Occurrence and driving forces of different nitrogen forms in the sediments of the grass and algae-type zones of Taihu Lake

Zhao, Zihan; Zhang, Mingli; Tian, Jiaming; Wang, Yanhua

doi:10.1007/s11356-021-17784-w

Cited by 14 publications

(3 citation statements)

References 55 publications

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“…Located in China’s most developed eastern region, the Taihu Lake Basin (TLB) covers only 0.4% of China's land but supports 4.4% of its population and contributes 9.7% of its GDP 35 . The high rates of economic development and intensive agricultural activities have accelerated the deterioration of water quality in the area 36 – 38 . As the lowest part of the basin, Taihu Lake receives a large amount of Nr.…”

Section: Introductionmentioning

confidence: 99%

Attribution and driving force of nitrogen losses from the Taihu Lake Basin by the InVEST and GeoDetector models

Tian

Zhang

et al. 2023

Sci Rep

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Quantifying temporal and spatial changes in reactive nitrogen (Nr) losses from a watershed and exploring its main drivers are the key to watershed water quality improvements. Huge Nr losses continue to threaten the safety of the water environment in the Taihu Lake Basin (TLB). Here, the InVEST and GeoDetector models were combined to estimate Nr losses in the TLB from 1990 to 2020 and explore driving forces. Different scenarios for Nr losses were compared, showing that Nr loss peaked at 181.66 × 103 t in 2000. The key factors affecting Nr loss are land use, followed by elevation, soil, and slope factors, and their mean q-values were 0.82, 0.52, 0.51, and 0.48, respectively. The scenario analysis revealed that Nr losses increased under the business-as-usual and economic development scenarios, while ecological conservation, increased nutrient use efficiency, and reduced nutrient application all contribute to a reduction in Nr losses. The findings provide a scientific reference for Nr loss control and future planning in the TLB.

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Section: Introductionmentioning

confidence: 99%

Attribution and driving force of nitrogen losses from the Taihu Lake Basin by the InVEST and GeoDetector models

Tian

Zhang

et al. 2023

Sci Rep

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“…There is a certain relationship between rainwater quality and urban surface type, and the stormwater runoff in the park has high concentrations of chemical oxygen demand (COD), TN, and TP [23]. Controlling terrestrial N inputs and sediment suspension may be crucial to inhibiting the transition from grass-based to algal lake ecosystems [24]. Determining the thresholds of TP, submerged vegetation cover, and zooplankton size can provide a basis for ecological restoration in small shallow lakes and ponds [25].…”

Section: Introductionmentioning

confidence: 99%

Research on the Algal Density Change Features of Water Bodies in Urban Parks and the Environmental Driving Factors

2022

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Water bodies in urban parks are important for scenic and recreational areas, yet algal bloom problems seriously affect public use; therefore, it is important to study the features of algal density (AD) changes and environmental driving factors (EDFs) for water body management. In this study, five scenic water bodies in urban parks of Xinxiang City are taken as the objects for studying the AD and nine environmental indicators from March to October 2021, in accordance with time-series monitoring. The features of AD change in different layers of the water bodies are analyzed, and the main environmental impact factors of AD changes are screened by Pearson correlation analysis and principal components analysis (PCA), with main EDFs further extracted according to multiple linear regression analysis (MLRA), and multiple regression equation established. According to the data, ADs at different depth layers increase at first and then decrease with time, reaching the peak in August. According to the PCA, three principal components (PCs) are extracted in the 0.5 m and 1.0 m water layer, the variance contribution of which is 87.8% and 87.3%, respectively. The variance contribution of four PCs extracted in the 1.5 m water layer is 81.7%. After MLRA, it is found that the main EDFs of algal density in the 0.5 m water layer are electrical conductivity (EC), dissolved oxygen (DO), and water temperature (WT), in the 1.0 m water layer are WT and DO, and in the 1.5 m water layer are WT, DO, total nitrogen (TN), and EC. Generally speaking, WT and DO are decisive factors affecting AD. The EDFs’ leads to the AD changes in different water layers are analyzed, and it is proved that stratification occurs in scenic water bodies in urban parks. This study is expected to provide basic data and a theoretical basis for ecosystem system protection and water quality management of scenic water bodies in urban parks.

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“…The P aq values in the study area varied within the range of 0.18-0.60 (Online Resource 4) with slight uctuations, indicating that the terrigenous derived sources declined and there were more aquatic plants before the 1960s. However, since the 1990s, due to forest restoration and water eutrophication(Zhao et al 2022), the P aq values decreased. However, in the surface layer, due to the decay of aquatic plants and increased algal content, the P aq ratios rose again.According to the source analysis of sedimentary organic materials in the study area, the main contributors of organic pollutants were combustion-derived sources.…”

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confidence: 99%

Responses of burial characteristics of n-alkanes and polycyclic aromatic hydrocarbons in Poyang Lake, China to changes in organic matter inputs from 1886 to 2019

Tian

Chen

Zhao

et al. 2022

Preprint

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The potential influences of the increased anthropogenic stress during the Anthropocene have led to a focus on the sedimentary record in lake and estuary environments. In this study, the spatio-temporal occurrence of 16 polycyclic aromatic hydrocarbons (PAHs) and the n-alkanes from nC12–nC37 associated with organic groups (i.e., organic nitrogen (ON), organic carbon (OC), organic hydrogen (OH), and organic sulfur (OS)) in the 210Pb-dated estuary sediments of Poyang Lake were investigated and their sources and impacts were traced. The ON, OC, OS, and OH contents in the sediment cores ranged between 0.12 − 0.65%, 1 − 7.95%, 0.01 − 0.82%, and 0.03 − 1%, respectively. The age of estuarine sediment cores in Poyang Lake was measured to be 1885–2019 by the 210Pb-dating method. The 133-year sediment deposition occurred over different stages, each with its own characteristics. The PAH fluxes were in the range of 787.65–11269.18 ng cm− 2 a− 1. The high-ring PAHs were dominant, accounting for 74.02% of the total, and the main sources were biomass combustion and automobile exhaust emissions from 1885–2019 without marked change. On a centennial scale, the main n-alkane peaks were nC15, nC31, and nC33, which had an obvious odd-even predominance. The deposition flux of Σn-alkanes varied within the range of 10.33 − 213.86 µg cm− 2 a− 1. The long-chain monomers were dominant, and were found to originate from herbs. The environmental indicator analysis revealed that the restoration of forests and eutrophication of water bodies caused by human activities and a climate change from wet to drought conditions contributed to the relative contribution of autochthonous organisms and vascular plants during 1886–2019.

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Occurrence and driving forces of different nitrogen forms in the sediments of the grass and algae-type zones of Taihu Lake

Cited by 14 publications

References 55 publications

Attribution and driving force of nitrogen losses from the Taihu Lake Basin by the InVEST and GeoDetector models

Attribution and driving force of nitrogen losses from the Taihu Lake Basin by the InVEST and GeoDetector models

Research on the Algal Density Change Features of Water Bodies in Urban Parks and the Environmental Driving Factors

Responses of burial characteristics of n-alkanes and polycyclic aromatic hydrocarbons in Poyang Lake, China to changes in organic matter inputs from 1886 to 2019

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