하계 동중국해 북부 해역에서 초미소남세균의 다양성 및 분포 양상
Picocyanobacterial Diversity and Distribution During Summer in the Northern East China Sea
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In order to understand the spatial distribution of picocyanobacterial diversity during the summer in the northern East China Sea (ECS), their abundance and genetic diversity were investigated using flow cytometry and barcoded amplicon pyrosequencing of 16S-23S internal transcribed spacer sequences. Synechococcus abundance was high, with a range of 0.2 × 105 to 1.8 × 105 cells ml−1. However, Prochlorococcus were found only in the eastern part of the studied area, showing a marked variation among stations [range of n.d. (not detected) to 3.3 × 104 cells ml−1]. Eleven Synechococcus clades and five Prochlorococcus ecotypes were found to have a proportion higher than 1% among picocyanobacterial sequences, indicating high picocyanobacterial diversity in the ECS. The picocyanobacterial compositions were markedly different among stations, as well as among depths. Inflow of the Tsushima Warm Current and Changjiang diluted water was of primary importance in determining picocyanobacterial lineage diversity in the studied area. In addition, light intensity and nutrient conditions also appeared to be important in the vertical and horizontal distribution of picocyanobacterial diversity.
Abstract
In order to understand the spatial distribution of picocyanobacterial diversity during the summer in the northern East China Sea (ECS), their abundance and genetic diversity were investigated using flow cytometry and barcoded amplicon pyrosequencing of 16S-23S internal transcribed spacer sequences. Synechococcus abundance was high, with a range of 0.2 × 105 to 1.8 × 105 cells ml−1. However, Prochlorococcus were found only in the eastern part of the studied area, showing a marked variation among stations [range of n.d. (not detected) to 3.3 × 104 cells ml−1]. Eleven Synechococcus clades and five Prochlorococcus ecotypes were found to have a proportion higher than 1% among picocyanobacterial sequences, indicating high picocyanobacterial diversity in the ECS. The picocyanobacterial compositions were markedly different among stations, as well as among depths. Inflow of the Tsushima Warm Current and Changjiang diluted water was of primary importance in determining picocyanobacterial lineage diversity in the studied area. In addition, light intensity and nutrient conditions also appeared to be important in the vertical and horizontal distribution of picocyanobacterial diversity.
참고문헌 (42)
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