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首页> 外文期刊>Soil Biology & Biochemistry >Bacterial diversity and occurrence of ammonia-oxidizing bacteria in the Atacama Desert soil during a ' desert bloom' event
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Bacterial diversity and occurrence of ammonia-oxidizing bacteria in the Atacama Desert soil during a ' desert bloom' event

机译：“沙漠开花”事件期间阿塔卡马沙漠土壤中细菌的多样性和氨氧化细菌的发生

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The Atacama Desert, located in northern Chile, is one of the driest deserts on the Earth. However, in some years, short and sporadic rainfall in the southern end of this desert has increased the soil moisture that produces ephemeral "desert bloom". Our goal was to assess the composition of the bacterial community and determine variations in the ammonia-oxidizing bacteria guild diversity from soils collected during the course of the "desert bloom" event. The bacterial composition from this arid soil was determined by cloning and sequencing the 16S rRNA gene. A relatively high diversity of clones belonging to 14 bacterial groups was detected. The ammonia-oxidizers showed a significantly higher diversity of amoA gene clones after the "desert bloom" than during or at the beginning of this event. All sequences obtained were related to Nitrosospira genera and environmental clones. These results suggest that the diversity of ammonia-oxidizing bacteria in this arid soil can be affected by the occurrence of "desert bloom".
机译：位于智利北部的阿塔卡马沙漠是地球上最干燥的沙漠之一。然而，几年来，在该沙漠南端的短暂零星降雨增加了土壤水分，从而产生了短暂的“沙漠开花”。我们的目标是评估细菌群落的组成，并确定在“沙漠开花”事件过程中从土壤中收集的氨氧化细菌协会多样性。通过克隆和测序16S rRNA基因确定了来自该干旱土壤的细菌组成。检测到属于14个细菌组的克隆相对较高的多样性。氨氧化剂在“沙漠开花”之后显示出比该事件期间或开始时更高的amoA基因克隆多样性。获得的所有序列均与亚硝基螺旋体属和环境克隆有关。这些结果表明，该“干旱开花”的发生会影响该干旱土壤中氨氧化细菌的多样性。

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