Monsoon-driven Dynamics of water quality by multivariate statistical methods in Daya Bay, South China Sea

Wu, Mei; Wang, You Shao; Sun, Cui; Sun, Fu Lin; Cheng, Hao; Wang, Yu Tu; Dong, Jun; Wu, Jingfeng

doi:10.2478/s13545-012-0040-0

Cited by 11 publications

(2 citation statements)

References 32 publications

(43 reference statements)

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“…From the above, we know that the concentration of nutrients released by the sediments from 100 m 2 to aquaculture-cages is far larger than the background concentration in seawater. Thanks to the movement of rising tide, falling tide and ocean currents, the pollutants released to seawater by the sediments are diffused, diluted and mixed so that the concentration of pollutants is reduced [ 17 ]. Generally, aquaculture-cages are floating on the sea year after year, creating nutrient-rich sediments and releasing them to seawater.…”

Section: Resultsmentioning

confidence: 99%

Diffusion of Nitrogen and Phosphorus Across the Sediment-Water Interface and In Seawater at Aquaculture Areas of Daya Bay, China

Cheng

Zeng

Guo

et al. 2014

IJERPH

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With the yearly increasing marine culture activities in floating cages in Daya Bay, China, the effects of pollution may overlap and lead to more severe water environmental problems. In order to track the impacts of the marine culture in floating cages on water environment, sediments and overlying water were sampled by cylindrical samplers at three representative aquaculture areas of Daya Bay. The water content, porosity, density of sediments as well as the vertical distributions of ammonia nitrogen and active phosphate in pore water along sediments depth were measured. The release rate and annual released quantity of the nutrients across sediment-water interface were calculated using Fick’s Law. A horizontal two-dimensional mathematical model was developed to compute the spatial and temporal distributions of the nutrients in seawater after being released across the sediment-water interface. The results showed that the sediments, with a high content and a large annual released quantity of nitrogen and phosphorus, constitute a potential inner source of seawater pollution. Influenced by tide and water depth, the scope of diffusion and migration of the nutrients appears as a long belt which is about 1 km long and 50 m wide. Seawater in this area is vulnerable to eutrophication.

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Section: Resultsmentioning

confidence: 99%

Diffusion of Nitrogen and Phosphorus Across the Sediment-Water Interface and In Seawater at Aquaculture Areas of Daya Bay, China

Cheng

Zeng

Guo

et al. 2014

IJERPH

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“…Coastal pollution often results in adverse conditions leading to the development of harmful algal blooms and/or eutrophication. This has resulted in an ecological unbalance, the loss of biodiversity, and the rapid reduction of biological resources (Wu et al 2012). Moreover, there is a large input of pollutants to the coastal…”

Section: Introductionmentioning

confidence: 99%

Influence of environmental changes on picophytoplankton and bacteria in Daya Bay, South China Sea

Wang

et al. 2014

Cienc. Mar.

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Environmental changes driven by intense human disturbance and natural processes govern the abundance and distribution characteristics of two picophytoplankton groups (Synechococcus and picoeukaryotes). Picophytoplancton and high DNA (HDNA) and low DNA (LDNA) bacterial groups, identified by flow cytometry, were assessed during the autumn monsoon transition period in Daya Bay (South China Sea). The abundance of Synechococcus and picoeukaryotes ranged from 2.16 × 104 to 1.45 × 105 cell mL–1 and from 0.78 × 103 to 7.95 × 103 cell mL–1, respectively. The abundance of HDNA bacteria in surface water (mean: 5.58 × 105 cell mL–1) was greater than in bottom water (mean: 3.74 × 105 cell mL–1), with significant difference (n = 12, P = 0.05). The difference in LDNA abundances between surface (mean: 7.06 × 105 cell mL–1) and bottom (mean: 4.83 × 105 cell mL–1) waters was insignificant (n = 12, P > 0.05). The results of the principal component analysis showed that both picophytoplankton (Synechococcus and picoeukaryotes) and bacteria (HDNA and LDNA) were positively related to nutrients (NO3-N, NH4-N, and SiO3-Si). Three subsystems in the bay were identified as follows: the west and east parts, the central and northwest parts, and the mouth and central part.

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Phytoplankton community, structure and succession delineated by partial least square regression in Daya Bay, South China Sea

Wang

Cheng

et al. 2020

Ecotoxicology

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Monsoon-driven Dynamics of water quality by multivariate statistical methods in Daya Bay, South China Sea

Cited by 11 publications

References 32 publications

Diffusion of Nitrogen and Phosphorus Across the Sediment-Water Interface and In Seawater at Aquaculture Areas of Daya Bay, China

Diffusion of Nitrogen and Phosphorus Across the Sediment-Water Interface and In Seawater at Aquaculture Areas of Daya Bay, China

Influence of environmental changes on picophytoplankton and bacteria in Daya Bay, South China Sea

Phytoplankton community, structure and succession delineated by partial least square regression in Daya Bay, South China Sea

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