タカベ　ユキ   TAKABE Yuki   高部 由季    所属   専修大学  経済学部    職種   講師
言語種別	英語
発行・発表の年月	2012/08
形態種別	研究論文
査読	査読あり
標題	Growth and succession patterns of major phylogenetic groups of marine bacteria during a mesocosm diatom bloom
執筆形態	未選択
掲載誌名	JOURNAL OF OCEANOGRAPHY
出版社・発行元	SPRINGER
巻・号・頁	68(4),pp.509-519
著者・共著者	Yuya Tada,Akito Taniguchi,Yuki Sato-Takabe,Koji Hamasaki
概要	Our objective was to track microbial processes associated with serial degradation of organic matter derived from algal blooms. To do this, we analyzed population fluctuations and growth responses of major phylogenetic groups of free-living marine bacteria. We used bromodeoxyuridine immunocytochemistry-fluorescence in situ hybridization methodology to examine marine bacterial community development during and after a diatom bloom in a mesocosm. We revealed that the Roseobacter/Rhodobacter, SAR11, Alteromonas, and Bacteroidetes groups were clearly major phylotypes responsible for most free-living bacterial biomass and production throughout the experiment. The clearest bacterial response was a proliferation of the Alteromonas group (cells with large volumes) during development of the bloom (up to 30 % of actively growing cells). Populations of these bacteria declined sharply thereafter, likely due to grazing. Alteromonas group responses suggest that these bacteria strongly influenced the flux of organic matter at an early bloom stage. The growth potential of Bacteroidetes was relatively large as the bloom peaked; this early development probably contributed to the initial stage of bloom decomposition. In contrast, the contribution of Roseobacter/Rhodobacter to total bacterial production increased at a late stage of decomposing of the bloom. The contributions of Betaproteobacteria, SAR11, and SAR86 groups to total bacterial abundance and production were relatively minor throughout the experiment. These results imply that the ability to utilize organic matter derived from diatoms varies among bacterial phylotypes, and, frequently, less abundant but ecological specialist taxa such as Alteromonas may play major roles in the flux of organic matter during diatom blooms.
DOI	10.1007/s10872-012-0114-z
ISSN	0916-8370