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

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

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

【DOI】10.3724/SP.J.1085.2012.00225

【作者】 于培松; 张海生; 扈传昱; 卢冰

【Author】 Yu Peisong ; Zhang Haisheng ; Hu Chuanyu ; Lu Bing

【期刊】极地研究

【Journal】Advances in Polar Science

【期刊年份】2012

【卷】23

【期】4

【关键词】 Prydz Bay, Antarctic, sediment, biomarker, phytoplankton biomass

【Keywords】 Prydz Bay, Antarctic, sediment, biomarker, phytoplankton biomass

【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 ariation 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.

【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 ariation 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.

【基金/项目】 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

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