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	2020/01
形態種別	研究論文
査読	査読あり
標題	Abundance and Spatial Distribution of Aerobic Anoxygenic Phototrophic Bacteria in Tama River, Japan
執筆形態	未選択
掲載誌名	WATER
出版社・発行元	MDPI
巻・号・頁	12(1)
担当区分	筆頭著者
著者・共著者	Yuki Sato-Takabe,Setsuko Hirose,Tomoyuki Hori,Satoshi Hanada
概要	Aerobic anoxygenic phototrophic bacteria (AAnPB) are widely distributed and regarded as key players driving the carbon cycle in surface water of global oceans, coastal and estuary areas and in other freshwater environments (e.g., ponds and lakes). However, the abundance and spatial distribution of AAnPB in rivers is much less well-known. Here we investigated the variation of the absolute cell abundances of the total bacteria, AAnPB and cyanobacteria, at four different sites in Tama River, Japan, and the spatial distribution (i.e., free-living or particle-attached existence form) of AAnPB at two out of the four sites using infra-red epifluorescence microscopy. Free-living cell abundances for the total bacteria, AAnPB and cyanobacteria were 1.6-3 x 10(5), 1.5-4.4 x 10(4) and <3.2 x 10(4) cells mL(-1), respectively. The free-living AAnPB accounted for 6.1%-19.6% of the total bacterial abundance in the river. The peaks of the AAnPB and cyanobacteria abundances were found at the same site, suggesting that the AAnPB could potentially coexist with cyanobacteria. Meanwhile, the particle-attached AAnPB were observed at the two sites of the river, accounting for 52.2% of the total bacteria abundance in the particle. Our results showed the existence and aggregation form of AAnPB in the riverine environment.
DOI	10.3390/w12010150
ISSN	/2073-4441