Rapid growth rates of aerobic anoxygenic phototrophs in the ocean

被引:83
|
作者
Koblizek, Michal [1 ]
Masin, Michal
Ras, Josephine
Poulton, Alex J.
Prasil, Ondrej
机构
[1] Inst Microbiol CAS, Trebon 37981, Czech Republic
[2] Inst Phys Biol, Nove Hrady 37333, Czech Republic
[3] Oceanog Lab, F-06238 Villefranche Sur Mer, France
[4] Natl Oceanog Ctr, Southampton SO14 3ZH, Hants, England
基金
英国自然环境研究理事会;
关键词
D O I
10.1111/j.1462-2920.2007.01354.x
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
We analysed bacteriochlorophyll diel changes to assess growth rates of aerobic anoxygenic phototrophs in the euphotic zone across the Atlantic Ocean. The survey performed during Atlantic Meridional Transect cruise 16 has shown that bacteriochlorophyll in the North Atlantic Gyre cycles at rates of 0.91-1.08 day(-1) and in the South Atlantic at rates of 0.72-0.89 day(-1). In contrast, in the more productive equatorial region and North Atlantic it cycled at rates of up to 2.13 day(-1). These results suggest that bacteriochlorophyll-containing bacteria in the euphotic zone of the oligotrophic gyres grow at rates of about one division per day and in the more productive regions up to three divisions per day. This is in striking contrast with the relatively slow growth rates of the total bacterial community. Thus, aerobic anoxygenic phototrophs appear to be a very dynamic part of the marine microbial community and due to their rapid growth, they are likely to be larger sinks for dissolved organic matter than their abundance alone would predict.
引用
收藏
页码:2401 / 2406
页数:6
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