Tracer study of CDOM for nitrogen and phosphorus pollution in the offshore Leizhou Peninsula, China

Wei, Shiyun; Fu, Dongyang; Wang, Difeng; Yu, Guo; Luo, Yi‐Bo; Xu, Huiyao

doi:10.1016/j.ecolind.2023.110019

Cited by 3 publications

(2 citation statements)

References 58 publications

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“…It is very difficult to explain which are more reliable between digital models and field investigations, especially in the complex and changeable Qiongzhou Strait. Our results showed that the DIN content in the Qiongzhou Strait is higher in spring, which is similar to the research conclusions of Wei and others, where the DIN content in spring was higher than that in autumn [24]. A few studies discovered this time distribution rule for DIN in the surrounding sea area of Hainan Island [23,25,26].…”

Section: Hydrodynamic Factors and Artificial Activities Impacting Wat...supporting

confidence: 91%

“…The DIN content on the east side of the strait decreases from east to west and from north to south. In terms of time distribution, different research years, specific sampling times, and analysis methods, such as field surveys and model stimulation, may all cause biases in the time distribution of DIN, such as the opposite results of previous research and this study [18,24,25]. It is very difficult to explain which are more reliable between digital models and field investigations, especially in the complex and changeable Qiongzhou Strait.…”

Section: Hydrodynamic Factors and Artificial Activities Impacting Wat...mentioning

confidence: 64%

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The Impact of Environmental Factors on the Spatiotemporal Heterogeneity of Phytoplankton Community Structure and Biodiversity in the Qiongzhou Strait

Xu,

Ma,

Zhang

et al. 2023

Water

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The distribution and variation in environmental factors and the phytoplankton community in the Qiongzhou Strait were investigated in autumn 2015 and spring 2016. The environmental factors were different in the two seasons, as seen when using one-way ANOVA testing, principal component analysis, and cluster analysis. The temperature and levels of dissolved oxygen and soluble solids were higher in autumn, and the ammonia (NH4-N) level was much higher in spring (4.66 ± 0.97 µmol/L), which led to a higher concentration of dissolved inorganic nitrogen in the northeast area. A total of 118 species of phytoplankton were found, with 47 common species in both seasons and more species in spring. Bacillariophyta (diatom) contributed to over 80% of the relative abundance in both seasons. The species of Chrysophyta and Xanthophyta were endemic species in autumn and spring, respectively. Skeletonema costatum and Chaetoceros curvisetus were the common dominant species, with nine dominant species in both seasons. Higher abundance and biodiversity of phytoplankton appeared in spring, and their differences were mostly determined by NH4-N level, hydrodynamic conditions and artificial activities in the coastal area in the Qiongzhou Strait.

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Section: Hydrodynamic Factors and Artificial Activities Impacting Wat...supporting

confidence: 91%

Section: Hydrodynamic Factors and Artificial Activities Impacting Wat...mentioning

confidence: 64%

The Impact of Environmental Factors on the Spatiotemporal Heterogeneity of Phytoplankton Community Structure and Biodiversity in the Qiongzhou Strait

Xu,

Ma,

Zhang

et al. 2023

Water

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Removal mechanisms and metabolic responses of Chlorella pyrenoidosa to dissolved organic phosphorus

Wu,

Liu,

Jin

et al. 2024

Bioresource Technology

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Environmental capacity and fluxes of land-sourced pollutants around the Leizhou Peninsula in the summer

Chen,

Sun,

Shi

et al. 2023

Front. Mar. Sci.

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Although the water environment has certain self-purification capability, the natural balance is disrupted, leading to water quality deterioration when the discharge load of wastewater exceeds a certain threshold. This problem implies the urgency of evaluating marine environmental capacity as a necessary parameter for marine sustainable development of marine ecosystems. Through principal component analysis (PCA), clustering, and other methods, we analyzed the average concentration and fluxes of land-sourced pollutants and determined the pollution level around the Leizhou Peninsula. Combined with the Delft3D hydrodynamic numerical model, tidal hydrodynamic forces and pollutants migration and diffusion were calculated. Based on in-situ measured data, the model was validated. The sharing rate method was used to calculate the marine environmental capacity in Zhanjiang Bay and analyzed their impact on seawater eutrophication. The results showed that: (1) The average concentrations of chemical oxygen demand (COD), ammonia nitrogen (NH4+), total nitrogen (TN), and total phosphorus (TP) around Leizhou Peninsula were 22.56 mg/L, 0.69 mg/L, 6.69 mg/L, and 0.69 mg/L, respectively. (2) Six areas (Area A-F) can be divided into, based on the discharge of land-sourced pollutants into the sea area. According to the results of PCA, clustering, and other methods, the average concentration and fluxes of land-sourced pollutants in Area B (i.e. Zhanjiang Bay) were very high. (3) The environmental capacity of Zhanjiang Bay was calculated through Delft3D numerical simulation, and it was found that the COD and TN environmental capacity of 6 sewage outlets exceeded the standard, while the TP environmental capacity of 3 sewage outlets exceeded the standard. (4) According to the statistical research result, most of the Zhanjiang Bay waters has been restricted by nitrogen for over a decade. Therefore, we speculate that although TN environmental capacity exceeds the standard, its impact on eutrophication in Zhanjiang Bay is still limited to a certain extent.

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Tracer study of CDOM for nitrogen and phosphorus pollution in the offshore Leizhou Peninsula, China

Cited by 3 publications

References 58 publications

The Impact of Environmental Factors on the Spatiotemporal Heterogeneity of Phytoplankton Community Structure and Biodiversity in the Qiongzhou Strait

The Impact of Environmental Factors on the Spatiotemporal Heterogeneity of Phytoplankton Community Structure and Biodiversity in the Qiongzhou Strait

Removal mechanisms and metabolic responses of Chlorella pyrenoidosa to dissolved organic phosphorus

Environmental capacity and fluxes of land-sourced pollutants around the Leizhou Peninsula in the summer

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