Sedimentary record of nutrients and sources of organic matter in the Shuanglong reservoir, Dianchi watershed, China

Zhou, Zike; Wang, Yongping; Liu, Aiju; Wu, Shanshan; Teng, Hao–Wei; Niu, Xiaoyin

doi:10.1007/s11356-020-12085-0

Cited by 9 publications

(2 citation statements)

References 49 publications

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“…The amounts of N and P fertilizer use in DC are both higher than those in FX (Fig. 10), which further indicated that the lake trophic states were both impacted by the utilizations of N and P fertilizer within the catchments of these two lakes, including their affiliated reservoir and rivers (Wang et al, 2015;He et al, 2020;Zhou et al, 2021). This result also implied that nutrients derived from fertilizer use are responsible for the increased trophic states of these two plateau lakes.…”

Section: N and P Control In DC And Fxmentioning

confidence: 87%

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: N and P Control In DC And Fxmentioning

confidence: 87%

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

Self Cite

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“…Organic matter consists of a complex series of mixtures that are widely distributed in sedimentary strata , soil (Zhou et al 2021), water (Pan et al 2017, Valle et al 2020, atmosphere (Kim et al 2013), and organisms. These organisms actively participate in the global material cycle and energy transfer processes.…”

Section: Introductionmentioning

confidence: 99%

Origin and Factors Effecting Dissolved Organic Matter in Karst Spring, Southwest China

Liao

Shen

Sun

et al. 2021

Preprint

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The dissolved biomarker composition of water samples was detected and quantified through gas chromatography-mass spectrometry to investigate the source of organic matter and its influencing factors in a subtropical monsoon karst spring. All water samples were collected in Chongqing, southwest China, in May, June, and July 2015. An analysis of the carbon number distribution characteristics and molecular characteristic parameters indicated that the dissolved organic matter in water samples mainly came from microorganism. The average biomarker contents in the samples were controlled by multi-factor coupling and showed an increasing trend in May, June, and July; this trend was consistent with temperature and inverse with rainfall. Human activities, such as urbanization and land use type, affected the fatty acid composition of the spring water. In forested land, the main fatty acids in water were saturated normal fatty acids with carbon numbers of 14,16, and 18, respectively. The C16:1ω9 (c) fatty acid, denoting the origin of algae, was found in high abundance in the water samples of the Mudu River Basin, which contains agricultural land far from urban areas. C18:1 ω9 (t), a biomarker of Gram-negative bacteria, was detected in large quantities in the cultivated land of the Laolongdong watershed.

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Assessing sediment organic pollution via machine learning models and resource performance

Huang

Gao

Yang

et al. 2022

Bioresource Technology

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Sedimentary record of nutrients and sources of organic matter in the Shuanglong reservoir, Dianchi watershed, China

Cited by 9 publications

References 49 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

Origin and Factors Effecting Dissolved Organic Matter in Karst Spring, Southwest China

Assessing sediment organic pollution via machine learning models and resource performance

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