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

Yalin, Wu; Huang, Tao; Huang, Changchun; Shen, Yin-Yin; Luo, Yi; Yang, Yu; Li, Ruixiao; Gao, Yan; Zhang, Mingli

doi:10.1007/s11769-018-0994-y

Cited by 18 publications

(10 citation statements)

References 40 publications

(48 reference statements)

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“…8). In addition, the estimates of TN and TP burial in DC based on the regional depth-areas in this study were higher than those of previous studies based on the whole-lake area (Wu et al, 2018) (T-NAR, 8.1 × 10 4 t and T-PAR, 7.2 × 10 4 t, respectively). In other words, our results of T-CAR, T-NAR and T-PAR calculated by multiplying the regional depth-areas using lake are more accurate than that in the single whole-lake area.…”

Section: Total Car Nar and Par In DC And Fxcontrasting

confidence: 89%

“…3). Also, the slopes of the increasing trend in DC were relatively larger than those in FX, with a reception of FX6, which may be due to a rapid increasing rate of nutrients in sediments of DC (Wu et al, 2018). With regard to the temporal distributions of TOC/TN in DC and FX during the past ～150 years, obvious upward trends of TOC/TN were found among these sediment cores of DC (Fig.…”

Section: Comparisons Of Limnological Parameters Between DC and Fxmentioning

confidence: 89%

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Comparison of spatiotemporal carbon, nitrogen, and phosphorus burial in two plateau lacustrine sediments: implication for N and P control

Wang

Xue

Zhang

et al. 2021

Environ Sci Pollut Res

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The long-term accumulation, burial and release of nutrients, such as carbon (C), nitrogen (N) and phosphorus (P) in lacustrine sediments are responsible for the global lake eutrophication. Interpretation of the spatiotemporal sedimentary record of nutrients (C, N and P) in contrasting trophic level of lakes is helpful for understanding the evolutionary process of water eutrophication. Based on the radiochronology of 210 Pbex and 137 Cs, a comparative study of spatial and temporal concentrations, burial of total organic carbon (TOC), total nitrogen (TN) and total phosphorus (TP), the sources of organic matter were conducted using sediment cores from two plateau lakes Dianchi (DC) and Fuxian (FX) of SW China. Results showed that concentrations and burial of C, N and P in sediments of DC, a shallow hypertrophic lake with the maximum depth of 5.8 m, were both higher than those in FX, an oligotrophic deep lake with the maximum depth of 155.0 m. For both lakes the molar ratio of TOC/TN increased in the sediments moving from north to south. The values of TOC/TN molar ratios increased over time in DC and was higher than in FX. The extremely high values of TOC/TN appeared in the central and southern parts of FX, indicating the impacts of accumulation effect and sediment focusing in the deeper region and indirect supplement from the Lake Xingyun (XY), an adjoining lake connected with FX via the Gehe River. Time-integrated sources identification in DC indicated the contribution of allochthonous sources was dominant over the past few decades, which contributed to the increased trophic level of the lake. The comparison of relationships of carbon accumulation rates (CAR), nitrogen accumulation rates (NAR) and phosphorous accumulation rates (PAR), the ratios of N/P and the utilizations of N and P fertilizer between DC and FX implied that both of N and P inputs should be limited for reducing the trophic level, but N control was predominant in comparison with P for both lakes. The results indicated that caution is required in plateau lakes to limit transition from oligotrophic to eutrophic in these lakes.

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Section: Total Car Nar and Par In DC And Fxcontrasting

confidence: 89%

Section: Comparisons Of Limnological Parameters Between DC and Fxmentioning

confidence: 89%

Comparison of spatiotemporal carbon, nitrogen, and phosphorus burial in two plateau lacustrine sediments: implication for N and P control

Wang

Xue

Zhang

et al. 2021

Environ Sci Pollut Res

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“…The sharp decline of Cssw, t in the S4 incubation was quite similar to that of Csw, t in the SW4 incubation, suggesting that the decline in Cssw, t was actually the result of the natural ammonium reduction in SW4. However, the natural reduction of ammonium in the surface water contributed by the highly concentrated RDW discharge required a long time, which was among the major reasons contributing to water eutrophication and black odorous river [8,31,32]. Generally, the Cssw, t value was higher than that of the Csw, t, indicating the source effect of sediments on ammonium in the surface water.…”

Section: Resultsmentioning

confidence: 99%

“…However, the effect of long-term decentralized and centralized RDW discharge on nitrogen pollution in the sediments of small basins remains unknown. Sediments can serve as both a sink and source of nitrogen [8,9]. Notably, sediment release (also as NPS pollution) is another important source for aqueous nitrogen pollution [10,11,12,13,14,15,16].…”

Section: Introductionmentioning

confidence: 99%

“…Much attention has been paid to water bodies in which sediments have been polluted by integrated sources, including both point-source and NPS pollutions [1,11,17,18,19,20]. For example, Dianchi Lake [8], Chaohu Lake [21], and Erhai lake in China [22], and the Mississippi River in the United States [23]. However, the internal loading of nitrogen from sediments that have been chronically contaminated by decentralized and centralized RDW discharge (NPS pollution) in the small basins of rural areas (ponds or wastewater catchments) remains unknown.…”

Section: Introductionmentioning

confidence: 99%

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Characteristics of Internal Ammonium Loading from Long-Term Polluted Sediments by Rural Domestic Wastewater

Luo

et al. 2019

IJERPH

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Given long-term decentralized and centralized rural domestic wastewater (RDW) discharge, nitrogen is continuously depositing in sediments. RDW discharge is assumed to be an important source of ammonium in surface water; however, the effect of long-term RDW discharge on nitrogen pollution in sediments remains unknown. Batch incubations were conducted to investigate the characteristics of internal ammonium loading from long-term polluted sediments by RDW discharge. Four sediments were demonstrated to be heavily polluted by long-term RDW discharge, with total nitrogen (TN) values of 5350, 8080, 2730, and 2000 mg·kg−1, respectively. The internal ammonium release from sediment was a slow and long process, and the risk of ammonium release from sediment during the dry season was significantly greater than that during the wet season. Though all selected sediments were heavily polluted by long-term RDW discharge, the relative contribution of internal ammonium loading from sediments was generally lower than that of external pollution. Hence, dredging is not suggested for RDW-polluted sediments except in response to an emergency. The excessive ammonium in the selected catchment was mainly from untreated and centralized black water in RDW. Centralized black waters in rural communities are highlighted to be separately treated or reused to maintain ammonium content at a safe level.

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Historical changes of phytoplankton community in Fuxian and Dianchi lakes recorded by alkyl diols and sterol biomarkers

Wan

Zhuo

Qiao

et al. 2022

Preprint

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We investigated historical changes in temperature and phytoplankton in Fuxian Lake (FX) and Dianchi Lake (DC), two plateau lakes in Southwest China. We detected sterols and alkyl diols as algal biomarkers (Dinoflagellates, Diatoms, Eustigmatophytes, Cyanobacteria, and Chlorophyta) in the sediment cores by using GC-MS. We characterized sedimentary organic matter (SOM) via C-13 isotope and C/N ratio, and Rock-Eval analysis to obtain total organic carbon (TOC), S2, the hydrogen index (HI), refractory carbon (RC), and nutrient status such as total phosphorus (TP) and total nitrogen (TN) in the sediment cores. The results showed that the sedimentation rates measured by 210 Pb dating ranged from 0.02 to 0.30 g cm -2 yr -1 and 0.07 g cm -2 yr -1 in FX and DC, respectively. The Bayesian isotope mixing model indicated that organic matter from plankton was the main contributor of organic matter in FX and DC and, its contents was gradually increasing . Primary productivity derived from the S2 and HI parameters showed an increasing trend in FX and DC. Cyanobacteria and Chlorophyta were the two dominant phyla in the two lakes. Algal growth was controlled primarily by temperature and nutrient availability. Principal component analysis (PCA) and multiple linear regression analysis showed that the major factors controlling the historical change in phytoplankton growth were TN and temperature in FX and DC. Historical changes in the phytoplankton community in Fuxian andDianchi lakes recorded based on alkyl diols and sterol biomarkers

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

Cited by 18 publications

References 40 publications

Comparison of spatiotemporal carbon, nitrogen, and phosphorus burial in two plateau lacustrine sediments: implication for N and P control

Comparison of spatiotemporal carbon, nitrogen, and phosphorus burial in two plateau lacustrine sediments: implication for N and P control

Characteristics of Internal Ammonium Loading from Long-Term Polluted Sediments by Rural Domestic Wastewater

Historical changes of phytoplankton community in Fuxian and Dianchi lakes recorded by alkyl diols and sterol biomarkers

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