동중국해와 동해에서 초미세시아노박테리아 다양성의 계절적 변동

Title
동중국해와 동해에서 초미세시아노박테리아 다양성의 계절적 변동
Alternative Title
Seasonal variations of picocyanobacterial diversity in the East China Sea and the East Sea
Author(s)
최동한; 노재훈
KIOST Author(s)
Choi, Dong Han(최동한)
Alternative Author(s)
최동한; 노재훈
Publication Year
2009-05-28
Abstract
Unicellular cyanobacteria Synechococcus and Prochlorococcus are ubiquitously distributed in huge numbers and dominant contributors to primary production and biomass in vast area of world's oceans. However, there are few data on their diversity in the western Pacific Ocean including the East China Sea and the East Sea. In this study, cyanobacterial diversity based on clone libraries of 16S-23S rRNA ITS (internal transcribed spacer) sequences was investigated to understand their seasonal variations and to elucidate factors influencing their distribution in the East China Sea (ECS) and the East Sea (ES). Samples were collected from surface and subsurface chlorophyll maximum depths and clone library was constructed after pooling DNA from the two depths of each station. Samples were obtained in April, June, August and October 2008 and February 2009 in the ECS and in April 2006, December 2007, February, March, August and October 2008 in the ES. In total, 1595 clone sequences were obtained in the study. Among them, 1499 clones were affiliated with Synechococcus (94%). Prochlorococcus and other cyanobacterial sequences accounted only for 5% and 0.3%, respectively. Thus, Synechococcus are dominant picocyanobacteria in the ECS and the ES. Among Synechococcus sequences, clades I, II and IV were dominant ones appearing in high percentages (average 75%) in the studied area. In the ECS and the ES, clades I and IV were dominant (51-100%) in spring and early summer. In autumn, clade II showed relatively low dominance (45-65%) in both areas. However, distribution patterns of these clades were also different among stations. In addition, the other distinct 17 Synechococcus clades, of which 7 were novel clades not previously designated, were found in this study. But, their occurrences were changed with time and space, and most of clades appeared to be in low percentage below 10% except clades XVIII and two novel clades in sub-cluster 5.1 and clades in sub-cluster 5.3. Prochloroco
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/41147
Bibliographic Citation
한국해양과학기술협의회 공동학술대회, pp.95, 2009
Publisher
한국해양과학기술협의회
Type
Conference
Language
English
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