Vertical distribution of bacteria and their relation to algal biomass in the high arctic sea ice from the Barents Sea and Laptev Sea

ZHANG Qing; TANG Xue-xi; ZHOU Qing-song; ZENG Jiang-ning; Rolf Gradinger

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Article Navigation > Haiyang Xuebao > 2003 > 25(6): 106-116

ZHANG Qing, TANG Xue-xi, ZHOU Qing-song, ZENG Jiang-ning, Rolf Gradinger. Vertical distribution of bacteria and their relation to algal biomass in the high arctic sea ice from the Barents Sea and Laptev Sea[J]. Haiyang Xuebao, 2003, 25(6): 106-116.

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Vertical distribution of bacteria and their relation to algal biomass in the high arctic sea ice from the Barents Sea and Laptev Sea

1.
College of Marine Biology Science, Ocean University of China, Qingdao 266003, China;Laboratory of Ocean Dynamic Processes and Satellite Oceanography of State Oceanic Administration, Hangzhou 310012, China;Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
2.
College of Marine Biology Science, Ocean University of China, Qingdao 266003, China
3.
Laboratory of Ocean Dynamic Processes and Satellite Oceanography of State Oceanic Administration, Hangzhou 310012, China;Second Institute of Oceanography, State Oceanic Administration, Hangzhou 310012, China
4.
Institute of Marine Science, University of Alaska, Fairbanks, AK 99775-7220, USA

Received Date: 2002-10-18
Rev Recd Date: 2003-12-05

Abstract

Abstract

The vertical distribution of bacterial abundance and biomass were investigated in relation to algal biomass in ice cores taken from drifting ice floes in two arctic shelf areas: the Barents Sea and the Laptev Sea.The individual size and carbon content of a single sea ice bacterium was determined by means of image analysis.Bacteria were not evenly distributed but occurred in dense layers.At least two different types of distribution patterns were found with either a single maximum inside or at the bottom of the ice floe or two maxima in different parts of the floes.Bacterial concentrations range from 0.4×10⁵ to 36.7×10⁵ cells/cm³.The individual cell size exhibits consider able variations between the ice floes.In a multi-year ice floe, the largest bacteria were observed in relation to an internal chlorophyll a maximum, while no vertical changes were found in first-year ice floe.Total bacterial biomass (C) for the entire ice cores ranges from 19.2 to 79.2 mg/cm² and the ratio of bacterum to ice algal biomass from 0.43 to 10.00.A comparison with data collected from fast ice reveals large differences in cell size, abundance and biomass.Based on these comparisons limitations in the metho dological approaches used in current sea ice research are analyzed and a standardized sampling scheme for sea ice cores is proposed.
- Arctic,
- Barents Sea,
- Laptev Sea,
- sea ice,
- bacteria,
- biomass

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