Ammonia adsorption and nitritation in sediments derived from the Three Gorges Reservoir, China

Wang, Hongyuan; Shen, Zhenyao; Guo, Xuejun; Niu, Junfeng; Kang, Bin

doi:10.1007/s12665-009-0299-7

Cited by 19 publications

(14 citation statements)

References 35 publications

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“…Studies suggest that particle association can provide microorganisms with benefits such as protection against predators, enhanced environmental resistance, and increased nutrient availability . Previous research posited that nitrifying microorganisms were attached to particles based on indirect evidence . As expected, the particle concentration experiment showed that ammonia removal rate, NO 2 − + NO 3 − accumulation rate, and abundance of AOA and AOB amoA genes were significantly affected by increasing particle concentration (Table ; Figures a and a).…”

Section: Discussionsupporting

confidence: 53%

Particle‐attached microorganism oxidation of ammonia in a hypereutrophic urban river

Cai

Yao

et al. 2019

J Basic Microbiol

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To elucidate the importance and mechanisms of particle-attached microorganisms on ammonia oxidation, we conducted a controlled simulation experiment with samples collected from the Shunao River, an ammonia-rich hypereutrophic urban river in eastern China. The effects of particle concentration, ammonia concentration, organic carbon source and concentration, dissolved oxygen concentration, and pH were investigated on ammonia transformation rate (ammonia removal rate and NO 2 − + NO 3 − accumulation rate) andabundance of particle-attached ammonia-oxidizing bacteria (AOB) and archaea (AOA). All these factors significantly influenced ammonia transformation rates.Our results provided direct evidence that microorganisms attached on riverine suspended particles were associated with ammonia oxidation. Sequencing revealed that the AOA genus Nitrososphaera, and the AOB genus Nitrosomonas were the most dominant in particle-attached ammonia-oxidizing microbial communities. Further analysis showed that AOB communities had higher species richness and diversity compared with AOA communities. Additionally, AOB amoA genes were~10-100 times more abundant than AOA amoA genes, and AOB abundance was more strongly correlated with ammonia transformation rates than AOA abundance in most experiments, indicating that particleattached AOB were more important than AOA in the hypereutrophic urban river. This study adds to our knowledge of particle-attached microorganism oxidation of ammonia. K E Y W O R D Sammonia-oxidizing archaea, ammonia-oxidizing bacteria, hypereutrophic urban river, suspended particles, water quality

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Section: Discussionsupporting

confidence: 53%

Particle‐attached microorganism oxidation of ammonia in a hypereutrophic urban river

Cai

Yao

et al. 2019

J Basic Microbiol

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“…The positive correlation between TSM and nitrification has been addressed in freshwater systems (Xia et al, 2009;Wang et al, 2010) and in the relatively turbid region of estuaries, where nitrification activities were found to be higher (Berounsky et al, 1993, Helder andDevries, 1983), especially in the zone of estuarine turbidity maxima (Owens, 1986). Moreover, a similar correlation was found in the oxygen minimum zone (Woebken et al, 2007;Galand et al, 2008) though the particulate organic matter (POM) concentration was much lower.…”

Section: Suspended Particlesmentioning

confidence: 89%

“…Recent culture-based and field experiments in freshwater and marine upwelling systems revealed that both ammonia and nitrite oxidizers tend to attach to particles where ammonium adsorption may occur to stimulate nitrification (Xia et al, 2009;Wang et al, 2010;Fussel et al, 2012). One distinctive feature of Asian rivers is that enhanced nutrient fluxes are often accompanied by huge amounts of suspended sediments sourced from soil erosion (Syvitski et al, 2005;Milliman and Syvitski, 1992), resulting in highly turbid coastal and shelf water (e.g., the East China Sea shelf satellite images in Fig.…”

Section: S S-y Hsiao Et Al: Nitrification and Its Oxygen Consumptionmentioning

confidence: 99%

Nitrification and its oxygen consumption along the turbid Chang Jiang River plume

et al. 2014

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Abstract. Nitrification is a series of processes that oxidizes ammonia to nitrate, which contributes to hypoxia development in coastal oceans, especially in eutrophicated regions. The nitrification rate of bulk water (NR b ) and particle free water (NR pf , particle > 3 µm eliminated) were determined along the Chang Jiang River plume in August 2011 by nitrogen isotope tracer technique. Measurements of dissolved oxygen (DO), community respiration rate (CR), nutrients, dissolved organic nitrogen (DON), total suspended matter (TSM), particulate organic carbon/nitrogen (POC / PON), acid-leachable iron and manganese on suspended particles and both archaeal and β-proteobacterial ammonia monooxygenase subunit A gene (amoA) abundance on size-fractioned particles (> 3 µm and 0.22-3 µm) were conducted. The NR b ranged from undetectable up to 4.6 µmol L −1 day −1 , peaking at a salinity of ∼ 29. NR b values were positively correlated with ammonium concentration, suggesting the importance of substrate in nitrification. In the river mouth and the inner plume, NR b was much higher than NR pf , indicating that the nitrifying microorganism is mainly particle associated, which was supported by its significant correlation with amoA gene abundance and TSM concentration. The estimated oxygen demands of nitrification accounted for 0.32 to 318 % of CR, in which 50 % samples demanded more oxygen than that predicted by by the Redfield model (23 %), indicating that oxygen might not be the sole oxidant though DO was sufficient (> 58 µmol kg −1 ) throughout the observation period. The excess nitrification-associated oxygen demand (NOD) showed a tendency to occur at lower DO samples accompanied by higher acid-leachable Fe / Mn, which implied reactive Fe 3+ / Mn 4+ may play a role as oxidant in the nitrification process. Stoichiometric calculation suggested that reactive Fe on particles was 10 times the oxidant demand required to complete ammonia oxidation in the entire plume. The potential involvement of reactive iron and manganese in the nitrification process in oxygenated water further complicated nitrogen cycling in the turbid river plume.

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“…7.6 (Wang et al, 2010) indicated that the seven locations were divided into 2 sets, which was similar to the grouping based on the microbial community construction. The data of these ratios were used to group the aquatic environment using cluster analysis.…”

Section: Fig 75 Distribution Ratios Of Functional Bacteria In Diffementioning

confidence: 78%

“…Table 7.5 shows the average, maximum, minimum number of cells and coefficient of variation (CV) in surface water, bottom water and sediments from the seven locations (Wang et al, 2010). Table 7.5 shows the average, maximum, minimum number of cells and coefficient of variation (CV) in surface water, bottom water and sediments from the seven locations (Wang et al, 2010).…”

Section: Abundance Of Functional Bacteria In Aquatic Environmentsmentioning

confidence: 99%

Eutrophication Risk Assessment

Shen

Niu

Wang

et al. 2013

Advanced Topics in Science and Technology in China

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Eutrophication is commonly considered as one major aspect of global environmental degradation (Nixon, 1995). To protect and manage the water quality, indices are useful tools to communicate with managers because they reduce complex scientific data, integrate different types of information and produce results that can be easily interpreted in the perspective of water quality management (Potapova and Charles, 2007). Many researchers consider that the main reason for the dramatic propagation of algae is the increase in concentration of nutrient materials, such as nitrogen, phosphate, etc. Nonetheless, the relationships between physiochemical and biological factors that impact the growth of algae, such as sunlight, nutrient salts, changes of seasons, water temperature, pH value, and the algae itself, are very complex. It is very hard to forecast the trend in algal growth and to set the eutrophication indicator. A common method was to indicate the water nutrient level using the main representative parameters. The parameters mainly include the concentrations of total phosphate (TP), and total nitrogen (TN), transparency, concentration of chlorophyll a, dissolved oxygen (DO), and so on. According to the parameters, the lakes are divided into different trophic levels, such as poor, middle, eutrophic and so on. The trophic level criterion is different for different countries and different reseachers. Tables 7.1, 7.2 and 7.3 show the trophic level proposed by the United States Environmental Protection Agency and used by Dianchi Lake and East Lake in Wuhan.There also are some other eutrophication standard parameters, such as primary productivity of phytoplankton (Catherine et al., 2008), biomass of phytoplankton (Ho et al., 2008), cell density or numbers of phytoplankton (Dorte et al., 2008), community structure and dominant species (Lorenzo et al., 2008), category composition and dominant species of zooplankton (Toru et al., 2008), numbers of zooplankton, category composition and dominant species of zoobenthos, numbers of bacteria, etc. For different monoids, the methods and standards proposed by different scientists are different. These bio-indicators are not sensitive to changes in aquatic environments and thus are unable to reflect the eutrophic conditions of Distribution and Transformation of Nutrients and

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Ammonia adsorption and nitritation in sediments derived from the Three Gorges Reservoir, China

Cited by 19 publications

References 35 publications

Particle‐attached microorganism oxidation of ammonia in a hypereutrophic urban river

Particle‐attached microorganism oxidation of ammonia in a hypereutrophic urban river

Nitrification and its oxygen consumption along the turbid Chang Jiang River plume

Eutrophication Risk Assessment

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