Denitrification and the controlling factors in Yunnan Plateau Lakes (China): Exploring the role of enhanced internal nitrogen cycling by algal blooms

Wu, Sifeng; Wu, Zhen; Liang, Zhongyao; Liu, Yong; Wang, Yilin

doi:10.1016/j.jes.2018.05.028

Cited by 26 publications

(11 citation statements)

References 72 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Generally, lower oxygen content was required for denitrifi cation. Therefore, high organic concentration will create a favorable environment for denitrifi cation (Knowles, 1982;Lee and Rittmanm, 2003;Wu et al, 2019). In the present study, the abundance of nirS gene decreased signifi cantly with the organic carbon consumption, indicating the potential weakening of denitrifi cation ability because of the continuous utilization of organic carbon of lake surface sediment by bacteria.…”

Section: Eff Ects Of Organic Carbon Consumption On Denitrifying Bactementioning

confidence: 49%

Effects of organic carbon consumption on denitrifier community composition and diversity along dissolved oxygen vertical profiles in lake sediment surface

et al. 2019

View full text Add to dashboard Cite

At present, the understanding of the dynamics of denitrifi ers at diff erent dissolved oxygen (DO) layers under organic carbon consumption within the surface sediments remains inadequate. In this study, high-throughput sequencing and quantitative PCR targeting nirS gene were used to analyze the denitrifi er abundance dynamics, community composition, and structure for aerobic (DO 0.5-6.9 mg/L), hypoxic-anoxic (DO 0-0.5 mg/L), and anoxic (DO 0 mg/L) layers in surface sediments under organic carbon consumption. Based on the analysis of nirS gene abundance, the values of denitrifying bacteria decreased with organic carbon consumption at diff erent DO layers. When the bacterial species abundance at the genus level were compared between the high-carbon and low-carbon sediments, there was signifi cant increase in 6 out of 36, 7 out of 36 and 6 out of 36 genera respectively for the aerobic, hypoxic-anoxic and anoxic layers. On the other hand, 14 out of 36, 9 out of 36 and 15 out of 36 genera showed signifi cant decrease in bacterial species abundance respectively for the aerobic, hypoxic-anoxic and anoxic layers. Additionally, 14 out of 36, 20 out of 36, and 15 out of 36 genera had no change in bacterial species abundance respectively for the aerobic, hypoxic-anoxic, and anoxic layers. This indicates that the carbon utilization ability of diff erent denitrifi ers on each DO layers was generally diff erent from each other. Diversity of denitrifying bacteria also presented signifi cant diff erences in diff erent DO layers between the high-and low-carbon content sediment layers. Moreover, under the high-carbon and low-carbon content, the abundance of nirS gene showed a high peak within the hypoxic-anoxic regions, suggesting that this region might be the main distribution area for the denitrifying bacteria within the surface sediments. Furthermore, community of unique denitrifi ers occurred in diff erent DO layers and the adaptive changes of the denitrifi er community followed the organic carbon consumption.

show abstract

Section: Eff Ects Of Organic Carbon Consumption On Denitrifying Bactementioning

confidence: 49%

Effects of organic carbon consumption on denitrifier community composition and diversity along dissolved oxygen vertical profiles in lake sediment surface

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Wu et al (2019) found that algal blooms could accelerate the nitrogen cycling rate. Our results showed that there was no dramatic divergence in the potential for N-cycle processes between the eutrophic and the mesotrophic-oligotrophic freshwater ecosystems, but there were some noteworthy differences in anammox, denitrification and nitrogen fixation.…”

Section: Discussionmentioning

confidence: 99%

“…Our results showed that there was no dramatic divergence in the potential for N-cycle processes between the eutrophic and the mesotrophic-oligotrophic freshwater ecosystems, but there were some noteworthy differences in anammox, denitrification and nitrogen fixation. Rich organic matter produced by algal blooms can be converted into ammonia and nitrate for anammox and denitrification (Wu et al, 2019). Hence, we infer that there are high potentials for these two processes in eutrophic ecosystems, which may be the result of an accelerated N-cycle within this ecosystem.…”

Section: Discussionmentioning

confidence: 99%

“…The plateau lake ecosystems are vulnerable and not easily restored once damaged because of the relatively low rate of water exchange and resilience, and the steep and little-developed lakeshores (Wang and Dong, 1998; Liao et al, 2016). In the past few decades, some of these lakes have been seriously damaged by intensification of human activities, leading to deterioration of water quality and degradation of ecosystem function (Li W. et al, 2017; Liu et al, 2017; Gao et al, 2018; Wu et al, 2019). Eutrophication is one of the biggest of such challenges; it changes the diversity and composition of lake organisms and poses a serious threat to ecosystem service function (Liu et al, 2012; Shi et al, 2016; Dong et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Trophic Status Is Associated With Community Structure and Metabolic Potential of Planktonic Microbiota in Plateau Lakes

Shen

Ren

et al. 2019

Front. Microbiol.

View full text Add to dashboard Cite

Microbes in various aquatic ecosystems play a key role in global energy fluxes and biogeochemical processes. However, the detailed patterns on the functional structure and the metabolic potential of microbial communities in freshwater lakes with different trophic status remain to be understood. We employed a metagenomics workflow to analyze the correlations between trophic status and planktonic microbiota in freshwater lakes on Yun-Gui Plateau, China. Our results revealed that microbial communities in the eutrophic and mesotrophic-oligotrophic lake ecosystems harbor distinct community structure and metabolic potential. Cyanobacteria were dominant in the eutrophic ecosystems, mainly driving the processes of aerobic respiration, fermentation, nitrogen assimilation, nitrogen mineralization, assimilatory sulfate reduction and sulfur mineralization in this ecosystem group. Actinobacteria, Proteobacteria (Alpha-, Beta-, and Gammaproteobacteria), Verrucomicrobia and Planctomycetes, occurred more often in the mesotrophic-oligotrophic ecosystems than those in the eutrophic ecosystems, and these taxa potentially mediate the above metabolic processes. In these two groups of ecosystems, a difference in the abundance of functional genes involved in carbohydrate metabolism, energy metabolism, glycan biosynthesis and metabolism, and metabolism of cofactors and vitamins significantly contribute to the distinct functional structure of microbiota from surface water. Furthermore, the microbe-mediated metabolic potentials for carbon, nitrogen and sulfur transformation showed differences in the two ecosystem groups. Compared with the mesotrophic-oligotrophic ecosystems, planktonic microbial communities in the eutrophic ecosystems showed higher potential for aerobic carbon fixation, fermentation, methanogenesis, anammox, denitrification, and sulfur mineralization, but they showed lower potential for aerobic respiration, CO oxidation, nitrogen fixation, and assimilatory sulfate reduction. This study offers insights into the relationships of trophic status to planktonic microbial community structure and its metabolic potential, and identifies the main taxa responsible for the biogeochemical cycles of carbon, nitrogen and sulfur in freshwater lake environments.

show abstract

“…In diverse ecosystems, this processes counteract environmentally, it was applied to reduce nitrogen values in wastewater treatment plants. Various researches influences the essence of methods: autotrophic nitrification in microorganisms [4]; environmental of denitrification and nitrate/nitrite ammonification [5]; factors controlling denitrification [6]; aspects of denitrification in sediment and soil [7]; investigations for functional genes and phylogenetic of denitrification and nitrification [8]; molecular basis and cell biology of denitrification [9]; enzymology of ammonia oxidation [10]; enzymology of the nitrogen cycle [11]; aquaculture and nitrifying bacteria [12]; dissimilatory nitrate reductases in microbe [13]; anaerobic ammonia oxidation [14]; inorganic nitrogen metabolism in bacteria [15]; and nitrogen cycling in aquatic ecosystems [16]. The function of microbial communities in freshwater environments was significant in determining the composition [17], presented the diversity of microbial communities and distribution [18].…”

Section: Introductionmentioning

confidence: 99%

Molecular techniques applied to investigations of abundance of the ammonia oxidizing bacteria and ammonia oxidizing archaea microorganisms in the environment

Ginawi

Yunjun²

2019

IJAAS

View full text Add to dashboard Cite

<p>This review shows regards of the recently experienced concerning the environments of ammonia oxidizing bacteria (AOB), ammonia oxidizing archaea (AOA) microorganisms, and denitrifying microbes. The advancements of molecular biology techniques have encouraged staggeringly to the fast recent developments in the sector. Various methods for implementing so are discussed. The function of AOB, AOA, and denitrifying microorganism composition was investigated through a high throughput of the 16S rRNA amplicon sequencing protocol. There is potential to observe the specific species appearance of these microorganisms in each environment and get to the evaluated relative abundance of several kinds. There is information indicated which the structure of denitrifying and nitrifying group was monitored field to significant fluctuations and the complexes, together in space and in time. More effort is required to enhance and isolate those microorganisms that common of the progressions and to function them through the compound of molecular techniques, biochemical and physiological. However, the investigation with deoxyribonucleic acid (DNA), antibodies, and the polymerase chain reaction (PCR) was preferred mainly to report the composition of chemolithoautotrophic bacteria, surveys of their characteristics in environmental that needed quantification at the transcriptional level is presently not available.</p>

show abstract

Denitrification and the controlling factors in Yunnan Plateau Lakes (China): Exploring the role of enhanced internal nitrogen cycling by algal blooms

Cited by 26 publications

References 72 publications

Effects of organic carbon consumption on denitrifier community composition and diversity along dissolved oxygen vertical profiles in lake sediment surface

Effects of organic carbon consumption on denitrifier community composition and diversity along dissolved oxygen vertical profiles in lake sediment surface

Trophic Status Is Associated With Community Structure and Metabolic Potential of Planktonic Microbiota in Plateau Lakes

Molecular techniques applied to investigations of abundance of the ammonia oxidizing bacteria and ammonia oxidizing archaea microorganisms in the environment

Contact Info

Product

Resources

About