Bacterial community and eutrophic index analysis of the East Lake

Ji, Bin; Liang, Jiechao; Ma, Yingqun; Zhu, Lin; Liu, Yu

doi:10.1016/j.envpol.2019.05.138

Cited by 48 publications

(15 citation statements)

References 30 publications

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“…). The water quality of the first three sublakes was better than that of the last two sublakes (Ji et al ). Sediments around the lake have been polluted by domestic sewage and nonpoint sources, whereas sediments in the centre of the lake were less disturbed by humans.…”

Section: Methodsmentioning

confidence: 99%

Diversity and abundance of comammox bacteria in the sediments of an urban lake

Xu¹,

Lü

Liu³

et al. 2020

J Appl Microbiol

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Aims Although comammox have been discovered in a variety of ecosystems, there are few studies in urban lakes. This paper attempted to confirm whether this ammonia‐oxidizing microbe exists in urban lakes and to determine the factors influencing its existence. Methods and Results This study investigated the diversity and abundance of comammox bacteria in sediments of a typical urban lake in China, and their ecological relationship with other ammonia‐oxidizing micro‐organisms. The phylogenetic analysis indicated that comammox clade A existed in the sediment of Lake Donghu, and the comammox bacteria co‐existed with ammonia‐oxidizing archaea (AOA), ammonia‐oxidizing bacteria (AOB) and anaerobic ammonia‐oxidizing (anammox) bacteria in the sediment of this lake. The abundances of the ammonia monooxygenase subunit A (amoA) genes for comammox, AOA, AOB and anammox 16S rRNA were 2·43 × 108, 1·07 × 108, 3·24 × 107 and 3·21 × 1011 copies per gram dry sediment respectively. Moreover, the amoA gene abundance of comammox was positively correlated with that of AOA and AOB. The redundancy analysis showed that the abundance of the comammox amoA gene was negatively correlated with the concentration of main indicators for nitrogen status in both the sediment and the water column, indicating that eutrophication may inhibit the growth of comammox bacteria. Conclusions Comammox bacteria play an important ecological role in the nitrogen cycle of urban lake sediments. Significance and Impact of the Study Our results indicated comammox bacteria were widespread in urban lakes and eutrophication may inhibit their growth.

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Section: Methodsmentioning

confidence: 99%

Diversity and abundance of comammox bacteria in the sediments of an urban lake

Xu¹,

Lü

Liu³

et al. 2020

J Appl Microbiol

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“…Marine microbial communities play a fundamental role in the biogeochemical cycles of elements (Ji et al, 2019;Sonthiphand et al, 2019), food web structure, and energy ow (Li et al, 2019). Understanding the mechanism of bacterial community assembly is one of the most critical objectives of microbial ecology.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Depth and Season on Microbial Community Dynamics of the Black Sea

Öztürk

Altınok

Feyzioglu

et al. 2021

Preprint

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The Black Sea is a unique environment having a thin layer of oxic-zone above and anoxic-zone below. Seasonal, vertical, and horizontal microbial assemblages were studied in terms of diversity, abundance, community structure using NGS of the 16S rRNA gene. Total of 750 bacteria species from 23 different phyla were identified. The number of species richness increased from the surface to deeper zones. Although microbial community compositions between sampling stations were similar, microbial community compositions were significantly different vertically between zones. Community compositions of the seawater and sediment were also significantly different. Community composition at 5 meters in summer was significantly different from other seasons, while remaining depths appeared similar. Species of nitrite-oxidizing, sulfate-reducing, thiosulfate reducing, Iron-reducing, Fe-Mn reducing and electricity-producing bacteria were reported for the first time in the Black Sea. Proteobacteria dominated all the sampling depths. Proteobacteria, Cyanobacteria, Bacteroidetes, and Verrucomicrobia were present in the whole water column, while Nitrospinae, Chloroflexi, and Kiritimatiellaeota were restricted, appearing abundant at 75 meters and deeper layers. Vertical microbial community composition variation is attributable to environmental factors and their adaptations to the various ecological niches.

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“…As shown in Figure 6 , BEI and temperature were the most significant parameters for shaping the bacterial communities of lake water, reflected by the length of the arrow-lines. Indeed, BEI can be a feasible bacterial index for eutrophic assessment of freshwater lakes [ 28 ], which is significantly impacted by temperature [ 29 ]. This can be ascribed to the abundance of aquatic bacteria (e.g., cyanobacteria) that can reflect the water quality of lakes, which is impacted by the temperature.…”

Section: Resultsmentioning

confidence: 99%

“…Bacterial eutrophic index (BEI) can be determined as follows [ 28 ]:

where Cyano-A and Actino-A were the relative abundance of Cyanobacteria and Actinobacteria , respectively. The respective relative abundances of Cyanobacteria and Actinobacteria were derived from Miseq sequencing.…”

Section: Methodsmentioning

confidence: 99%

Seasonal Succession of Bacterial Communities in Three Eutrophic Freshwater Lakes

Liu

Liang

et al. 2021

IJERPH

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Urban freshwater lakes play an indispensable role in maintaining the urban environment and are suffering great threats of eutrophication. Until now, little has been known about the seasonal bacterial communities of the surface water of adjacent freshwater urban lakes. This study reported the bacterial communities of three adjacent freshwater lakes (i.e., Tangxun Lake, Yezhi Lake and Nan Lake) during the alternation of seasons. Nan Lake had the best water quality among the three lakes as reflected by the bacterial eutrophic index (BEI), bacterial indicator (Luteolibacter) and functional prediction analysis. It was found that Alphaproteobacteria had the lowest abundance in summer and the highest abundance in winter. Bacteroidetes had the lowest abundance in winter, while Planctomycetes had the highest abundance in summer. N/P ratio appeared to have some relationships with eutrophication. Tangxun Lake and Nan Lake with higher average N/P ratios (e.g., N/P = 20) tended to have a higher BEI in summer at a water temperature of 27 °C, while Yezhi Lake with a relatively lower average N/P ratio (e.g., N/P = 14) tended to have a higher BEI in spring and autumn at a water temperature of 9–20 °C. BEI and water temperature were identified as the key parameters in determining the bacterial communities of lake water. Phosphorus seemed to have slightly more impact on the bacterial communities than nitrogen. It is expected that this study will help to gain more knowledge on urban lake eutrophication.

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Bacterial community and eutrophic index analysis of the East Lake

Cited by 48 publications

References 30 publications

Diversity and abundance of comammox bacteria in the sediments of an urban lake

Diversity and abundance of comammox bacteria in the sediments of an urban lake

Influence of the Depth and Season on Microbial Community Dynamics of the Black Sea

Seasonal Succession of Bacterial Communities in Three Eutrophic Freshwater Lakes

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