Responses of phytoplankton functional groups to environmental factors in the Pearl River, South China

Long, Shiqi; Zhang, Ting; Fan, Jie; Li, Can; Xiong, Kangning

doi:10.1007/s11356-020-08344-9

Cited by 20 publications

(12 citation statements)

References 40 publications

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“…In general, Figure shows that phytoplankton during the entire study period was dominated by Phyla Cyanophyta, Chlorophyta, and Bacillariophyta in the Pearl River, while the prominent phytoplankton genera included Microcystis (cyanobacteria), Scenedesmus (Chlorophyceae), Coscinodiscus and Cyclotella (Coscinodiscophyceae), and Melosira (Bacillariophyceae). These results were consistent with previous works. ,, The abundance of total phytoplankton showed significant spatial and temporal variations, with the highest abundance (2.19 × 10 7 cells L –1 ) at site Z2 in September 2018, while the lowest (3.10 × 10 6 cells L –1 ) at site Z9 in July 2018 (Figure a). Same as total phytoplankton, the abundance of Scenedesmus spp.…”

Section: Results and Discussionsupporting

confidence: 93%

“…These results were consistent with previous works. 5,26,39 The abundance of total phytoplankton showed significant spatial and temporal variations, with the highest abundance (2.19 × 10 7 cells L −1 ) at site Z2 in September 2018, while the lowest (3.10 × 10 6 cells L −1 ) at site Z9 in July 2018 (Figure 3a). Same as total phytoplankton, the abundance of Scenedesmus spp.…”

Section: Study Area and Sample Collectionmentioning

confidence: 99%

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Impact of Phytoplankton Blooms on Concentrations of Antibiotics in Sediment and Snails in a Subtropical River, China

Tang

Fang

Tam

et al. 2021

Environ. Sci. Technol.

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The present three-year field investigation on sediment in the eutrophic Pearl River in South China showed that concentrations of sulfonamides (SAs), fluoroquinolones (FQs), and macrolides (MLs) in the river areas where blooms occurred were 4.6, 2.4, and 3.4 times higher than those without blooms, respectively, but the respective concentrations of tetracycline (TC) and oxytetracycline (OTC) in the areas with blooms were 2.6 and 3.8 times lower than those without. Significant positive correlations were found between concentrations of chlorophyll a in water and most antibiotics in sediment. Further investigation in each season suggested that lower diffusion but higher sinking were possible reasons driving the burial of sulfapyridine (SPD), sulfamethoxazole (SMX), and trimethoprim (TMP) in sediment from areas where blooms occurred, with burial rates up to 14.86, 48.58, and 52.19 g month–1, respectively. Concentrations of TCs in both water and sediment were inversely correlated with phytoplankton biomass, which might be related to the enhanced biodegradation capacity of bacteria caused by phytoplankton blooms. Phytoplankton also affected concentrations of antibiotics in the snail, Bellamya purificata, with higher values in March but lower values in September. The concentration of antibiotics in snails positively correlated with that in sediment when snails were dormant but with antibiotics in water after dormancy.

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Section: Results and Discussionsupporting

confidence: 93%

Section: Study Area and Sample Collectionmentioning

confidence: 99%

Impact of Phytoplankton Blooms on Concentrations of Antibiotics in Sediment and Snails in a Subtropical River, China

Tang

Fang

Tam

et al. 2021

Environ. Sci. Technol.

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“…In the present work, location of the sampling sites along Pearl River in Guongdong Province, P.R. S1) [19][20].…”

Section: Study Areamentioning

confidence: 99%

“…After the water sample is collected, acidify it with sulfuric acid to pH<2 and determine it within 24 hours. TN and TP concentrations in each sample were determined using the alkaline potassium persulfate oxidation method [19][20]. Method for determination of total nitrogen, the 5 ml alkaline potassium persulfate solution and the water sample (10 mL) was added into 25 ml graduated tube with plug and wrap with gauze, after 120ºC digestion 30 min, the absorbance values were determined by UV spectrophotometry at 220 nm and 275 nm, respectively.…”

Section: Environmental Samplingmentioning

confidence: 99%

Nutrients Affecting the Characteristics of Food-Web Structure in Aquatic Ecosystem of Pearl River

Xiang¹,

Long²,

Dang³

2022

Pol. J. Environ. Stud.

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The water quality has degraded with economic development globally. However, the relationship between food-web structure and nitrogen and phosphorus is of rare concern. To study food chain in this ecosystem, we measured the concentrations of stable isotope value δ 13 C and δ 15 N in aquatic matter and organisms in Pearl River. The δ 13 C and δ 15 N concentrations ranged from −41.2‰ to −19.4‰ and from 0.81‰ to 25.4‰, respectively. The δ 13 C concentrations in consumers were significantly higher than the particulate organic matter (POM), periphyton, phytoplankton, and higher aquatic plants. The δ 13 C of POM was likely derived from phytoplankton and exogenous organic detritus entering from a tributary, rather than from endogenous phytoplankton in the main river channel. The δ 13 C of phytoplankton was derived from eutrophic water with high nitrogen and phosphorus concentrations. Total δ 13 C was significantly higher in fish than in POM, phytoplankton, higher aquatic plants, and zooplankton, indicating that those components were the main carbon sources for fish. The carbon sources tended to be the same for different fish species in the same season at the same site, but different for a given fish species among seasons and sampling sites. This finding suggested that the feeding habits of different fish species converge as an adaptation to change environment. The food chain was longer (trophic level = 4.4) in river subsections with more carnivorous fish, such as Erythroculter pseudobrevicauda and Coilia grayii, and shorter in areas with more omnivorous fish. The total nitrogen and total phosphorus concentrations in the water were negatively correlated with food-chain length (R 2 = 0.67, P<0.05; R 2 = 0.40, P<0.05). These results suggested that limiting nitrogen and phosphorus inputs into the water body would reduce the ecological risk in this area.

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“…A feasibility study on the pigment composition method evaluating phytoplankton composition (CHEMTAX-HPLC method) was carried out from a river system (Weihe River, Northwest China) and suggested that CHEMTAX-HPLC method was not accurate enough to characterize the phytoplankton communities in the freshwater ecosystem (Tian et al 2019). Long et al (2020) illustrated that morphology-based functional groups of phytoplankton could be an effective biological water quality indicator based on a case study in the Pearl River, South China. 3.…”

Section: Phytoplankton and Bacterioplankton Communitymentioning

confidence: 99%

Editorial special issue on cyanobacterial blooms and water ecological restoration

2020

Environ Sci Pollut Res

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Cyanobacterial bloom formation and aquatic ecosystem degradation driven by global warming and eutrophication have become serious ecological and environmental problems worldwide. Recently, great progress in physiology of cyanobacteria has been achieved, but our knowledge on the mechanisms of bloom formation of cyanobacterial species and the feasible methods for ecological restoration is still poor. The 6th Forum on Cyanobacterial Blooms, organized by the Northwest Agriculture and Forest University, Yangling, China, in 22-23 June 2019, was held to share most recent research progress in cyanobacterial blooms and ecological restoration around China. This forum was held annually since 2014. The forum was jointly proposed and initiated by Prof. Guoxiang Wang from Nanjing Normal University and Prof. Renhui Li from the Institute of Hydrobiology, Chinese Academy of Sciences. Since then, the form has covered a wide variety of topics, including the most common toxic bloomforming cyanobacterium Microcystis, cyanobacteria blooms and nutrient cycling in shallow lakes, interactions between cyanobacterial bloom formation and physical, chemical, and biological factors, as well as monitoring and early warning of cyanobacterial blooms. This Special Issue of Environmental Science and Pollution Research comprises selected papers presented in the 6th Forum on Cyanobacterial Blooms. In detail, 13 communications are presented in this special issue, elucidating the following topics:

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Responses of phytoplankton functional groups to environmental factors in the Pearl River, South China

Cited by 20 publications

References 40 publications

Impact of Phytoplankton Blooms on Concentrations of Antibiotics in Sediment and Snails in a Subtropical River, China

Impact of Phytoplankton Blooms on Concentrations of Antibiotics in Sediment and Snails in a Subtropical River, China

Nutrients Affecting the Characteristics of Food-Web Structure in Aquatic Ecosystem of Pearl River

Editorial special issue on cyanobacterial blooms and water ecological restoration

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