海洋科学2017，Vol.41Issue(5)：42-49,8.DOI:10.11759/hykx20160917002
渤海表层沉积物中的生物硅
Biogenic silica in the surface sediment of the Bohai Sea
摘要
Abstract
The 103-surface sediment samples collected from the Bohai Sea were extracted by 0.1 mol/LHCl and 1％Na2CO3 sequentially for the analysis of biogenic silica. The results showed that biogenic silica contents were in the range of 7.3～54.7 g/kg, with an average of 31.5 g/kg. The measured contents of the biogenic silica were higher than other reported values in the same study area. This might be the result of different extraction methods that were employed in the studies, the extraction by 0.1 mol/L HCl may dissolve the oxides plaque coated on the biogenic silica in the sediment and therefore increase the release of the biogenic silica. Spatial distributions of the biogenic silica were characterized using geographic information system (GIS) and the spatial heterogeneity of the biogenic silica was observed in the surface sediments of the Bohai Sea. The highest content located along the coastal marine of Hebei province, in contrast to the lowest content located in the Laizhou Bay. This suggested long-term terrestrial input of nutrient substances and frequent disturbance by the input of the Yellow River sediments may govern the abundance and distribution of biogenic silica in this area. Principal component analysis indicated the contents of biogenic silica had a significantly (P < 0.01) positive correlation with the contents of clay, fine sand, total organic nitrogen, and organic carbon in the sediment of the Bohai Sea, which further confirmed the effects of grain size and nutrient substance on the accumulation of biogenic silica in the sediment.关键词
生物硅/分步提取/表层沉积物/渤海Key words
Biogenic silica/Sequential extraction/Surface Sediment/Bohai sea分类
海洋科学引用本文复制引用
代振飞,薛勇,章海波,涂晨,骆永明..渤海表层沉积物中的生物硅[J].海洋科学,2017,41(5):42-49,8.基金项目
中国科学院重点部署项目(KZZD-EW-14) （KZZD-EW-14）
中国科学院战略先导专项(XDA11020402) Key Project of the Chinese Academy of Sciences, No.KZZD-EW-14 （XDA11020402）
Strategic Priority Research Program of the Chinese Academy of Sciences, No. XDA11020402 （）
