Organic carbon quantity and composition jointly modulate the differentiation of nitrate reduction pathways in sediments of the Chinese eutrophic lake, Lake Chaohu

Gao, Junkai; Liu, Guanglong; Li, Xiaowen; Tang, Mengjuan; Cao, Xiuyun; Zhou, Yiyong; Song, Changchun

doi:10.1016/j.watres.2022.118720

Cited by 12 publications

(6 citation statements)

References 36 publications

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“…This may be explained in two ways. On the one hand, Microcystis blooms generally occurred in summer whereas Dolichospermum dominated in other seasons in Lake Chaohu . N 2 -fixing, which can affect N/P ratios in water columns, could be negligible in summer.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, PNRs were significantly and negatively correlated with DIN/SRP in interstitial water, especially in summer (Figure ), which could regulate the TN/TP in the water column further. Another seasonal field investigation shows that both denitrification and anaerobic ammonia oxidation (Anammox) activities were higher in summer and WLC than those of other seasons and ELC, respectively, in Lake Chaohu . Thus, pronounced sediment nitrification may couple denitrification or Anammox by supplying substrates and then stimulate N removal.…”

Section: Resultsmentioning

confidence: 99%

“…On the one hand, Microcystis blooms generally occurred in summer whereas Dolichospermum dominated in other seasons in Lake Chaohu. 43 N 2 -fixing, which can affect N/P ratios in water columns, could be negligible in summer. On the other hand, sediment activities of P release and N loss were more powerful during the algal blooms driven by the algal degradation, which can contribute to regime shift of nutrient limitations in water columns.…”

Section: Resultsmentioning

confidence: 99%

“…Another seasonal field investigation shows that both denitrification and anaerobic ammonia oxidation (Anammox) activities were higher in summer and WLC than those of other seasons and ELC, respectively, in Lake Chaohu. 43 Thus, pronounced sediment nitrification may couple denitrification or Anammox by supplying substrates and then stimulate N removal. Nitrification was strengthened during eutrophication and contributed to the N deficiency in turn in Lake Chaohu.…”

Section: Regulation Of Sediment Nitrification On Variations Of N and ...mentioning

confidence: 99%

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Interactions between Phosphorus Enrichment and Nitrification Accelerate Relative Nitrogen Deficiency during Cyanobacterial Blooms in a Large Shallow Eutrophic Lake

Zhou

Liu

Wang

et al. 2023

Environ. Sci. Technol.

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Regime shifts between nitrogen (N) and phosphorus (P) limitation, which trigger cyanobacterial succession, occur in shallow eutrophic lakes seasonally. However, the underlying mechanism is not yet fully illustrated. We provide a novel insight to address this from interactions between sediment P and nitrification through monthly field investigations including 204 samples and microcosm experiments in Lake Chaohu. Total N to P mass ratios (TN/TP) varied significantly across seasons especially during algal bloom in summer, with the average value being 26.1 in June and descending to 7.8 in September gradually, triggering dominant cyanobacterial succession from Microcystis to Dolichospermum. The regulation effect of sediment N/P on water column TN/TP was stronger in summer than in other seasons. Iron-bound P and alkaline phosphatase activity in sediment, rather than ammonium, contributed to the higher part of nitrification. Furthermore, our microcosm experiments confirmed that soluble active P and enzymatic hydrolysis of organic P, accumulating during algal bloom, fueled nitrifiers and nitrification in sediments. These processes promoted lake N removal and led to relative N deficiency in turn. Our results highlight that N and P cycles do not exist independently but rather interact with each other during lake eutrophication, supporting the dual N and P reduction program to mitigate eutrophication in shallow eutrophic lakes.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Regulation Of Sediment Nitrification On Variations Of N and ...mentioning

confidence: 99%

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Interactions between Phosphorus Enrichment and Nitrification Accelerate Relative Nitrogen Deficiency during Cyanobacterial Blooms in a Large Shallow Eutrophic Lake

Zhou

Liu

Wang

et al. 2023

Environ. Sci. Technol.

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“…The inter-lake variability of DNRA was mainly explained by environmental factors, including sediment OC and Fe 2+ content, pH, texture, and altitude. Sediment OC content had a positive effect on the DNRA rate: possibly explained by its role as electron donor for the reduction of NO 3 − -N or NO 2 − -N during the period of fermentative DNRA (Burgin & Hamilton, 2007;Gao et al, 2022).…”

Section: − -N Reduction Processesmentioning

confidence: 99%

Patterns and drivers of anaerobic nitrogen transformations in sediments of thermokarst lakes

Mao

Song

Peng

et al. 2023

Global Change Biology

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Significant attention has been given to the way in which the soil nitrogen (N) cycle responds to permafrost thaw in recent years, yet little is known about anaerobic N transformations in thermokarst lakes, which account for more than one‐third of thermokarst landforms across permafrost regions. Based on the N isotope dilution and tracing technique, combined with qPCR and high‐throughput sequencing, we presented large‐scale measurements of anaerobic N transformations of sediments across 30 thermokarst lakes over the Tibetan alpine permafrost region. Our results showed that gross N mineralization, ammonium immobilization, and dissimilatory nitrate reduction rates in thermokarst lakes were higher in the eastern part of our study area than in the west. Denitrification dominated in the dissimilatory nitrate reduction processes, being two and one orders of magnitude higher than anaerobic ammonium oxidation (anammox) and dissimilatory nitrate reduction to ammonium (DNRA), respectively. The abundances of the dissimilatory nitrate reduction genes (nirK, nirS, hzsB, and nrfA) exhibited patterns consistent with sediment N transformation rates, while α diversity did not. The inter‐lake variability in gross N mineralization and ammonium immobilization was dominantly driven by microbial biomass, while the variability in anammox and DNRA was driven by substrate supply and organic carbon content, respectively. Denitrification was jointly affected by nirS abundance and organic carbon content. Overall, the patterns and drivers of anaerobic N transformation rates detected in this study provide a new perspective on potential N release, retention, and removal upon the formation and development of thermokarst lakes.

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Simultaneous deep removal of nitrate and tetrabromobisphenol A in microbial electrochemical system-constructed wetland

Lin,

Li,

Chen

et al. 2025

Bioresource Technology

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Organic carbon quantity and composition jointly modulate the differentiation of nitrate reduction pathways in sediments of the Chinese eutrophic lake, Lake Chaohu

Cited by 12 publications

References 36 publications

Interactions between Phosphorus Enrichment and Nitrification Accelerate Relative Nitrogen Deficiency during Cyanobacterial Blooms in a Large Shallow Eutrophic Lake

Interactions between Phosphorus Enrichment and Nitrification Accelerate Relative Nitrogen Deficiency during Cyanobacterial Blooms in a Large Shallow Eutrophic Lake

Patterns and drivers of anaerobic nitrogen transformations in sediments of thermokarst lakes

Simultaneous deep removal of nitrate and tetrabromobisphenol A in microbial electrochemical system-constructed wetland

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