The distribution and concentration of particulate biogenic silica in surface waters of Prydz Bay, Antarctica, during the austral summer of 2011  

作　　者：HU Chuanyu SHEN Chen ZHANG Haisheng 

机构地区：[1]Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration(SOA) [2]Second Institute of Oceanography, SOA

出　　处：《Advances in Polar Science》2012年第4期211-216,共6页极地科学进展（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant no. 41076134 and 41206182);the Scientific Research Fund of the Second Institute of Oceanography, SOA (Grant nos.JT1009, JT1208, JG1217 and JG1218);the Chinese Polar Environment Comprehensive Investigation & Assessment Programmes (Grant nos. CHINARE 2012-01-04 and CHINARE 2012-04-04);the SOA Young Marine Science Foundation (Grant no. 2012536)

摘　　要：The concentrations and distributions of particulate biogenic silica （PBSi） in the upper surface waters of Prydz Bay, Antarctica, were investigated during the 27th Chinese National Antarctic Research Expedition cruises of January 2011. We aimed to characterize the correlations between PBSi and plankton, nutrients and particulate organic carbon. The results showed that the concentrations of biogenic silica ranged from 0.76--19.72 ktmol-dm3 and the average concentration of biogenic silica was 6.06 mol.dm3. The distribution of surface PBSi had significant regional characteristics： The concentrations were higher south of 67S than to the north. The distribution of PBSi, chlorophyll a and particulate organic carbon showed similar patterns, and PBSi distribution had a negative correlation with that of silicate. In the vertical direction, the mole ratio of PBSi and POC （Si/Co） decreased with increasing depth. This trend indicated a higher rate of PBSi dissolution, or a lower rate of organic matter reminer- alization rate, in the upper 200 m.The concentrations and distributions of particulate biogenic silica （PBSi） in the upper surface waters of Prydz Bay, Antarctica, were investigated during the 27th Chinese National Antarctic Research Expedition cruises of January 2011. We aimed to characterize the correlations between PBSi and plankton, nutrients and particulate organic carbon. The results showed that the concentrations of biogenic silica ranged from 0.76--19.72 ktmol-dm3 and the average concentration of biogenic silica was 6.06 mol.dm3. The distribution of surface PBSi had significant regional characteristics： The concentrations were higher south of 67S than to the north. The distribution of PBSi, chlorophyll a and particulate organic carbon showed similar patterns, and PBSi distribution had a negative correlation with that of silicate. In the vertical direction, the mole ratio of PBSi and POC （Si/Co） decreased with increasing depth. This trend indicated a higher rate of PBSi dissolution, or a lower rate of organic matter reminer- alization rate, in the upper 200 m.

关 键 词：biogenic silica PARTICLE PHYTOPLANKTON particulate organic carbon Prydz Bay 

分 类 号：P941.61[天文地球—自然地理学] P342