Sulfur Development in the Water-Sediment System of the Algae Accumulation Embay Area in Lake Taihu

Sulfur development in water-sediment systems is closely related to eutrophication and harmful algae blooms (HABs). However, the development of sulfur in water-sediment systems during heavy algae accumulation still remains unclear, especially in hyper-eutrophic shallow lakes. In this study, a quarterly field investigation was carried out for a year in the algae accumulated embay area of Lake Taihu, accompanied by a short-term laboratory experiment on algae accumulation. The results show that hydrogen sulfide and methanethiol dominated the volatile sulfur compounds (VSCs) in the water during non-accumulation seasons, whereas the concentrations of dimethyl sulfides increased during heavy algae accumulation, both in the field and the laboratory. An increase in the acid volatile sulfide (AVS) in the surface sediments was also discovered together with the increase in dimethyl sulfides. The depletion of oxygen in the overlying water and sediment–water interface during the heavy algae accumulation and decomposition was found to be closely related to both the increase in VSCs in the overlying water and increase in AVS in the sediment. The increased concentrations of these reductive sulfocompounds might aggravate the eutrophication and HABs and should be given more consideration in future eutrophication control plans for lakes.

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Contemporary issues in watershed and water quality modeling for eutrophication control

Water Science & Technology ◽

10.2166/wst.1998.0183 ◽

1998 ◽

Vol 37 (3) ◽

pp. 93-102

Author(s):

Robert V. Thomann ◽

Lewis C. Linker

Keyword(s):

Coastal Waters ◽

Water Quality Modeling ◽

Significant Decline ◽

Suspension Feeding ◽

Watershed Model ◽

Nitrogen And Phosphorus ◽

Overlying Water ◽

Chesapeake Bay Watershed ◽

Eutrophication Control ◽

Quality Modeling

Three issues are discussed: controllability of nonpoint nutrient loadings using watershed models; the sometimes counter intuitive results from eutrophication models from nutrient controls for coastal waters; and the potential significant interaction of improvement in habitat for suspension feeding bivalves. For the Chesapeake Bay watershed model, and for Limit of Technology (LOT) controls, a 16% and 45% reduction in nitrogen and phosphorus, respectively, is calculated. For the Bay, it is concluded that removal of phosphorus only is less effective than nitrogen in improving bottom water DO because of differential transport of nitrogen downstream. For the Delaware estuary, a significant decline in phytoplankton chlorophyll has been observed in the absence of any nutrient controls but in the presence of improved DO. A simple model is offered that hypothesized an increase in benthic bivalve filtration of overlying water as a result of improvement in DO.

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Acid Volatile Sulfide (AVS) and Simultaneously Extracted Metals (SEM) in Surface Sediments of Chaohu Lake, Anhui Province, China

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.779-780.1213 ◽

2013 ◽

Vol 779-780 ◽

pp. 1213-1219

Author(s):

Shu Qin Chen ◽

Lei Zhang ◽

Zhao Sheng Chu ◽

She Rong Hu

Keyword(s):

Surface Sediments ◽

Local Scale ◽

Acid Volatile Sulfide ◽

Anthropogenic Factors ◽

Chaohu Lake ◽

Lake Surface ◽

Different Seasons ◽

The One ◽

Short Time ◽

Spot 5

At present there are few studies on the AVS and SEM in sediments of Chaohu Lake. Most of the previous studies on heavy metals based on the one time, the short-time or a local-scale survey. In this paper, [AVS] and [SEM] in Chaohu Lake surface sediments were studied for different seasons in 2007, 2008 and 2009. The results showed that: (a) The three-year average of [AV and [ΣSE in surface sediments of Chaohu Lake is 4.2μmolg-1and 2.31μmolg-1, respectively. The maximum of [AV appears on spot 5 (14.845μmolg-1) in summer while the minimum appears on spot 9 (0.13μmolg-1) in winter. (b) In spot 5 which near the estuary of Yuxi River, three-year average of [SE was the maximum (5.81μmolg-1), and the minimum of [ΣSE (0.07μmolg-1) appears on spot 8 which locates in the middle of Chaohu Lake. In spot 13 the [ΣSEM]-[AVS]=3.2>2 and [ΣSEM]/[AVS]=4.45>2.34 indicate that heavy metal contaminants from Hefei city have threatened the biosafety of Chaohu Lake. (c) The spatial autocorrelation of SEMCdis weak, which indicates that spatial distribution of SEMCdis determined by anthropogenic factors rather than sediments' own attribute. Chaohu Lake has been heavily polluted by Cd from no-point source and electronic electroplating industry.

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Remotely sensed short-term changes in noctilucent algae blooms in the Bohai Sea

International Journal of Remote Sensing ◽

10.1080/01431161.2021.1984609 ◽

2021 ◽

Vol 42 (22) ◽

pp. 8661-8674

Author(s):

Liang Ma ◽

Yan Liu ◽

Bowen Zhang ◽

Lingxing Lu ◽

Guangshun Sun ◽

...

Keyword(s):

Bohai Sea ◽

Remotely Sensed ◽

Short Term ◽

The Bohai Sea ◽

Algae Blooms

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Heterogeneity of Bacterial Community Compositions in Surface Sediments of Three Lake Zones in Lake Taihu

Proceedings of the National Academy of Sciences India Section B Biological Sciences ◽

10.1007/s40011-014-0378-8 ◽

2014 ◽

Vol 85 (2) ◽

pp. 465-474 ◽

Cited By ~ 2

Author(s):

Rui Huang ◽

Dayong Zhao ◽

Cuiling Jiang ◽

Meng Wang

Keyword(s):

Bacterial Community ◽

Surface Sediments ◽

Lake Taihu

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Numerical forecasting of short-term algae-induced black bloom in eutrophic shallow lake:A case study of Lake Taihu

Journal of Lake Sciences ◽

10.18307/2016.0402 ◽

2016 ◽

Vol 28 (4) ◽

pp. 701-709 ◽

Cited By ~ 2

Author(s):

LI Wei ◽

◽

QIN Boqiang ◽

ZHANG Yunlin ◽

ZHU Guangwei

Keyword(s):

Lake Taihu ◽

Short Term

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Comparative analysis of the total and active bacterial communities in the surface sediment of Lake Taihu

FEMS Microbiology Ecology ◽

10.1093/femsec/fiaa059 ◽

2020 ◽

Vol 96 (5) ◽

Author(s):

Tong-tong Liu ◽

Hong Yang

Keyword(s):

Bacterial Community ◽

Surface Sediment ◽

Bacterial Communities ◽

Surface Sediments ◽

Lake Taihu ◽

Dynamic Changes ◽

Dna And Rna ◽

Close Relationship ◽

Total Bacterial Community ◽

Quantitative Results

ABSTRACT Bacterial communities play crucial roles in the biogeochemical cycle of the surface sediments of freshwater lakes, but previous studies on bacterial community changes in this habitat have mostly been based on the total bacterial community (DNA level), while an exploration of the active microbiota at the RNA level has been lacking. Herein, we analysed the bacterial communities in the surface sediments of Lake Taihu at the DNA and RNA levels. Using MiSeq sequencing and real-time quantification, we found that the sequencing and quantitative results obtained at the RNA level compared with the DNA level were more accurate in responding to the spatiotemporal dynamic changes of the bacterial community. Although both sequencing methods indicated that Proteobacteria, Chloroflexi, Acidobacteria, Nitrospirae, Bacteroidetes and Actinobacteria were the dominant phyla, the co-occurrence network at the RNA level could better reflect the close relationship between microorganisms in the surface sediment. Additionally, further analysis showed that Prochlorococcus and Microcystis were the most relevant and dominant genera of Cyanobacteria in the total and active bacterial communities, respectively; our results also demonstrated that the analysis of Cyanobacteria-related groups at the RNA level was more ‘informative’.

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Distribution and Release Characteristics of Phosphorus in a Reservoir in Southwest China

International Journal of Environmental Research and Public Health ◽

10.3390/ijerph16030303 ◽

2019 ◽

Vol 16 (3) ◽

pp. 303 ◽

Cited By ~ 4

Author(s):

Yuanming Wang ◽

Kefeng Li ◽

Ruifeng Liang ◽

Shiqing Han ◽

Yong Li

Keyword(s):

Water Temperature ◽

Release Rate ◽

Surface Sediments ◽

Southwest China ◽

Particulate Phosphorus ◽

Limiting Factor ◽

Dam Construction ◽

Overlying Water ◽

Reservoir Water ◽

Main Form

Dam construction changes the nutrient transport of a river system. Phosphorus is an important fundamental material in the global biochemical cycle and is always a limiting factor in the primary productivity of reservoirs. Extending the study of phosphorus in reservoirs is necessary given the dam construction in southwest China. Zipingpu Reservoir was chosen as the research site in this study. The form and distribution of phosphorus in the reservoir’s surface sediments and overlying water were analyzed. The results showed that overall, the total phosphorus (TP) content of surface sediments in the Zipingpu Reservoir decreased from the tail to the front of the dam. The TP content ranged from 682.39 to 1609.06 mg/kg, with an average value of 1121.08 mg/kg. The TP content at some sampling points was affected by exogenous input. Inorganic phosphorus (IP) was the main form of phosphorus in surface sediments and had a proportion of 89.38%. Among the forms of IP, the content of Ca-P was larger than that of O-P; Ex-P, Fe-P, and Al-P had the lowest contents. Particulate phosphorus (PP) was the main form of phosphorus in the overlying water of the Zipingpu Reservoir and was strongly affected by hydrodynamic conditions. The content of total dissolved phosphorus (TDP) in the overlying water was relatively low. To further understand the risk of phosphorus release in the surface sediments in the reservoir, the rate and flux of phosphorus exchange at the sediment-overlying water interface were investigated through laboratory experiments. The results showed that both water temperature and pH significantly affected the sediment release rate, but the influence of water temperature was more significant. Acidic and alkaline conditions were conducive to the release of phosphorus from sediment, while a neutral environment was not. The release rate significantly increased with increasing water temperature, and a positive linear relationship was found between these two parameters. The sediment exhibited absorption characteristics when the water temperature was extremely low and exhibited releasing characteristics at a high temperature. These results could provide a theoretical basis for the management and protection of reservoir water environments.

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Spatial and Seasonal Distribution and Transportation of Different Forms of Phosphorus in the Middle Reaches of the Yarlung Zangbo River

Water ◽

10.3390/w10121858 ◽

2018 ◽

Vol 10 (12) ◽

pp. 1858 ◽

Cited By ~ 4

Author(s):

Xiaolong Cheng ◽

Yanan Huang ◽

Xunchi Pu ◽

Ruidong An ◽

Wendian Huang ◽

...

Keyword(s):

Surface Sediments ◽

Organic Phosphorus ◽

Nutrient Status ◽

Inorganic Phosphorus ◽

Research Area ◽

Phosphorus Concentration ◽

Wet Season ◽

Overlying Water ◽

Total Phosphorus Concentration ◽

Yarlung Zangbo River

The Yarlung Zangbo River basin ecosystem is fragile. The distribution and transportation of phosphorus is of great significance for aquatic environmental protection and ecological security. The sequential extraction method and molybdenum antimony anti-spectrophotometry were used to measure the concentrations of different forms of phosphorus in the surface sediments from 15 sampling sites along the middle reaches of the Yarlung Zangbo River and its tributaries. The results show that the total phosphorus concentration in the surface sediments is 194.0~540.7 mg/kg, which is mainly composed of inorganic phosphorus. The concentrations of various phosphorus forms ranked as calcium-bound phosphorus (355.6 ± 86.0 mg/kg) > soluble phosphorus (15.9 ± 10.0 mg/kg) > iron-bound phosphorus (12.4 ± 12.3 mg/kg) > organic phosphorus (9.6 ± 6.1 mg/kg) > occluded phosphorus (9.2 ± 3.8 mg/kg) > aluminum-bound phosphorus (5.4 ± 2.3 mg/kg). On the whole, phosphorus concentration is greater in wet season than dry season. Regarding the spatial distribution characteristics, there are great disparities in the different forms of phosphorus in the middle reaches of the Yarlung Zangbo River. Comprehensive analysis shows that phosphorus of this area is mainly self-generated, and concentration of bioavailable phosphorus is small, demonstrating there will not be a large release. We also drew a “specific triangle” of the different forms of phosphorus concentrations in the research area and defined the “α” angle to determine the nutrient status of the overlying water quickly and effectively. Finally, phosphorus flux of the mainstream was estimated. This research may provide information on the phosphorus of Plateau Rivers.

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Spatial–temporal variation of nitrogen and diffusion flux across the water–sediment interface at the hydro-fluctuation belt of Danjiangkou reservoir in China

Water Science & Technology Water Supply ◽

10.2166/ws.2020.044 ◽

2020 ◽

Vol 20 (4) ◽

pp. 1241-1252

Author(s):

Han Wang ◽

Yuping Han ◽

Lide Pan

Keyword(s):

Diffusion Flux ◽

Sample Collection ◽

Sediment Pore Water ◽

Overlying Water ◽

Danjiangkou Reservoir ◽

Water And Sediment ◽

Water Quality Deterioration ◽

Nitrogen Contents ◽

And Diffusion ◽

Sediment Interface

Abstract Based on overlying water and sediment sample collection from 15 sites during July, September, November 2018 and January 2019 in the hydro-fluctuation belt of Danjiangkou reservoir China, the variation of nitrogen (N) was studied. And the concentrations of NH4+-N, NO3−-N and NO2−-N in the sediment, pore water and overlying water were determined to evaluate the diffusion flux across the water–sediment interface. The results showed that the lowest sediment N concentration was 36.54 mg/L in July, and the highest one was 145.93 mg/L in November. Spatially, the sediment N concentrations were higher in tidal soil and loam than in sandy soil. According to the diffusion fluxes of NH4+, NO3− and NO2−, sediments at all sites tend to release N to the overlying water except in the sampling month of November, when the sediment acts as a sink of NO3−. The highest release rates of NH4+-N and NO3−-N were 17.66 mg m−2·d−1 and 80.15 mg m−2·d−1, respectively, which are much higher than the release rate of NO2−-N (0.29 mg m−2·d−1). The findings indicate that hydro-fluctuation belt sediment contributes a lot to the nitrogen contents in the overlying water, and internal pollution is a main reason for the water quality deterioration and even eutrophication.

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