The phosphorus release pathways and their mechanisms driven by organic carbon and nitrogen in sediments of eutrophic shallow lakes

Li, Hui; Song, Changchun; Cao, Xiuyun; Zhou, Yiyong

doi:10.1016/j.scitotenv.2016.07.221

Cited by 94 publications

(30 citation statements)

References 67 publications

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“…Matisoff et al (2017) quantified the internal load of nutrients and their bioavailability in Lake Winnipeg, and found higher values in the south basin than the north basin. Additionally, there has been much research on factors influencing the distributions of phosphorus and nitrogen in sediments (Zhong et al, 2008;Xiang and Zhou, 2011;Cong et al, 2014;Li et al, 2016;Puttonen et al, 2016). Eutrophication is becoming a serious issue in China, in particular in Taihu Lake, Chaohu Lake, Erhai Lake, and Dianchi Lake.…”

Section: Introductionmentioning

confidence: 99%

Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China

Yalin

Huang

et al. 2018

Chin. Geogr. Sci.

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Sediments have a significant influence on the cycling of nutrient elements in lake environments. In order to assess the distribution characteristics and estimate the bioavailability of phosphorus and nitrogen in Dianchi Lake, organic and inorganic phosphorus and nitrogen forms were analysed. The 210 Pb radiometric dating method was employed to study temporal changes in the phosphorus and nitrogen pools in Dianchi Lake. The result show that the total phosphorus (TP) and total nitrogen (TN) were both at high concentrations, ranging from 697.5-3210.0 mg/kg and 1263.7-7155.2 mg/kg, respectively. Inorganic phosphorus (IP) and total organic nitrogen (TON) were the main constituents, at percentages of 59%-78% and 74%-95%, respectively, in the sediments. Spatially, there was a decreasing trend in phosphorus and nitrogen contents from the south and north to the lake centre, which is related to the distribution pattern of local economic production. The burial rates of the various phosphorus and nitrogen forms increased in same spatially and over time. Particularly in the past two decades, the burial rates doubled, with that TN reached to 1.287 mg/(cm 2 •yr) in 2014. As the most reactive forms, nitrate nitrogen (NO 3-N) and ammonia nitrogen (NH 4-N) were buried more rapidly in the south region, implying that the potential for releasing sedimentary nitrogen increased from north to south. Based on their concentrations and burial rates, the internal loads of phosphorus and nitrogen were analysed for the last century. A TP pool of 71 597.6 t and a TN pool of 81 191.7 t were estimated for Dianchi Lake. Bioavailable phosphorus and nitrogen pools were also estimated at 44 468.0 t and 5429.7 t, respectively, for the last century.

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Section: Introductionmentioning

confidence: 99%

Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China

Yalin

Huang

et al. 2018

Chin. Geogr. Sci.

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“…This result was further proved by the higher P concentrations in more eutrophic sites, such as QL4-6 and TX1-2 (Table 1 and Figure 2). It was indicated that the enrichment of organic carbon and nitrogen can result in P release through the anaerobic status caused by organic matter decomposition, suggesting a close coupling between carbon and N and P cycles [42]. Also, a hypothesis about mutual coupling and interplay between N and P cycling was presented, based on N loss due to P accumulation and P release due to anoxia, which resulted from organic matter decomposition in the process of eutrophication [36].…”

Section: Discussionmentioning

confidence: 99%

Coupling between Nitrification and Denitrification as well as Its Effect on Phosphorus Release in Sediments of Chinese Shallow Lakes

Zhang

Song

Zhou

et al. 2019

Water

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The coupling of nitrification and denitrification has attracted wide attention since it plays an important role in mitigating eutrophication in aquatic ecosystems. However, the underlying mechanism is largely unknown. In order to study the coupling relationship between nitrification and denitrification, as well as its effect on phosphorus release, nutrient levels, functional gene abundance and potential rates involved in nitrification and denitrification were analyzed in three shallow urban lakes with different nutrient status. Trophic level was found positively related to not only copy numbers of functional genes of nitrosomonas and denitrifiers, but also the potential nitrification and denitrification rates. In addition, the concentrations of different forms of phosphorus showed a positive correlation with the number of nitrosomonas and denitrifiers, as well as potential nitrification and denitrification rates. Furthermore, the number of functional genes of nitrosomonas exhibited positive linear correlations with functional genes and rate of denitrification. These facts suggested that an increase in phosphorus concentration might have promoted the coupling of nitrification and denitrification by increasing their functional genes. Strong nitrification-denitrification fueled the nitrogen removal from the system, and accelerated the phosphorus release due to the anaerobic state caused by organic matter decomposition and nitrification. Moreover, dissolved organic nitrogen was also released into the water column during this process, which was favorable for balancing the nitrogen and phosphorus ratio. In conclusion, the close coupling between nitrification and denitrification mediated by nitrifier denitrification had an important effect on the cycling mode of nitrogen and phosphorus.

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“…The OM contents of the sediments exceeded 10% for all the reservoirs, with the highest average levels observed in the Broa (28 ± 0.99%) and Barra Bonita (24 ± 2.72%) reservoirs, where concentrations exceeded 30% in the dam areas (Table 4). The organic loads that enter the reservoirs can lead to high concentrations of nutrients in sediments (Burger et al 2007;Li et al 2016). Spearman test (with data for all the reservoirs) showed positive correlations (ρ > 0.7) between the phosphorus concentrations in the water and the sediments (ρ = 0.81), as well as between the concentration of phosphorus in the sediment and the trophic state of the water column (ρ = 0.72).…”

Section: Sediment Characterizationmentioning

confidence: 96%

Spatial distribution, bioavailability, and toxicity of metals in surface sediments of tropical reservoirs, Brazil

Frascareli

Cardoso-Silva

Mizael

et al. 2018

Environ Monit Assess

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Depending on the environmental conditions, surface sediments can retain all the contaminants present and provide a record of the anthropic activities affecting the aquatic environment. In order to analyze the impacts on reservoirs, surface sediments were collected in three characteristic regions (riverine, transitional, and limnetic zones) of seven reservoirs in São Paulo State, Brazil. Analyses were made of grain size, organic matter (OM), total phosphorus (TP), and total nitrogen (TN). Inductively coupled plasma-atomic emission spectroscopy (ICP-AES) was used to determine pseudo-total and bioavailable metals (Cu, Cd, Cr, Ni, Pb, Zn, Mn, Fe, and Al). A Horiba probe was used to measure dissolved oxygen (DO), pH, redox potential (ORP), and temperature (Temp) in the bottom water. The data were analyzed using multivariate statistics. Enrichment factors (EF), pollution load index values (PLI), and background values (BG) were also determined in order to evaluate the potential toxicity. Intra-reservoir and inter-reservoir spatial heterogeneity (p < 0.05) were observed using two-way analysis of similarities. Principal component analysis indicated greater influence of metals in the Barra Bonita, Salto Grande, and Rio Grande reservoirs, corroborating the PLI, EF, and BG data. Bioavailable Cu was found in the Rio Grande reservoir, possibly associated with copper sulfate used to control algal blooms, while bioavailable Ni in the Barra Bonita reservoir was attributed to the presence of industrial wastes and natural geology. The bottom water conditions indicated that the metals remained in insoluble forms.

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The phosphorus release pathways and their mechanisms driven by organic carbon and nitrogen in sediments of eutrophic shallow lakes

Cited by 94 publications

References 67 publications

Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China

Internal Loads and Bioavailability of Phosphorus and Nitrogen in Dianchi Lake, China

Coupling between Nitrification and Denitrification as well as Its Effect on Phosphorus Release in Sediments of Chinese Shallow Lakes

Spatial distribution, bioavailability, and toxicity of metals in surface sediments of tropical reservoirs, Brazil

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