[Nutrients regeneration speed of sediment in harmful algae blooms (HAB) area of East China Sea].
The fluxes of dissolved nutrients at sediment-water interface were investigated at 4 stations in the HAB area of East China Sea in May 2001 and May 2002. The benthic fluxes of nutrients were determined by incubating the sediment core samples with bottom seawater bubbled with air or nitrogen. The transfer of nutrients was more active under anoxic condition. The fluxes of dissolved nutrients were generally high at the stations close to the coast. The sediment was the source of SiO3(2-), which accounted for 6% of primary production. For DIN and PO4(3-), the sediment was the sink. DIN and PO4(3-) adsorbed by sediment accounted for 5.9% and 67% of the riverine DIN and PO4(3-) inputs, respectively, and the inputs of SiO3(2-) accounted for 7.8%.
College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China. qx-h1980@163.com
Xiao-hong
XH
Qi
Sumei
S
Liu
Jing
J
Zhang
Hongtao
H
Chen
D002681:China; D019015:Geologic Sediments / Q000737:chemistry*; D057097:Harmful Algal Bloom; D009792:Oceans and Seas; D010710:Phosphates / Q000032:analysis*; D012623:Seawater / Q000737:chemistry; D017640:Silicates / Q000032:analysis*
D010710:Phosphates; D017640:Silicates