极地研究

极地研究 ›› 2014, Vol. 26 ›› Issue (3): 300-305.DOI: 10.13679/j.jdyj.2014.2.300

• 研究论文 • 上一篇    下一篇

南极普里兹湾表层沉积物中生物钡的含量与分布

谭赛章 于培松 扈传昱 韩正兵 张海生   

  1. 国家海洋局第二海洋研究所，国家海洋局海洋生态系统与生物地球化学重点实验室, 浙江 杭州 310012
  • 收稿日期:2012-12-06 修回日期:2013-03-13 出版日期:2014-09-30 发布日期:2014-09-30
  • 通讯作者: 张海生
  • 基金资助:

    南极普里兹湾近现代海洋生产和碳沉积记录及其对全球气候变化的响应;南大洋普里兹湾生物硅的生产、溶解、沉降及其保存机制研究

BIOGENIC BARIUM IN SURFACE SEDIMENTS OF PRYDZ BAY, ANTARCTICA

TAN Saizhang, YU Peisong, HU Chuanyu, HAN Zhengbing, ZHANG Haisheng   

  1. Second Institute of Oceanography, Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration, Hangzhou 310012, China
  • Received:2012-12-06 Revised:2013-03-13 Online:2014-09-30 Published:2014-09-30

PDF (PC)

1354

被引次数

2

摘要： 利用中国南极科考21和27航次采集的普里兹湾表层沉积物样品，分析了其中BBa的含量及分布特征，并讨论了控制其分布的相关因素。结果表明：分别利用直接扣除法和分步萃取法获得的BBa含量差别较大，直接扣除法获得的含量明显的高于分步萃取法，这是因为扣除法获得BBa中包含了大量的非生源钡，比如与样品中含砂量有密切联系的铁锰氧化物结合态钡，从而导致在该海域采用直接扣除法缺乏合理性。分步萃取法获得表层沉积物中BBa含量为104-445μg?g-1，平均值为227μg?g-1，呈现明显的空间分布差异，整体分布趋势为湾中心区域较高，浅滩及冰缘区较低。表层沉积物样品中BBa的含量及分布与BSi、OC以及上层水体的叶绿素a和初级生产力情况密切相关，说明上层水体的生物生产状况是BBa分布的主要控制因素。

关键词: 生物钡, 沉积物, 普里兹湾, 南极

Abstract: We used the normative calculation and sequential extraction methods to determine the concentration of biogenic barium, and compared the results of the two methods. The concentration of biogenic barium calculated using the normative calculation method was much higher than the result from sequential extraction, which suggested that barium associated with Mn and Fe oxides contributed considerably to total barium. The concentration of biogenic barium based on sequential extraction ranged from 104 to 445 μg·g−1, with an average content of 227 μg·g−1. The highest levels of biogenic barium were recorded in the center the bay, where the seawater is more stable, and lower values were found near the shore and over the ice shelf. Biogenic barium concentration showed a significant linear correlation with BSi and OC, and was also closely correlated to chlorophyll a concentration. This finding indicates that primary productivity of phytoplankton in the surface water column is the main environmental factor regulating the concentration and distribution of biogenic barium in Prydz Bay.

Key words: biogenic barium, sediment, Prydz Bay, Antarctic