Salinity and DOC Influence the Distribution of Free-living and Particle-attached Aerobic Anoxygenic Phototrophic Bacteria in the Qinghai–Tibetan Lakes

2017 ◽  
Vol 35 (3) ◽  
pp. 247-254 ◽  
Author(s):  
Wen Liu ◽  
Hongchen Jiang ◽  
Jian Yang ◽  
Geng Wu
Keyword(s):  
Phototrophic Bacteria ◽  
Anoxygenic Phototrophic Bacteria ◽  
Free Living ◽  
Aerobic Anoxygenic Phototrophic Bacteria

scholarly journals Abundance and Spatial Distribution of Aerobic Anoxygenic Phototrophic Bacteria in Tama River, Japan

Water ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 150
Author(s):  
Yuki Sato-Takabe ◽  
Setsuko Hirose ◽  
Tomoyuki Hori ◽  
Satoshi Hanada
Keyword(s):  
Spatial Distribution ◽  
Phototrophic Bacteria ◽  
Anoxygenic Phototrophic Bacteria ◽  
Epifluorescence Microscopy ◽  
Free Living ◽  
Aerobic Anoxygenic Phototrophic Bacteria ◽  
Riverine Environment ◽  
Global Oceans ◽  
Total Bacteria ◽  
Aggregation Form

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 × 105, 1.5–4.4 × 104 and <3.2 × 104 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.

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