.51-15.41 Bq kg(-1) wwt was observed among dinoflagellates. The diatoms analyzed includes Thalassiosira spp. -10.2-11.4 Bq kg(-1) wwt; Chaetoceros spp. -6.99-7.14 Bq kg(-1) wwt; Rhizosolenia spp. -9.12-9.95 Bq kg(-1) wwt. The analyzed dinoflagellate genera include Gymnodinium spp. -8.51-8.78 Bq kg(-1) wwt; Noctiluca spp. 15.2-15.4 Bq kg(-1) wwt; and Karenia spp. -14.1-14.9 Bq kg(-1) wwt. The Po-210 concentration in seawater shows a seasonal variation, with a higher concentration range of 0.70 and 0.58 mBq L-1 during summer and autumn, whereas a lower range in concentration of 0.38 and 0.30 mBq L-1 occurring during winter and spring. The resultant computed concentration factors vary between 2*10(4)-5*10(4) demonstrating a significant Po-210 enrichment in the base of the pelagic food chain.
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