ArticleCurrent microbiology2023
The Effects of Shaking Duration on the Abundance and the Community of Aerobic Denitrifying Bacteria in Shrimp Pond Water and Sediment Samples.
Article in Current microbiology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
With the rapid development of intensive aquaculture, the considerable release of nitrogenous organic compounds has become a serious threat to aquatic organisms. Currently, isolating autochthonous aerobic denitrifying bacteria (ADB) from aquaculture environments is essential for the biological elimination of nitrogenous pollutants. In this study, the enrichment of ADB from shrimp pond water and sediment samples was conducted under different shaking durations. The absolute abundance of total bacteria, nosZ-type, and the napA-type ADB was measured using qPCR. High-throughput sequencing of 16S rRNA, nosZ, and napA genes was performed to reveal the community structure of bacteria and ADB, respectively. Our data revealed that absolute abundance and the community structure of the total bacteria, nosZ-type and napA-type ADB, were significantly altered under different shaking durations. Specifically, the order Pseudomonadales, possessing both nosZ and napA genes, was significantly enriched in water and sediment samples under both 12/12 and 24/0 shaking/static cycles. However, in water samples, compared to the 24/0 shaking/static cycles, the 12/12 shaking/static cycles could lead to a higher enrichment rate of aerobic denitrification bacteria indicated by the higher absolute abundance of bacteria and the higher accounting percentage of orders Oceanospirillales and Vibrionales. Moreover, although the order Pseudomonadales notably increased under the 12/12 of shake/static cycle compared to the 24/0 shaking/static cycle, considering the relative higher abundance of ADB in 24/0 shaking/static cycle, the enrichment of ADB in sediment may be efficient with the 24/0 shaking/static cycle.
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