极地研究

极地研究

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Phytoplankton community changes indicated by biomarker from sediment in Prydz Bay, Antarctica

YU Peisong1,2, ZHANG Haisheng1,2*, HU Chuanyu1,2 & LU Bing1,2   

  1. 1 Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration (SOA), Hangzhou 310012, China;
    2 Second Institute of Oceanography, SOA, Hangzhou 310012, China
  • 出版日期:1962-12-30 发布日期:1962-12-30
  • 通讯作者: ZHANG Haisheng

Phytoplankton community changes indicated by biomarker from sediment in Prydz Bay, Antarctica

YU Peisong1,2, ZHANG Haisheng1,2*, HU Chuanyu1,2 & LU Bing1,2   

  1. 1 Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration (SOA), Hangzhou 310012, China;
    2 Second Institute of Oceanography, SOA, Hangzhou 310012, China
  • Online:1962-12-30 Published:1962-12-30
  • Contact: ZHANG Haisheng

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摘要： Biomarkers including brassicasterol, dinosterol and alkenone in sediments are used as indicators to reconstruct changes to the phytoplankton community in surface and sub-aerial sediments of Prydz Bay, Antarctica. The results indicate that the biomarker records in surface and core sediment samples changed with time and space. The total content of phytoplankton biomarkers ranges from 391.0—1 470.6 ng?g-1. The phytoplankton biomass has increased in Prydz Bay over the past 100 years. This variation may be mainly related with climate change in the region. The total biomarker contents in surface sediments from 5 stations in Prydz Bay are in the range of 215.8—1 294.3 ng?g-1. The phytoplankton biomass in Prydz Bay is higher than that outside of the bay. This is similar to the distributions of chlorophyll a, organic carbon and biogenic silica in surface waters determined through in situ investigation. Such consistency indicates a coupling between the bottom of the ocean and biogeochemical processes in the upper water.

关键词: Prydz Bay, Antarctic, sediment, biomarker, phytoplankton biomass

Abstract: Biomarkers including brassicasterol, dinosterol and alkenone in sediments are used as indicators to reconstruct changes to the phytoplankton community in surface and sub-aerial sediments of Prydz Bay, Antarctica. The results indicate that the biomarker records in surface and core sediment samples changed with time and space. The total content of phytoplankton biomarkers ranges from 391.0—1 470.6 ng?g-1. The phytoplankton biomass has increased in Prydz Bay over the past 100 years. This variation may be mainly related with climate change in the region. The total biomarker contents in surface sediments from 5 stations in Prydz Bay are in the range of 215.8—1 294.3 ng?g-1. The phytoplankton biomass in Prydz Bay is higher than that outside of the bay. This is similar to the distributions of chlorophyll a, organic carbon and biogenic silica in surface waters determined through in situ investigation. Such consistency indicates a coupling between the bottom of the ocean and biogeochemical processes in the upper water.

Key words: Prydz Bay, Antarctic, sediment, biomarker, phytoplankton biomass