Water Quality and Diversity of Denitrifier Community Structure of Typical Scenic Water Bodies in Xi'an
Six micro-polluted landscape water bodies were selected to explore the relationship between water quality and the nirS-Type denitrifier community structure and diversity with an Illumina high-throughput sequencing technique. The results of a physico-chemical analysis of the water bodies showed that the Fengqing Park (FQ) and Laodong Park (LD) water bodies were classified as inferior V water quality, the Qujiang Park (QJ), Mutasi Park (MTS), and Xinjiyuan Park (XJY) water bodies were classified as V water quality, and the Yongyang Park (YY) water quality was classified as Ⅳ. The TN values varied from 1. 21 mg·L - 1 to 6. 50 mg·L - 1 , with the lowest value found in YY and the highest in FQ ( P < 0. 05). TP was significantly higher in LD (0. 10 mg·L - 1 ) and significantly lower in QJ [0. 02 mg·L - 1 (P < 0. 05)]. The NH +4 -N in LD was 4. 44 times higher than that in QJ and FQ (P < 0. 01). Illumina high-throughput sequencing revealed that the denitrifier community composition was significantly different among the six water bodies, and Paracoccus sp. , Pseudomonas sp. , and Rubriυiυax sp. were the dominant genus species. A principle component analysis (PCA) indicated that the nirS-Type denitrifier communities of XJY and MTS were mainly regulated by NH +4 -N and the permanganate index, LD and FQ were significantly influenced by NO -3 -N, NO -2 -N, TN, TP, and DO, and YY was significantly influenced by pH value. Our results showed that nirS-Type denitrifier communities were regulated by different water quality indicators.
scenic waterwater qualitynirS-Type denitrifier communityIllumina high throughput sequence
NETL
NSTL
万方数据
维普
