极地研究

极地研究 ›› 2017, Vol. 29 ›› Issue (3): 327-337.DOI: 10.13679/j.jdyj.2017.3.327

• 研究论文 • 上一篇    下一篇

南极普里兹湾营养盐分布特征及季节性消耗

陈际雨, 韩正兵, 扈传昱, 孙维萍, 张海生   

  • 收稿日期:2016-03-31 修回日期:2016-06-12 出版日期:2017-09-30 发布日期:2017-09-30
  • 通讯作者: 扈传昱
  • 基金资助:

    国家自然科学基金(41406219, 41306202,41376193)、基本科研业务费专项资金(JT1405, JG1404, JG1313)、南北极环境综合考察与评估专项(CHINARE2016-04-04, 04-01, 01-04)、中国极地科学战略研究基金(20150302)和海洋公益性行业科研专项(201405031-04)资助

Distribution and seasonal depletion of nutrients in Prydz Bay, Antarctica

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#br# 国家海洋局第二海洋研究所, 浙江 杭州 310012   

  • Received:2016-03-31 Revised:2016-06-12 Online:2017-09-30 Published:2017-09-30

PDF (PC)

898

被引次数

3

摘要：

利用中国南极科学考察CHINARE-25/27/29 航次获取的普里兹湾营养盐数据, 对该海域营养盐的含
量分布特征进行了分析, 利用水柱Tmin 层的存在估算了夏季的营养盐消耗量(NNU、NPU 和NSiU), 并对营
养盐的吸收比例及结构做了初步探讨。结果显示, 普里兹湾营养盐空间分布呈现明显的区域特征, 上表层水
营养盐浓度分布表现为冰架边缘区＜陆架区＜深海区的区域性特征。夏季普里兹湾受到浮游植物旺发的影
响, 湾内营养盐(NO3-N、PO4-P 和SiO3-Si)的消耗值相对湾外较高。营养盐吸收比值的变化表明, NSiU/NNU
比值由湾内向湾外呈现升高的特征, 与叶绿素a 具有相反的分布趋势, 推测这一现象与湾内陆架区铁的供
应要高于湾外深海区有关。本文对营养盐结构与变化的探讨, 将有益于进一步深入了解南极普里兹湾各生
源要素的循环过程, 为预测未来南极浮游群落结构的演变提供依据。

关键词: 营养盐, 空间分布特征, 季节性消耗, 吸收比值, 普里兹湾

Abstract:

Nutrient data collected in Prydz Bay during the CHINARE 25/27/29 cruises were analyzed to study the
distribution pattern of nutrient concentrations. The consumption, absorption ratio, and structure of nutrients
(NNU, NPU, and NSiU) in summer were evaluated based on the existence of the Tmin layer. The results
showed that the spatial distributions of nutrient concentrations in the surface waters of Prydz Bay had obvious
regional characteristics. The highest, intermediate, and lowest concentrations of nutrients were observed
in the open sea, continental shelf, and marginal ice shelf areas, respectively. Consumption of nutrients in
inner areas of Prydz Bay was higher than outer areas partly because of the influence of the phytoplankton
bloom in austral summer; a period in which nutrients are absorbed by phytoplankton for photosynthesis. The
NSiU/NNU ratios showed distribution patterns similar to nutrient concentrations but opposite to Chla concentration.
It is speculated that this difference is mainly due to the higher supply of iron in the continental
shelf region and inner Prydz Bay area comparted with the open sea. Investigation of the structure and
changes of nutrient concentrations in Prydz Bay can help us better understand the biogenic element cycle
processes in the Southern Ocean and provide a basis for predicting the evolution of phytoplankton structure
in the Southern Ocean.

Key words: nutrients, spatial distributions, seasonal depletion, remove ratios, Prydz Bay