| 南极乔治王岛与象岛邻近海域表层沉积硅藻组成及分布特征 |
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| 关键词:King George Island Elephant Island surface sediments diatoms sea-ice related species currents |
| 基金项目:自然资源部国家专项(编号: DD20160214);中国地质调查局海洋地质调查计划项目(编号: GZH201100303) |
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| Distribution of Diatom Assemblages in the Surface Sediments near the King George Island and Elephant Island, Antarctica |
| Diatom assemblage and distribution characteristics associated with grain sizes of seven surface sediments in the south of King George Island and west of Elephant Island were analyzed in detail in this study. The results show that diatom abundance and diversity of the south of King George Island are distinctly higher than those of the west of Elephant Island. Site CS22 contains the highest absolute abundance with the value of 1.96×106 valves per gram. The differential distribution of diatom abundance is mainly related to the currents around the South Shetland Islands. Continuous nutrients are brought from the Bellingshausen Sea surface Current along the south side of King George Island, which flourishes the diatom flora in the sites CS19, CS20 and CS22. In contrast, on the west side of Elephant Island, bottom currents derived by the Weddell Sea Gyre may strongly impact the deposition of particles in the sites of CS7, CS9 and CS10. The relative abundance of sea ice-related species reflects the duration of floating sea ice, and the brackish species bloom is possibly related to the side discharge of freshwater. |
| WU Cong,WANG Jin-lian,HE Gao-wen,FU Shao-ying,WANG Li-feng,LAI Pei-xin.2018.Distribution of Diatom Assemblages in the Surface Sediments near the King George Island and Elephant Island, Antarctica[J].Acta Geoscientica Sinica,39(6):657-665. |
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