The biogeochemical behavior of dissolved aluminum in the southern Yellow Sea:Influence of the spring phytoplankton bloom  

作　　者：LI FaMing REN JingLing YAN Li LIU SuMei LIU ChengGang ZHOU Feng ZHANG Jing 

机构地区：[1]Key Laboratory of Marine Chemistry Theory and Technology,Ministry of Education,Ocean University of China [2]State Key Laboratory of Satellite Ocean Environment Dynamics,Second Institute of Oceanography,State Oceanic Administration [3]State Key Laboratory of Estuarine and Coastal Research,East China Normal University

出　　处：《Chinese Science Bulletin》2013年第2期238-248,共11页

基　　金：supported by the National Basic Research Program of Science and Technology of China(2011CB409801);the National Natural Science Foundation of China(41176096)

摘　　要：Many recent studies have investigated the nutrient-type profiles of dissolved aluminum(Al) in the ocean.Significant scavenging of dissolved Al can occur during phytoplankton blooms,but the mechanism remains unclear.The distribution of dissolved Al in the southern Yellow Sea(SYS) was investigated in winter and spring 2009.Following measurements at grid stations during the spring sampling cruise,two drifting anchor surveys of more than 100 h were conducted to trace the variation of dissolved Al concentration during the spring phytoplankton bloom(SPB).The concentration of dissolved Al in the SYS decreased from 40 nmol/L in February to 30 nmol/L in March and 10-20 nmol/L in April,while the concentration of Chl a increased from < 2 μg/L in March to > 4 μg/L in April.The concentration of dissolved Al in the SYS decreased significantly with the development of the phytoplankton bloom,which indicated biological scavenging of dissolved Al from water column.The proportion of dissolved Al scavenged from water column by different phytoplankton species differed at the two drifting stations,with greater removal efficiency demonstrated by diatoms than dinoflagellates.Phytoplankton samples collected from the Chl a maximum layer were washed with trace metal clean reagent(oxalate-EDTA-citrate,abbreviate as oxalate solution,Tovar-Sanchez et al.,2003) to enable the surface-scavenged(extracellular) and intracellular Al pools associated with phytoplankton to be differentiated.Thirty-nine to ninetysix percent of the total Al was found to be existed in the interior pools,which indicated that biological absorption was the important way to scavenge dissolved Al during phytoplankton blooms in the SYS.Many recent studies have investigated the nutrient-type profiles of dissolved aluminum （A1） in the ocean. Significant scavenging of dissolved A1 can occur during phytoplankton blooms, but the mechanism remains unclear. The distribution of dissolved A1 in the southern Yellow Sea （SYS） was investigated in winter and spring 2009. Following measurements at grid stations during the spring sampling cruise, two drifting anchor surveys of more than 100 h were conducted to trace the variation of dissolved AI con- centration during the spring phytoplankton bloom （SPB）. The concentration of dissolved A1 in the SYS decreased from 40 nmol/L in February to 30 nmol/L in March and 10-20 nmol/L in April, while the concentration of Chl a increased from 〈 2 ~tg/L in March to 〉 4 I.tg/L in April. The concentration of dissolved A1 in the SYS decreased significantly with the development of the phyto- plankton bloom, which indicated biological scavenging of dissolved A1 from water column. The proportion of dissolved A1 scav- enged from water column by different phytoplankton species differed at the two drifting stations, with greater removal efficiency demonstrated by diatoms than dinoflagellates. Phytoplankton samples collected from the Chl a maximum layer were washed with trace metal clean reagent （oxalate-EDTA-citrate, abbreviate as oxalate solution, Tovar-Sanchez et al., 2003） to enable the sur- face-scavenged （extracellular） and intracellular A1 pools associated with phytoplankton to be differentiated. Thirty-nine to ninetysix percent of the total A1 was found to be existed in the interior pools, which indicated that biological absorption was the important way to scavenge dissolved A1 during phytoplankton blooms in the SYS.

关 键 词：浮游植物 浮游生物 溶解铝 地球化学行为 南黄海 水华 浓度增加 春运期间 

分 类 号：X13[环境科学与工程—环境科学]